WGU C839 INTRO TO CRYPTOGRAPHY FINAL
EXAM 2025/2026 BANK 2 VERSIONS
QUESTIONS AND ACCURATE ACTUAL EXAM
WITH FREQUENTLY TESTED QUESTIONS AND
STUDY GUIDE / EXPERT VERIFIED FOR
GUARANTEED PASS/ALREADY GRADED A+
Which of the following is a substitution cipher used by
ancient Hebrew scholars?
A Caesar
B Vigenere
C Scytale
D Atbash - ....ANSWER...D
Shifting each letter in the alphabet a fixed number of
spaces to the right or left is an example of what?
A Bit shifting
B Confusion
,C Multi substitution
D Single substitution - ....ANSWER...D
Which of the following most accurately defines
encryption?
A changing a message so it can only be easily read by the
intended recipient
B Making binary changes to a message to conceal it
C changing a message using complex mathematics
D Applying keys to plain text - ....ANSWER...A
If you use substitution alone, what weakness is present in
the resulting cipher text?
A It is the same length as the original text
B It is easily broken with modern computers.
,C It is too simple.
D Because it maintains letter and word frequency. -
....ANSWER...D
_____ uses at least two different shifts, changing the shift
with different letters in the plain text.
A Atbash
B multi-alphabet encryption
C Scytale
D Caesar cipher - ....ANSWER...B
____ was designed to provide built in cryptography for the
clipper chip.
A Blowfish
B Skipjack
C GOST
D 3DES - ....ANSWER...B
, Which of the following uses an 80 bit key on 64 bit blocks?
A Twofish
B AES
C Skipjack
D DES - ....ANSWER...C
With _____, the message is divided into blocks and each
block is encrypted separately. This is the most basic mode
for symmetric encryption.
A Electronic codebook (ECB)
B Cipher-block chaining (CBC)
C Cipher feedback (CFB)
D Output feedback (OFB) - ....ANSWER...A
Which of the following is an example of an unbalanced
Feistel?
A 3DES
EXAM 2025/2026 BANK 2 VERSIONS
QUESTIONS AND ACCURATE ACTUAL EXAM
WITH FREQUENTLY TESTED QUESTIONS AND
STUDY GUIDE / EXPERT VERIFIED FOR
GUARANTEED PASS/ALREADY GRADED A+
Which of the following is a substitution cipher used by
ancient Hebrew scholars?
A Caesar
B Vigenere
C Scytale
D Atbash - ....ANSWER...D
Shifting each letter in the alphabet a fixed number of
spaces to the right or left is an example of what?
A Bit shifting
B Confusion
,C Multi substitution
D Single substitution - ....ANSWER...D
Which of the following most accurately defines
encryption?
A changing a message so it can only be easily read by the
intended recipient
B Making binary changes to a message to conceal it
C changing a message using complex mathematics
D Applying keys to plain text - ....ANSWER...A
If you use substitution alone, what weakness is present in
the resulting cipher text?
A It is the same length as the original text
B It is easily broken with modern computers.
,C It is too simple.
D Because it maintains letter and word frequency. -
....ANSWER...D
_____ uses at least two different shifts, changing the shift
with different letters in the plain text.
A Atbash
B multi-alphabet encryption
C Scytale
D Caesar cipher - ....ANSWER...B
____ was designed to provide built in cryptography for the
clipper chip.
A Blowfish
B Skipjack
C GOST
D 3DES - ....ANSWER...B
, Which of the following uses an 80 bit key on 64 bit blocks?
A Twofish
B AES
C Skipjack
D DES - ....ANSWER...C
With _____, the message is divided into blocks and each
block is encrypted separately. This is the most basic mode
for symmetric encryption.
A Electronic codebook (ECB)
B Cipher-block chaining (CBC)
C Cipher feedback (CFB)
D Output feedback (OFB) - ....ANSWER...A
Which of the following is an example of an unbalanced
Feistel?
A 3DES
