CAST-128
Sign in to savethumb|Three rounds of the CAST-128 block cipher In cryptography, CAST-128 (alternatively CAST5) is a symmetric-key block cipher used in a number of products, notably as the default cipher in some versions of GPG and PGP. It has also been approved for Government of Canada use by the Communications Security Establishment. The algorithm was created in 1996 by Carlisle Adams and Stafford Tavares using the CAST design procedure.
Key facts
- Block cipher.name
- CAST-128
- Block cipher.designers
- Carlisle Adams and Stafford Tavares
- Block cipher.publish date
- 1996
- Block cipher.derived to
- CAST-256
- Block cipher.key size
- 40 to 128 bits
- Block cipher.block size
- 64 bits
- Block cipher.structure
- Feistel network
- Block cipher.rounds
- 12 or 16
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thumb|Three rounds of the CAST-128 block cipher In cryptography, CAST-128 (alternatively CAST5) is a symmetric-key block cipher used in a number of products, notably as the default cipher in some versions of GPG and PGP. It has also been approved for Government of Canada use by the Communications Security Establishment. The algorithm was created in 1996 by Carlisle Adams and Stafford Tavares using the CAST design procedure.
Another member of the CAST family of ciphers, CAST-256 (a former AES candidate) was derived from CAST-128. According to some sources, the CAST name is based on the initials of its inventors, though Bruce Schneier reports the authors' claim that "the name should conjure up images of randomness".