CISSP – Information Systems Security Architecture Professional (ISSAP) — Question 57

Which of the following techniques can be used by an administrator while working with the symmetric encryption cryptography? Each correct answer represents a complete solution. Choose all that apply.

Answer options

• A. Block cipher
• B. Stream cipher
• C. Transposition cipher
• D. Message Authentication Code

Correct answer: A, B, D

Explanation

The correct answers are A, B, and D because both block ciphers and stream ciphers are fundamental techniques used in symmetric encryption to encrypt data. A Message Authentication Code (MAC) is also used to verify data integrity and authenticity in symmetric encryption. However, a transposition cipher is not a symmetric encryption method but rather a type of classical cipher, which makes option C incorrect.