Re: [TLS] [EXTERNAL] Re: Published RFC 8446bis -05

2022-10-25 Thread Rob Sayre
On Tue, Oct 25, 2022 at 3:40 PM Andrei Popov wrote: > (It's also not clear to me how we would get rid of HRR in a future TLS > version, without removing algorithm options, adding round-trips, or relying > on some out-of-band signals.) > It was pretty much the idea to do those things, although I

Re: [TLS] [EXTERNAL] Re: Published RFC 8446bis -05

2022-10-25 Thread Andrei Popov
In TLS <= 1.2, the client and server agree on the (EC)DHE group to use for key exchange by negotiating it (at the cost of a round-trip). In TLS 1.3, the client tries to guess what (EC)DHE group(s) the server might support and sends key share(s) accordingly (saving a round-trip). When a TLS 1.3