The ChaCha Stream Cipher for Transport Layer Security

Document Type Replaced Internet-Draft (candidate for tls WG)
Authors Adam Langley  , Wan-Teh Chang  , Nikos Mavrogiannopoulos  , Joachim Strombergson  , Simon Josefsson 
Last updated 2015-10-14 (latest revision 2015-04-03)
Replaced by RFC 7905
Stream Internet Engineering Task Force (IETF)
Intended RFC status Proposed Standard
Expired & archived
pdf htmlized (tools) htmlized bibtex
Stream WG state Call For Adoption By WG Issued
Document shepherd No shepherd assigned
IESG IESG state Replaced by draft-ietf-tls-chacha20-poly1305
Consensus Boilerplate Unknown
Telechat date
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document describes the use of the ChaCha stream cipher with Poly1305 in Transport Layer Security (TLS) and Datagram Transport Layer Security (DTLS) protocols.


Adam Langley (
Wan-Teh Chang (
Nikos Mavrogiannopoulos (
Joachim Strombergson (
Simon Josefsson (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)