Re: [Cfrg] Request For Comments: OCB Internet-Draft
Simon Josefsson <simon@josefsson.org> Thu, 14 July 2011 08:00 UTC
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From: Simon Josefsson <simon@josefsson.org>
To: Ted Krovetz <ted@krovetz.net>
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Date: Thu, 14 Jul 2011 10:00:44 +0200
In-Reply-To: <22798CA3-3D49-4652-A5DB-EC25ACCD245C@krovetz.net> (Ted Krovetz's message of "Wed, 13 Jul 2011 09:42:21 -0700")
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Cc: cfrg@irtf.org
Subject: Re: [Cfrg] Request For Comments: OCB Internet-Draft
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Ted Krovetz <ted@krovetz.net> writes: > I have just submitted an internet-draft for OCB to the IETF. > > http://datatracker.ietf.org/doc/draft-krovetz-ocb > > I'd appreciate any comments you may have on how to make the draft better. It would help if you explained (in the security considerations) what happens if a nonce is repeated. The question of failure modes of authenticated encryption modes has come up in several different contexts. It turns out that different AEAD modes have different failure properties. In particular, you want to address whether repeat of a nonce leads to immediate key disclosure, or whether the key can be found after some computation faster than obvious attacks, or whether it can only lead to recovery of the plaintext, and/or whether it depends on the plaintext as well (e.g., something interesting happens if the plaintexts are related). > There are several patents that may apply to OCB. We are in the process > of trying to get all parties to pool their patents and liberalize > their use. Which patents? According to the patent disclosure search, only these have been disclosed: https://datatracker.ietf.org/ipr/559/ https://datatracker.ietf.org/ipr/560/ If you are aware of other patents (or applications) that applies, it would help if you send in a patent disclosure about it. Thanks, /Simon
- [Cfrg] Request For Comments: OCB Internet-Draft Ted Krovetz
- Re: [Cfrg] Request For Comments: OCB Internet-Dra… Peter Gutmann
- Re: [Cfrg] Request For Comments: OCB Internet-Dra… Simon Josefsson
- Re: [Cfrg] Request For Comments: OCB Internet-Dra… Ted Krovetz
- Re: [Cfrg] Request For Comments: OCB Internet-Dra… Simon Josefsson
- Re: [Cfrg] Request For Comments: OCB Internet-Dra… Ted Krovetz
- Re: [Cfrg] Request For Comments: OCB Internet-Dra… Simon Josefsson
- Re: [Cfrg] Request For Comments: OCB Internet-Dra… Paul Hoffman
- Re: [Cfrg] Request For Comments: OCB Internet-Dra… Blumenthal, Uri - 0668 - MITLL
- Re: [Cfrg] Request For Comments: OCB Internet-Dra… Ted Krovetz
- Re: [Cfrg] Request For Comments: OCB Internet-Dra… Jack Lloyd
- Re: [Cfrg] Request For Comments: OCB Internet-Dra… Rose, Greg
- Re: [Cfrg] Request For Comments: OCB Internet-Dra… David McGrew
- Re: [Cfrg] Request For Comments: OCB Internet-Dra… Ted Krovetz
- Re: [Cfrg] Request For Comments: OCB Internet-Dra… Steven Bellovin
- Re: [Cfrg] Request For Comments: OCB Internet-Dra… David McGrew