A Detailed Elliptic Curve Cryptography Tutorial
This looks nice.  Too bad I care more about Montgomery and Twisted Edwards curves (everyone say curve255129 and edDSA are great, and I believe them).I'm looking for one thing, which I hope should speed up signature and verification speed with very little bloat: converting a Twisted Edwards point to Montgomery space, then back (with that sign recovery trick after the Montgomery ladder).Reading (and trying to apply) the relevant papers has been frustrating so far (I get wrong results), and I can't find code (or pseudo-code) I can use.  Have someone implemented this?