Encryption

Ciphers

 * AES
 * DES
 * Triple DES

Cryptographic hash functions
For non-cryptographic hash functions, see Error detection and correction.
 * MD4
 * MD5
 * RIPEMD
 * RIPEMD-160
 * SHA-1
 * SHA-2
 * SHA-3

Formats and protocols

 * OpenSSL salted format
 * PGP
 * Silent Circle Instant Messaging Protocol
 * SSL
 * TrueCrypt

Miscellaneous

 * ROT13