Hi,

2017-03-30 10:09 GMT+02:00 Remko Tronçon <re...@el-tramo.be>:

> X3DH relies on XEdDSA to be able to use Curve25519 keys to create
> EdDSA-signatures. As far as I can tell, this solved a problem where all
> long-standing identity keys in Signal were X25519, and they needed them to
> create signatures (which you can't do without conversion to Ed25519). I
> can't seem to find any public implementation of XEdDSA yet, except in
> libsignal, so this sounds like it makes implementing OMEMO pretty hard at
> the moment.
>

Are you looking for this:
https://whispersystems.org/docs/specifications/xeddsa/

cheers
Daniel
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