[Cryptech Tech] Curve 25519 in use cases?

[Joachim Strömbergson]

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Aloha!

We have mentioned Curve 25519 in the key estimates. But there are no
reference to Curve 25519 in the use cases.

In what use cases do we see Curve 25519. And how is the algorithm being
used - DH only?


I've spent some down time staring at Adam Langleys curve25519-donna code:

https://github.com/agl/curve25519-donna

The vanilla curve25519-donna.c is imho well written, fairly easy to
understand and self contained. The license is afaik a variant of
2-clause BSD. If we want to build our own core, using this code as a
functional reference seems to be the best one (I've found) so far.

One could potentially look directly at the qhasm code by DJB or the
curve25519-avr stuff by Peter Schwabe:

https://cryptojedi.org/crypto/

If we also look at Ed25519 then this seems like a fairly good resource:
http://dlbeer.co.nz/oss/c25519.html

- -- 
Med vänlig hälsning, Yours

Joachim Strömbergson - Alltid i harmonisk svängning.
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 Joachim Strömbergson          Secworks AB          joachim at secworks.se
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