Shark

Designers:

This is the "Exor" variant of SHARK.

References:

[Def, An] Vincent Rijmen, Joan Daemen, Bart Preneel, Antoon Bosselaers, Erik De Win

• "The Cipher SHARK,"
• SHARK reference implementation (in C),
• [An] Thomas Jakobsen, Lars Knudsen,
• "The Interpolation Attack on Block Ciphers,"
• Proceedings of Fast Software Encryption '97.
• [Test] Wei Dai,
• Crypto++ 3.0, file sharkval.dat
• Key length: 128 bits.
• Block size: 8 bytes.

Security comment:

The Interpolation Attack on Block Ciphers" analyses a "variant of SHARK, which deviates only slightly from the proposed SHARK", reduced to 5 rounds. SHARK normally has 6 rounds.