Re: [TLS] Binder key labels for imported PSKs

2019-09-05 Thread Martin Thomson
That's a much better answer than I was looking for :) That makes sense. The gap between theory and practice here is still something that is worth spending some time on, but I can see how that is something that we might want to keep out of this document. The goal here is simple: take a PSK tha

Re: [TLS] FYI: new TLS HandshakeType allocation, from draft-ietf-perc-srtp-ekt-diet

2019-09-05 Thread Richard Barnes
On Thu, Sep 5, 2019 at 2:38 AM Watson Ladd wrote: > I wish I understood the analysis of TLS 1.3 better, but a core feature > of the protocol is compositionality: the keys from the handshake are > fresh, unlike in TLS 1.2 where they were used to encrypt the Finished > thus posing an obstacle to an

Re: [TLS] Binder key labels for imported PSKs

2019-09-05 Thread Jonathan Hoyland
Hi Martin, So I agree that on the micro-scale there is limited practical value to be gained from adding this binding. The theoretical benefits, which mean that the client and server agree that PSK Importers are being used are nice, but on their own might not justify a high-effort change. However,