easy
Single Answer
0Which one of the following is not an attribute of a typical hashing algorithm?
Answer Options
A
They require a cryptographic key.
B
They are irreversible.
C
It is very difficult to find two messages with the same hash value.
D
They take variable-length input.
Correct Answer: A
Explanation
Hash functions do not include any element of secrecy and, therefore, do not require a cryptographic key.