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

D-Index & Metrics

Mathematics

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

Computer Science

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

Tor Helleseth publication distribution in Mathematics in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Mathematics in 2026. The highlighted bar marks where Tor Helleseth sits on this spectrum.

42–46 publications: 3 scientists 47–51 publications: 5 scientists 52–56 publications: 7 scientists 57–61 publications: 20 scientists 62–66 publications: 14 scientists 67–71 publications: 25 scientists 72–76 publications: 19 scientists 77–81 publications: 35 scientists 82–86 publications: 50 scientists 87–91 publications: 60 scientists 92–96 publications: 86 scientists 97–101 publications: 84 scientists 102–106 publications: 83 scientists 107–111 publications: 90 scientists 112–116 publications: 99 scientists 117–121 publications: 90 scientists 122–126 publications: 91 scientists 127–131 publications: 109 scientists 132–136 publications: 110 scientists 137–141 publications: 98 scientists 142–146 publications: 112 scientists 147–151 publications: 102 scientists 152–156 publications: 88 scientists 157–161 publications: 106 scientists 162–166 publications: 83 scientists 167–171 publications: 102 scientists 172–176 publications: 77 scientists 177–181 publications: 81 scientists 182–186 publications: 78 scientists 187–191 publications: 71 scientists 192–196 publications: 92 scientists 197–201 publications: 64 scientists 202–206 publications: 69 scientists 207–211 publications: 64 scientists 212–216 publications: 62 scientists 217–221 publications: 58 scientists 222–226 publications: 53 scientists 227–231 publications: 50 scientists 232–236 publications: 46 scientists 237–241 publications: 46 scientists 242–246 publications: 46 scientists 247–251 publications: 43 scientists 252–256 publications: 29 scientists 257–261 publications: 45 scientists 262–266 publications: 30 scientists 267–271 publications: 33 scientists 272–276 publications: 34 scientists 277–281 publications: 30 scientists 282–286 publications: 31 scientists 287–291 publications: 21 scientists 292–296 publications: 34 scientists 297–301 publications: 26 scientists 302–306 publications: 10 scientists 307–311 publications: 17 scientists 312–316 publications: 23 scientists 317–321 publications: 13 scientists 322–326 publications: 16 scientists 327–331 publications: 26 scientists 332–336 publications: 13 scientists 337–341 publications: 13 scientists 342–346 publications: 16 scientists 347–351 publications: 17 scientists 352–356 publications: 12 scientists 357–361 publications: 18 scientists 362–366 publications: 18 scientists 367–371 publications: 9 scientists 372–376 publications: 11 scientists 377–381 publications: 8 scientists 382–386 publications: 8 scientists 387–391 publications: 9 scientists 392–396 publications: 9 scientists 397–401 publications: 8 scientists 402–406 publications: 11 scientists 407–411 publications: 6 scientists 412–416 publications: 6 scientists 417–421 publications: 9 scientists 422–426 publications: 8 scientists 427–431 publications: 5 scientists 432–436 publications: 8 scientists 437–441 publications: 8 scientists 442–446 publications: 4 scientists 447–451 publications: 4 scientists 452–456 publications: 4 scientists 457–461 publications: 2 scientists 462–466 publications: 2 scientists 467–471 publications: 4 scientists 472–476 publications: 3 scientists 477–481 publications: 3 scientists 482–486 publications: 6 scientists 487–491 publications: 3 scientists 492–496 publications: 5 scientists 497–501 publications: 5 scientists 502–506 publications: 1 scientists 507–511 publications: 6 scientists 512–516 publications: 4 scientists 517–521 publications: 1 scientists 522–526 publications: 3 scientists 527–531 publications: 1 scientists 532–536 publications: 4 scientists 537+ publications: 100 scientists
42 publications 537+

This scientist: 421 publications — 95th percentile

95% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 537 publications or more.

Tor Helleseth D-index placement in Mathematics in 2026

The chart shows the D-index (discipline H-index) distribution of Mathematics scientists ranked by Research.com in 2026. The highlighted bar marks where Tor Helleseth sits on this spectrum.

30 D-Index: 174 scientists 31 D-Index: 151 scientists 32 D-Index: 174 scientists 33 D-Index: 117 scientists 34 D-Index: 136 scientists 35 D-Index: 127 scientists 36 D-Index: 145 scientists 37 D-Index: 153 scientists 38 D-Index: 150 scientists 39 D-Index: 150 scientists 40 D-Index: 138 scientists 41 D-Index: 136 scientists 42 D-Index: 93 scientists 43 D-Index: 108 scientists 44 D-Index: 115 scientists 45 D-Index: 112 scientists 46 D-Index: 103 scientists 47 D-Index: 75 scientists 48 D-Index: 59 scientists 49 D-Index: 67 scientists 50 D-Index: 60 scientists 51 D-Index: 57 scientists 52 D-Index: 59 scientists 53 D-Index: 62 scientists 54 D-Index: 60 scientists 55 D-Index: 50 scientists 56 D-Index: 42 scientists 57 D-Index: 54 scientists 58 D-Index: 50 scientists 59 D-Index: 42 scientists 60 D-Index: 41 scientists 61 D-Index: 35 scientists 62 D-Index: 40 scientists 63 D-Index: 21 scientists 64 D-Index: 31 scientists 65 D-Index: 27 scientists 66 D-Index: 29 scientists 67 D-Index: 19 scientists 68 D-Index: 25 scientists 69 D-Index: 17 scientists 70 D-Index: 18 scientists 71 D-Index: 12 scientists 72 D-Index: 14 scientists 73 D-Index: 13 scientists 74 D-Index: 18 scientists 75 D-Index: 9 scientists 76 D-Index: 11 scientists 77 D-Index: 10 scientists 78 D-Index: 9 scientists 79 D-Index: 16 scientists 80 D-Index: 12 scientists 81 D-Index: 10 scientists 82 D-Index: 5 scientists 83 D-Index: 5 scientists 84 D-Index: 13 scientists 85 D-Index: 6 scientists 86+ D-Index: 99 scientists
30 D-Index 86+

This scientist: 56 D-Index — 80th percentile

80% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 86 D-Index or more.

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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