Security Amplification Against Meet-in-the-Middle Attacks Using Whitening

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Provided by: University of Reims Champagne Ardenne
Topic: Security
Format: PDF
In this paper the authors introduce a model for studying meet-in-the-middle attacks on block ciphers, and a simple block cipher construction provably resistant to such attacks in this model. A side-result of this is a proper formalization for an unproven alternative to DESX proposed by the researcher; this construction can now be shown to be sound in their model. Meet-in-the-middle attacks exploit weaknesses in key schedule algorithms, and building constructions resistant to such attacks is an important issue for improving the security of block ciphers.
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