Re: [tcpinc] tcpcrypt MTI key exchange (speak now or forever hold your peace...)
iang <iang@iang.org> Tue, 24 October 2017 10:41 UTC
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To: David Mazieres expires 2018-01-21 PST <mazieres-m3w8362yb4cc5hherzqjdkknf6@temporary-address.scs.stanford.edu>, Gregorio Guidi <greg_g@posteo.net>, tcpinc@ietf.org
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From: iang <iang@iang.org>
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Date: Tue, 24 Oct 2017 12:41:51 +0200
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Subject: Re: [tcpinc] tcpcrypt MTI key exchange (speak now or forever hold your peace...)
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On 23/10/2017 22:25, David Mazieres wrote: > We are considering the following proposal for MTI key exchange protocols > in tcpcrypt: > > 1. Implementations MUST support Curve25519. > > 2. Implementations SHOULD support Curve448 to the extent that suitable > implementations are available. > > 3. Implementations MAY support P256 and P521 (particularly since > hardware implementations are widely available for the former). > > (Obviously whatever algorithms are supported can always be disabled by > configuration--this is just about what the software MUST support, not > what everyone must use.) > > The security ADs have not 100% signed off on this approach yet, but seem > receptive to it. However, given the timeline, we would like to > parallelize things and find out *now* if there are any objections to the > proposal. Based on the working group discussion, I think everyone will > be happy, so please speak up now if you object. > > Thanks, > David In general +1. The only quibble I would have is that 2. Curve448 should be a MAY. Firstly, a caveated SHOULD becomes a MAY, at some level of approximation. Secondly, if we manage to convince an enemy to crunch Curve25519 then we have won a great victory, and we can upgrade at our leisure with newer information. But it is only a quibble - I wouldn't hold up any vote on this just because of an idle bar prediction on consequences. iang
- Re: [tcpinc] AD review of draft-ietf-tcpinc-tcpcr… Daniel B Giffin
- Re: [tcpinc] AD review of draft-ietf-tcpinc-tcpcr… Mirja Kuehlewind (IETF)
- Re: [tcpinc] AD review of draft-ietf-tcpinc-tcpcr… David Mazieres
- [tcpinc] AD review of draft-ietf-tcpinc-tcpcrypt Mirja Kuehlewind (IETF)
- Re: [tcpinc] AD review of draft-ietf-tcpinc-tcpcr… Daniel B Giffin
- Re: [tcpinc] AD review of draft-ietf-tcpinc-tcpcr… Mirja Kühlewind
- Re: [tcpinc] AD review of draft-ietf-tcpinc-tcpcr… Black, David
- [tcpinc] new drafts of TCP-ENO and tcpcrypt Daniel B Giffin
- Re: [tcpinc] new drafts of TCP-ENO and tcpcrypt Mirja Kuehlewind (IETF)
- Re: [tcpinc] new drafts of TCP-ENO and tcpcrypt Gregorio Guidi
- Re: [tcpinc] new drafts of TCP-ENO and tcpcrypt dm-list-tcpcrypt
- Re: [tcpinc] new drafts of TCP-ENO and tcpcrypt iang
- [tcpinc] Making ECDHE-Curve25519 the only MTI for… David Mazieres
- Re: [tcpinc] Making ECDHE-Curve25519 the only MTI… Kyle Rose
- Re: [tcpinc] Making ECDHE-Curve25519 the only MTI… Mirja Kühlewind
- Re: [tcpinc] Making ECDHE-Curve25519 the only MTI… Black, David
- Re: [tcpinc] Making ECDHE-Curve25519 the only MTI… Mirja Kuehlewind (IETF)
- [tcpinc] tcpcrypt MTI key exchange (speak now or … David Mazieres
- Re: [tcpinc] tcpcrypt MTI key exchange (speak now… Rene Struik
- Re: [tcpinc] tcpcrypt MTI key exchange (speak now… David Mazieres
- Re: [tcpinc] tcpcrypt MTI key exchange (speak now… iang
- Re: [tcpinc] tcpcrypt MTI key exchange (speak now… David Mazieres
- Re: [tcpinc] tcpcrypt MTI key exchange (speak now… iang
- Re: [tcpinc] tcpcrypt MTI key exchange (speak now… Gregorio Guidi