Page 420 - (ISC)² CISSP Certified Information Systems Security Professional Official Study Guide
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the product of large prime numbers. What characteristic of this
problem are they relying on?
A. It contains diffusion.
B. It contains confusion.
C. It is a one-way function.
D. It complies with Kerchoff’s principle.
15. How many keys are required to fully implement a symmetric
algorithm with 10 participants?
A. 10
B. 20
C. 45
D. 100
16. What block size is used by the Advanced Encryption Standard?
A. 32 bits
B. 64 bits
C. 128 bits
D. Variable
17. What kind of attack makes the Caesar cipher virtually unusable?
A. Meet-in-the-middle attack
B. Escrow attack
C. Frequency analysis attack
D. Transposition attack
18. What type of cryptosystem commonly makes use of a passage from
a well-known book for the encryption key?
A. Vernam cipher
B. Running key cipher
C. Skipjack cipher
