WGU D334 INTRO TO CRYPTOGRAPHY FULL
SOLUTION STUDY GUIDE
◉ Playfair.
Answer: A 5x5 grid created with a secret phrase (letters can not
repeat in grid)
◉ Homophonic Substitution Cipher.
Answer: A substitution cipher that replaces plaintext with multiple
possible cipher texts
◉ Caesar Coding.
Answer: Created by Julius Caesar (uses a 3 letter shift)
◉ Scrambled Alphabet.
Answer: Each letter in the alphabet is mapped to a random letter
-cracked with frequency analysis
-analyzes ciphertext to identify text variation from standard English
characters
◉ Vigenere Cipher.
,Answer: known as a polyalphabetic cipher and uses a number of
cipher alphabets. Popular
◉ Morse Code.
Answer: a system of dots and dashes that represent the alphabet
◉ Fractionated Morse Cipher.
Answer: Uses 26-character key mapping and converts plaintext
input into fixed-length chunks of morse code used to derive
ciphertext letters.
◉ Pig Pen.
Answer: uses a mono-alphabetic substitution method, four grid in a
square and a diagonal shape
◉ Rail Code.
Answer: scramble method known as Rail Fence Cipher. Message is
written in a sequence across a number of rails
◉ Combinations.
Answer: represents selections of items from a larger set without
regard to the order in which they are chosen ex: America, Iceland /
America, Germany / Germany, Iceland
, ◉ Permutations.
Answer: An arrangement of objects in a specific order
◉ Set Theory.
Answer: A set is a well-defined collection of distinct objects, called
elements or members, which can be anything: numbers, letters,
colors, or even other sets. Sets are typically denoted by curly braces
{}
◉ One-time Pad (OTP).
Answer: A cipher code that is only used once
-a near uncrackable cipher that uses a code book that both parties
know
◉ ASCII.
Answer: is a 8 bit values, and supports 256 different characters
(2^8)
◉ UTF-16.
Answer: Extends characters to 16 bit values giving 65,536 values
(2^16)
◉ Hexadecimal.
SOLUTION STUDY GUIDE
◉ Playfair.
Answer: A 5x5 grid created with a secret phrase (letters can not
repeat in grid)
◉ Homophonic Substitution Cipher.
Answer: A substitution cipher that replaces plaintext with multiple
possible cipher texts
◉ Caesar Coding.
Answer: Created by Julius Caesar (uses a 3 letter shift)
◉ Scrambled Alphabet.
Answer: Each letter in the alphabet is mapped to a random letter
-cracked with frequency analysis
-analyzes ciphertext to identify text variation from standard English
characters
◉ Vigenere Cipher.
,Answer: known as a polyalphabetic cipher and uses a number of
cipher alphabets. Popular
◉ Morse Code.
Answer: a system of dots and dashes that represent the alphabet
◉ Fractionated Morse Cipher.
Answer: Uses 26-character key mapping and converts plaintext
input into fixed-length chunks of morse code used to derive
ciphertext letters.
◉ Pig Pen.
Answer: uses a mono-alphabetic substitution method, four grid in a
square and a diagonal shape
◉ Rail Code.
Answer: scramble method known as Rail Fence Cipher. Message is
written in a sequence across a number of rails
◉ Combinations.
Answer: represents selections of items from a larger set without
regard to the order in which they are chosen ex: America, Iceland /
America, Germany / Germany, Iceland
, ◉ Permutations.
Answer: An arrangement of objects in a specific order
◉ Set Theory.
Answer: A set is a well-defined collection of distinct objects, called
elements or members, which can be anything: numbers, letters,
colors, or even other sets. Sets are typically denoted by curly braces
{}
◉ One-time Pad (OTP).
Answer: A cipher code that is only used once
-a near uncrackable cipher that uses a code book that both parties
know
◉ ASCII.
Answer: is a 8 bit values, and supports 256 different characters
(2^8)
◉ UTF-16.
Answer: Extends characters to 16 bit values giving 65,536 values
(2^16)
◉ Hexadecimal.
