Academic article

• Hans Georg Schaathun; Tor Helleseth (2003). Separating and intersecting properties of BCH and Kasami codes. (external link)
• Tor Helleseth; Hans Georg Schaathun (2004). On the (2,1)-separating weight of the Kerdock code. (external link)
• N. Hamada; Tor Helleseth; Øyvind Ytrehus (1993). A new class of nonbinary codes meeting the Griesmer bound. (external link)
• Geir Jarle Ness; Tor Helleseth (2006). Cross correlation of m-sequences of different lengths. (external link)
• Chunlei Li; Nian Li; Tor Helleseth et al. (2014). The weight distributions of several classes of cyclic codes from APN monomials. (external link)
• Pascale Charpin; Tor Helleseth; Victor A. Zinoviev (2006). The coset distribution of triple-error-correcting binary primitive BCH codes. (external link)
• T.W. Sze; S. Chanson; Cunsheng Ding et al. (2003). Logarithm Cartesian Authentication Codes. (external link)
• Tor Helleseth (1992). Projective codes meeting the Griesmer bound. (external link)
• Tor Helleseth; Torleiv Kløve; Øyvind Ytrehus (1992). Generalized Hamming weights of linear codes. (external link)
• Kangquan Li; Chunlei Li; Tor Helleseth et al. (2021). Binary Linear Codes With Few Weights From Two-to-One Functions. (external link)
• Cunsheng Ding; Tor Helleseth; Halvard Martinsen (2001). New families of binary sequences with optimal three-level autocorrelation. (external link)
• Tor Helleseth; Chunming Rong; Kyeongcheol Yang (1998). New infinite families of 3-designs from Preparta codes over Z<SUB>4</SUB>. (external link)
• Tor Helleseth; Torleiv Kløve; Vladimir Levenshtein (1997). On the information function of an error-correcting code. (external link)
• Minjia Shi; Tor Helleseth; Patrick Solé (2021). Strongly regular graphs from reducible cyclic codes. (external link)
• Tor Helleseth; Alexander Kholosa; Sihem Mesnager (2012). Niho bent functions and Subiaco hyperovals. (external link)
• Lilya Budaghyan; Tor Helleseth (2011). New commutative semifields defined by new PN multinomials. (external link)
• Nian Li; Xiaohu Tang; Tor Helleseth (2011). Several Classes of Codes and Sequences Derived From a Z(4)-Valued Quadratic Form. (external link)
• Kangquan Li; Chunlei Li; Tor Helleseth et al. (2021). Cryptographically strong permutations from the butterfly structure. (external link)
• Zhengchun Zhou; Nian Li; Cuiling Fan et al. (2015). Linear codes with two or three weights from quadratic Bent functions. (external link)
• Yongbo Xia; Chunlei Li; Furong Bao et al. (2024). Further investigation on differential properties of the generalized Ness–Helleseth function. (external link)
• Minjia Shi; Shitao Li; Tor Helleseth (2024). The Weight Enumerator Polynomials of the Lifted Codes of the Projective Solomon-Stiffler Codes. (external link)
• Tor Helleseth; Alexander Kholosa (2010). New Binomial Bent Functions Over the Finite Fields of Odd Characteristic. (external link)
• X Tang; Tor Helleseth (2011). Generic Construction of Quaternary Sequences of Period 2N With Low Correlation From Quaternary Sequences of Odd Period N. (external link)
• Gaofei Wu; Nian Li; Tor Helleseth et al. (2014). Some classes of monomial complete permutation polynomials over finite fields of characteristic two. (external link)
• Minjia Shi; Tor Helleseth; Ferruh Ozbudak et al. (2022). Covering Radius of Melas Codes. (external link)
• Zhengchun Zhou; Tor Helleseth; Udaya Parampalli (2018). A Family of Polyphase Sequences with Asymptotically Optimal Correlation. (external link)
• Chunming Tang; Nian Li; Yanfeng Qi et al. (2016). Linear codes with two or three weights from weakly regular bent functions. (external link)
• Nian Li; Tor Helleseth; Xiaohu Tang (2013). Further results on a class of permutation polynomials over finite fields. (external link)
• Dan Zhang; Tor Helleseth (2020). New optimal sets of perfect polyphase sequences based on circular Florentine arrays. (external link)
• D.J. Shin; P. V. Kumar; Tor Helleseth (2001). 5-Designs for the lifted Golay code over Z_4 via an Assmuss-Mattson-type approach. (external link)
• Tor Helleseth; Petri Rosendahl (2005). New pairs of m-sequences with four-level cross-correlation. (external link)
• Aina Johansen; Tor Helleseth; Xiaohu Tang (2008). The correlation distribution of quaternary sequences of period 2(2(n)-1). (external link)
• Pascale Charpin; Tor Helleseth; Victor Zinoviev (2007). Propagation characteristics of x --> x^{-1} and Kloostman sums. (external link)
• Cunsheng Ding; Tor Helleseth; Torleiv Kløve et al. (2007). A generic construction of cartesian authentication codes. (external link)
• P. V. Kumar; Tor Helleseth; A. R. Calderbank et al. (1996). Large families of quaternary sequences with low correlation. (external link)
• Guang Gong; Tor Helleseth; Hong-yeop Song et al. (2006). Preface. (external link)
• GaoFei Wu; Nian Li; Tor Helleseth et al. (2015). Some classes of complete permutation polynomials over $\mathbb{F}_q $. (external link)
• Tor Helleseth; Torleiv Kløve (1996). The weight hierarchies of some product codes. (external link)
• Minjia Shi; Shitao Li; Tor Helleseth et al. (2025). Determining the covering radius of all generalized Zetterberg codes in odd characteristic. (external link)
• Haode Yan; Zhengchun Zhou; Jian Weng et al. (2019). Differential Spectrum of Kasami Power Permutations Over Odd Characteristic Finite Fields. (external link)
• Wenjie Jia; Xiangyong Zeng; Tor Helleseth et al. (2012). A class of binomial bent functions over the finite fields of odd characteristic. (external link)
• Ziran Tu; Chunlei Li; Xiangyong Zeng et al. (2025). New Characterizations of Dillon-like Hyperbent Functions via Dickson Polynomials. (external link)
• Lilya Budaghyan; Claude Carlet; Tor Helleseth et al. (2016). On the (non-)existence of APN (n, n)-functions of algebraic degree n. (external link)
• Tor Helleseth; Torleiv Kløve (1991). The number of cross-join pairs in maximum lenght linear sequences. (external link)
• N. Hamada; Tor Helleseth (1993). A characterization of some @(v%c+2v%d,v%b2v%c;k-1,3@)- minihypers and some (v%<k%>-30,k,3%(k-1%)-21;3)-codes meeting the Griesmer bound. (external link)
• Nian Li; Xiaohu Tang; Tor Helleseth (2014). New M-ary sequences with low autocorrelation from interleaved technique. (external link)
• Tor Helleseth; D. Sandberg (1997). Some power mappings with low differential uniformity. (external link)
• P. V. Kumar; Tor Helleseth (1997). An Expansion for the Coordinates of the Trace Function over Galois Rings. (external link)
• GaoFei Wu; Keqin Feng; Nian Li et al. (2023). New Results on the -1 Conjecture on Cross-Correlation of m-Sequences Based on Complete Permutation Polynomials. (external link)
• Zhimin Sun; Xiangyong Zeng; Chunlei Li et al. (2017). Investigations on Periodic Sequences with Maximum Nonlinear Complexity. (external link)
• Tor Helleseth (1992). Legendre sums and codes related to QR codes. (external link)
• Tor Helleseth; Victor Zinoviev (2001). Codes with the same coset weight distribution as the $Z_4$-linear Goethals codes. (external link)
