http://www.rfc-editor.org/rfc/rfc3560.txt
RFC 3560: Use of the RSAES-OAEP Key Transport Algorithm in Cryptographic Message Syntax (CMS), R. Housley2003-07-01T23:00:00-00:00This document describes the conventions for using the RSAES-OAEP key transport algorithm with the Cryptographic Message Syntax (CMS). The CMS specifies the enveloped-data content type, which consists of an encrypted content and encrypted content-encryption keys for one or more recipients. The RSAES-OAEP key transport algorithm can be used to encrypt content-encryption keys for intended recipients. [STANDARDS-TRACK]