- Substitution ciphers
- The Caesar cipher (demo and try the cipher)
- The Affine cipher (demo and try the cipher)
- The Vigenére cipher (demo , try the cipher and try the attack)
- The one-time pad (demo and try the cipher)
- DES (demo and try the cipher)
- AES (demo and try the cipher)
- Modes of Operation (demo)
- The electronic codebook (ECB) mode (try the cipher)
- The cipher block chaining (CBC) mode (try the cipher)
- The output feedback (OFB) mode (try the cipher)
- The cipher feedback (CFB) mode (try the cipher)
- The counter (CTR) mode (try the cipher)
- RSA (demo and try the cipher)
- ElGamal (demo and try the cipher)