Question

Which of the following is not an example of hash function?

A). RIPEMD
B). RC4
C). SHA-256
D). MD4

Answer 1

RC4 is not an example of a hash function.

Step-by-step explanation:

The correct answer is RC4.

A hash function is a mathematical function that converts an input value into a fixed-size string of characters, which is typically a unique representation of the input.

RIPEMD, SHA-256, and MD4 are all examples of hash functions as they take an input and produce a fixed-size output. However, RC4 is a symmetric key stream cipher, not a hash function, as it generates a keystream of pseudo-random bits based on a secret key and a nonce.