Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt-01
Joe Touch <touch@ISI.EDU> Tue, 29 July 2008 14:11 UTC
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Date: Tue, 29 Jul 2008 07:10:19 -0700
From: Joe Touch <touch@ISI.EDU>
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To: Eric Rescorla <ekr@networkresonance.com>
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Cc: Adam Langley <agl@imperialviolet.org>, tcpm@ietf.org, "Anantha Ramaiah (ananth)" <ananth@cisco.com>
Subject: Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt-01
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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi, Eric, Eric Rescorla wrote: | At Tue, 29 Jul 2008 06:40:48 -0700, | Joe Touch wrote: |> -----BEGIN PGP SIGNED MESSAGE----- |> Hash: SHA1 ... |> | So, if we are going down that route, then I would argue it may be |> | worthwhile to debate "how much" to include in general, i.e, is it |> | worthwhile to include selective portions OR part of the data portion of |> | the TCP data in the MAC computation instead of he entire data.? |> |> Absolutely; that can be implemented inside the MAC algorithm, opaquely |> to TCP-AO, though. I.e., I can create a MAC that hashes only the odd |> blocks, only the first half of the blocks, etc. ... | Well, it's true that one *could* do this, but I think it's a really | bad idea. MACs should provide a uniform interface and set of semantics. | If you want to have partial coverage, this should be handled at the | TCP-AO level. First, I'm not sure this overall function is useful; since apps can't align data to the TCP segments, IMO the data is "all or none". I don't see a reason to omit the data entirely from a MAC (excepting performance for statistical benefit). Overall, this doesn't seem to fit the spirit of "TCP-AO should be simple". | I appreciate that you're trying to isolate the crypto from the TCP-AO | service, but I don't think you can isolate it to this extent. It would be useful to explain the reason you see a need for coupling here (provided this is even needed, as noted above). Joe -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iEYEARECAAYFAkiPJMoACgkQE5f5cImnZrsR5QCgjz/jGcyaulBsaj7jveB7QI8b AesAoPcExSVjVHJIh46Ppbl1qzTZUX9F =e/3B -----END PGP SIGNATURE----- _______________________________________________ tcpm mailing list tcpm@ietf.org https://www.ietf.org/mailman/listinfo/tcpm
- [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt-01 Eric Rescorla
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Joe Touch
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Eric Rescorla
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Eric Rescorla
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Joe Touch
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Joe Touch
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Eric Rescorla
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Joe Touch
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Adam Langley
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Eric Rescorla
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Eric Rescorla
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Adam Langley
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Joe Touch
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Eric Rescorla
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Joe Touch
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Joe Touch
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Eric Rescorla
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Adam Langley
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Joe Touch
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Eric Rescorla
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Anantha Ramaiah (ananth)
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Joe Touch
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Eric Rescorla
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Anantha Ramaiah (ananth)
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Joe Touch
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Joe Touch
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Anantha Ramaiah (ananth)
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Eric Rescorla
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Caitlin Bestler
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Joe Touch
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Joe Touch
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Lars Eggert
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Eric Rescorla
- [tcpm] tcp-auth-opt issue: replay protection Joe Touch
- Re: [tcpm] tcp-auth-opt issue: replay protection Adam Langley
- Re: [tcpm] tcp-auth-opt issue: replay protection Joe Touch
- Re: [tcpm] tcp-auth-opt issue: replay protection Adam Langley
- Re: [tcpm] tcp-auth-opt issue: replay protection Eric Rescorla
- Re: [tcpm] tcp-auth-opt issue: replay protection Joe Touch
- Re: [tcpm] tcp-auth-opt issue: replay protection Adam Langley
- Re: [tcpm] tcp-auth-opt issue: replay protection Joe Touch
- Re: [tcpm] tcp-auth-opt issue: replay protection Lars Eggert
- Re: [tcpm] tcp-auth-opt issue: replay protection Eric Rescorla
- Re: [tcpm] tcp-auth-opt issue: replay protection Lars Eggert
- Re: [tcpm] tcp-auth-opt issue: replay protection Anantha Ramaiah (ananth)
- Re: [tcpm] tcp-auth-opt issue: replay protection Joe Touch
- Re: [tcpm] tcp-auth-opt issue: replay protection Eddy, Wesley M. (GRC-RCN0)[VZ]
- Re: [tcpm] tcp-auth-opt issue: replay protection Adam Langley
- Re: [tcpm] tcp-auth-opt issue: replay protection Caitlin Bestler
- Re: [tcpm] tcp-auth-opt issue: replay protection Joe Touch
- Re: [tcpm] tcp-auth-opt issue: replay protection Ron Bonica