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WGU Introduction to Cryptography HNO1 Sample Questions:

1. (Which symmetric encryption technique uses a 112-bit key size and a 64-bit block size?)

A) DES
B) IDEA
C) 3DES
D) AES

2. (Which mechanism can be applied to protect the integrity of plaintext when using AES?)

A) RC4
B) Message Authentication Code (MAC)
C) Kerberos key sharing
D) RSA

3. (Which certificate encoding process is binary-based?)

A) Distinguished Encoding Rules (DER)
B) Rivest-Shamir-Adleman (RSA)
C) Public Key Infrastructure (PKI)
D) Privacy Enhanced Mail (PEM)

4. (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) Vigenere
B) Playfair
C) Pigpen
D) Caesar

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

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

Solutions: