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Re: Packet number encryption

Mikkel Fahnøe Jørgensen <mikkelfj@gmail.com> Fri, 02 February 2018 10:54 UTC

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From: Mikkel Fahnøe Jørgensen <mikkelfj@gmail.com>
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References: <CABkgnnVyo3MmWtVULiV=FJTnR528qfY8-OmKGWAs0bCvri-a_g@mail.gmail.com> <1F7FB3B8-A94C-4354-9944-FB09FB8DB68B@trammell.ch> <CABcZeBMbwdwyC9TxxHBLYaZKfNB-FG2wCGjqUZ_mNR-A1R47FA@mail.gmail.com> <9096e5ec-581e-875a-b1dd-bff0b05206fd@huitema.net> <CABkgnnWRQSAufwPss+qf=xAzCwRYeNNH8XLPm3yFaHxOb+ba4g@mail.gmail.com> <BF80500A-6277-45DC-8525-9C3FE138B76D@tik.ee.ethz.ch> <827BA6F8-5CA8-420A-B18B-60D8BC134A46@fb.com> <CA+9kkMDvp64NspznEuVy2tu8Eh1xmFkXu5S0AtDwbZKQ9Kq2fA@mail.gmail.com> <7F0C8A1D-1CE8-44E1-B3A4-ACFCB19D1F12@fb.com> <CABkgnnVsx9ohKO95bsDbYpM+bgWb-HQiVW2Yn=XWG458uzNgtg@mail.gmail.com> <CAGD1bZbH2qz2WL0YsOJJ=j7V-Lkt_V6K1RQ+5ZhMAzOWEAvdGQ@mail.gmail.com> <A236CE0B-24C1-41F0-A80D-7DD966D291B7@trammell.ch> <CAM4esxTj6Jv4nv975SDzczx9QEG-18WNm7UC7WxDcjyN+PeVgA@mail.gmail.com> <CAM4esxR_L9OvkEQ3G8z=yK1VgPQDJTMWeB2ts7CSgtV_de9MiQ@mail.gmail.com> <CAM4esxRVecQUJZwSv-+fV43CyTER-OY7H7WZGAKU0yT84qn6aA@mail.gmail.com> <26AC90FF-EDC0-431A-86D7-8F78555B5DB9@trammell.ch>
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Date: Fri, 02 Feb 2018 02:54:00 -0800
Message-ID: <CAN1APdexRCkBSJH4rokfjPmwT-ao_F=ue3FOLENj30vXo=6HqQ@mail.gmail.com>
Subject: Re: Packet number encryption
To: "Brian Trammell (IETF)" <ietf@trammell.ch>, Martin Duke <martin.h.duke@gmail.com>
Cc: QUIC WG <quic@ietf.org>, Jana Iyengar <jri@google.com>, Ted Hardie <ted.ietf@gmail.com>, Martin Thomson <martin.thomson@gmail.com>, Mirja Kühlewind <mirja.kuehlewind@tik.ee.ethz.ch>, Christian Huitema <huitema@huitema.net>, Eric Rescorla <ekr@rtfm.com>, Roberto Peon <fenix@fb.com>
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 and (2) it lets us dispense with all the messiness of PN jumps on
intentional migration. The first of these seems meh, the second is a little
more convincing: packet number jumping is not pretty.


I have proposed a defence against optimistic ACK attack the avoids the use
of packet number gaps and which makes it mandatory for implementations to
support:
https://github.com/quicwg/base-drafts/issues/1092

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