Blowfish Algorithm is a Feistel Network, iterating a simple encryption function 16

times. The block size is 64 bits, and the key can be any length up to 448 bits. Although

there is a complex initialization phase required before any encryption can take place, the

actual encryption of data is very efficient on large microprocessors.

Blowfish is a variable-length key block cipher. It is suitable for applications where the

key does not change often, like a communications link or an automatic file encryptor. It is

significantly faster than most encryption algorithms when implemented on 32-bit

microprocessors with large data caches.