Re: [TLS] [CFRG] Chempat-X: hybrid of X25519 and sntrup761

2024-01-29 Thread Eric Rescorla
Hi folks, Replying to DJB's email but not really in direct response to him. I'm not a cryptographer and don't have a strong opinion on the technical merits of X-wing in particular, but I've been following this thread (lots of messages) and was hoping to try to summarize what I think is common gro

Re: [TLS] [CFRG] Chempat-X: hybrid of X25519 and sntrup761

2024-01-29 Thread D. J. Bernstein
Ilari Liusvaara writes: > Security review of X-wing only needs to be done once. "Of course we hope that any particular piece of security review can be done just once and that's the end of it (OK Google, please read once through the Chrome source code and remove the buffer overflows), but the bigge

Re: [TLS] [CFRG] Chempat-X: hybrid of X25519 and sntrup761

2024-01-29 Thread Ilari Liusvaara
On Sat, Jan 27, 2024 at 02:56:45PM -, D. J. Bernstein wrote: > David Benjamin writes: > > No more heavily parameterized algorithms. Please precompose them. > > > > Once you precompose them, you may as well take advantage of properties > > of the inputs and optimize things. > > In my implemento

Re: [TLS] [CFRG] Chempat-X: hybrid of X25519 and sntrup761

2024-01-27 Thread D. J. Bernstein
David Benjamin writes: > No more heavily parameterized algorithms. Please precompose them. https://cr.yp.to/papers.html#coolnacl explains advantages of providing precomposed parameter-free bundles to the application. The current discussions are about specific proposals for such bundles (or at leas