WGU D830/D334 OBJECTIVE
ASSESSMENT FINAL NEWEST 2026
ACTUAL EXAM TEST BANK | WGU
D830/D334 INTRO TO CRYPTOGRAPHY
OA FINAL REVIEW WITH 250 REAL EXAM .
1. What is the primary purpose of cryptography?
A. Increase network bandwidth
B. Protect information through mathematical techniques
C. Eliminate the need for authentication
D. Replace all access-control mechanisms
Answer: B. Protect information through mathematical techniques
Rationale: Cryptography uses mathematical algorithms and keys to
protect information and support confidentiality, integrity,
authentication, and related security goals.
2. Which security property ensures that unauthorized individuals
cannot read protected information?
A. Integrity
B. Availability
C. Confidentiality
D. Nonrepudiation
Answer: C. Confidentiality
Rationale: Confidentiality prevents unauthorized disclosure of
information.
,3. Which property ensures that data has not been altered without
authorization?
A. Integrity
B. Availability
C. Confidentiality
D. Obfuscation
Answer: A. Integrity
Rationale: Integrity provides assurance that information remains
accurate and has not been improperly modified.
4. Which security objective ensures that authorized users can
access systems when needed?
A. Confidentiality
B. Availability
C. Nonrepudiation
D. Authentication
Answer: B. Availability
Rationale: Availability concerns reliable and timely access to
information and systems.
5. What is plaintext?
A. Encrypted data
B. A cryptographic key
C. Data in its original readable form
D. A digital signature
Answer: C. Data in its original readable form
Rationale: Plaintext is the original information before encryption.
,6. What is ciphertext?
A. The original unencrypted message
B. Data transformed by an encryption algorithm
C. A password database
D. A cryptographic hash function
Answer: B. Data transformed by an encryption algorithm
Rationale: Encryption transforms plaintext into ciphertext so that the
information is not readily understandable.
7. What process converts plaintext into ciphertext?
A. Decryption
B. Hashing
C. Encryption
D. Authentication
Answer: C. Encryption
Rationale: Encryption transforms readable plaintext into protected
ciphertext.
8. What process converts ciphertext back into plaintext?
A. Encryption
B. Decryption
C. Hashing
D. Salting
Answer: B. Decryption
Rationale: Decryption reverses encryption when the appropriate key
and algorithm are available.
, 9. In modern cryptography, what should normally remain secret?
A. The cryptographic algorithm
B. The key
C. The ciphertext format
D. The protocol name
Answer: B. The key
Rationale: Secure cryptographic designs generally assume the
algorithm may be publicly known while the cryptographic key
remains protected.
10. Which principle states that a cryptosystem should remain
secure even if the algorithm is publicly known?
A. Kerckhoffs's principle
B. Least privilege
C. Separation of duties
D. Complete mediation
Answer: A. Kerckhoffs's principle
Rationale: Kerckhoffs's principle states that security should depend
on the secrecy of the key rather than secrecy of the algorithm.
11. Which term describes attempting to recover plaintext or keys
without authorized access?
A. Cryptanalysis
B. Compression
C. Encoding
D. Tokenization
Answer: A. Cryptanalysis
ASSESSMENT FINAL NEWEST 2026
ACTUAL EXAM TEST BANK | WGU
D830/D334 INTRO TO CRYPTOGRAPHY
OA FINAL REVIEW WITH 250 REAL EXAM .
1. What is the primary purpose of cryptography?
A. Increase network bandwidth
B. Protect information through mathematical techniques
C. Eliminate the need for authentication
D. Replace all access-control mechanisms
Answer: B. Protect information through mathematical techniques
Rationale: Cryptography uses mathematical algorithms and keys to
protect information and support confidentiality, integrity,
authentication, and related security goals.
2. Which security property ensures that unauthorized individuals
cannot read protected information?
A. Integrity
B. Availability
C. Confidentiality
D. Nonrepudiation
Answer: C. Confidentiality
Rationale: Confidentiality prevents unauthorized disclosure of
information.
,3. Which property ensures that data has not been altered without
authorization?
A. Integrity
B. Availability
C. Confidentiality
D. Obfuscation
Answer: A. Integrity
Rationale: Integrity provides assurance that information remains
accurate and has not been improperly modified.
4. Which security objective ensures that authorized users can
access systems when needed?
A. Confidentiality
B. Availability
C. Nonrepudiation
D. Authentication
Answer: B. Availability
Rationale: Availability concerns reliable and timely access to
information and systems.
5. What is plaintext?
A. Encrypted data
B. A cryptographic key
C. Data in its original readable form
D. A digital signature
Answer: C. Data in its original readable form
Rationale: Plaintext is the original information before encryption.
,6. What is ciphertext?
A. The original unencrypted message
B. Data transformed by an encryption algorithm
C. A password database
D. A cryptographic hash function
Answer: B. Data transformed by an encryption algorithm
Rationale: Encryption transforms plaintext into ciphertext so that the
information is not readily understandable.
7. What process converts plaintext into ciphertext?
A. Decryption
B. Hashing
C. Encryption
D. Authentication
Answer: C. Encryption
Rationale: Encryption transforms readable plaintext into protected
ciphertext.
8. What process converts ciphertext back into plaintext?
A. Encryption
B. Decryption
C. Hashing
D. Salting
Answer: B. Decryption
Rationale: Decryption reverses encryption when the appropriate key
and algorithm are available.
, 9. In modern cryptography, what should normally remain secret?
A. The cryptographic algorithm
B. The key
C. The ciphertext format
D. The protocol name
Answer: B. The key
Rationale: Secure cryptographic designs generally assume the
algorithm may be publicly known while the cryptographic key
remains protected.
10. Which principle states that a cryptosystem should remain
secure even if the algorithm is publicly known?
A. Kerckhoffs's principle
B. Least privilege
C. Separation of duties
D. Complete mediation
Answer: A. Kerckhoffs's principle
Rationale: Kerckhoffs's principle states that security should depend
on the secrecy of the key rather than secrecy of the algorithm.
11. Which term describes attempting to recover plaintext or keys
without authorized access?
A. Cryptanalysis
B. Compression
C. Encoding
D. Tokenization
Answer: A. Cryptanalysis