• Nian Li; Tor Helleseth (2019). New permutation trinomials from Niho exponents over finite fields with even characteristic. (external link)
• Diana Davidova; Lilya Budaghyan; Claude Michael Carlet et al. (2021). Relation between o-equivalence and EA-equivalence for Niho bent functions. (external link)
• Tor Helleseth; Torleiv Kløve; Vladimir Levenshtein (2005). Error-correction capability of binary linear codes. (external link)
• Tor Helleseth; Chunming Rong; K Yang (2001). New 3-designs for Goethals codes over $Z_4$. (external link)
• Tor Helleseth; Victor Zinoviev (2001). On coset weight distribution of the $Z_4$-linear Goethals code. (external link)
• Noboru Hamada; Tor Helleseth; Halvard Martinsen et al. (2000). There is no ternary [28,6,18] code. (external link)
• Guang Gong; Tor Helleseth; Honggang Hu et al. (2012). On the dual of certain ternary weakly regular bent functions. (external link)
• Cunsheng Ding; Tor Helleseth (2013). Optimal ternary cyclic codes from monomials. (external link)
• Pascale Charpin; Tor Helleseth; Victor Zinoviev (2008). On cosets of weight 4 of BCH(2^m, 8), m even, and exponential sums. (external link)
• Tor Helleseth; Cees J. A. Jansen; Oleksandr Kazymyrov et al. (2013). State space cryptanalysis of the MICKEY cipher. (external link)
• Dan Zhang; Tor Helleseth (2022). Sequences with Good Correlations Based on Circular Florentine Arrays. (external link)
• Jinquan Luo; Tor Helleseth (2011). Constant Composition Codes as Subcodes of Cyclic Codes. (external link)
• Lilya Budaghyan; Claude Michael Carlet; Tor Helleseth et al. (2020). On the Distance Between APN Functions. (external link)
• Tor Helleseth (2010). Crosscorrelation of m-sequences, exponential sums and Dickson polynomials. (external link)
• Dong-joon Shin; Vijay Kumar; Tor Helleseth (2004). An Assmus-Mattson-type approach for identifying 3-designs from linear codes over Z_4. (external link)
• Håvard Molland; Tor Helleseth (2004). An improved correlation attack against irregular clocked and filtered keystream generators. (external link)
• Yongbo Xia; Tor Helleseth; Gaofei Wu (2014). A note on cross-correlation distribution between a ternary m-sequence and its decimated sequence. (external link)
• Tor Helleseth; P. Vijay Kumar; Oscar Moreno et al. (1996). Improved Estimates via Exponential Sums for the Minimum Distance of Z%_4-Linear Trace Codes. (external link)
• Yongbo Xia; Nian Li; Xiangyong Zeng et al. (2016). An open problem on the distribution of a Niho-type cross-correlation function. (external link)
• Yongbo Xia; Furong Bao; Shaoping Chen et al. (2024). More Differential Properties of the Ness-Helleseth Function. (external link)
• Xiaohu Tang; Tor Helleseth; Lei Hu et al. (2009). Two new families of optimal binary sequences obtained from quaternary sequences. (external link)
• Guang Gong; Tor Helleseth; Honggang Hu (2012). A three-valued walsh transform from decimations of Helleseth-Gong sequences. (external link)
• Zibi Xiao; Xiangyong Zeng; Chunlei Li et al. (2017). New generalized cyclotomic binary sequences of period p2. (external link)
• A Chang; P Gaal; S. W. Golomb et al. (2000). On a conjectured ideal autocorrelation sequence and a relation to a triple-error-correcting cyclic code,. (external link)
• Chunming Rong; Tor Helleseth (1996). Use Characteristic Sets to Decode Cyclic Codes up to Actual Minimum Distance. (external link)
• Erik R. Hauge; Tor Helleseth (1996). De Bruijn sequences, irreducible codes and cyclotomy. (external link)
• SH Kim; Jong-seon No; HB Chung et al. (2005). New cyclic relative difference sets constructed from d-homogeneous functions with difference-balanced property. (external link)
• Yongbo Xia; Tor Helleseth; Chunlei Li (2015). Some new classes of cyclic codes with three or six weights. (external link)
• Victor Zinoviev; Tor Helleseth; Pascale Charpin (2005). On cosets of weight 4 of binary BCH codes of minimum distance 8 and exponential sums. (external link)
• Tor Helleseth; Torleiv Kløve; Johannes Mykkeltveit (1978). On the covering radius of binary codes. (external link)
• Geir Jarle Ness; Tor Helleseth (2007). A new family of four-valued cross correlation between m-sequences of different lengths. (external link)
• Xiaohu Tang; Tor Helleseth; L. Hu et al. (2007). A new family of Gold-like sequences. (external link)
• Sondre Rønjom; Guang Gong; Tor Helleseth (2007). A survey of recent attacks on the filter generator. (external link)
• Tor Helleseth; Oleksandr Kholosa (2007). On the dual of monomial quadratic p-ary bent functions. (external link)
• Noboru Hamada; Tor Helleseth (1996). A characterization of (3v%b+v%e, 3v%a+v%d;4,3)-minihyphers and projective ternary (78,5,51) codes. (external link)
• Geir Jarle Ness; Tor Helleseth (2006). A new three-valued crosscorrelation between m-sequences of different lengths. (external link)
• Pan Tan; Zhengchun Zhou; Deng Tang et al. (2018). The weight distribution of a class of two-weight linear codes derived from Kloosterman sums. (external link)
• Yuying Man; Yongbo Xia; Chunlei Li et al. (2022). On the differential properties of the power mapping x^{p^m+2}. (external link)
• Lilya Budaghyan; Alexander Kholosa; Claude Carlet et al. (2016). Univariate niho bent functions from o-polynomials. (external link)
• N. Hamada; Tor Helleseth; Øyvind Ytrehus (1993). There are exact two nonequivalent @<20,5,12;3@>-codes. (external link)
• Chaoyun Li; Xiangyong Zeng; Chunlei Li et al. (2016). Construction of de Bruijn sequences from LFSRs with reducible characteristic polynomials. (external link)
• K. Yang; Tor Helleseth (1997). On the Weight Hierarchy of Preparata Codes Over Z₄. (external link)
• Tor Helleseth; Torleiv Kløve (1997). The Newton radius of codes. (external link)
• Lilya Budaghyan; Claude Carlet; Tor Helleseth et al. (2015). On o-equivalence of Niho bent functions. (external link)
• Minjia Shi; Tor Helleseth; Ferruh Özbudak (2023). Covering Radius of Generalized Zetterberg Type Codes Over Finite Fields of Odd Characteristic. (external link)
• Mehdi Hassanzadeh; Tor Helleseth (2010). Algebraic Attack on the Alternating Step(r,s) Generator. (external link)
• Adel Alahmadi; Hussain Alhazmi; Shakir Ali et al. (2017). An analogue of the ℤ4-Goethals code in non-primitive length. (external link)
• Hans Dobbertin; Tor Helleseth; P. V. Kumar et al. (2001). Ternary m-sequences with three-valued crosscorrelation function: Two new decimations. (external link)
• J.S. No; H Chung; Hong-yeop Song et al. (2001). New construction for binary sequences of period $p^m-1$ with optimal autocorrelation using $(z+1)^d+az^d+b$. (external link)
• Tor Helleseth; P. V. Kumar; Halvard Martinsen (2001). A new family of ternary sequences with ideal two-level autocorrelation function. (external link)
• Lilya Budaghyan; Claude Michael Carlet; Tor Helleseth et al. (2018). On Upper Bounds for Algebraic Degrees of APN Functions. (external link)
• Guang Gong; Tor Helleseth; P. Vijay Kumar (2018). Solomon W. Golomb - Mathematician, Engineer, and Pioneer. (external link)
