Description
While CMS is a general framework for digitally signing documents such as E-Mail(S/MIME) or PDF, CAdES specifies precise profiles of CMS signed data for use with advanced electronic signature in the meaning of European Union Directive 1999/93/EC.
One important benefit from CAdES is that electronically signed documents can remain valid for long periods, even if underlying cryptographic algorithms are broken.
The main document describing the format is ETSI TS 101 733 Electronic Signature and Infrastructure (ESI) – CMS Advanced Electronic Signature (CAdES).
The first issue of this TS is V1.2.2 (2000-12), the latest is V1.8.3 (2011-01). This ETSI TS V.1.7.4 (2008-07) is technically equivalent to RFC 5126.
RFC 5126 document builds on existing standards that are widely adopted. These includes
- RFC 3852 : "Cryptographic Message Syntax (CMS)"
- ISO/IEC 9594-8/ITU-T Recommendation X.509 "Information technology - Open Systems Interconnection - The Directory: Authentication framework"
- RFC 3280 "Internet X.509 Public Key Infrastructure (PKIX) Certificate and Certificate Revocation List (CRL) Profile"
- RFC 3161 "Internet X.509 Public Key Infrastructure Time-Stamp Protocol (TSP)".
Read more about this topic: CAd ES (computing)
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