Increase effective epoch width to 64 bits, keeping the serialized representation 16 bits wide

tlswg / dtls13-spec

Repo for DTLS 1.3

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Increase effective epoch width to 64 bits, keeping the serialized representation 16 bits wide #255

Closed chris-wood closed 2 years ago

chris-wood commented 3 years ago

Yet another alternative to #249.

cc @emanjon @hannestschofenig

ekr commented 3 years ago

This seems like the right change (modulo analysis) but I think the use of the term "effective" is a mistake. We already carry a truncated epoch in DTLSCiphertext, so I think all that's needed is to say that the epoch field in DTLSPlaintext is also truncated but that the actual epoch is 64 bits.

chris-wood commented 3 years ago

so I think all that's needed is to say that the epoch field in DTLSPlaintext is also truncated but that the actual epoch is 64 bits.

Dropped "effective," so the current PR should reflect this. 👍

chris-wood commented 2 years ago

Based on IETF 112, closing in favor of #257.