At the TRON workshop [0], we (Joe and Sean) were asked to provide our views 
about the status and timeline for TLS 1.3; we wanted to share the same 
information with the WG.

Before that though, we want to thank the researchers for the time they put into 
analyzing the protocol as well as the TRON Workshop sponsors.  The workshop was 
constructive and helpful.  There are a number of groups formally analyzing the 
protocol, some by hand and some with automated tools, they’ve already 
discovered issues that we’ve fixed [1].

The workshop made the following clear to us wrt TLS 1.3:

o - Basically OK overall, but there was some sentiment that we should only do 
0-RTT with PSK (see recent list discussion).

o - Some researchers prefer the key schedule that is currently documented in 
the draft because it eases modular analysis of the protocol. Others prefer the 
simplified proposals in [2,3].

We are hoping to be able to do a WGLC sometime shortly after Buenos Aires 
(i.e., mid-April).  Of course, this timeline is entirely dependent on the WG 
reaching consensus on the remaining issues.

At this point we are looking at reducing change to the protocol.  We are not 
looking to add any more features, removal of features and slight changes that 
improve the protocol are still on the table. Obviously, if we find any glaring 
issues we will fix them regardless.

One thing that was reinforced at TRON and we think the TLS WG should be aware 
of is that the research community needs time to do their analysis.  With that 
in mind, the chairs are very strongly leaning towards an extended WGLC of 6 
weeks.

J&S

[0] 
https://www.internetsociety.org/events/ndss-symposium-2016/tls-13-ready-or-not-tron-workshop-programme
[1] https://mailarchive.ietf.org/arch/msg/tls/TugB5ddJu3nYg7chcyeIyUqWSbA
[2] https://mailarchive.ietf.org/arch/msg/tls/uUbeVDQwJuZO_bYhOWJRvlNlNtg
[3] https://mailarchive.ietf.org/arch/msg/tls/rgiTKwRb23T7iKjlkAQAt112ipY
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