Cryptographic Message Syntax
Cryptographic Message Syntax ( CMS ; German cryptographic message syntax ) is an IETF standard for secure cryptographic messages.
CMS is the superset of PKCS # 7 (Public-Key Cryptography Standard # 7), which is based on S / MIME . Version 2 was based on the same standard. From version 3 onwards one speaks of cryptographic message syntax . CMS is described in Abstract Syntax Notation One (ASN.1).
The architecture of CMS is based on X.509 encryption or certificates .
Norms and standards
CMS is constantly being developed.
- RFC 2315 - PKCS # 7 Version 1.5 (obsolete).
- RFC 2630 - CMS 1.0, June 1999 (deprecated).
- RFC 3369 - CMS 2.0, August 2002 (deprecated).
- RFC 3852 - CMS 3.0, July 2005 (deprecated).
- RFC 5652 - CMS 4.0, September 2009 (current).
- Jörg Schwenk: Security and Cryptography on the Internet. From secure email to IP encryption. 2nd enlarged and improved edition. Vieweg + Teubner Verlag, Wiesbaden 2005, ISBN 3-8348-0042-2 ( studies ).