CompTIA: Advanced Security Practitioner (CASP) Exam Prep

Answer: A - Blowfish is an encryption system produced by Counterpane Systems that performs a 64-bit block cipher at very fast speeds.

Key Takeaway: Blowfish is a fast block cipher, except when changing keys. Each new key requires pre-processing equivalent to encrypting about 4 kilobytes of text, which is very slow compared to other block ciphers. Blowfish has a 64-bit block size and a variable key length from 32 up to 448 bits.