SHACAL

SHACAL-1 (originally simply SHACAL) is a 160-bit block cipher based on SHA-1, and supports keys from 128-bit to 512-bit. SHACAL-2 is a 256-bit block cipher based upon the larger hash function SHA-256.

This article is about the cipher. For the animal, see Jackal. For other uses, see Jackal (disambiguation).
SHACAL
General
DesignersHelena Handschuh, David Naccache
Derived fromSHA-1, SHA-256
Related toCrab
CertificationNESSIE (SHACAL-2)
Cipher detail
Key sizes128 to 512 bits
Block sizes160 bits (SHACAL-1),
256 bits (SHACAL-2)
StructureCryptographic hash function
Rounds80

Both SHACAL-1 and SHACAL-2 were selected for the second phase of the NESSIE project. However, in 2003, SHACAL-1 was not recommended for the NESSIE portfolio because of concerns about its key schedule, while SHACAL-2 was finally selected as one of the 17 NESSIE finalists.

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