|Title:||Cryptanalysis of Ladder-DES
|Abstract:||Feistel ciphers are very common and very important in the design and
analysis of blockciphers, especially due to four reasons:
(1)~Many (DES-like) ciphers are based on Feistel's construction.
(2)~Luby and Rackoff proved the security of a four-round Feistel
construction when the round functions are random.
(3)~Recently several provably secure ciphers were suggested, which use
other (assumed secure) ciphers as the round function.
(4)~Other such ciphers use this construction as attempts to improve the
security of other ciphers (e.g., to improve the security of DES).
In this paper we cryptanalyze Ladder-DES, a four-rounds Feistel cipher using DES in the round function, and show that its security is smaller than expected.
|Copyright||The above paper is copyright by the Technion, Author(s), or others. Please contact the author(s) for more information|
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