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RFC 5116, "An Interface and Algorithms for Authenticated Encryption", January 2008

Source of RFC: IETF - NON WORKING GROUP
Area Assignment: sec

Errata ID: 6415
Status: Reported
Type: Technical
Publication Format(s) : TEXT

Reported By: Jordan Smith
Date Reported: 2021-01-29

Section 3.2 says:

  Implementations
   SHOULD support 12-octet nonces in which the Counter field is four
   octets long.

It should say:

  Implementations
   SHOULD support 12-octet nonces in which the Fixed field is four
   octets long.

Notes:

The ascii diagram given shows the Fixed portion being smaller and the examples given in https://tools.ietf.org/id/draft-mcgrew-iv-gen-01.html also show that the Fixed portion is 4 bytes.

Also an 8 byte counter gives 2^64, where a 4 byte counter would only give 2^32

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