WGU C839 - INTRO TO CRYPTOGRAPHY - PRE-
ASSESSMENT & VOCABULARY EXAM QUESTIONS
AND 100% CORRECT ANSWERS (A+) 2025
Which encryption standard uses the same key to encrypt and decrypt messages?
A Asymmetric Key Encryption
B Symmetric Key Encryption
C Public Certificate
D CRL
B
Which algorithm is designated as a Type 2 product by the National Security
Agency (NSA)?
A DES
B AES
C SKIPJACK
D WEP
C
What is the most commonly used format for certificates?
A X.509 v2
B X.509 v3
C sha-1
D sha-2
B
What is referenced to determine if a certificate has been revoked?
A Certificate Revocation List
B Certificate Revocation Authority
C Certificate Approver
D Revocation List
,A
What needs to be installed on end users' computers to allow them to trust
applications that have been digitally signed by the developer?
A Sender's public key
B Sender's private key
C Receiver's public key
D Receiver's private key
A
Which type of certificate must be certified by an authority to verify it with other
participants?
A Public Certificate
B Private Certificate
C Certificate Provider
D Revocation Authority
A
What is an attribute of the Rivest Cipher 4 (RC4) algorithm?
A It performs CRC after every iteration
B Salting is performed.
C It requires a unique nonce.
D It does not require a unique nonce.
C
Which mode generates the key stream with a nonce and incrementing value?
A Certificate Revocation List (CRL)
B Nonce mode
C Rivest Cipher 4 (RC4)
D Counter (CTR)
D
, Which mode is a stream algorithm that concatenates an incrementing value with a
nonce?
A CAT
B Nonce
C Counter (CTR)
D RC4
C
Which key would an administrator use to encrypt data so only the CEO can
decrypt it?
A CEO's public key
B CEO's private key
C Administrator's private key
D Administrator's public key
A
What is the result of a hash function?
A RC4
B Public key
C decryption
D Digest
D
What is used to efficiently encrypt large files?
A Asymmetric Encryption
B Hashing
C Symmetric Encryption
D RC4
C
ASSESSMENT & VOCABULARY EXAM QUESTIONS
AND 100% CORRECT ANSWERS (A+) 2025
Which encryption standard uses the same key to encrypt and decrypt messages?
A Asymmetric Key Encryption
B Symmetric Key Encryption
C Public Certificate
D CRL
B
Which algorithm is designated as a Type 2 product by the National Security
Agency (NSA)?
A DES
B AES
C SKIPJACK
D WEP
C
What is the most commonly used format for certificates?
A X.509 v2
B X.509 v3
C sha-1
D sha-2
B
What is referenced to determine if a certificate has been revoked?
A Certificate Revocation List
B Certificate Revocation Authority
C Certificate Approver
D Revocation List
,A
What needs to be installed on end users' computers to allow them to trust
applications that have been digitally signed by the developer?
A Sender's public key
B Sender's private key
C Receiver's public key
D Receiver's private key
A
Which type of certificate must be certified by an authority to verify it with other
participants?
A Public Certificate
B Private Certificate
C Certificate Provider
D Revocation Authority
A
What is an attribute of the Rivest Cipher 4 (RC4) algorithm?
A It performs CRC after every iteration
B Salting is performed.
C It requires a unique nonce.
D It does not require a unique nonce.
C
Which mode generates the key stream with a nonce and incrementing value?
A Certificate Revocation List (CRL)
B Nonce mode
C Rivest Cipher 4 (RC4)
D Counter (CTR)
D
, Which mode is a stream algorithm that concatenates an incrementing value with a
nonce?
A CAT
B Nonce
C Counter (CTR)
D RC4
C
Which key would an administrator use to encrypt data so only the CEO can
decrypt it?
A CEO's public key
B CEO's private key
C Administrator's private key
D Administrator's public key
A
What is the result of a hash function?
A RC4
B Public key
C decryption
D Digest
D
What is used to efficiently encrypt large files?
A Asymmetric Encryption
B Hashing
C Symmetric Encryption
D RC4
C
