Re: [TLS] Verify data in the RI extension?
Stefan Santesson <stefan@aaa-sec.com> Fri, 27 November 2009 15:00 UTC
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Date: Fri, 27 Nov 2009 16:00:38 +0100
From: Stefan Santesson <stefan@aaa-sec.com>
To: Pasi.Eronen@nokia.com, ynir@checkpoint.com
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Thread-Topic: [TLS] Verify data in the RI extension?
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Subject: Re: [TLS] Verify data in the RI extension?
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Pasi, On 09-11-27 3:09 PM, "Pasi.Eronen@nokia.com" <Pasi.Eronen@nokia.com> wrote: > For simplicity, the current draft is already very simple, and IMHO > it's not clear that continuing to tweak it has a positive return > on investment, considering it delays the publication. It's not a matter of tweaking, This working group discussion has produced 2 proposals. If you count in changes that is about to be applied to Marin's document the following apply: 1) Both proposals agree on the same initial signaling (cipher suite for C->S and empty RI for S->C) 2) For renegotiations: a) Martin's draft propose to update (fix) the Finished calculation and use the same signaling as in 1). b) Eric's draft suggest sending verify_data in RI extensions and keep the old Finished calculation. Many members of this list argue that 2a has better security properties and is simpler to deploy (especially for legacy implementations). The arguments for 2b seems to be that it is "good enough" and "why should we care about old legacy implementations". Now, maybe I'm wrong about that, but wouldn't it at least be fair to ask the working group which approach they prefer? /Stefan
- Re: [TLS] Verify data in the RI extension? Stefan Santesson
- [TLS] Avoiding first use of RI in ClientHello Eric Rescorla
- Re: [TLS] Avoiding first use of RI in ClientHello Stefan Santesson
- Re: [TLS] Avoiding first use of RI in ClientHello Dr Stephen Henson
- Re: [TLS] Avoiding first use of RI in ClientHello Robert Relyea
- Re: [TLS] Avoiding first use of RI in ClientHello Eric Rescorla
- Re: [TLS] Avoiding first use of RI in ClientHello Yngve N. Pettersen (Developer Opera Software ASA)
- Re: [TLS] Avoiding first use of RI in ClientHello peter.robinson
- Re: [TLS] Avoiding first use of RI in ClientHello Min Huang
- Re: [TLS] Verify data in the RI extension? Yoav Nir
- Re: [TLS] Avoiding first use of RI in ClientHello Pasi.Eronen
- Re: [TLS] Avoiding first use of RI in ClientHello Pasi.Eronen
- [TLS] Verify data in the RI extension? Stefan Santesson
- Re: [TLS] Verify data in the RI extension? Stefan Santesson
- Re: [TLS] Avoiding first use of RI in ClientHello Eric Rescorla
- [TLS] Perhaps there's another way. Was: Verify da… Marsh Ray
- Re: [TLS] Perhaps there's another way. Was: Verif… Dr Stephen Henson
- Re: [TLS] Avoiding first use of RI in ClientHello Stefan Santesson
- [TLS] What would be the point of removing signall… David-Sarah Hopwood
- Re: [TLS] Perhaps there's another way. Was: Verif… Marsh Ray
- Re: [TLS] Perhaps there's another way. Was: Verif… Dr Stephen Henson
- Re: [TLS] What would be the point of removing sig… Stefan Santesson
- Re: [TLS] What would be the point of removing sig… Marsh Ray
- Re: [TLS] What would be the point of removing sig… Bodo Moeller
- Re: [TLS] Perhaps there's another way. Was: Verif… Nelson B Bolyard
- Re: [TLS] What would be the point of removing sig… Nelson B Bolyard
- Re: [TLS] What would be the point of removing sig… Stefan Santesson
- Re: [TLS] Verify data in the RI extension? Pasi.Eronen
- Re: [TLS] Verify data in the RI extension? Simon Josefsson
- Re: [TLS] Verify data in the RI extension? Stefan Santesson
- Re: [TLS] Verify data in the RI extension? Pasi.Eronen
- Re: [TLS] Verify data in the RI extension? Pasi.Eronen
- Re: [TLS] Verify data in the RI extension? Martin Rex
- Re: [TLS] Verify data in the RI extension? Nikos Mavrogiannopoulos
- Re: [TLS] Verify data in the RI extension? Stefan Santesson
- Re: [TLS] Verify data in the RI extension? Eric Rescorla
- Re: [TLS] Verify data in the RI extension? Stefan Santesson
- Re: [TLS] Verify data in the RI extension? Eric Rescorla
- Re: [TLS] Verify data in the RI extension? Martin Rex
- Re: [TLS] Verify data in the RI extension? Eric Rescorla
- Re: [TLS] Verify data in the RI extension? Martin Rex
- Re: [TLS] Verify data in the RI extension? Martin Rex
- Re: [TLS] Verify data in the RI extension? Martin Rex
- Re: [TLS] Verify data in the RI extension? Stefan Santesson
- Re: [TLS] Verify data in the RI extension? Eric Rescorla
- Re: [TLS] Verify data in the RI extension? Eric Rescorla
- Re: [TLS] Verify data in the RI extension? Martin Rex
- Re: [TLS] Verify data in the RI extension? Eric Rescorla
- Re: [TLS] Verify data in the RI extension? Martin Rex
- Re: [TLS] Verify data in the RI extension? Martin Rex
- Re: [TLS] Verify data in the RI extension? Pasi.Eronen
- Re: [TLS] Verify data in the RI extension? Martin Rex
- Re: [TLS] Verify data in the RI extension? Eric Rescorla
- Re: [TLS] Verify data in the RI extension? Martin Rex
- Re: [TLS] Verify data in the RI extension? Pasi.Eronen
- Re: [TLS] Avoiding first use of RI in ClientHello Bodo Moeller
- Re: [TLS] Verify data in the RI extension? Bodo Moeller
- Re: [TLS] Verify data in the RI extension? Michael D'Errico
- Re: [TLS] What would be the point of removing sig… David-Sarah Hopwood
- Re: [TLS] What would be the point of removing sig… David-Sarah Hopwood
- Re: [TLS] What would be the point of removing sig… David-Sarah Hopwood
- Re: [TLS] Verify data in the RI extension? David-Sarah Hopwood
- Re: [TLS] Verify data in the RI extension? Michael D'Errico
- Re: [TLS] Verify data in the RI extension? David-Sarah Hopwood
- Re: [TLS] Verify data in the RI extension? Michael D'Errico
- Re: [TLS] Verify data in the RI extension? David-Sarah Hopwood
- Re: [TLS] Verify data in the RI extension? Bodo Moeller
- Re: [TLS] What would be the point of removing sig… Bodo Moeller
- Re: [TLS] Verify data in the RI extension? Michael D'Errico
- Re: [TLS] Verify data in the RI extension? Michael D'Errico
- Re: [TLS] Verify data in the RI extension? David-Sarah Hopwood
- Re: [TLS] Verify data in the RI extension? Marsh Ray
- Re: [TLS] Verify data in the RI extension? Stefan Santesson
- Re: [TLS] Verify data in the RI extension? Yoav Nir