Each cryptosystem defines three algorithms:
- key(s) generation
- key size (length)
- expiration date
- encryption
- decryption
Cryptosystem types:
- Symmetric
- AES (Rijndael)
- ...
- Asymmetric (Public Key)
- RSA (Rivest, Shamir and Adleman) (PKCS#1)
- Diffie–Hellman key exchange protocol
- PGP
- GPG (GnuPG)
- SSL/TLS
- SSH
- ...
Resources:
http://www.keylength.com/
