Fundamental Information Security Cryptography UPDATED ACTUAL Exam Questions and CORRECT Answers

Fundamental Information Security
Cryptography UPDATED ACTUAL Exam
Questions and CORRECT Answers
A keyword mixed alphabet cipher uses a cipher alphabet that consists of a keyword, minus
duplicates, followed by the remaining letters of the alphabet

true or false - CORRECT ANSWER true


Which set of characteristics describes the Caesar cipher accurately?
answers:
Asymmetric, block, substitution
Asymmetric, stream, transposition
Symmetric, stream, substitution

Symmetric, block, transposition - CORRECT ANSWER Symmetric, stream, substitution


Gary is sending a message to Patricia. He wants to ensure that nobody tampers with the message
while it is in transit. What goal of cryptography is Gary attempting to achieve?
answers:
Confidentiality
Integrity
Authentication

Nonrepudiation - CORRECT ANSWER Integrity


Digital signatures require asymmetric key cryptography.

true or false - CORRECT ANSWER true


What mathematical problem forms the basis of most modern cryptographic algorithms?
answers:

, Factoring large primes
Traveling salesman problem
Quantum mechanics

Birthday problem - CORRECT ANSWER Factoring large primes


Which cryptographic attack offers cryptanalysts the most information about how an encryption
algorithm works?
Answers:
Chosen plaintext
Ciphertext only
Known plaintext

Chosen ciphertext - CORRECT ANSWER Chosen plaintext


The hash message authentication code (HMAC) is a hash function that uses a key to create a
hash, or message digest.

true or false - CORRECT ANSWER true


The financial industry created the ANSI X9.17 standard to define key management procedures.

true or false - CORRECT ANSWER true


When Patricia receives a message from Gary, she wants to be able to demonstrate to Sue that the
message actually came from Gary. What goal of cryptography is Patricia attempting to achieve?
Answers:
Confidentiality
Integrity
Authentication

Nonrepudiation - CORRECT ANSWER Nonrepudiation