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Hellman, M. and Langford, S. (1994) Differential-Linear Cryptanalysis. In: Desmedt, Y., Ed., Advances in Cryptology: CRYPTO’94, Springer, Berlin, 26-39.

has been cited by the following article:

  • TITLE: A Review of Existing 4-Bit Crypto S-Box Cryptanalysis Techniques and Two New Techniques with 4-Bit Boolean Functions for Cryptanalysis of 4-Bit Crypto S-Boxes*

    AUTHORS: Sankhanil Dey, Ranjan Ghosh

    KEYWORDS: Linear Cryptanalysis, Differential Cryptanalysis, Substitution Boxes, S-Boxes, Cryptography, Cryptanalysis

    JOURNAL NAME: Advances in Pure Mathematics, Vol.8 No.3, March 22, 2018

    ABSTRACT: 4-bit linear relations play an important role in cryptanalysis of 4-bit crypto S-boxes. 4-bit finite differences have also been a major part of cryptanalysis of 4-bit S-boxes. Existence of all 4-bit linear relations have been counted for all of 16 input and 16 output 4-bit bit patterns of 4-bit Crypto S-boxes said as S-boxes has been reported in Linear Cryptanalysis of 4-bit S-boxes. Count of existing finite differences from each element of output S-boxes to distant output S-boxes have been noted in Differential Cryptanalysis of S-boxes. In this paper a brief review of these two cryptanalytic methods for 4-bit S-boxes has been introduced in a very lucid and conceptual manner. Two new analysis techniques, one to search for the existing linear approximations among the input vectors (IPVs) and output Boolean functions (BFs) of a particular S-box has also been introduced in this paper. The search is limited to find the existing linear relations or approximations in the contrary to count the number of existent linear relations among all 16, 4-bit input and output bit patterns within all possible linear approximations. Another is to find number of balanced BFs in difference output S-boxes. Better the number of Balanced BFs, Better the security.