http://www.rfc-editor.org/rfc/rfc5083.txt
RFC 5083: Cryptographic Message Syntax (CMS) Authenticated-Enveloped-Data Content Type, R. Housley2007-11-01T23:00:00-00:00This document describes an additional content type for the Cryptographic Message Syntax (CMS). The authenticated-enveloped-data content type is intended for use with authenticated encryption modes. All of the various key management techniques that are supported in the CMS enveloped-data content type are also supported by the CMS authenticated-enveloped-data content type. [STANDARDS-TRACK]