Question

ANSI X9.17 uses a seed of size

(a) 56 bits

(b) 64 bits

(c) 32 bits

(d) 128 bits

The question was asked in an international level competition.

The question is from Pseudorandom Number Generators and Stream Ciphers topic in section Pseudorandom Number Generation and Stream Ciphers and More Block Ciphers of Cryptograph & Network Security

Answer 1

The correct answer is (b) 64 bits

To elaborate: The seed in ANSI X9.17 is of 64 bits and the randomly generated keys are of size 56 bits.