WGU D334 OBJECTIVE ASSESSMENT
COMPREHENSIVE REVIEW 2026 TESTED
QUESTIONS GRADED A+
⩥ asymmetric key-based encryption
-typical methods. Answer: RSA
DSA
El Gamal
⩥ Symmetric key-based encryption
-Typical Methods. Answer: RC2- 40 bit key size 64 bit block
RC4- (Stream Cipher)- Used in SSL and WEP
RC5- (Variable Key size, 32, 64, or 128 bit block size)
AES- (128, 192 or 256 bit key size, 128 bit block size)
DES- (56 bit key size. 64 bit Block size)
3DES- (112 bit key size, 64 bit block size)
⩥ Block Encryption. Answer: RC2(40 bit key size)
RC5(Variable block size)
IDEA
DES
,3DES
AES (Rijndael)
Blowfish
twofish
⩥ stream encryption. Answer: RC4
Chacha
⩥ Rainbow Attack. Answer: The method of knowing the mapping
between the hashed values and the original data
⩥ Dictionary-type attack. Answer: a brute force analysis
⩥ ∉. Answer: does not belong to
when an object is not in a set
⩥ ∈. Answer: Belongs to
when an object is within a set
⩥ ⊆. Answer: subset
subset has fewer elements or equal to the set
,⩥ A ∪ B. Answer: union (objects that belong to set A or set B)
⩥ |. Answer: such that
⩥ A ∩ B. Answer: Intersection: in both A and B
⩥ Enigma Machine -Cypher 10. Answer: Used a polyalphabetic
substitution cipher, which did not repeat within a reasonable time period,
along with a secret key. For the cracking of the Enigma cipher, the
challenge was thus to determine both the algorithm used and the key.
Enigma's main weakness, though, was that none of the plain text letters
could be ciphered as itself.
⩥ Four-square cipher9. Answer: Uses four 5 × 5 matrices arranged in a
square, are where each matrix contains 25 letters for encoding and
decoding operations.
⩥ One-time pad cypher8. Answer: Cypher Code mapping that is only
used once.
Advantage: it is essentially unbreakable.
Disadvantage: it takes lots of work as you would have to generate the
pad to be used, each time.
⩥ Vigenere Cipher 7. Answer: Polyalphabetic cipher that involves using
a different mapping, based on a keyword, for each character of the
, cipher. An advantage of this type of cipher is that the same plaintext
character is likely to be coded to different mappings, depending on the
position of the keyword, making guessing more difficult.
⩥ Ceasar Cipher6. Answer: Mono-alphabetic substitution cipher known
as "shift" cipher. Involves plaintext being replaced by a letter some fixed
number of positions down the alphabet. i.e., a Caesar Cipher using a
shift of +3 would mean a plaintext letter A would result in a ciphertext
letter D (a shift of three positions to the right in the alphabet)
⩥ Morse Code cipher 5. Answer: Encoding method, rather than a cipher,
that works by translating characters into sequences of dots (.) and dashes
(-)
⩥ Playfair Cipher 4. Answer: 5 × 5 matrix containing the alphabet less
the letter J. Cipher/decipher process consists of a set of rules outlining
use of column and row combinations.
⩥ BIFID Cipher 3. Answer: Makes use of a grid and which maps the
letters into numeric values.
⩥ Rail Code Cipher 2. Answer: Employs a method to scramble text by
writing it in a sequence across a number of rails.
COMPREHENSIVE REVIEW 2026 TESTED
QUESTIONS GRADED A+
⩥ asymmetric key-based encryption
-typical methods. Answer: RSA
DSA
El Gamal
⩥ Symmetric key-based encryption
-Typical Methods. Answer: RC2- 40 bit key size 64 bit block
RC4- (Stream Cipher)- Used in SSL and WEP
RC5- (Variable Key size, 32, 64, or 128 bit block size)
AES- (128, 192 or 256 bit key size, 128 bit block size)
DES- (56 bit key size. 64 bit Block size)
3DES- (112 bit key size, 64 bit block size)
⩥ Block Encryption. Answer: RC2(40 bit key size)
RC5(Variable block size)
IDEA
DES
,3DES
AES (Rijndael)
Blowfish
twofish
⩥ stream encryption. Answer: RC4
Chacha
⩥ Rainbow Attack. Answer: The method of knowing the mapping
between the hashed values and the original data
⩥ Dictionary-type attack. Answer: a brute force analysis
⩥ ∉. Answer: does not belong to
when an object is not in a set
⩥ ∈. Answer: Belongs to
when an object is within a set
⩥ ⊆. Answer: subset
subset has fewer elements or equal to the set
,⩥ A ∪ B. Answer: union (objects that belong to set A or set B)
⩥ |. Answer: such that
⩥ A ∩ B. Answer: Intersection: in both A and B
⩥ Enigma Machine -Cypher 10. Answer: Used a polyalphabetic
substitution cipher, which did not repeat within a reasonable time period,
along with a secret key. For the cracking of the Enigma cipher, the
challenge was thus to determine both the algorithm used and the key.
Enigma's main weakness, though, was that none of the plain text letters
could be ciphered as itself.
⩥ Four-square cipher9. Answer: Uses four 5 × 5 matrices arranged in a
square, are where each matrix contains 25 letters for encoding and
decoding operations.
⩥ One-time pad cypher8. Answer: Cypher Code mapping that is only
used once.
Advantage: it is essentially unbreakable.
Disadvantage: it takes lots of work as you would have to generate the
pad to be used, each time.
⩥ Vigenere Cipher 7. Answer: Polyalphabetic cipher that involves using
a different mapping, based on a keyword, for each character of the
, cipher. An advantage of this type of cipher is that the same plaintext
character is likely to be coded to different mappings, depending on the
position of the keyword, making guessing more difficult.
⩥ Ceasar Cipher6. Answer: Mono-alphabetic substitution cipher known
as "shift" cipher. Involves plaintext being replaced by a letter some fixed
number of positions down the alphabet. i.e., a Caesar Cipher using a
shift of +3 would mean a plaintext letter A would result in a ciphertext
letter D (a shift of three positions to the right in the alphabet)
⩥ Morse Code cipher 5. Answer: Encoding method, rather than a cipher,
that works by translating characters into sequences of dots (.) and dashes
(-)
⩥ Playfair Cipher 4. Answer: 5 × 5 matrix containing the alphabet less
the letter J. Cipher/decipher process consists of a set of rules outlining
use of column and row combinations.
⩥ BIFID Cipher 3. Answer: Makes use of a grid and which maps the
letters into numeric values.
⩥ Rail Code Cipher 2. Answer: Employs a method to scramble text by
writing it in a sequence across a number of rails.