• N. Hamada; Tor Helleseth (1994). A characterization of some Temary Codes Meeting the Griesmer Bound. (external link)
• Vladmir Edemsky; Chunlei Li; Xiangyong Zeng et al. (2019). The linear complexity of generalized cyclotomic binary sequences of period p^n. (external link)
• C. Ding; Tor Helleseth (1998). On cyclotomic sequences of order r. (external link)
• C. Ding; Tor Helleseth (1998). New generalized cyclotomy and its applications. (external link)
• R. Anderson; C. Ding; Tor Helleseth et al. (1998). How to build robust shared control systems. (external link)
• Tor Helleseth (2009). Linear and nonlinear sequences and applications to stream ciphers. (external link)
• Tor Helleseth; Dong-joon Shin; Jong-seon No (2004). On the p-rank and characteristic polynomials of cyclic difference sets. (external link)
• Lilya Budaghyan; Tor Helleseth (2010). Planar functions and commutative semifields. (external link)
• Yongbo Xia; Xianglai Zhang; Chunlei Li et al. (2020). The differential spectrum of a ternary power mapping. (external link)
• Iwan Duursma; Tor Helleseth; Chunming Rong et al. (1999). Split weight enumerators for the Preparata Codes with applications to designs. (external link)
• Lilya Budaghyan; Claude Carlet; Tor Helleseth et al. (2012). Further results on Niho bent functions. (external link)
• Tor Helleseth; Chunming Rong; Kyeongcheol Yang (1999). New Infinite Families of 3-Designs from Preparata Codes over Z4. (external link)
• Tor Helleseth; Chunming Rong; Daniel Sandberg (1999). New Families of Almost Perfect Nonlinear Power Mappings. (external link)
• Tor Helleseth; Chunming Rong; Kyeongcheol Yang (2001). New 3-Designs from Goethals Codes over Z4. (external link)
• Tor Helleseth; Noboru Hamada (1996). The uniqueness of [87,5,57;3]-codes and the nonexistence of [258,6,171;3]-codes. (external link)
• Tor Helleseth; Chunming Rong; Kyeongcheol Yang (2001). On t-designs from Codes over Z4. (external link)
• Ziran Tu; Xiangyong Zeng; Chunlei Li et al. (2018). A class of new permutation trinomials. (external link)
• Tor Helleseth; Cees J.A. Jansen; Shahram Khazaei et al. (2006). Security of jump controlled sequence generators for stream ciphers. (external link)
• Tor Helleseth; P. Vijay Kumar; Abhijit Shanbhag (1996). Codes with the same weight distributions as the Goethals codes and the Delsarte-Goethals codes. (external link)
• Nian Li; Tor Helleseth; Alexander Kholosa et al. (2013). On the Walsh transform of a class of functions From niho exponents. (external link)
• Aina Johansen; Tor Helleseth (2009). A family of $m$ -sequences with five-valued cross correlation. (external link)
• Seokbeom Hong; Hosung Park; Jong-Seon No et al. (2014). Near-optimal partial hadamard codebook construction using binary sequences obtained from quadratic residue mapping. (external link)
• Tor Helleseth; G Gong (2002). New nonbinary sequences with ideal two-level autocorrelation function. (external link)
• Yongbo Xia; Chunlei Li; Xiangyong Zeng et al. (2014). Some results on cross-correlation distribution between a p-Ary m-sequence and its decimated sequences. (external link)
• JS No; DJ Shin; Tor Helleseth (2004). On the p-ranks and characteristic polynomials of cyclic difference sets. (external link)
• Geir Jarle Ness; Tor Helleseth (2007). A new family of ternary almost perfect nonlinear mappings. (external link)
• Tor Helleseth; Chunming Rong; Daniel Sandberg (1999). New Families of Almost Perfect Nonlinear Power Mappings. (external link)
• Tor Helleseth; Torleiv Kløve; Vladimir Levenshtein (2003). Hypercubic 4 and 5-designs from double-error-correcting BCH codes. (external link)
• Victor Zinoviev; Tor Helleseth (2004). On weight distributions of shifts of Goethals-like codes. (external link)
• Sondre Rønjom; Tor Helleseth (2007). A new attack on the filter generator. (external link)
• Tor Helleseth; Jyrki Lahtonen; Petri Rosendahl (2007). On Niho type cross-correlation functions of m-sequences. (external link)
• Minjia Shi; Shitao Li; Tor Helleseth et al. (2025). Binary self-orthogonal codes which meet the Griesmer bound or have optimal minimum distances. (external link)
• Sondre Rønjom; Tor Helleseth (2007). Attacking the filter generator over GF(2^m). (external link)
• Abhijit G. Shanbhag; P. Vijay Kumar; Tor Helleseth (1996). Upper Bound for a Hybrid Sum Over Galois Rings with Applications to Aperiodic Correlation of Some q-ary Sequences. (external link)
• Chaoyun Li; Xiangyong Zeng; Chunlei Li et al. (2014). A class of de Bruijn sequences. (external link)
• Tor Helleseth; Alexander Kholosa; Sihem Mesnager (2011). Niho bent functions and Subiaco hyperovals. (external link)
• Tor Helleseth; Alexander Kholosa (2010). x^{2^l}+x+a and related affine polynomials over the finite fields of GF(2^k). (external link)
• Noboru Hamada; Tor Helleseth (2002). The nonexistence of a ternary [97,6,63] code. (external link)
• N. Hamada; Tor Helleseth; Øyvind Ytrehus (1993). A characterization of @(2(q+1)+2,2,2;t,q@)-minihypers in PG(t,q)(t@Z3,q_e@(3,4@)). (external link)
• Hans Dobbertin; Patrick Felke; Tor Helleseth et al. (2006). Niho type cross-correlation functions via Dickson polynomials and Kloosterman sums. (external link)
• Tor Helleseth; N. Hamada (1992). A characterization of some @(2v%<_a+1%> + v%<_g+1%>, 2v%<_a%> + v_g; k-1,3@)-minihypers and some (n,k,3%(k-1%) - 2@.3%(_a%) - 3%(_g%);3) -codes (k @Z 3,0 @z _a <_g < k - 1) meeting the Griesmer bound. (external link)
• Chunlei Li; Tor Helleseth (2012). New Nonbinary Sequence Families with Low Correlation and Large Linear Span. (external link)
• Tor Helleseth; S.H. Kim; J.S. No (2003). Linear complexity over $F_p$ and trace representation of Lempel-Cohn-Eastman sequences. (external link)
• Tor Helleseth; N. Hamada; Øyvind Ytrehus (1992). On the construction of @<q%4 + q%2 - q,5,q%4 - q%3 + q%2 - 2q;q@>codes meeting the Griesmer bound. (external link)
• Hongwei Zhu; Minjia Shi; Xiaoqiang Wang et al. (2022). The q-Ary Antiprimitive BCH Codes. (external link)
• X. Chen; I. S. Reed; Tor Helleseth et al. (1994). Use of Gr@øbner Bases to Decode Binary Cyclic Codes up to the True Minimum Distance. (external link)
• Noboru Hamada; Tor Helleseth (2000). Arcs, blocking sets and minihypers. (external link)
• Cunsheng Ding; Tor Helleseth; K. Y. Lam (2000). Duadic sequences of prime lengths. (external link)
• Noboru Hamada; Tor Helleseth (2000). The nonexistence of some ternary linear codes and some updates of the bounds for n_3(6,d), 1<=d<=243. (external link)
• Aina Johansen; Tor Helleseth; Alexander Kholosa (2009). Further results on m-sequences with five-valued cross correlation. (external link)
• Adel Alahmadi; Hussain Alhazmi; Tor Helleseth et al. (2016). On the lifted Melas code. (external link)
• Kyeongcheol Yang; Tor Helleseth (1998). On the weight hierarchy of the Goethals codes over Z₄. (external link)
• C. Ding; Tor Helleseth; W. Shan (1998). On the linear complexity of Legendre sequences. (external link)
• Guang Gong; Sondre Rønjom; Tor Helleseth et al. (2011). Fast discrete Fourier spectra attacks on stream ciphers. (external link)
