World's Best Scientists 2026 revealed!
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Computer Science
Norway
2026
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Mathematics
Norway
2026

D-Index & Metrics

Computer Science

D-Index
56
Citations
11867
World Ranking
4097
National Ranking
8

Mathematics

D-Index
56
Citations
11808
World Ranking
734
National Ranking
3

Research.com Recognitions

  • 2026 - Research.com Computer Science in Norway Leader Award
  • 2026 - Research.com Mathematics in Norway Leader Award
  • 2025 - Research.com Computer Science in Norway Leader Award
  • 2025 - Research.com Mathematics in Norway Leader Award
  • 2023 - Research.com Computer Science in Norway Leader Award
  • 2022 - Research.com Computer Science in Norway Leader Award
  • 1997 - IEEE Fellow For contributions to coding theory and cryptography.

Overview

Tor Helleseth is affiliated with the University of Bergen in Norway and specializes in research primarily within the fields of computer science and engineering. Their scholarly focus spans several key subfields, including artificial intelligence, electrical and electronic engineering, computer networks and communications, computational theory and mathematics, along with discrete mathematics and combinatorics.

The main topics of their research work include coding theory and cryptography, graph theory and CDMA systems, cellular automata and applications, finite group theory research, cryptographic implementations and security, error correcting code techniques, and cooperative communication and network coding.

Frequent publication venues for Tor Helleseth include:

  • IEEE Transactions on Information Theory
  • arXiv (Cornell University)
  • Cryptography and Communications
  • Designs Codes and Cryptography
  • Finite Fields and Their Applications

They have collaborated extensively with several co-authors, notably Chunlei Li, Minjia Shi, Yongbo Xia, Lilya Budaghyan, and Shitao Li.

Representative recent papers include:

  • "The q-Ary Antiprimitive BCH Codes", 2021, IEEE Transactions on Information Theory
  • "Cryptographically strong permutations from the butterfly structure", 2021, Designs Codes and Cryptography
  • "The differential spectrum of a ternary power mapping", 2020, Finite Fields and Their Applications
  • "Binary Linear Codes With Few Weights From Two-to-One Functions", 2021, IEEE Transactions on Information Theory
  • "The Differential Spectrum of the Power Mapping xpn−3", 2022, IEEE Transactions on Information Theory

Tor Helleseth was awarded the IEEE Fellow distinction in 1997 for their contributions to coding theory and cryptography.

Best Publications

  • Advances in Cryptology-Eurocrypt '93

    Tor Helleseth

  • Some results about the cross-correlation function between two maximal linear sequences

    Tor Helleseth

  • Monomial and quadratic bent functions over the finite fields of odd characteristic

    T. Helleseth;A. Kholosha

  • On the linear complexity of Legendre sequences

    Cunsheng Ding;T. Hesseseth;Weijuan Shan

  • Almost difference sets and their sequences with optimal autocorrelation

    K.T. Arasu;C. Ding;T. Helleseth;P.V. Kumar

  • New Generalized Cyclotomy and Its Applications

    Cunsheng Ding;Tor Helleseth

  • The weight distribution of irreducible cyclic codes with block lengths n1((q1−1)N)

    Tor Helleseth;Torleiv KlØve;Johannes Mykkeltveit

  • An upper bound for some exponential sums over Galois rings and applications

    P.V. Kumar;T. Helleseth;A.R. Calderbank

  • Large families of quaternary sequences with low correlation

    P.V. Kumar;T. Helleseth;A.R. Calderbank;A.R. Hammons

  • Linear Codes With Two or Three Weights From Weakly Regular Bent Functions

    Chunming Tang;Nian Li;Yanfeng Qi;Zhengchun Zhou

  • Linear codes with two or three weights from quadratic Bent functions

    Zhengchun Zhou;Nian Li;Cuiling Fan;Tor Helleseth

  • Several classes of binary sequences with three-level autocorrelation

    Cunsheng Ding;T. Helleseth;Kwok Yan Lam

  • Generalized Hamming weights of linear codes

    T. Helleseth;T. Klove;O. Ytrehus

  • New families of almost perfect nonlinear power mappings

    T. Helleseth;C. Rong;D. Sandberg

  • New families of binary sequences with optimal three-level autocorrelation

    Cunsheng Ding;T. Helleseth;H. Martinsen

  • Niho type cross-correlation functions via dickson polynomials and Kloosterman sums

    H. Dobbertin;P. Felke;T. Helleseth;P. Rosendahl

  • A Generic Construction of Cartesian Authentication Codes

    Cunsheng Ding;T. Helleseth;T. Klove;Xuesong Wang

  • On the covering radius of binary codes (Corresp.)

    T. Helleseth;T. Klove;J. Mykkeltveit

  • A New Attack on the Filter Generator

    S. Ronjom;T. Helleseth

  • Sequences and their Applications

    C. Ding;T. Helleseth;H. Niederreiter

  • Algebraic Coding Theory

    Tor Helleseth;Torleiv Kløve

  • Workshop on the theory and application of cryptographic techniques on Advances in cryptology

    Tor Helleseth

Frequent Co-Authors

Cunsheng Ding
Cunsheng Ding Hong Kong University of Science and Technology
Torleiv Kløve
Torleiv Kløve University of Bergen
Guang Gong
Guang Gong University of Waterloo
Xiaohu Tang
Xiaohu Tang Southwest Jiaotong University
P.V. Kumar
P.V. Kumar Indian Institute of Science
P. Vijay Kumar
P. Vijay Kumar Indian Institute of Science
Claude Carlet
Claude Carlet Paris 8 University
Jong-Seon No
Jong-Seon No Seoul National University
Zhengchun Zhou
Zhengchun Zhou Southwest Jiaotong University
Pascale Charpin
Pascale Charpin French Institute for Research in Computer Science and Automation - INRIA

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