Need a category for Cryptography

[dobromyslov]

It would be awesome to see on the awsome list cryptographic libraries from these repos:

1. https://github.com/dalek-cryptography
2. https://github.com/RustCrypto

Some additional details here:
https://rustsec.org/advisories/RUSTSEC-2016-0005.html