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D 334 / D334 Objective Assessment (Latest Update 2026 / 2027) Introduction to Cryptography | Test Review Questions with Answers | 100% Correct | Grade A (Verified Answers) - WGU

Question:

When IPSec ______ mode is used, the connection is tunneled over a public network, but the network traffic is unprotected on either side of the connection.

Answer:

Tunnel

Question:

Determination of whether AH, ESP or both will be used in a given IPSec connection occurs in the 1st phase, IKE.

Answer:

False

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Question:

Mike and Ike have decided to use a time-based Security Association (SA) of 5,000 seconds for a tunnel they plan to establish using IPSec. During which phase of the IPSec connection setup will the SA lifetime be established?

Answer:

Phase 2

Question:

The encryption that happens in a secure tunnel is normally achieved with _____ encryption and the associated key that will be used for the communication is protected using _____ encryption.

Answer:

Symmetric, Asymmetric

Question:

From the list below, select the items that could pose concerns to someone wanting to participate in a key escrow service. Select all that apply.

Answer:

• Compromise due to extortion
• Compromise due to Insider threat

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Question:

Which attack from the list below entails an attacker determining the amount of time that a user takes to decrypt the message to find the key?

Answer:

time attack

Question:

Which attack commonly used against SSL involves an attacker capturing the cipher for the pre-shared key and then re-ciphering with an additional value?

Answer:

Bleichenbacher's attack

Question:

Select the common methods used to crack RSA from the list below. Select all that apply.

Answer:

• Factorizing N
• CRT

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Question:

A poor implementation of AES that involves keys being generated by a password makes it susceptible to which type of attack?

Answer:

brute force

Question:

An attacker tricks a victim user to sign for seemingly harmless messages, performs a mathematical calculation to ascertain the actual signature, and then uses the signature to sign items as the victim. What attack on cryptography does this scenario describe?

Answer:

Blinding Attack

Question:

Select the common methods used to crack RSA form the list below. Select two.

Answer:

• Side-channel attacks
• Factorization

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