Package blowfish implements Bruce Schneier's Blowfish encryption algorithm.

This is an implementation of Diffie-Hellman Key Exchange algorithm.

Package pbkdf2 implements the key derivation function PBKDF2 as defined in RFC 2898 / PKCS #5 v2.0.

Package sha3 implements the SHA-3 fixed-output-length hash functions and the SHAKE variable-output-length hash functions defined by FIPS-202.

Package threefish implements the Threefish tweakable block cipher.

Package twofish implements Bruce Schneier's Twofish encryption algorithm.