IETF
mls
mls@jabber.ietf.org
Thursday, November 8, 2018< ^ >
Sean Turner has set the subject to: 20180927 MLS Interim
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[04:25:16] <dkg> ahoy ahoy, this is IETF MLS session 2
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[04:25:22] <dkg> i will be your friendly jabber scribe
[04:25:38] <dkg> if you want me to say something at the mic line, please prefix with MIC:
[04:25:46] <dkg> we are on the "Agenda" slide
[04:26:30] <dkg> https://datatracker.ietf.org/meeting/103/materials/slides-103-mls-sessb-message-protection-00
[04:27:03] <dkg> Richard Barnes presenting
[04:27:11] <dkg> "What's in the draft today..." slide
[04:28:02] <dkg> "Handshake Key Schedule" slide
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[04:29:18] <dkg> "Application Key Schedule" slide
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[04:29:38] <dkg> "Application Key Schedule" slide (first slide)
[04:30:21] <dkg> Russ Housley at the mic
[04:31:48] <dkg> slides are out of order now -- we're looking at page 8
[04:32:05] <dkg> ekr at the mic
[04:36:09] <dkg> dkg at the mic
[04:36:12] <dkg> ekr at the mic
[04:36:58] <dkg> slide 5
[04:37:48] <dkg> ekr at the mic
[04:39:49] <dkg> this discussion is about the decision between sharing ratcheting keys among the group, versus one key per sender
[04:40:15] <jhoyla> Does group chaining give a canonical ordering of messages?
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[04:43:12] <dkg> jhoyla: does this discussion answer your question?
[04:43:29] <dkg> please use MIC:  if you want me to relay your question to the room
[04:43:54] <jhoyla> Iā€™m in the room, I just wanted to make sure that I understood what was being said.
[04:44:06] <dkg> jhoyla: gotcha
[04:45:20] <kaduk@jabber.org/barnowl> I think that's a design choice; one proposal involved a way that did
not require a strict user message ordering
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[04:47:53] <dkg> we're on slide page 9
[04:48:33] <dkg> slide page 10
[04:48:41] <dkg> slide page 11
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[04:50:28] <kaduk@jabber.org/barnowl> The group[32] typo is taken from the draft :)
[04:50:43] <kaduk@jabber.org/barnowl> (IIUC  it should be group<255>)
[04:52:17] <dkg> on Summary slide
[04:52:25] <kaduk@jabber.org/barnowl> No love for AES-GCM-SIV?
[04:53:28] <dkg> ekr at the mic
[04:54:00] <dkg> kaduk says "have one joint and keep it well-oiled"
[04:55:14] <kaduk@jabber.org/barnowl> Sorry for not micing; I was going to not bother saying it but then
Richard asked me as I was already on the way back to my seat
[04:55:41] <dkg> ekr at the mic
[04:56:00] <dkg> looking back at slide 10
[04:57:21] <jhoyla> This is why we need a formal analysis šŸ˜‰
[04:57:24] <dkg> dkg at the mic
[04:58:56] <kaduk@jabber.org/barnowl> Didn't PGP teach us that we need to explicitly quote and include in
the crypto that which we reply to?
[04:59:42] <dkg> kaduk@jabber.org/barnowl: who learned that from PGP?
[04:59:57] <dkg> i regularly get signed messages that are context-free :(
[05:00:09] <dkg> but not context-independent, that is
[05:00:15] <kaduk@jabber.org/barnowl> People who actually care about PGP security?
Or is that the empty set...
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[05:02:13] <dkg> and we're done
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