Re: [TLS] Consensus for AEAD IV
Russ Housley <housley@vigilsec.com> Fri, 24 April 2015 21:01 UTC
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From: Russ Housley <housley@vigilsec.com>
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Date: Fri, 24 Apr 2015 17:00:26 -0400
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To: Joseph Salowey <joe@salowey.net>
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Cc: IETF TLS <tls@ietf.org>
Subject: Re: [TLS] Consensus for AEAD IV
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Joe: > On Fri, Apr 24, 2015 at 1:00 PM, Martin Thomson <martin.thomson@gmail.com> wrote: > On 24 April 2015 at 10:10, Joseph Salowey <joe@salowey.net> wrote: > > The general consensus on the list seems to prefer to derive "IV" and use it > > to make the AEAD nonce less predictable. Most folks seemed to be OK with > > this approach. In Dallas, there was significant support for using the > > derived "IV" as a per session XOR mask for the counter. If you have > > objections to this approach please respond on the list by May 1, 2015 . > > > You aren't being particularly precise about the process here. > > I believe that these were the two options that were most debated: > > a) nonce = zeroes(N_MIN) XOR counter > b) nonce = HKDF(...., N_MIN) XOR counter > > Did you mean the latter option? > > [Joe] Yes, the later where the quantity XORed with the counter is derived during the handshake. If the computation is done in an HSM-friendly fashion, I am supportive. Russ
- [TLS] Consensus for AEAD IV Joseph Salowey
- Re: [TLS] Consensus for AEAD IV Martin Thomson
- Re: [TLS] Consensus for AEAD IV Joseph Salowey
- Re: [TLS] Consensus for AEAD IV Martin Thomson
- Re: [TLS] Consensus for AEAD IV Russ Housley
- Re: [TLS] Consensus for AEAD IV Michael StJohns
- Re: [TLS] Consensus for AEAD IV Yoav Nir
- Re: [TLS] Consensus for AEAD IV Michael StJohns
- Re: [TLS] Consensus for AEAD IV Ilari Liusvaara
- Re: [TLS] Consensus for AEAD IV Brian Smith
- Re: [TLS] Consensus for AEAD IV Michael StJohns
- Re: [TLS] Consensus for AEAD IV Ilari Liusvaara
- Re: [TLS] Consensus for AEAD IV Michael StJohns
- Re: [TLS] Consensus for AEAD IV Michael StJohns
- Re: [TLS] Consensus for AEAD IV Yoav Nir
- Re: [TLS] Consensus for AEAD IV Michael StJohns
- Re: [TLS] Consensus for AEAD IV Yoav Nir
- Re: [TLS] Consensus for AEAD IV Michael StJohns
- Re: [TLS] Consensus for AEAD IV Yoav Nir
- Re: [TLS] Consensus for AEAD IV Eric Rescorla
- Re: [TLS] Consensus for AEAD IV Nikos Mavrogiannopoulos