Domain 6 Answers and Explanations

1. B. Message digests are one-way functions where it is not possible to reproduce the input by observing the output. To facilitate this, the digests produced by messages with even slight differences are completely different from each other. There is no way to assess the similarity of two messages by comparing their message digests.
2. C. The Pretty Good Privacy (PGP), Rivest Shamir Adelman (RSA), and Diffie-Hellman algorithms all depend upon the difficulty of the prime factorization problem to achieve secrecy. The Elliptic Curve Cryptography (ECC) algorithm does not use prime numbers, and instead depends upon the mathematical properties of an elliptic curve.
3. C. Data stored in memory is considered data in use, and is the most difficult scenario to protect against. Data at rest is data stored on a disk or other storage device, while data in transit is data being sent over a network.
4. A. In an asymmetric encryption algorithm, the sender of a message...