• Hans Georg Schaathun; Tor Helleseth (2005). The second support weight distribution of the Kasami codes. (external link)
• Xiaohu Tang; Tor Helleseth; Aina Johansen (2008). On the correlation distribution of Kerdock sequences. (external link)
• Tor Helleseth; Daniel J. Katz; Chunlei Li (2021). The Resolution of Niho's Last Conjecture Concerning Sequences, Codes, and Boolean Functions. (external link)
• Ziran Tu; Xiangyong Zeng; Chunlei Li et al. (2015). Permutation polynomials of the form (x(pm)-x plus delta)(s)+L(x) over the finite field F-p2m of odd characteristic. (external link)
• Xiaofang Xu; Chunlei Li; Xiangyong Zeng et al. (2018). Constructions of complete permutation polynomials. (external link)
• J.w. Jang; Y.s. Kim; Jong-seon No et al. (2004). New family of p-ary sequences with optimal correlation property and large linear span. (external link)
• Tor Helleseth; Victor Zinoviev (2004). On a new identity for Kloosterman sums and nonlinear systems of equations over finite fields over characteristic 2. (external link)
• Tor Helleseth; Henk Hollmann; Alexander Kholosa et al. (2009). Proofs of two conjectures on ternary weakly regular bent functions. (external link)
• Tor Helleseth; Chunlei Li; Yongbo Xia (2024). Investigation of the permutation and linear codes from the Welch APN function. (external link)
• Lilya Budaghyan; Tor Helleseth (2011). ON ISOTOPISMS OF COMMUTATIVE PRESEMIFIELDS AND CCZ-EQUIVALENCE OF FUNCTIONS. (external link)
• Tor Helleseth; Chunming Rong; Kyeongcheol Yang (2001). New 3-Designs from Goethals Codes over Z4. (external link)
• Tor Helleseth; P. Vijay Kumar; A. G. Shanbhag (1996). Exponential sums over Galois rings and their applications. (external link)
• Sumeyra Hassan; Erdal Panayirci; Tor Helleseth et al. (2025). Design of Secure Multi-User Coded-SSK with Index Selecting Capability. (external link)
• Wenjie Jia; Xiangyong Zeng; Chunlei Li et al. (2013). Permutation polynomials with low differential uniformity over finite fields of odd characteristic. (external link)
• Tor Helleseth; Alexander Kholosa (2010). Sequences, bent functions and Jacobsthal sums. (external link)
• Tor Helleseth; Alexander Kholosa (2010). New binomial bent functions over the finite fields of odd characteristic. (external link)
• Yongbo Xia; Furong Bao; Shaoping Chen et al. (2024). A direct method for calculating the differential spectrum of an APN power mapping. (external link)
• Lilya Budaghyan; Claude Carlet; Tor Helleseth et al. (2012). Generalized bent functions and their relation to Maiorana-McFarland class. (external link)
• Tor Helleseth; Chunming Rong; K Yang (2001). On t-designs for codes over Z_4. (external link)
• Furong Bao; Yongbo Xia; Shaoping Chen et al. (2025). The differential spectrum of a power permutation. (external link)
• Chaoyun Li; Xiangyong Zeng; Tor Helleseth et al. (2014). The properties of a class of linear FSRs and their applications to the construction of nonlinear FSRs. (external link)
• Nian Li; Xiaohu Tang; Tor Helleseth (2014). New constructions of quadratic bent functions in polynomial form. (external link)
• Adel Alahmadi; Hussain Alhazmi; Tor Helleseth et al. (2015). On the lifted Zetterberg code. (external link)
• Pascale Charpin; Tor Helleseth; Victor Zinoviev (2007). The divisibility modulo 24 of Kloosterman sums on GF(2^m), m odd. (external link)
• Vladimir Edemskiy; Chunlei Li; Xiangyong Zeng et al. (2018). The linear complexity of generalized cyclotomic binary sequences of period pn. (external link)
• Kangquan Li; Chunlei Li; Tor Helleseth et al. (2021). A Complete Characterization of the APN Property of a Class of Quadrinomials. (external link)
• Pascale Charpin; Tor Helleseth; Victor Zinoviev (2009). Divisibility properties of classical binary Kloosterman sums. (external link)
• Tor Helleseth; José Felipe Voloch (2004). Double circulant quadratic residue codes. (external link)
• Sondre Rønjom; Tor Helleseth (2007). The linear vector space spanned by the nonlinear filter generator. (external link)
• Nian Li; Chunlei Li; Tor Helleseth et al. (2014). Optimal ternary cyclic codes with minimum distance four and five. (external link)
• Håvard Molland; Tor Helleseth (2006). Linear properties in T-functions. (external link)
• Geir Jarle Ness; Tor Helleseth; Oleksandr Kholosa (2006). On the correlation distribution of the Coulter-Matthews decimation. (external link)
• Dan Zhang; Matthew Geoffrey Parker; Tor Helleseth (2019). Polyphase Zero Correlation Zone Sequences from Generalised Bent Functions. (external link)
• Tor Helleseth; Dilip Sarwate; Hong-yeop Song et al. (2005). Preface. (external link)
• N. Hamada; Tor Helleseth (1995). Construction of some optimal ternary linear codes and the uniqueness of @<294,6,195:3@>-codes meeting the Griesmer bound. (external link)
• N. Hamada; Tor Helleseth (1995). A characterization of some @(v%b+v%c+2v%d,v%a+v%b+2v%c;4,3@)-minihypers and some @<90,5,59:3@>-codes meeting the Griesmer bound. (external link)
• P. Vijay Kumar; Tor Helleseth; A. R. Calderbank (1995). An Upper Bound for Weil Exponential Sums over Galois Rings and Applications. (external link)
• Tor Helleseth; Alexander Kholosa (2008). On the equation x(2l+1)+x+a=0 over GF(2(k)). (external link)
• Young-Sik Kim; Ji-Woong Jang; Jong-Seon No et al. (2004). New constructions of p-ary bent sequences. (external link)
• Yongbo Xia; Shaoping Chen; Tor Helleseth et al. (2014). Cross-correlation between a p-ary m-sequence and its all decimated sequences for d = (pm+1)(pm+p-1)/p+1. (external link)
• N. Hamada; Tor Helleseth (1993). The nonexistence of @<51,5,33;3@>-codes. (external link)
• Tor Helleseth; Lei Hu; Alexander Kholosa et al. (2009). Period-different m-sequences with at most four-valued cross correlation. (external link)
• N. Hamada; Tor Helleseth (1993). A characterization of some q-ary codes (GF(q),q>(h-1)%2,h@Z3). (external link)
• Tor Helleseth; Alexander Kholosa (2016). New ternary binomial bent functions. (external link)
• Haode Yan; Yongbo Xia; Chunlei Li et al. (2022). The Differential Spectrum of the Power Mapping x^pn^-3. (external link)
• Minjia Shi; Liqin Qian; Tor Helleseth et al. (2023). Five-weight codes from three-valued correlation of M-sequences. (external link)
• Minjia Shi; Hongwei Zhu; Tor Helleseth (2023). The Connections Among Hamming Metric, b-Symbol Metric, and r-th Generalized Hamming Metric. (external link)
• D.J. Shin; P. V. Kumar; Tor Helleseth (2003). 3-Designs from the $Z_4$ Goethals codes via a new Kloosterman sum identity. (external link)
• Tor Helleseth; N. Hamada (1992). A characterization of some linear codes over GF(4) meeting the Griesmer bound. (external link)
• Mehdi Hassanzadeh; Tor Helleseth (2010). Security Analysis of the Step (D,K) Generator Respect to its Parameters. (external link)
• Jinquan Luo; Tor Helleseth (2012). Binary Niho sequences with four-valued cross correlations. (external link)
• K Yang; Tor Helleseth (2003). On the minimum distance of array codes as LDPC codes. (external link)
