http://www.rfc-editor.org/rfc/rfc8103.txt
RFC 8103: Using ChaCha20-Poly1305 Authenticated Encryption in the Cryptographic Message Syntax (CMS), R. Housley2017-02-01T23:00:00-00:00This document describes the conventions for using ChaCha20-Poly1305 Authenticated Encryption in the Cryptographic Message Syntax (CMS). ChaCha20-Poly1305 is an authenticated encryption algorithm constructed of the ChaCha stream cipher and Poly1305 authenticator.