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WGU C839 EXAM 2024 QUESTIONS AND ANSWERS
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WGU C839 EXAM 2024 QUESTIONS AND ANSWERS
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WGU C839 EXAMWhich combination of cryptographic algorithms is used to create digital
signatures based on the U.S. Digital Signature Standards?
A SHA-2 and AES
B SHA-1 and AES
C AES and RSA
D SHA-2 and RSA
D
proving where a message came from
proof of origin
the concept of removing the ability of a person to deny sending a message
non-repudiation
the infrastructure that enables the usage of certificates to identify entities
public-key infrastructure (PKI)
Cryptography provides various security benefits. Which cryptographic benefit is
used in e-commerce to provide proof that a customer cannot deny being the
source of a transaction?
A Proof of origin
B Confidentiality
,C Integrity
D Non-repudiation
D
A developer wants to send a message to a system administrator over the internet,
so the developer uses the system administrator's publicly known key to send the
message. The system administrator is able to decrypt the message using a unique
private key. Which encryption method are the developer and system
administrator using to communicate the message?
A Stream encryption
B Asymmetric encryption
C Block encryption
D Symmetric encryption
B
A developer wants to send a system administrator an encrypted message but is
concerned that an intruder might copy the encrypted message and play back the
ciphertext to decode the original message. How can the developer make sure that
the ciphertext does not give the original plaintext if played back?
A Use shift row transformation
B Use electronic code book
C Use RC5 cipher
D Add salt with an initialization vector
D
,Which method of encryption uses a polyalphabetic substitution cipher to encrypt
a plaintext message?
A Vigenère cipher
B BIFID cipher
C Pigpen cipher
D Caesar cipher
A
Which two pioneers are called the fathers of asymmetric cryptography used in
PKI?
A Sir Francis Bacon and Alan Turin
B Will Friedman and Ron Rivest
C Whitfield Diffie and Martin Hellman
D Thomas Jefferson and Blaise de Vigenère
C
Which cryptographic cipher is stream-based?
A RC2
B RC5
C RC6
D RC4
, D
What type of encryption uses different keys to encrypt and decrypt the message?
A Symmetric
B Private key
C Secure
D Asymmetric
D
The most widely used asymmetric encryption algorithm is what?
A RSA
B Vigenere
C DES
D Caesar Cipher
A
Original, unencrypted information is referred to as ____.
A text
B plaintext
C cleantext
D ciphertext
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