• Chunlei Li; Tor Helleseth (2016). Quasi-perfect linear codes from planar and APN functions. (external link)
• Gaojun Luo; Xiwang Cao; Minjia Shi et al. (2021). Three New Constructions of Asymptotically Optimal Periodic Quasi-Complementary Sequence Sets With Small Alphabet Sizes. (external link)
• X. Chen; I. S. Reed; Tor Helleseth et al. (1994). General Principles for the Algebraic Decoding of Cyclic Codes. (external link)
• X. Chen; I. Reed; Tor Helleseth et al. (1994). Algebraic decoding of binary cyclic codes: A polynomial point of view. (external link)
• Tor Helleseth; Torleiv Kløve; Øyvind Ytrehus (1994). Generalizations of the Griesmer bound. Error Control, Cryptography and Speech Compression. (external link)
• Sondre Rønjom; Navid Ghaedi Bardeh; Tor Helleseth (2017). Yoyo tricks with AES. (external link)
• Lilya Budaghyan; Tor Helleseth (2008). New perfect nonlinear multinomials over F_p^{2k}}for any odd prime p. (external link)
• Nian Li; Tor Helleseth (2017). Several classes of permutation trinomials from Niho exponents. (external link)
• Chunming Tang; Zhengchun Zhou; Yanfeng Qi et al. (2017). Generic Construction of Bent Functions and Bent Idempotents with Any Possible Algebraic Degrees. (external link)
• Kyeongcheol Yang; Tor Helleseth (1998). Two new infinite families of 3-designs from Kerdock codes over Z<SUB>4</SUB>. (external link)
• Tor Helleseth; P.V. Kumar; Kyeongcheol Yang (1998). An infinite family of 3-designs from Preparta codes over Z<SUB>4</SUB>. (external link)
• Cees J.A. Jansen; Tor Helleseth; Alexander Kholosha (2008). Cascade Jump Controlled Sequence Generator and Pomaranch Stream Cipher. (external link)
• Håvard Molland; John Erik Mathiassen; Tor Helleseth (2004). Improved fast correlation attack using low rate codes. (external link)
• Nian Li; Xiaohu Tang; Tor Helleseth (2015). A class of quaternary sequences with low correlation. (external link)
• Lilya Budaghyan; Tor Helleseth; Nikolay Stoyanov Kaleyski (2020). A New Family of APN Quadrinomials. (external link)
• Tor Helleseth; Torleiv Kløve; Vladimir Levenshtein (2004). The simplex codes and other even-weight binary linear codes for error correction. (external link)
• Tor Helleseth; Alexander Kholosha (2008). $m$-Sequences of Lengths $2^{2k}-1$ and $2^k-1$ with at Most Four-Valued Cross Correlation. (external link)
• Tor Helleseth; Martijn Maas; John Erik Mathiassen et al. (2004). Linear complexity over F_p of Sidel'nikov sequences. (external link)
• Chunming Rong; Tor Helleseth; Jyrki Lahtonen (1999). On Algebraic Decoding of the Z4-Linear Calderbank-McGuire Code. (external link)
• Tor Helleseth; Alexander Kholosa (2011). Crosscorrelation of m-sequences, exponential sums, bent functions and Jacobsthal sums. (external link)
• Kyeongcheol Yang; Tor Helleseth; P. Vijay Kumar et al. (1996). On the Weight Hierarchy of Kerdock Codes over Z%4. (external link)
• Tor Helleseth; Chunming Rong; Kyeongcheol Yang (2001). On t-designs from Codes over Z4. (external link)
• Tor Helleseth; P. Vijay Kumar (1996). On the Weight Hierarchy of the semiprimitive codes. (external link)
• Abhijit G. Shanbag; P. Vijay Kumar; Tor Helleseth (1996). Improved Binary Codes and Sequence Families from Z%4-Linear Codes. (external link)
• Chunming Rong; Tor Helleseth (1996). Use characteristic sets to decode cyclic codes up to actual minimum distance. (external link)
• Ziran Tu; Xiangyong Zeng; Tor Helleseth (2018). New permutation quadrinomials over F22m. (external link)
• Tor Helleseth; Torleiv Kløve (1981). On group-theoretic codes for asymmetric channels. (external link)
• Cunsheng Ding; Tor Helleseth; Harald Niederreiter et al. (2002). The minimum distance of the duals of the binary irreducible codes. (external link)
• KC Yang; Tor Helleseth (2004). On the minimum distance of array codes as LDPC codes. (external link)
• Ilya Boukliev; Tor Helleseth; stefan Dodunekov et al. (1997). On the [162,8,80] codes. (external link)
• Ziran Tu; Xiangyong Zeng; Tor Helleseth (2018). A class of permutation quadrinomials. (external link)
• Nian Li; Tor Helleseth; Xiaohu Tang et al. (2013). Several new classes of bent functions from Dillon exponents. (external link)
• Tor Helleseth; Torleiv Kløve; V. I. Levenshtein et al. (1995). Bounds on the Minimum Support Weights. (external link)
• Qin Yuan; Chunlei Li; Xiangyong Zeng et al. (2024). Further Investigations on Nonlinear Complexity of Periodic Binary Sequences. (external link)
• Iwan Duursma; Tor Helleseth; Chunming Rong et al. (1999). Split weight enumerators for the Preparata Codes with applications to designs. (external link)
• Tor Helleseth; Chunming Rong; Kyeongcheol Yang (1999). New Infinite Families of 3-Designs from Preparata Codes over Z4. (external link)
• Han Cai; Xiangyong Zeng; Tor Helleseth et al. (2013). A New construction of zero-difference balanced functions and its applications. (external link)
• Tor Helleseth; Jyrki Lahtonen; Kalle Ranto (2004). A simple proof to the minimum distance of Z_4-Linear Goethals codes,. (external link)
• Kangquan Li; Chunlei Li; Tor Helleseth et al. (2023). Further investigations on permutation based constructions of bent functions. (external link)
• Tor Helleseth; Johannes Mykkeltveit (2004). A proof of Simmons's; conjecture. (external link)
• Tor Helleseth; Matthew Geoffrey Parker (2003). Logarithm Cartesian Authentication Codes. (external link)
• Yongbo Xia; Nian Li; Xiangyong Zeng et al. (2017). On the correlation distribution for a Niho decimation. (external link)
• Tor Helleseth; Aleksander Kholosa; Geir Jarle Ness (2007). Characterization of m-sequences of length 2^{2k}-1 and 2^k-1 with three-valued crosscorrelation. (external link)
• Tor Helleseth; Torleiv Kløve; Johannes Mykkeltveit (1977). The weight distribution of irreducible cyclic codes with block lengths n_1((q^l-1)/N). (external link)
• Sondre Rønjom; Guang Gong; Tor Helleseth (2007). On attacks on filtering generators using linear subspace structures. (external link)
• A.R. Calderbank; G. McGuire; V. Kumar et al. (1996). Cyclic codes over Z%e, locator polynomials, and Newton's identities. (external link)
• Leonid Bassalygo; Stefan Dodunekov; Tor Helleseth et al. (2006). The Gray-Rankin bound for nonlinear codes. (external link)
• Lilya Budaghyan; Claude Michael Carlet; Tor Helleseth (2019). Special issue on Boolean Functions and Their applications. (external link)
• Tor Helleseth; Oleksandr Kholosa (2006). Monomial and quadratic bent functions over the finite fields of odd characteristic. (external link)
• Zhengchun Zhou; Dan Zhang; Tor Helleseth et al. (2018). A Construction of Multiple Optimal ZCZ Sequence Sets With Good Cross Correlation. (external link)
• Tor Helleseth; P. Vijay Kumar (1995). The weight of the Kasami codes. (external link)
• Xiaohu Tang; Tor Helleseth; Pingzhi Fan (2009). A new optimal quaternary sequence family of length 2(2(n)-1) obtained from the orthogonal transformation of Families B and C. (external link)
• Minjia Shi; Shukai Wang; Tor Helleseth et al. (2021). Quadratic residue codes, rank three groups and PBIBDs. (external link)

