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• Encryption Glossary

Blowfish Encryption

Blowfish is a symmetric encryption algorithm designed in 1993 by Bruce Schneier as an alternative to existing encryption algorithms.
Blowfish has a 64-bit block size and a variable key length - from 32 bits to 448 bits. It is a 16-round Feistel cipher and uses large key-dependent S-boxes. It is similar in structure to CAST-128, which uses fixed S-boxes.

Since then Blowfish has been analyzed considerably, and is gaining acceptance as a strong encryption algorithm.
Blowfish was designed in 1993 by Bruce Schneier as a fast, free alternative to existing encryption algorithms. Since then it has been analyzed considerably, and it is slowly gaining acceptance as a strong encryption algorithm. Blowfish is unpatented and license-free, and is available free for all uses.

The original Blowfish paper was presented at the First Fast Software Encryption workshop in Cambridge, UK (proceedings published by Springer-Verlag, Lecture Notes in Computer Science #809, 1994) and the April 1994 issue of Dr. Dobb's Journal. "Blowfish--One Year Later" appeared in the September 1995 issue of Dr. Dobb's Journal.
The only known attacks against Blowfish are based on its weak key classes.

Blowfish encryption algorithm : General information
Block cipher: 64-bit block
Variable key length: 32 bits to 448 bits
Designed by Bruce Schneier
First published: 1993





Asymmetric algorithms
Public key algorithms
Secret key algorithm
Block ciphers
DES encryption
Advanced Encryption Standard
Multiple encryption
AES encryption
Blowfish encryption
Public key Encryption
Symmetric algorithms
RC4 encryption
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