What application of encryption verifies that a document was sent by the person it says it is from? Select one: a. Digital rights management b. Asymmetric encryption c. Cryptographic hash d. Digital signatures

D.

Explanation:

a. is about delivering material only to who is entitled to it

b. is about encrypting and decrypting with two different keys

c. is about proving the integrity of a document (that it hasn't been changed).

d. is a cryptographic hash in combination with private key, so that provides both document integrity and non-repudiation