Conference lecture

• Tor Helleseth; P. V. Kumar (1994). Algebraic Decoding of the Goethals Code. (external link)
• Noboru Hamada; Tor Helleseth (2001). Codes and minihypers. (external link)
• Tor Helleseth (2001). Sequences with good correlation properties and open problems. (external link)
• P. V. Kumar; Tor Helleseth; A. R. Calderbank et al. (1994). Large families of quaternary sequences with low correlation. (external link)
• Tor Helleseth; P. Vijay Kumar (1995). The Algebraic Decoding of the Z%e-Linear Goethals Code. (external link)
• Xuemin Chen; I. S. Reed; Tor Helleseth (1995). On Gr@øbner Bases of the Error-Locator Ideal of Hermitian Codes. (external link)
• Tor Helleseth; P. Vijay Kumar; Oscar Moreno et al. (1995). Improved Estimates for the Minimum Distance of Weighted Degree Z%e Trace Codes. (external link)
• Tor Helleseth; Victor Zinoview (1998). On the coset weight distributions of the Z<SUB>4</SUB>-linear Goethals codes. (external link)
• Kyeongcheol Yang; Tor Helleseth (1998). Kerdock codes over C<SUB>4</SUB> and their applications to designs. (external link)
• I. Boukliev; S. Dodunekov; Tor Helleseth et al. (1996). Two New Binary Optimal 8-Dimensional Codes. (external link)
• J.W. Jang; J.S. No; Tor Helleseth (2003). New family of p-ary sequences with optimal correlation property and large linear span. (external link)
• P. V. Kumar; Tor Helleseth; A. R. Calderbank (1994). An upper bound for some exponential sums over Galois rings. (external link)
• J.S. No; H Chung; Hong-yeop Song et al. (2000). Balanced and almost balanced binary sequences of period p^m-1 with optimal autocorrelation using the polynomial (x+1)^d+az^d+b over GF(p^m). (external link)
• Tor Helleseth (1998). On the crosscorrelation of <i>m</i>-sequences and related topics. (external link)
• Tor Helleseth; P. V. Kumar; H. M. Martinsen et al. (1998). Correlation distribution of the quaternary Kasami sequences. (external link)
• Tor Helleseth; G Gong (2002). New Nonbinary Sequences with Ideal Two-Level Autocorrelation Function. (external link)
• Tor Helleseth; S.H. Kim; J.S. No (2002). Linear Complexity over F_p and Trace Representation of Lempel-Cohn-Eastman Sequences. (external link)
• Tor Helleseth; Torleiv Kløve; Vladimir Levenshtein (1997). On the information function of an error correcting code. (external link)
• Kyeongcheol Yang; Tor Helleseth (1997). On the Minimum Support Weights of Goethals Codes over Z₄. (external link)
• Y.S. Kim; J.W. Jang; J.S. No et al. (2002). On $p$-ary bent functions defined on finite fields. (external link)
• Tor Helleseth; P. V. Kumar (1994). The weight hierarchy of semiprimitive codes. (external link)
• Tor Helleseth (2001). Correlation of m-sequences and related topics. (external link)
• Tor Helleseth; P. V. Kumar (1994). The weight hierarchy of Kasami codes. (external link)
• Tor Helleseth; Torleiv Kløve; Vladimir Levenshtein (2003). A coset count that proves that the simplex codes are not optimal for error correction. (external link)
• Abhijit G. Shanbhag; P. Vijay Kumar; Tor Helleseth (1995). An Upper Bound for the Aperiodic Correlation of Weighted-Degree CDMA Sequences. (external link)
• Tor Helleseth (2001). Sequences with good correlations and some open problems. (external link)
• Tor Helleseth; Eli Winjum (1995). The Generalized Hamming Weight of Some BCH Codes and Related Codes. (external link)
• Tor Helleseth (2001). Sequences with ideal autocorrelation. (external link)
• Tor Helleseth; Torleiv Kløve; Vladimir Levenshtein (2001). Ordered orthogonal arrays of strength 4 and 5 from double-error-correcting BCH codes. (external link)
• Tor Helleseth; Torleiv Kløve; Øyvind Ytrehus (1992). Codes, weight hierarchies and chains. (external link)
• Tor Helleseth; Victor Zinoviev (2000). On Z_4-linear Goethals codes Kloosterman sums and Dickson polynomials. (external link)
• Tor Helleseth; P. V. Kumar; Halvard Martinsen (2000). A new family of ternary sequences with ideal two-level autocorrelation function. (external link)
• Tor Helleseth; P. V. Kumar; A. G. Shanbhag et al. (1997). On the weight hierarchy of some codes over Z₄. (external link)
• Chunming Rong; Tor Helleseth (1997). The Algebraic Decoding of the Z₄-Linear Calderbank-McGuire Code. (external link)
• Tor Helleseth (2002). Pairs of $M$-sequences with a six-valued crosscorrelation. (external link)
• Hans Georg Schaathun; Tor Helleseth (2003). Separating and intersectiong properties of BCH and Kasami codes. (external link)
• Tor Helleseth; Torleiv Kløve; Vladimir Levenshtein (2003). Error-correction capability of binary linear codes. (external link)
• Tor Helleseth; Torleiv Kløve; Vladimir Levenshtein (2003). Error-correction capability of binary linear codes. (external link)
• Abhijit G. Shanbhag; P. Vijay Kumar; Tor Helleseth (1995). An Upper Bound for the Extended Kloosterman Sums over Galois Rings. (external link)
• Tor Helleseth; Torleiv Kløve; Vladimir Levenshtein (2003). The simplex codes are not optimal for binary symmetric channels. (external link)
• Nabour Hamada; Tor Helleseth (1995). A characterization of @(3v%b + v%e,3v%a + v%d;4,3@)-minihypers and projective ternary @<78,5,51@> codes. (external link)
• Nabour Hamada; Tor Helleseth (1995). The nonexistence of ternary @<270,6,179@> codes and @<309,6,205@> codes. (external link)
• Tor Helleseth; P. Vijay Kumar (1995). A New Proof of the Minimum Distance of the Quaternary Preparato Code and Goethals Code. (external link)
• Tor Helleseth; Chunming Rong; Kyeongcheol Yang (1998). Some 3-designs from Goethals codes over Z<SUB>4</SUB>. (external link)
• Tor Helleseth; N. Hamada; Øyvind Ytrehus (1991). A new class of nonbinary codes meeting the Griesmer bound. (external link)
• Tor Helleseth; N. Hamada (1992). On the construction of @<q%3 - q%2 + 1,4,q%3 -2q%2 + q;q@> - codes meeting the Griesmer bound. (external link)
• Tor Helleseth; Torleiv Kløve; Vladimir Levenshtein (1996). The Newton radius of equidistant codes. (external link)
• Tor Helleseth (1993). A charavterization of some tenary codes meeting the Grismer bound. (external link)
• P. V. Kumar; Tor Helleseth (1997). An Expansion for the Coordinates of the Trace Function over Galois Rings. (external link)
• Kyeongcheol Yang; Tor Helleseth (1997). On the Generalized Hamming Weights for Preparata Codes over Z₄. (external link)
• Håvard Molland; Jon Erik Mathiassen; Tor Helleseth (2003). Improved fast correlation attack using low rate codes. (external link)
• Tor Helleseth; Torleiv Kløve; Vladimir Levenshtein (2003). Bounds on error-correction capability of codes beyond half the minimum distance. (external link)
• Tor Helleseth; P. Vijay Kumar; Abhijit G. Shanbhag (1995). New Codes with the Same Weight Distributions as the Coethals Codes and the Delsarte-Goethals Codes. (external link)
• N. Hamada; Tor Helleseth (1993). A characterization of some temary codes meeting the Grismer bound. (external link)
• Tor Helleseth (2000). On some ternary m-sequences with good autocorrelation and crosscorrelation. (external link)
• Tor Helleseth; Torleiv Kløve; Øyvind Ytrehus (1992). Codes and the chain condition. (external link)
• Hans Dobbertin; Tor Helleseth; P. V. Kumar et al. (2000). Ternary m-sequences with three-valued crosscorrelation function: two new decimations. (external link)
• Tor Helleseth; Thomas Johansson (1996). Universal Hash Functions from Exponential Sums over Finite Fields and Galois Rings. (external link)
• J.S. No; D.J. Shin; Tor Helleseth (2002). On the p-ranks and Characteristic Polynomials of Cyclic Difference Sets. (external link)
• E.R Hauge; Tor Helleseth (1993). DeBruijn sequences, Irreducible Codes and Cyclotomy. (external link)

