Page 419 - (ISC)² CISSP Certified Information Systems Security Professional Official Study Guide

10. Which one of the following cipher types operates on large pieces of
a message rather than individual characters or bits of a message?

A. Stream cipher

B. Caesar cipher

C. Block cipher

D. ROT3 cipher

11. What is the minimum number of cryptographic keys required for
secure two-way communications in symmetric key cryptography?

A. One

B. Two

C. Three

D. Four

12. Dave is developing a key escrow system that requires multiple

people to retrieve a key but does not depend on every participant
being present. What type of technique is he using?

A. Split knowledge

B. M of N Control

C. Work function

D. Zero-knowledge proof

13. Which one of the following Data Encryption Standard (DES)
operating modes can be used for large messages with the assurance

that an error early in the encryption/decryption process won’t spoil
results throughout the communication?

A. Cipher Block Chaining (CBC)

B. Electronic Code Book (ECB)

C. Cipher Feedback (CFB)

D. Output feedback (OFB)

14. Many cryptographic algorithms rely on the difficulty of factoring