Four Measures of Nonlinearity

Joan Boyar, Magnus Gausdal Find, Rene Peralta

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Abstract

Cryptographic applications, such as hashing, block ciphers and stream ciphers, make use of functions which are simple by some criteria (such as circuit implementations), yet hard to invert almost everywhere. A necessary condition for the latter property is to be "sufficiently distant" from linear, and cryptographers have proposed several measures for this distance. In this paper, we show that four common measures, nonlinearity, algebraic degree, annihilator immunity, and multiplicative complexity, are incomparable in the sense that for each pair of measures, μ 1, μ 2, there exist functions f 1, f 2 with μ 1 (f 1) > μ 1 (f 2) but μ 2(f 1) < μ 2(f 2). We also present new connections between two of these measures. Additionally, we give a lower bound on the multiplicative complexity of collision-free functions.

OriginalsprogEngelsk
TitelAlgorithms and Complexity - 8th International Conference, CIAC 2013, Proceedings : 8th International Conference, CIAC 2013
RedaktørerPaul G. Spirakis, Maria Serna
Antal sider12
ForlagSpringer
Publikationsdato2013
Sider61-72
ISBN (Trykt)978-3642382321
DOI
StatusUdgivet - 2013
BegivenhedInternational Conference on Algorithms and Complexity - Barcelona, Spanien
Varighed: 22. maj 201324. maj 2013
Konferencens nummer: 8

Konference

KonferenceInternational Conference on Algorithms and Complexity
Nummer8
Land/OmrådeSpanien
ByBarcelona
Periode22/05/201324/05/2013
NavnLecture Notes in Computer Science
Vol/bind7878
ISSN0302-9743

Emneord

  • Boolean functions
  • nonlinearity
  • multiplicative complexity
  • algebraic degree
  • annihilator immunity
  • cryptology

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