____ are encrypted messages that can be mathematically proven to be authentic.
A)Digital signatures
B)MAC
C)Message certificates
D)Message digests

Question

Quizplus · Accepted Answer

Digital signatures use asymmetric cryptography to provide authenticity, integrity, and non-repudiation of messages. They are encrypted messages that can be mathematically proven to be authentic because they can only be created using the private key of the sender, and verified using the sender's public key. This makes them a secure mechanism to ensure that messages have not been tampered with during transmission and have originated from a trusted sender. MAC is Message Authentication Code, which is a symmetric cryptography mechanism used to authenticate a message, but it cannot provide non-repudiation. Message certificates are used to validate the identity of a sender and are not encrypted messages. Message digests are a one-way hash of a message that can be used to verify its integrity, but they cannot be used to provide authenticity or non-repudiation.

____ Are Encrypted Messages That Can Be Mathematically Proven to Be