R. Housley. <a href="http://www.ietf.org/rfc/rfc3370.txt"><cite>RFC3370: Cryptographic Message Syntax (CMS) Algorithms</cite></a>.  IETF Informational RFC, February 2002. URI: <a href="http://www.ietf.org/rfc/rfc3370.txt">http://www.ietf.org/rfc/rfc3370.txt</a>