Re: [TLS] 0-RTT (Was: Re: 0-RTT and Anti-Replay)
Daniel Kahn Gillmor <dkg@fifthhorseman.net> Mon, 13 April 2015 20:59 UTC
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From: Daniel Kahn Gillmor <dkg@fifthhorseman.net>
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Date: Mon, 13 Apr 2015 16:59:53 -0400
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Subject: Re: [TLS] 0-RTT (Was: Re: 0-RTT and Anti-Replay)
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On Mon 2015-04-13 14:11:44 -0400, Ilari Liusvaara wrote: > On Mon, Apr 13, 2015 at 10:02:43AM -0700, Martin Thomson wrote: > >> But I imagine that this depends on the model we employ. Replayable >> data could just be consider the start of a stream. On the other hand, >> unreliable data doesn't work very well for a stream mode. Conversely, >> replayable data makes no sense in a datagram mode, but all data is >> unreliable there. > > I thought the recommended client-side interface called for auto- > retransmit, which would mean that if application handled 0RTT as anything > else than a prefix, it would now create two cases serverside. Just because the data is replayable doesn't mean that it is replayable *in the same stream*. For TLS over TCP, both sides of the stream should be able to model the state of the other side of the connection in a way that the next piece of data sent depends on the understanding being correct. If we decide that the client will auto-retransmit the payload, that means that an attacker could cause *a second stream* to start in the same way, not that the existing stream might or might not have the initial payload loaded twice. --dkg
- [TLS] 0-RTT and Anti-Replay Eric Rescorla
- Re: [TLS] 0-RTT and Anti-Replay Mohamad Badra
- Re: [TLS] 0-RTT and Anti-Replay Eric Rescorla
- Re: [TLS] 0-RTT and Anti-Replay Stephen Checkoway
- Re: [TLS] 0-RTT and Anti-Replay Daniel Kahn Gillmor
- Re: [TLS] 0-RTT and Anti-Replay Andrey Jivsov
- Re: [TLS] 0-RTT and Anti-Replay Eric Rescorla
- Re: [TLS] 0-RTT and Anti-Replay Martin Thomson
- Re: [TLS] 0-RTT and Anti-Replay Andrey Jivsov
- Re: [TLS] 0-RTT and Anti-Replay Colm MacCárthaigh
- Re: [TLS] 0-RTT and Anti-Replay Colm MacCárthaigh
- Re: [TLS] 0-RTT and Anti-Replay Nico Williams
- Re: [TLS] 0-RTT and Anti-Replay Ilari Liusvaara
- Re: [TLS] 0-RTT and Anti-Replay Nico Williams
- Re: [TLS] 0-RTT and Anti-Replay Nico Williams
- Re: [TLS] 0-RTT and Anti-Replay Martin Thomson
- Re: [TLS] 0-RTT and Anti-Replay Eric Rescorla
- Re: [TLS] 0-RTT and Anti-Replay Roland Zink
- Re: [TLS] 0-RTT and Anti-Replay Martin Thomson
- Re: [TLS] 0-RTT and Anti-Replay Colm MacCárthaigh
- Re: [TLS] 0-RTT and Anti-Replay Viktor Dukhovni
- Re: [TLS] 0-RTT and Anti-Replay Martin Thomson
- Re: [TLS] 0-RTT and Anti-Replay Brian Sniffen
- Re: [TLS] 0-RTT and Anti-Replay Salz, Rich
- Re: [TLS] 0-RTT and Anti-Replay Roland Zink
- Re: [TLS] 0-RTT and Anti-Replay Martin Thomson
- Re: [TLS] 0-RTT and Anti-Replay Martin Thomson
- Re: [TLS] 0-RTT and Anti-Replay Viktor Dukhovni
- Re: [TLS] 0-RTT and Anti-Replay Roland Zink
- Re: [TLS] 0-RTT and Anti-Replay Viktor Dukhovni
- Re: [TLS] 0-RTT and Anti-Replay Roland Zink
- Re: [TLS] 0-RTT and Anti-Replay Colm MacCárthaigh
- Re: [TLS] 0-RTT and Anti-Replay Ilari Liusvaara
- Re: [TLS] 0-RTT and Anti-Replay Viktor Dukhovni
- Re: [TLS] 0-RTT and Anti-Replay Ilari Liusvaara
- Re: [TLS] 0-RTT and Anti-Replay Nico Williams
- Re: [TLS] 0-RTT and Anti-Replay Viktor Dukhovni
- Re: [TLS] 0-RTT and Anti-Replay Nico Williams
- Re: [TLS] 0-RTT and Anti-Replay Nico Williams
- Re: [TLS] 0-RTT and Anti-Replay Eric Rescorla
- Re: [TLS] 0-RTT and Anti-Replay Nico Williams
- Re: [TLS] 0-RTT and Anti-Replay Patrick McManus
- Re: [TLS] 0-RTT and Anti-Replay Dave Garrett
- Re: [TLS] 0-RTT and Anti-Replay Martin Thomson
- Re: [TLS] 0-RTT and Anti-Replay Eric Rescorla
- Re: [TLS] 0-RTT and Anti-Replay Eric Rescorla
- Re: [TLS] 0-RTT and Anti-Replay Nico Williams
- Re: [TLS] 0-RTT and Anti-Replay Ilari Liusvaara
- Re: [TLS] 0-RTT and Anti-Replay Watson Ladd
- Re: [TLS] 0-RTT and Anti-Replay Ilari Liusvaara
- [TLS] 0-RTT (Was: Re: 0-RTT and Anti-Replay) Ilari Liusvaara
- Re: [TLS] 0-RTT (Was: Re: 0-RTT and Anti-Replay) Martin Thomson
- Re: [TLS] 0-RTT (Was: Re: 0-RTT and Anti-Replay) Ilari Liusvaara
- Re: [TLS] 0-RTT (Was: Re: 0-RTT and Anti-Replay) Martin Thomson
- Re: [TLS] 0-RTT (Was: Re: 0-RTT and Anti-Replay) Ilari Liusvaara
- Re: [TLS] 0-RTT (Was: Re: 0-RTT and Anti-Replay) Martin Thomson
- Re: [TLS] 0-RTT (Was: Re: 0-RTT and Anti-Replay) Ilari Liusvaara
- Re: [TLS] 0-RTT (Was: Re: 0-RTT and Anti-Replay) Martin Thomson
- Re: [TLS] 0-RTT (Was: Re: 0-RTT and Anti-Replay) Daniel Kahn Gillmor
- Re: [TLS] 0-RTT (Was: Re: 0-RTT and Anti-Replay) Ilari Liusvaara
- Re: [TLS] 0-RTT (Was: Re: 0-RTT and Anti-Replay) Ilari Liusvaara
- Re: [TLS] 0-RTT (Was: Re: 0-RTT and Anti-Replay) Martin Thomson
- Re: [TLS] 0-RTT (Was: Re: 0-RTT and Anti-Replay) Nico Williams
- Re: [TLS] 0-RTT (Was: Re: 0-RTT and Anti-Replay) Ilari Liusvaara
- Re: [TLS] 0-RTT (Was: Re: 0-RTT and Anti-Replay) Ilari Liusvaara