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See also: Cryptography | Blowfish | Cypher

A straightforward, lightweight symmetric encryption algorithm meaning that any communicating parties have a shared key. Other forms of encryption such as Diffie-Hellman are asymmetric which means they use public-pivate key pairs.

Twofish was an Advanced Encryption Standard (AES) finalist and is the successor to the Blowfish algorithm. Both the Blowfish and Twofish algorithms are open source and created, in part, by recognized security expert Bruce Schneier.