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WGU Introduction to Cryptography HNO1 Sample Questions:

1. (A security analyst uses a polyalphabetic substitution cipher with a keyword of YELLOW to encrypt a message. Which cipher should be used to encrypt the message?)

A) Playfair
B) Caesar
C) Vigenere
D) Pigpen

2. (What is a characteristic of Cipher Block Chaining (CBC) mode in cryptography?)

A) It generates a continuous stream of key material.
B) It operates on 32-bit blocks.
C) It requires a different key for each encryption operation.
D) It encrypts each block of plaintext dependent on the previous block.

3. (Which operation can be performed on a certificate during the "Issued" stage?)

A) Key archiving
B) Distribution
C) Creation
D) Key recovery

4. (Which attack may take the longest amount of time to achieve success?)

A) Rainbow table
B) Birthday
C) Dictionary
D) Brute-force

5. (How does Electronic Codebook (ECB) mode encryption function?)

A) Encrypts each block with the same key, where each block is independent of the others
B) Uses an IV to encrypt the first block, then uses the result to encrypt the next block
C) Uses a self-synchronizing stream on the blocks, where the IV is encrypted and XORed with the data stream
D) Converts from block to stream, then uses a counter value and a nonce to encrypt the data

Solutions: