Vikas Kumar

Publications

Journal Publications

  1. V. Kumar, A. Raya, A. K. Gangopadhyay, and S. Gangopadhyay. “Cryptanalysis of Group Ring NTRU: The Case of the Dihedral Group”. Security and Privacy, 8.2 (2025). Link
  2. V. Kumar, R. Das, and A. K. Gangopadhyay. “GR-NTRU: Dihedral group over ring of Eisenstein integers”. Journal of Information Security and Applications, 83 (2024), p. 103795. DOI
  3. V. Kumar, B. Mandal, and A. K. Gangopadhyay. “On the Gowers U2 and U3 norms of Boolean functions and their restriction to hyperplanes”. Discrete Applied Mathematics, 341 (2023), pp. 4–8. DOI
  4. A. K. Gangopadhyay, V. Kumar, P. Stănică, and S. Gangopadhyay. “Stability of the Walsh–Hadamard spectrum of cryptographic Boolean functions with biased inputs”. Journal of Applied Mathematics and Computing, 69 (2023), pp. 3337–3357. DOI

Conference Publications

  1. A. Raya, V. Kumar, A. K. Gangopadhyay, and S. Gangopadhyay. “Giant Does NOT Mean Strong: Cryptanalysis of BQTRU”. Post-Quantum Cryptography, Springer, 2025, pp. 312–348. DOI
  2. V. Kumar, A. Raya, A. K. Gangopadhyay, S. Gangopadhyay, and M. T. Hussain. “An Efficient Noncommutative NTRU from Semidirect Product”. Progress in Cryptology – INDOCRYPT 2024, Springer, 2025, pp. 3–27. DOI
  3. V. Kumar, A. Raya, A. K. Gangopadhyay, and S. Gangopadhyay. “Dimension Reduction Attack on Noncommutative Group Ring NTRU Over the Dihedral Group”. 1st International Conference On Cryptography And Information Security (VCRIS), 2024, pp. 1–6. DOI
  4. A. Raya, V. Kumar, and S. Gangopadhyay. “DiTRU: A Resurrection of NTRU over Dihedral Group”. Progress in Cryptology - AFRICACRYPT 2024, Springer, 2024, pp. 349–375. DOI
  5. A. Raya, V. Kumar, S. Gangopadhyay, and A. K. Gangopadhyay. “Results on the Key Space of Group-Ring NTRU: The Case of the Dihedral Group”. Security, Privacy, and Applied Cryptography Engineering, Springer, 2024, pp. 1–19. DOI
  6. V. Kumar, B. Mandal, A. K. Gangopadhyay, and S. Gangopadhyay. “Computational Results on Gowers U2 and U3 Norms of Known S-Boxes”. Codes, Cryptology and Information Security, Springer, 2023, pp. 150–157. DOI

Under Communication

  1. A. Raya, V. Kumar, S. Gangopadhyay, and A. K. Gangopadhyay. “Efficient Noncommutative KEMs from Twisted Dihedral Group Ring”. Cryptology ePrint Archive, Paper 2025/795. Link
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