http://www.rfc-editor.org/rfc/rfc7192.txt
RFC 7192: Algorithms for Cryptographic Message Syntax (CMS) Key Package Receipt and Error Content Types, S. Turner2014-04-01T23:00:00-00:00This document describes the conventions for using several cryptographic algorithms with the Cryptographic Message Syntax (CMS) key package receipt and error content types. Specifically, it includes conventions necessary to implement SignedData, EnvelopedData, EncryptedData, and AuthEnvelopedData.