WGU D344 PMHNP
Introduction To Cryptography
QUESTIONS AND VERIFIED
CORRECT ANSWERS
GRADED A+ [LATEST] 100%
GUARANTEED PASS
When setting up the table for use with the Playfair cipher, you should ensure no letters are
repeated and also be sure to omit which letter from the matrix?
J
None, all 26 letters must be included
Z
A - CORRECT ANSWER-J
A ____ generates a true random number and uses some form of random process. One approach
is to monitor the movements of a mouse pointer on a screen or from the pauses between
keystrokes. Overall the method is generally slow, especially if it involves human interaction, but
is non-deterministic and aperiodic.
Pseudo-random number generator (PRNG)
Deterministic random number generator (DRNG)
True random number generator (TRNG)
Periodic random number generator (PRNG) - CORRECT ANSWER-True random number
generator (TRNG)
,The aim of the ______ cipher is to scramble plaintext letters by writing a message in sequence
across a number of rails.
ROT-Rail
Rail Fence
ROT-13
Pigpen - CORRECT ANSWER-Rail Fence
Which simple cipher method attempts to bolster complexity by adding additional alphabets to
be used for the substitution rounds and can change its mapping depending on a variable
keyword?
mono-alphabetic
cipher disk
polyalphabet
Morse Code - CORRECT ANSWER-polyalphabet
Scrambled alphabet cipher schemes are easy to implement, but also easy to break mainly via
observation of what?
Letter and word frequency
Common images
Easily identifiable symbols
Key size - CORRECT ANSWER-Letter and word frequency
_____ is the largest positive integer that divides into two numbers without a remainder.
,GCD
OTP
MOD - CORRECT ANSWER-GCD
The ____ cipher adds complexity to employing grids for enciphering text by using four 5 by 5
matrices arranged in a square where each matrix contains 25 letters.
ADFGVX
BIFID
Five-by-Five Cipher
Four-square cipher - CORRECT ANSWER-Four-square cipher
________ is a polyalphabetic cipher that employs an improved code over the scrambled
alphabet approach, where a different mapping, based on a keyword, is used for each character
of the cipher.
ROT
Caesar cipher
Vigenère cipher
BIFID - CORRECT ANSWER-Vigenère cipher
Which type of random number generator would be the best choice if you were interested in
avoiding repeating to reduce the chances of a value being guessed?
Periodic random number generator (PRNG)
Pseudo-random number generator (PRNG)
, True random number generator (TRNG)
Deterministic random number generator (DRNG) - CORRECT ANSWER-True random number
generator (TRNG)
Shawn and his colleague collaborate on a project and keep the project information secret within
a file named "project1" encrypted with AES Crypt. The password is set to "1project". What
command would be used to decrypt the file to view its contents?
aescrypt -d project1
aescrypt -e project1
aesdecrypt project1 1project
aesdecrypt project1 - CORRECT ANSWER-aescrypt -d project1
What describes a cipher code mapping used only once and then discarded essentially making it
uncrackable?
Private key
One-time pad
Secret key
Initialization vector - CORRECT ANSWER-One-time pad
What type of code aims to overcome the ease at which letter and symbol probability in
ciphertext can be analyzed, by varying the number of codes mapped to each character?
Differential substitution code
Source Code
Homophonic substitution code
Pseudo code - CORRECT ANSWER-Homophonic substitution code
Introduction To Cryptography
QUESTIONS AND VERIFIED
CORRECT ANSWERS
GRADED A+ [LATEST] 100%
GUARANTEED PASS
When setting up the table for use with the Playfair cipher, you should ensure no letters are
repeated and also be sure to omit which letter from the matrix?
J
None, all 26 letters must be included
Z
A - CORRECT ANSWER-J
A ____ generates a true random number and uses some form of random process. One approach
is to monitor the movements of a mouse pointer on a screen or from the pauses between
keystrokes. Overall the method is generally slow, especially if it involves human interaction, but
is non-deterministic and aperiodic.
Pseudo-random number generator (PRNG)
Deterministic random number generator (DRNG)
True random number generator (TRNG)
Periodic random number generator (PRNG) - CORRECT ANSWER-True random number
generator (TRNG)
,The aim of the ______ cipher is to scramble plaintext letters by writing a message in sequence
across a number of rails.
ROT-Rail
Rail Fence
ROT-13
Pigpen - CORRECT ANSWER-Rail Fence
Which simple cipher method attempts to bolster complexity by adding additional alphabets to
be used for the substitution rounds and can change its mapping depending on a variable
keyword?
mono-alphabetic
cipher disk
polyalphabet
Morse Code - CORRECT ANSWER-polyalphabet
Scrambled alphabet cipher schemes are easy to implement, but also easy to break mainly via
observation of what?
Letter and word frequency
Common images
Easily identifiable symbols
Key size - CORRECT ANSWER-Letter and word frequency
_____ is the largest positive integer that divides into two numbers without a remainder.
,GCD
OTP
MOD - CORRECT ANSWER-GCD
The ____ cipher adds complexity to employing grids for enciphering text by using four 5 by 5
matrices arranged in a square where each matrix contains 25 letters.
ADFGVX
BIFID
Five-by-Five Cipher
Four-square cipher - CORRECT ANSWER-Four-square cipher
________ is a polyalphabetic cipher that employs an improved code over the scrambled
alphabet approach, where a different mapping, based on a keyword, is used for each character
of the cipher.
ROT
Caesar cipher
Vigenère cipher
BIFID - CORRECT ANSWER-Vigenère cipher
Which type of random number generator would be the best choice if you were interested in
avoiding repeating to reduce the chances of a value being guessed?
Periodic random number generator (PRNG)
Pseudo-random number generator (PRNG)
, True random number generator (TRNG)
Deterministic random number generator (DRNG) - CORRECT ANSWER-True random number
generator (TRNG)
Shawn and his colleague collaborate on a project and keep the project information secret within
a file named "project1" encrypted with AES Crypt. The password is set to "1project". What
command would be used to decrypt the file to view its contents?
aescrypt -d project1
aescrypt -e project1
aesdecrypt project1 1project
aesdecrypt project1 - CORRECT ANSWER-aescrypt -d project1
What describes a cipher code mapping used only once and then discarded essentially making it
uncrackable?
Private key
One-time pad
Secret key
Initialization vector - CORRECT ANSWER-One-time pad
What type of code aims to overcome the ease at which letter and symbol probability in
ciphertext can be analyzed, by varying the number of codes mapped to each character?
Differential substitution code
Source Code
Homophonic substitution code
Pseudo code - CORRECT ANSWER-Homophonic substitution code
