Re: [TLS] Issue 49: Finished.verify length
Eric Rescorla <ekr@networkresonance.com> Fri, 14 September 2007 18:40 UTC
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Date: Fri, 14 Sep 2007 11:36:32 -0700
From: Eric Rescorla <ekr@networkresonance.com>
To: Pasi.Eronen@nokia.com
Subject: Re: [TLS] Issue 49: Finished.verify length
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At Fri, 14 Sep 2007 17:28:24 +0300, <Pasi.Eronen@nokia.com> wrote: > > Eric Rescorla wrote: > > > I'm still trying to understand the rationale for why it makes sense > > to have a verify_data != 12 bytes. Pasi, could you elaborate? > > Again, I'm not suggesting changing it from 12 bytes; just allowing > the agility to change it in the future without new TLS version. > > One (somewhat hypothetical) use would be a cipher suite that tries > to have _everything_ at 256-bit security level (maybe for some > government approval reasons; not today, but maybe 5 years from now). > > You might argue that this kind of security level isn't really > needed, but then again, some people seem to be willing to go > to great lengths to match these "security levels" (just think > of SHA-224.. :-) OK, I see where you're going with this, but I'm not sure it requires us to do anything now. If we're confronted with such a cipher suite, we can just have the document Update TLS 1.2, since it would only be applicable to that new cipher suite. I don't think this needs a version revision. Unless you're proposing making this a variable length vector, whcih seems like a bad idea, since it should be defined in the cipher suite. -Ekr _______________________________________________ TLS mailing list TLS@lists.ietf.org https://www1.ietf.org/mailman/listinfo/tls
- [TLS] Issue 49: Finished.verify length Eric Rescorla
- Re: [TLS] Issue 49: Finished.verify length Mike
- Re: [TLS] Issue 49: Finished.verify length Eric Rescorla
- Re: [TLS] Issue 49: Finished.verify length Mike
- Re: [TLS] Issue 49: Finished.verify length Bodo Moeller
- RE: [TLS] Issue 49: Finished.verify length Pasi.Eronen
- Re: [TLS] Issue 49: Finished.verify length Bodo Moeller
- Re: [TLS] Issue 49: Finished.verify length Bodo Moeller
- RE: [TLS] Issue 49: Finished.verify length Pasi.Eronen
- Re: [TLS] Issue 49: Finished.verify length Eric Rescorla
- Re: [TLS] Issue 49: Finished.verify length Eric Rescorla
- RE: [TLS] Issue 49: Finished.verify length Pasi.Eronen
- Re: [TLS] Issue 49: Finished.verify length Eric Rescorla
- RE: [TLS] Issue 49: Finished.verify length Pasi.Eronen
- Re: [TLS] Issue 49: Finished.verify length Eric Rescorla
- RE: [TLS] Issue 49: Finished.verify length Pasi.Eronen
- Re: [TLS] Issue 49: Finished.verify length Russ Housley