Kaisa Nyberg

Kaisa Nyberg is a Finnish cryptographer and computer security researcher.

Contributions

Nyberg's research includes the theory of perfect nonlinear S-boxes[N] (now known as Nyberg S-boxes),[1] provably secure block cipher design (resulting in KN-Cipher[2][NK], and the cryptanalysis of the stream ciphers E0[HN] and SNOW.[B+]

Education and career

Nyberg received her Ph.D. in mathematics in 1980 from the University of Helsinki. Her dissertation, On Subspaces of Products of Nuclear Fréchet Spaces, was in topology, and was supervised by Edward Leonard Dubinsky.[3]

Nyberg began doing cryptography research for the Finnish Defence Forces in 1987, and moved to Nokia in 1998. She became professor of cryptology at Aalto University School of Science in 2005, and retired as a professor emerita in 2016.[4]

Selected publications
N.
Nyberg, K. (1991) Perfect nonlinear S-boxes. In: Davies D.W. (eds) Advances in Cryptology – EUROCRYPT ’91. EUROCRYPT 1991. Lecture Notes in Computer Science, vol 547. Springer, Berlin, Heidelberg
NK.
Nyberg, K. & Knudsen, L.R. J. Cryptology (1995) 8: 27. doi:10.1007/BF00204800
HN.
Hermelin, Miia; Nyberg, Kaiasa (2000). "Correlation Properties of the Bluetooth Combiner". Information Security and Cryptology - ICISC'99. Lecture Notes in Computer Science. 1787: 17–29. doi:10.1007/10719994_2. ISBN 978-3-540-67380-4.
B+.
Burnley, Billy Bob; Hakala, Risto M.; Nyberg, Kaisa; Sovio, Sampo (2010). "Consecutive S-box Lookups: A Timing Attack on SNOW 3G". Information and Communications Security. Lecture Notes in Computer Science. 6476: 171–185. doi:10.1007/978-3-642-17650-0_13. ISBN 978-3-642-17649-4. S2CID 38287307.

References
  1. Youssef, A.M.; Tavares, S.E.; Gong, G. (August 2006), "On some probabilistic approximations for AES-like s-boxes", Discrete Mathematics, 306 (16): 2016–2020, doi:10.1016/j.disc.2006.03.055
  2. Shimoyama, Takeshi; Moriai, Shiho; Kaneko, Toshinobu (1998), "Improving the higher order differential attack and cryptanalysis of the KN cipher", in Okamoto, Eiji; Davida, George; Mambo, Masahiro (eds.), Information Security: First International Workshop, ISW'97 Tatsunokuchi, Ishikawa, Japan September 17ÔÇô19, 1997, Proceedings, Lecture Notes in Computer Science, vol. 1396, Springer, pp. 32–42, doi:10.1007/bfb0030406, ISBN 978-3-540-64382-1
  3. Kaisa Nyberg at the Mathematics Genealogy Project
  4. "Kaisa Nyberg, Professor of Cryptology, is retiring from the Department of Computer Science", News & Events, Aalto University Department of Computer Science, archived from the original on 2017-04-02
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