[elliewithcolor]

General implementation or a „from scratch“?

For general here is a list: https://pq-crystals.org/kyber/software.shtml

[cipherboy]

Note that there may be incompatibilities (as noted in the article) until NIST has published the final revisions. Some specifications are on Round 3 kyber, others are on FIPS 203.

This one will interoperate with Bouncy Castle (both Java and C#) as we both use FIPS 203 draft, but it won't interoperate with OQS simultaneously (three-way interop) as that is still on the Round 3 submission.

See also: https://github.com/bcgit/bc-java/issues/1578

(Disclosure: BC is my employer)

[elliewithcolor]

Fair point.