WGU C839 OBJECTIVE ASSESSMENT 2 LATEST VERSIONS (VERSION A & B) /WGU C839 INTRODUCTION TO CRYPTOGRAPHY OA ACTUAL EXAM
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Course
WGU C839
Institution
WGU C839
WGU C839 OBJECTIVE ASSESSMENT 2
LATEST VERSIONS (VERSION A & B)
/WGU C839 INTRODUCTION
TO CRYPTOGRAPHY OA ACTUAL
EXAM
Which encryption standard uses the same key to encrypt and decrypt messages? -
answerSymmetric
Which algorithm is designated as a Type 2 product by the National Security Age...
WGU C839 OBJECTIVE ASSESSMENT 2
LATEST VERSIONS (VERSION A & B)
2024-2025 /WGU C839 INTRODUCTION
TO CRYPTOGRAPHY OA ACTUAL
EXAM
Which encryption standard uses the same key to encrypt and decrypt messages? -
answer✔Symmetric
Which algorithm is designated as a Type 2 product by the National Security Agency (NSA)? -
answer✔Skipjack
What is the most commonly used format for certificates? - answer✔X.509 v3
What is referenced to determine if a certificate has been revoked? - answer✔Certificate
revocation list (CRL)
What needs to be installed on end users' computers to allow them to trust applications that have
been digitally signed by the developer? - answer✔Sender's public key
Which type of certificate must be certified by an authority to verify it with other participants? -
answer✔Public Certificate
What is an attribute of the Rivest Cipher 4 (RC4) algorithm? - answer✔It requires a unique
nonce.
Which mode generates the key stream with a nonce and incrementing value? - answer✔Counter
(CTR)
Which mode is a stream algorithm that concatenates an incrementing value with a nonce? -
answer✔Counter (CTR)
Which key would an administrator use to encrypt data so only the CEO can decrypt it? -
answer✔CEO's public key
What is the result of a hash function? - answer✔Digest
What is used to efficiently encrypt large files? - answer✔Symmetric encryption
An administrator needs to encrypt the following word with the Atbash cipher: security What is
the correct ciphertext? - answer✔hvxfirgb
Which cryptographic algorithm has a 128-bit hash size? - answer✔Message Digest Algorithm 5
(MD5)
Which characteristic makes a hashing function suitable for use in signature schemes? -
answer✔Collision resistance
Which attribute of a hashing function makes a birthday attack possible? - answer✔Partial-
message collision
Which hash algorithm produces a 160-bit output value? - answer✔SHA-1
What does cipher block chaining (CBC) use with the key to encrypt subsequent blocks of
plaintext? - answer✔Previous generated ciphertext
Which mode produces the same ciphertext from two identical plaintext blocks? -
answer✔Electronic codebook (ECB)
Which encryption mode is least secure? - answer✔Electronic codebook (ECB)
What is the mathematical formula used for symmetric decryption? - answer✔P = E (K,C)
Which algorithm relies on factoring the product of large prime numbers? - answer✔Rivest-
Shamir-Adleman
Which encryption technology is a serial combination of hashing, data compression, symmetric-
key cryptography, and public key infrastructure (PKI) and can be used for encrypting texts,
emails, files, and directories or for full disk encryption? - answer✔Pretty Good Privacy (PGP)
Which concept stipulates that algorithms should be openly shared and scrutinized, but keys must
be absolutely secured? - answer✔Kerckhoffs's principle
Which encryption process minimizes known plaintext attacks against Advanced Encryption
Standard (AES)? - answer✔Randomizing the initialization vector
What prevents a rainbow table attack during the encryption process? - answer✔Salting
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