[messaging] XEdDSA specification

[Martin Thomson]

On 21 October 2016 at 10:37, Trevor Perrin <trevp at trevp.net> wrote:
> I'm happy to announce that a spec for the "XEd25519" signature
> algorithm used in Signal is available at [1].


One comment: the document doesn't really explain why you might want to
use X- or VX-prefixed variants over the deterministic base algorithms
(the benefits of which have many words spilled over).