Page 1 of 44
WGU D334 CRYPTOGRAPHY ALL EXAM 2025|
BRAND NEW ACTUAL EXAM WITH 100%
VERIFIED QUESTIONS AND CORRECT
SOLUTIONS| GUARANTEED VALUE PACK| ACE
YOUR GRADES.
In lightweight cryptography, block sizes are relatively smaller than
those used in conventional cryptography and are typically how many
bits? Select all that apply.
90
128
64
80
64 and 80
think its lightweight so 64 to 80
Bifid Cipher
Makes use of a grid and which maps the letters into numeric values. A
more complex version uses a 5x5 square where each matrix uses 25
letters
Playfair Cipher
A 5x5 grid created with a secret phrase (Letters cannot repeat in Grid)
nappierrun
Homophonic substitution cipher
cipher that replaces plaintext with multiple different cipher texts
Caesar coding cipher
A Caesar cipher is a simple method of encoding messages. Caesar
ciphers use a substitution method where letters in the alphabet are shifted
by some fixed number of spaces to yield an encoding alphabet. A Caesar
, Page 2 of 44
cipher with a shift of 1 would encode an A as a B, an M as an N, and a Z as
an A, and so on.
Scrambled Alphabet
each letter is connected to a different letter.
For ex, A goes to B
, B goes to T, etc.......
Vignere Cipher what is it and how was it cracked?
a method of encrypting text by applying a series of Caesar ciphers based
on the letters of a keyword. So it uses multiple alphabet ciphers essentially.
cracked with kasiski examination to determine the key length
fractioned morse code
uses 26 character key mapping and coverts plaintext into morse code into
fixed length chunks. Then converted to cipher text letters.
Pig Pen Cipher
Uses a monolithic alphabetic substitution method.
The Pigpen cipher is a type of code where each letter of the alphabet is
replaced with a symbol. These symbols come from a grid or pattern that
looks like a tic-tac-toe board or Xs. You write your message using these
symbols instead of regular letters. It's a simple way to turn a plain message
into a secret code.
What is the pig pen vulnerability?
Once the mapping is known, it is difficult to keep the message a secret
Rail Fence Cipher
Ciphers that write message letters out diagonally over a number of rows
then read off cipher row by row.
Combinations
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represent selection of items from a larger set without regard to the order in
which they're chosen. Does not care the order of selections. If we have 3
countries (america, iceland, Germany) There are 3 combos of 2 countries.
permutations
an arrangement of objects in a specific order. AKA a reordering of those
objects
set theory
A set is a well defined collection of distinct objects. Called elements or
members, which can be anything. Numbers, colors, even other sets. Sets
are typically denoted with curly braces. ex. A={1,2,3}
OTP
One-Time Pad
cipher that is only used once. Near uncrackable cipher that uses a code
book that both parties know.
Explain each form of Data
ASCII
Computer
UTF-16
Computers read data in binary
ASCII is 8 bit values and supports 256 different characters (2^8)
UTF-16 extends to 16 values. 65,536 or 2^16
Reed solomon
More complex data integrity to detect and correct them. Typically used in
higher level protocols
Huffman coding
compress data by looking for patterns in binary or meta data
Lempel-Viz Welsh (LZW)
Adaptive dictionary compression technique known as LZ-77 coding. It is the
basis for many popular compression methods, Suited for a high degree of
repetition
, Page 4 of 44
how does LZ-78 differ from LZ-77
Builds a dictionary of frequently used characters.
ex. The receiver needs a receipt.
recei would be used multiple times.
little endian vs big endian
Both refer to the order of bytes stored depending on computer architecture
type.
Little is the least signifigant byte is stored in the lowest memory address
Big is used in IBM z/Architecture mainframes. The most signifigant byte is
stored in the lowest memory address
A major disadvantage associated with symmetric encryption centers
around the need to do what?
Exchange the secret key
Exchange the public key
Manage the key pair
Manage the public key
Exchange the secret key
Blowfish vs Twofish
Both are unpatented for anyone to use for symmetric private key
encryption,
Blowfish:
Block size 64 (in bits)
key size 32 to 448. (in bits) common values are 128, 192, 256
16 rounds
two fish is the same except block size 128
key size 1 to 256 common values are 128,192 or 256
both have 16 rounds
ECB
Electronic Code Book mode--The simplest and weakest mode of DES.
