Question

What is the minimum size of the key in blowfish algorithm?

(a) 64 bits

(b) 32 bits

(c) 56 bits

(d) 48 bits

This question was posed to me during an interview for a job.

This intriguing question originated from Blowfish Algorithm in section Pseudorandom Number Generation and Stream Ciphers and More Block Ciphers of Cryptograph & Network Security

Answer 1

The correct answer is (b) 32 bits

Easiest explanation: The minimum size of the key in blowfish algorithm is 4 bytes or 32 bits.