Resistance of a CAST-Like Encryption Algorithm to Linear and Differential Cryptanalysis (1997)
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BibTeX
@MISC{Lee97resistanceof,
author = {J. Lee and Howard M. Heys and S. E. Tavares},
title = {Resistance of a CAST-Like Encryption Algorithm to Linear and Differential Cryptanalysis},
year = {1997}
}
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Abstract
Linear cryptanalysis and differential cryptanalysis are two recently introduced, powerful methodologies for attacking private-key block ciphers. In this paper, we examine the application of these two cryptanalysis techniques to a CAST-like encryption algorithm based on randomly generated s-boxes. It is shown that, when randomly generated substitution boxes (s-boxes) are used in a CAST-like algorithm, the resulting cipher is resistant to both the linear attack and the differential attack. 1 Introduction As the need for privacy and authentication is now generally recognized by the telecommunications community, a widely adopted private-key encryption algorithm is becoming an increasingly important objective in the development and analysis of cryptographic algorithms. For some time, the Data Encryption Standard (DES) [16] has been the most widely used and trusted encryption algorithm. However, DES is about twenty years old and has recently become vulnerable to cryptanalysis due to its smal...