WGU D334 CRYPTOGRAPHY ALL EXAM 2025|
BRAND NEW ACTUAL EXAM WITH 100%
VERIFIED QUESTIONS AND CORRECT
SOLUTIONS| GUARANTEED VALUE PACK| ACE
YOUR GRADES.
In lightweight cryptography, block sizes are relatively smaller than
those used in conventional cryptography and are typically how many
bits? Select all that apply.
90
128
64
80
64 and 80
think its lightweight so 64 to 80
Bifid Cipher
Makes use of a grid and which maps the letters into numeric values. A
more complex version uses a 5x5 square where each matrix uses 25
letters
Playfair Cipher
A 5x5 grid created with a secret phrase (Letters cannot repeat in Grid)
nappierrun
Homophonic substitution cipher
cipher that replaces plaintext with multiple different cipher texts
Caesar coding cipher
A Caesar cipher is a simple method of encoding messages. Caesar
ciphers use a substitution method where letters in the alphabet are shifted
by some fixed number of spaces to yield an encoding alphabet. A Caesar
, Page 2 of 44
cipher with a shift of 1 would encode an A as a B, an M as an N, and a Z as
an A, and so on.
Scrambled Alphabet
each letter is connected to a different letter.
For ex, A goes to B
, B goes to T, etc.......
Vignere Cipher what is it and how was it cracked?
a method of encrypting text by applying a series of Caesar ciphers based
on the letters of a keyword. So it uses multiple alphabet ciphers essentially.
cracked with kasiski examination to determine the key length
fractioned morse code
uses 26 character key mapping and coverts plaintext into morse code into
fixed length chunks. Then converted to cipher text letters.
Pig Pen Cipher
Uses a monolithic alphabetic substitution method.
The Pigpen cipher is a type of code where each letter of the alphabet is
replaced with a symbol. These symbols come from a grid or pattern that
looks like a tic-tac-toe board or Xs. You write your message using these
symbols instead of regular letters. It's a simple way to turn a plain message
into a secret code.
What is the pig pen vulnerability?
Once the mapping is known, it is difficult to keep the message a secret
Rail Fence Cipher
Ciphers that write message letters out diagonally over a number of rows
then read off cipher row by row.
Combinations
, Page 3 of 44
represent selection of items from a larger set without regard to the order in
which they're chosen. Does not care the order of selections. If we have 3
countries (america, iceland, Germany) There are 3 combos of 2 countries.
permutations
an arrangement of objects in a specific order. AKA a reordering of those
objects
set theory
A set is a well defined collection of distinct objects. Called elements or
members, which can be anything. Numbers, colors, even other sets. Sets
are typically denoted with curly braces. ex. A={1,2,3}
OTP
One-Time Pad
cipher that is only used once. Near uncrackable cipher that uses a code
book that both parties know.
Explain each form of Data
ASCII
Computer
UTF-16
Computers read data in binary
ASCII is 8 bit values and supports 256 different characters (2^8)
UTF-16 extends to 16 values. 65,536 or 2^16
Reed solomon
More complex data integrity to detect and correct them. Typically used in
higher level protocols
Huffman coding
compress data by looking for patterns in binary or meta data
Lempel-Viz Welsh (LZW)
Adaptive dictionary compression technique known as LZ-77 coding. It is the
basis for many popular compression methods, Suited for a high degree of
repetition
, Page 4 of 44
how does LZ-78 differ from LZ-77
Builds a dictionary of frequently used characters.
ex. The receiver needs a receipt.
recei would be used multiple times.
little endian vs big endian
Both refer to the order of bytes stored depending on computer architecture
type.
Little is the least signifigant byte is stored in the lowest memory address
Big is used in IBM z/Architecture mainframes. The most signifigant byte is
stored in the lowest memory address
A major disadvantage associated with symmetric encryption centers
around the need to do what?
Exchange the secret key
Exchange the public key
Manage the key pair
Manage the public key
Exchange the secret key
Blowfish vs Twofish
Both are unpatented for anyone to use for symmetric private key
encryption,
Blowfish:
Block size 64 (in bits)
key size 32 to 448. (in bits) common values are 128, 192, 256
16 rounds
two fish is the same except block size 128
key size 1 to 256 common values are 128,192 or 256
both have 16 rounds
ECB
Electronic Code Book mode--The simplest and weakest mode of DES.
