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DUNKELMAN Orr
Improved Meet-in-the-Middle Attacks on Reduced-Round DES
The Data Encryption Standard (DES) is a 64-bit block cipher. Despite its short key size of 56 bits, DES continues to be used to protect financial transactions valued at billions of Euros. In this work, we investigate the strength of DES against attacks that use a limited number of plaintexts and ciphertexts. By mounting meet-in-the-middle attacks on reduced-round DES, we find that up to 6-round DES is susceptible to this kind of attacks. This is joint work with Gautham Sekar and Bart Preneel Discussion about the "Right Model" for cryptanalytic attacks When suggesting a cryptanalytic attack, we try to optimize various parameters:
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