BEAR and LION Cipher

From Wikipedia, the free encyclopedia

The BEAR and LION block ciphers were invented by Ross Anderson and Eli Biham by combining a stream cipher and a cryptographic hash function. The algorithms use a very large variable block size, on the order of 2¹³ to 2²³ bits or more. It is a 3 round generalized Feistel cipher, using the hash function twice with independent keys and the stream cipher once as round functions. The inventors proved that an attack that recovers the key would break both the stream cipher and the hash.

[edit] See also

LION (cipher)

[edit] References

Ross Anderson and Eli Biham. "Two Practical and Provably Secure Block Ciphers: BEAR and LION" (PDF). Retrieved on 2007-01-13.

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