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WGU C839 INTRO TO CRYPTOGRAPHY EXAM
2025 UPDATED ACTUAL EXAM WITH
CORRECT SOLUTIONS.
What type of encryption uses different keys to encrypt and
decrypt the message?
A Symmetric
B Private key
C Secure
D Asymmetric - correct answer- D
The most widely used asymmetric encryption algorithm is
what?
A RSA
B Vigenere
C DES
D Caesar Cipher - correct answer- A
Original, unencrypted information is referred to as ____.
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A text
B plaintext
C cleantext
D ciphertext - correct answer- B
Which of the following is NOT an asymmetric system?
A PGP
B RSA
C SSL
D DES - correct answer- D
In order for User A to send User B an encrypted message that
only User B can read, User A must encrypt message with which
of the following keys?
A User A's public key
B User A's private key
C User B's public key
D User B's private key - correct answer- C
The greatest weakness with symmetric algorithms is _____.
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A They are less secure than asymmetric
B The problem of key exchange
C They are slower than asymmetric
D The problem of generating keys - correct answer- B
Which of the following is generally true about block sizes?
A Smaller block sizes increase security
B Block sizes must be more than 256 bits to be secure
C Block size is irrelevant to security
D Larger block sizes increase security - correct answer- D
A _____ is a function that takes a variable-size input m and
returns a fixed-size string.
A Symmetric cipher
B Hash
C Asymmetric cipher
D Feistel - correct answer- B
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Which of the following is a cryptographic protocol that allows
two parties to establish a shared key over an insecure channel?
A Elliptic Curve
B RSA
C MD5
D Diffie-Hellman - correct answer- D
A _________ is a digital representation of information that
identifies you as a relevant entity by a trusted third party?
A Digital Signature
B Hash
C Ownership stamp
D Digest - correct answer- A
What is the standard used by most digital certificates?
A X.509
B CRL
C RFC 2298
D OCSP - correct answer- A
WGU C839 INTRO TO CRYPTOGRAPHY EXAM
2025 UPDATED ACTUAL EXAM WITH
CORRECT SOLUTIONS.
What type of encryption uses different keys to encrypt and
decrypt the message?
A Symmetric
B Private key
C Secure
D Asymmetric - correct answer- D
The most widely used asymmetric encryption algorithm is
what?
A RSA
B Vigenere
C DES
D Caesar Cipher - correct answer- A
Original, unencrypted information is referred to as ____.
,2 | Page
A text
B plaintext
C cleantext
D ciphertext - correct answer- B
Which of the following is NOT an asymmetric system?
A PGP
B RSA
C SSL
D DES - correct answer- D
In order for User A to send User B an encrypted message that
only User B can read, User A must encrypt message with which
of the following keys?
A User A's public key
B User A's private key
C User B's public key
D User B's private key - correct answer- C
The greatest weakness with symmetric algorithms is _____.
,3 | Page
A They are less secure than asymmetric
B The problem of key exchange
C They are slower than asymmetric
D The problem of generating keys - correct answer- B
Which of the following is generally true about block sizes?
A Smaller block sizes increase security
B Block sizes must be more than 256 bits to be secure
C Block size is irrelevant to security
D Larger block sizes increase security - correct answer- D
A _____ is a function that takes a variable-size input m and
returns a fixed-size string.
A Symmetric cipher
B Hash
C Asymmetric cipher
D Feistel - correct answer- B
, 4 | Page
Which of the following is a cryptographic protocol that allows
two parties to establish a shared key over an insecure channel?
A Elliptic Curve
B RSA
C MD5
D Diffie-Hellman - correct answer- D
A _________ is a digital representation of information that
identifies you as a relevant entity by a trusted third party?
A Digital Signature
B Hash
C Ownership stamp
D Digest - correct answer- A
What is the standard used by most digital certificates?
A X.509
B CRL
C RFC 2298
D OCSP - correct answer- A
