NIST's Crypto Publication Review Board announced the review of SP 800-38D, Recommendation for Block Cipher Modes of Operation: Galois/Counter Mode (GCM) and GMAC (2007) in August 2021. In response, NIST received public comments.
NIST proposes revising SP 800-38D to address many of the technical and editorial suggestions in the public comments, such as the following:
- to remove support for authentication tags whose lengths are less than 96 bits,
- to clarify that the construction of initialization vectors (IVs) for GCM in the Transport Layer Security (TLS) 1.3 protocol is approved,
- to clarify the guidance in connection with the IV constructions, and
- to update the references.
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