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Encryption
Ciphers
| Ciphers | Description | Example |
| Block Cipher | Break messages into fixed length blocks, and encrypt each block using the same key | (3)DES, AES/Rijndael, IDEA |
| Stream Cipher | Break message into fixed length blocks, but use a sequence of keys to encrypt the blocks | Vigenère cipher, RC4, SEAL |
| Stream Cipher | Description |
| Synchronous Stream Ciphers | generates the key string from a source other than the message itself |
| Self-Synchronous Stream Ciphers | obtain a key from the message itself |
| Modes of Operation | Descriptions | Examples |
| Electronic Codebook Mode (ECB Mode) | | |
| Cipher-Block Chaining Mode (CBC Mode) | | |
| Counter Mode (CTR Mode) | | |
| Output Feedback Mode (OFB Mode) | | |
Common Terms
| DES | Data Encryption Standard |
