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RFC 7539, "ChaCha20 and Poly1305 for IETF Protocols", May 2015

Note: This RFC has been obsoleted by RFC 8439

Source of RFC: IRTF
See Also: RFC 7539 w/ inline errata

Errata ID: 4700
Status: Verified
Type: Technical
Publication Format(s) : TEXT
Reported By: Martin Thomson
Date Reported: 2016-05-24
Verifier Name: Lars Eggert
Date Verified: 2016-06-08

Section 2.8 says: 

    The output from the AEAD is twofold:

   o  A ciphertext of the same length as the plaintext.
   o  A 128-bit tag, which is the output of the Poly1305 function.

It should say:

    The output from the AEAD is the concatenation of:

   o  A ciphertext of the same length as the plaintext.
   o  A 128-bit tag, which is the output of the Poly1305 function.

Notes:

Section 2.1 of RFC 5116 defines the AEAD interface, and that interface produces a single output, C (or an error).

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