SHA-1 is a
(A) encryption algorithm
(B) decryption algorithm
(C) key exchange algorithm
(D) message digest function


Answer: (D)

Explanation: SHA-1 (Secure Hash Algorithm 1) is a cryptographic hash function which takes an input and produces a 160-bit (20-byte) hash value known as a message digest which is 40 digits long.
So, it is a message digest function.

Option (D) is correct.

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