Academic book chapter

• Pascale Charpin; Tor Helleseth; Victor Zinoviev (2004). On binay BCH codes with minimal distance 8 and Kloosterman sums. (external link)
• Pascale Charpin; Tor Helleseth; Victor Zinoviev (2005). Coset distribution of triple-error-correcting binary primitive BCH codes. (external link)
• Tor Helleseth; Torleiv Kløve (2009). Algebraic Coding Theory. (external link)
• Lilya Budaghyan; Claude Carlet; Tor Helleseth (2011). On bent functions associated to AB functions. (external link)
• Jinquan Luo; Tor Helleseth (2012). Binary Niho sequences with four-valued cross correlations. (external link)
• Tor Helleseth; Sondre Rønjom (2011). Simplifying algebraic attacks with univariate analysis. (external link)
• Tor Helleseth (2006). Optical orthogonal codes. (external link)
• Mehdi Hassanzadeh; Tor Helleseth (2010). Algebraic Attack on the Second class of Modified Alternating k-Generators. (external link)
• Tor Helleseth; John Erik Mathiassen; Martijn Maas et al. (2004). Linear complexity over F_p of Sidelnikov sequences. (external link)
• Tor Helleseth; Torleiv Kløve; Vladimir Levenshtein (2006). A bound for codes with given minimum and maximum distance. (external link)
• Tor Helleseth; Øyvind Ytrehus (2013). Personnummerering i Norge: Litt anvendt kodeteori og økonomi. (external link)
• Tor Helleseth; Alexander Kholosa (2010). New binomial bent functions over the finite fields of odd characteristic. (external link)
• Tor Helleseth (2006). Sequence correlation. (external link)
• Lilya Budaghyan; Tor Helleseth; Nian Li et al. (2017). Some Results on the Known Classes of Quadratic APN Functions. (external link)
• Mehdi Hassanzadeh; Tor Helleseth (2010). Algebraic attack on the alternating step(r,s) generator. (external link)
• Tor Helleseth; Alexander Kholosha; Aina Johansen (2008). m-Sequences of different lengths with four-valued cross correlation. (external link)
• Tor Helleseth; K Yang (2001). On binary sequences of period p^m-1 with optimal autocorrelation. (external link)
• Pascale Charpin; Tor Helleseth; Victor Zinoviev (2007). On binary primitive BCH codes with minimum distance 8 and exponential sums. (external link)
• Lilya Budaghyan; Claude Carlet; Tor Helleseth et al. (2012). Generalized bent functions and their relation to Maiorana-McFarland class. (external link)
• Chunlei Li; Tor Helleseth (2012). New nonbinary sequence families with low correlation and large linear span. (external link)
• Tor Helleseth; Jyrki Lahtonen; Petri Rosendahl (2004). On certain equations over finite fields and cross-correlation of m-sequences. (external link)
• Guang Gong; Tor Helleseth; Honggang Hu et al. (2012). New Three-Valued Walsh Transforms from Decimations of Helleseth-Gong Sequences. (external link)
• Tor Helleseth; P. V. Kumar (1998). Sequences with low correlation. Chapter 21. (external link)
• Mehdi Hassanzadeh; Y. E. Salehani; M.R.S. Abyaneh et al. (2008). Differential distinguishing attack on the Shannon stream cipher based on fault analysis. (external link)
• Tor Helleseth (2009). Cross-correlation of M-sequences, Exponential Sums and Dickson Polynomials. (external link)
• Gagan Garg; Tor Helleseth; Vijay Kumar (2009). Recent Advances in Low-Correlation Sequences. (external link)
• Tor Helleseth; Alexander Kholosa (2010). On Generalized bent functions. (external link)
• Nian Li; Xiaohu Tang; Tor Helleseth (2012). New classes of generalized boolean bent functions over Z4. (external link)
• Jinquan Luo; Tor Helleseth; Alexander Kholosa (2011). Two nonbinary sequences with six-valued cross correlation. (external link)
• Mehdi Hassanzadeh; Tor Helleseth (2010). Algebraic attack on the more generalized clock-controlled alternating step generator. (external link)
• Stefan Dodunekov; Tor Helleseth; Victor Zinoviev (2004). On q-ary Grey-Rankin bound and codes meeting this bound. (external link)
• Tor Helleseth; N. Hamada (1992). A characterization of some minihypers and codes meeting the Griesmer bound over GF(q),q >9. (external link)
• Tor Helleseth; Oleksandr Kholosa; Geir Jarle Ness (2005). On the correlation distribution of the Coulter-Matthews decimation. (external link)
• Tor Helleseth; Alexander Kholosa (2010). Sequences, bent functions and Jacobstahl sums. (external link)
• Tor Helleseth; Gohar Kyureghyan; Geir Jarle Ness et al. (2008). On a family of perfect nonlinear polynomials. (external link)
• Pascale Charpin; Tor Helleseth; Victor Zinoviev (2008). Divisibility properties of Kloosterman sums over finite fields of characteristic two. (external link)
• Aina Johansen; Tor Helleseth (2008). Crosscorrelation of m-sequences with decimation d = (p^l + 1)/(p^k + 1). (external link)
• Tor Helleseth; P.V. Kumar (1996). Pseudonoise Sequences. (external link)
• Tor Helleseth (2001). On the crosscorrelation of m-sequences and related sequences with ideal autocorrelation. (external link)
• Carl Bracken; Tor Helleseth (2009). Triple-Error-Correcting BCH-Like Codes. (external link)
• Håvard Molland; Tor Helleseth (2005). A linear weakness in the Klimov-Shamir T-function. (external link)
• Claude Carlet; Tor Helleseth; Alexander Kholosa et al. (2011). On the dual of bent functions with 2^r Niho exponents. (external link)
• Leonid Bassalygo; Stefan Dodunekov; Tor Helleseth et al. (2006). On a new q-ary combinatorial analog of the Grey-Rankin bound and codes meeting this bound. (external link)
• Y.s. Kim; J.w. Jang; Jong-seon No et al. (2004). New p-ary bent sequences. (external link)
• Tor Helleseth; N. Hamada (1992). On a characterization of some minihypers in PG(t,q) (q=3 or 4) and its applications to error-correcting codes. (external link)
• Tor Helleseth; Oleksandr Kholosa (2005). New monomial bent functions over the finite fields of odd characteristic. (external link)
• Geir Jarle Ness; Tor Helleseth (2006). Three-Valued Crosscorrelation Between m-Sequences of Different Lengths. (external link)
• Tor Helleseth; Michal Hojsik; Sondre Rønjom (2009). Algebraic Attacks on Filter and Combiner Generator. (external link)

