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RFC 7539 - ChaCha20 and Poly1305 for IETF Protocols

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ChaCha20 and Poly1305 for IETF Protocols (RFC 7539, ; obsoleted by RFC 8439)

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RFC 7539: ChaCha20 and Poly1305 for IETF Protocols

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

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IETF Datatracker

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This document defines the ChaCha20 stream cipher as well as the use of the Poly1305 authenticator, both as stand-alone algorithms and as a "combined mode", or Authenticated Encryption with Associated Data (AEAD) algorithm. This document does not introduce any new crypto, but is meant to serve as a stable reference and an implementation guide. It is a product of the Crypto Forum Research Group (CFRG).

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