Question

What is a one-way password file?

(a) A scheme in which the password is jumbled and stored

(b) A scheme in which the password is XOR with a key and stored

(c) A scheme in which the hash of the password is stored

(d) A scheme in which the password is passed through a PRF, which is then stored

This question was posed to me in an online interview.

My doubt stems from Hash Functions and Its Applications in division Other Public Key Cryptosystems and Cryptographic Hash Functions of Cryptograph & Network Security

Answer 1

Right option is (c) A scheme in which the hash of the password is stored

For explanation I would say: A scheme in which the hash of the password is stored by an operating system rather than the password itself is the one-way password file system.