Implement more encryption algorithms #15
Description
Candidates:
Block Ciphers:
- Blowfish
- Twofish
- Threefish, this one is based on Skein, so the SPARKSkein implementation would be a good start
- AES (PDF)
- IDEA (the patent expired in 2012, so it should be free to use now, but proper documentation seems scarce)
Stream ciphers:
And then there's the thing that any proper encryption needs a cryptographically secure random number generator, be it for nonce, key, or random seed initializations.