Following the links at the top of the tools.ietf.org interface, you can arrive at the earliest draft of that earlier RFC, which was indeed from January 27, 2014

Following the links at the top of the tools.ietf.org interface, you can arrive at the earliest draft of that earlier RFC, which was indeed from January 27, 2014: https://tools.ietf.org/html/draft-nir-cfrg-chacha20-poly1305-00 https://tools.ietf.org/html/draft-nir-cfrg-chacha20-poly1305...