CAST

Description Glossary RFCs Publications Obsolete RFCs

Description:

Type:Symmetric block cipher algorithm.
Block size: 64 bits (CAST-128).
128 bits (CAST-256).
Key size: 40 to 128 bits in 8-bit increments (CAST-128).
128, 160, 192, 224 or 256 bits (CAST-256).
URI:
MIME subtype:
SNMP MIBs:
Working groups: smime, S/MIME Mail Security.
Links:

RFC 2144:

The CAST encryption algorithm is a DES-like Substitution-Permutation Network (SPN) cryptosystem which appears to have good resistance to differential cryptanalysis, linear cryptanalysis, and related-key cryptanalysis. This cipher also possesses a number of other desirable cryptographic properties, including avalanche, Strict Avalanche Criterion (SAC), Bit Independence Criterion (BIC), no complementation property, and an absence of weak and semi-weak keys. It thus appears to be a good candidate for general-purpose use throughout the Internet community wherever a cryptographically-strong, freely-available encryption algorithm is required.


Glossary:


RFCs:

[RFC 2144] The CAST-128 Encryption Algorithm.

[RFC 2612] The CAST-256 Encryption Algorithm.

[RFC 2984] Use of the CAST-128 Encryption Algorithm in CMS.


Publications:


Obsolete RFCs:


Description Glossary RFCs Publications Obsolete RFCs