Research report

• Tor Helleseth; Torleiv Kløve; Øyvind Ytrehus (1992). Excess sequences of codes and the chain condition. (external link)
• Tor Helleseth (1974). Some properties of the weight distribution of crosscorrelation function between two maximal linear sequences. (external link)
• Tor Helleseth; Øyvind Ytrehus (1986). New bounds on the minimum lenght of binary block codes of dimension 8. (external link)
• Chunming Rong; Tor Helleseth; Jyrki Lahtonen (1998). Decoding the Z4-linear Calderbank-McGuire code upto its minimum Lee distance. (external link)
• Tor Helleseth; Torleiv Kløve; Øyvind Ytrehus (1993). On generalizations of the Grismer bound. (external link)
• Tor Helleseth; Chunming Rong; Kyeongcheol Yang (1997). A 3 - (2⁵, 7, 105) Design form Goethals Codes over Z₄. (external link)
• Noboru Hamada; Tor Helleseth (1995). Construction of some optimal ternary linear codes and the uniqueness of @<294,6,195:3@>-codes meeting the Griesmer bound. (external link)
• Tor Helleseth; Torleiv Kløve; J. Mykkeltveit (1975). The weight distribution of irreducible cyclic codes with block lengths n_1(q^l-1)/N, part I, general theory. (external link)
• Tor Helleseth; Torleiv Kløve; J. Mykkeltveit (1975). Weight distribution of irreducible cyclic codes with block lengths n_1(q^l-1)/N, part II, some special classes and numerical results. (external link)
• Tor Helleseth (1975). Gaussian sums and the crosscorrelation function between two maximal linear sequences. (external link)
• Tor Helleseth; Øyvind Ytrehus (1989). How to find a 33,8,14Å code. (external link)
• Tor Helleseth; Øyvind Ytrehus (2003). Lecture Notes for the International Mini-workshop: Coding for Kløve. (external link)
• Tor Helleseth; Torleiv Kløve (1997). Abstracts, IEEE Information Theory Workshop, Longyearbyen, July 6-12, 1997. (external link)
• Tor Helleseth; Chunming Rong; Kyeongcheol Yang (1997). New Infinite Families of 3-Designs from Preparata Codes over Z₄. (external link)

Encyclopedia entry

• Tor Helleseth (2005). Auto-correlation. (external link)
• Tor Helleseth (2005). De Bruijn sequence. (external link)
• Tor Helleseth (2011). Cross-correlation. (external link)
• Tor Helleseth (2011). Autocorrelation. (external link)
• Tor Helleseth (2005). Gap. (external link)
• Tor Helleseth (2011). De Bruijn sequence. (external link)
• Tor Helleseth (2011). Maximal-length sequences. (external link)
• Tor Helleseth (2005). Golomb's randomness postulates. (external link)
• Tor Helleseth (2005). Run. (external link)
• Tor Helleseth (2005). Sequences. (external link)
• Tor Helleseth (2011). Run. (external link)
• Tor Helleseth (2011). Gap. (external link)
• Tor Helleseth (2005). Pseudo-random sequence. (external link)
• Tor Helleseth (2005). Cross-correlation. (external link)
• Tor Helleseth; Torleiv Kløve (1999). Algebraic Coding Theory. (external link)
• Tor Helleseth (2011). Pseudo-noise sequences (PN-sequences). (external link)
• Tor Helleseth (2005). Pseudo-noise (PN) sequence. (external link)
• Tor Helleseth (2005). Maximum-length sequence. (external link)
• Tor Helleseth (2011). Golomb's randomness postulates. (external link)
• Tor Helleseth (2011). Sequences. (external link)

Book anthology

• M. Anwar Hasan; Tor Helleseth (2010). Arithmetic of Finite Fields, WAIFI 2010. (external link)
• Tor Helleseth; P. Vijay Kumar; Øyvind Ytrehus (2007). 2007 IEEE Information Theory Workshop on Information Theory for Wireless Networks. (external link)
• Tor Helleseth; Jonathan Jedwab (2012). Sequences and Their Applications - SETA 2012 7th International Conference Waterloo, ON, Canada, June 2012 Proceedings. (external link)
• Lilya Budaghyan; Tor Helleseth; Matthew Geoffrey Parker (2013). Preproceedings, The International Workshop on Coding and Cryptography WCC 2013. (external link)

Editorial/Leader article

• Lilya Budaghyan; Claude Carlet; Tor Helleseth (2019). Special issue on Boolean functions and their applications 2018. (external link)
• Lilya Budaghyan; Claude Carlet; Tor Helleseth et al. (2021). Editorial: Special issue on Boolean functions and their applications 2020. (external link)
• Lilya Budaghyan; Tor Helleseth; Matthew Geoffrey Parker (2014). Editorial: Special issue on coding and cryptography. (external link)
• Lilya Budaghyan; Claude Michael Carlet; Tor Helleseth et al. (2024). Editorial: Special issue on Boolean functions and their applications 2023. (external link)
• Lilya Budaghyan; Claude Carlet; Tor Helleseth et al. (2023). Editorial: Special issue on Boolean functions and their applications, 2022. (external link)
• Tor Helleseth; Wai Ho Mow; Zhengchun Zhou (2020). Editorial: Special issue on sequences and their applications 2018. (external link)
• Cunsheng Ding; Tor Helleseth; Øyvind Ytrehus (2008). Special issue dedicated to Professor Torleiv Kløve for his 65th birthday - Preface. (external link)
• Otokar Grosek; Tor Helleseth; Alexander Kholosa et al. (2010). (Guest Editorial -) Preface (NILCRYPT'10). (external link)
• Tor Helleseth; Bart Preneel (2018). Editorial: Special issue on recent trends in cryptography. (external link)
• Tor Helleseth; Jonathan Jedwab (2014). Special issue editorial: Sequences and their applications. (external link)
• Lilya Budaghyan; Claude Carlet; Tor Helleseth (2019). Editorial: Special Issue on Boolean functions and their applications. (external link)
• Lilya Budaghyan; Tor Helleseth; Alexander Kholosa (2016). Editorial: Special issue on Boolean functions and their applications. (external link)
• Lilya Budaghyan; Claude Michael Carlet; Cunsheng Ding et al. (2022). Editorial: Special issue on Boolean functions and their applications 2021: This special issue is dedicated to the 50th birthday of Vincent Rijmen. (external link)
• Lilya Budaghyan; Claude Carlet; Tor Helleseth (2019). Editorial: Special issue on Boolean functions and their applications 2018. (external link)

Non-fiction book chapter

• Tor Helleseth; Chunlei Li (2021). Pseudo-Noise Sequences. (external link)

Non-fiction monograph

• Chunming Rong; Tor Helleseth; S. Cohen et al. (1996). Use characteristic sets to decode cyclic codes up to actual minimum distance. (external link)
• Tor Helleseth (1994). Advances in Cryptology - EUROCRYPT'93. Workshop on the Theory and Application of Cryptographic Techniques, May 23-27 1993, Lofthus, Norway: Proceedings. (external link)
• Tor Helleseth; P. V. Kumar; K Yang (2001). Sequences and their applications-SETA'01, Proceedings of SETA'01. (external link)

Lecture

• Tor Helleseth; Torleiv Kløve (1996). Bounds on the weight hierarchies of some product codes. (external link)
• Tor Helleseth (1994). Om ikkebinære koder, et gjennombrudd i kodeteori. (external link)

Letter to the editor

• Pascale Charpin; Tor Helleseth (2008). Editorial: In memory of Hans Dobbertin. (external link)

See a complete overview of publications in Cristin.