Sample Exam Scenario: Which mechanism provides verified non-repudiation?
A. Symmetric block cipher with shared secret key
B. Asymmetric digital signature generated with sender's private key
C. HMAC-SHA256 hash using pre-shared symmetric key
D. Cyclic Redundancy Check (CRC32) packet checksum
Correct Answer: B. Digital signatures use the sender's private key (known only to the sender), providing non-repudiation. Symmetric keys are shared between parties and cannot establish sole identity.
FRONT (CLICK TO FLIP)
What is the primary objective of this security control?
VERIFIED BACK (ANSWER)
Enforces confidentiality and access mediation according to security classification labels.