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RFC 7539: ChaCha20 and Poly1305 for IETF Protocols

Last modified: 2026-10-23

URL: https://datatracker.ietf.org/doc/html/rfc7539

Summary

IETF RFC (2015, since obsoleted by RFC 8439) specifying the ChaCha20 stream cipher, the Poly1305 authenticator and their AEAD combination. Referenced in the e-ID project notes as one of the standard symmetric primitives available to wallet and protocol implementations.