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2024 Newest|WGU C839 - Introduction to Cryptography | UPDATE| COMPLETE FREQUENTLY TESTED QUESTIONS WITH VERIFIED ANSWERS|GET IT 100% ACCURATE!! $12.99   Add to cart

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2024 Newest|WGU C839 - Introduction to Cryptography | UPDATE| COMPLETE FREQUENTLY TESTED QUESTIONS WITH VERIFIED ANSWERS|GET IT 100% ACCURATE!!

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2024 Newest|WGU C839 - Introduction to Cryptography | UPDATE| COMPLETE FREQUENTLY TESTED QUESTIONS WITH VERIFIED ANSWERS|GET IT 100% ACCURATE!!

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  • October 29, 2024
  • 8
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • 2024 Newest|WGU C839 - Introduction
  • 2024 Newest|WGU C839 - Introduction
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10/29/24, 6:57 AM 2024 Newest|WGU C839 - Introduction to Cryptography |2024-2025 UPDATE| COMPLETE FREQUENTLY TESTED QUESTI…




2024 Newest|WGU C839 - Introduction to
Cryptography |2024-2025 UPDATE| COMPLETE
FREQUENTLY TESTED QUESTIONS WITH
VERIFIED ANSWERS|GET IT 100% ACCURATE!!


Terms in this set (191)


science of altering communication so that it cannot
Cryptography
be understood without having the key

Mono-Alphabet algorithms simply substitute one character of cipher
Substitution text for each character of plain text.

choose a number by which to shift each letter of a
Caesar Cipher
text.

Hebrew code substitutes first letter of alphabet for
ATBASH Cipher
last, second letter for the second-to-the-last

ROT13 Cipher characters rotated 13 characters

Greek, written across leather, and wrapped around
Scytale
physical cylinder

easy to break, preserve underlying letter and word
Substitution Weaknesses
frequency

Multi-Alphabet use multiple alphabets,
Substitution

Cipher Disk Leon Alberti in 1466, polyalphabetic;

1553 by Giovan Battista; until early 1900s, multi-
Vigenère Cipher
alphabet, 26X26

uses a 5 by 5 table containing a keyword or phrase
Playfair Cipher
encrypts two letters rather than one.

ADFGVX 36-letter alphabet; six-by-six square of letters,


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, 10/29/24, 6:57 AM 2024 Newest|WGU C839 - Introduction to Cryptography |2024-2025 UPDATE| COMPLETE FREQUENTLY TESTED QUESTI…

Used In World War II the Germans;
Enigma Machine
electromechanical rotor-based cipher system;

WWII American similar to the Enigma machine, but
SIGABA
with improvements and more security.

WWII British similar to the Enigma machine, but with
TypeX
improvements and more security.

same key used to decrypt and to encrypt; faster
Symmetric Cryptography
then asymmetric

changes to one character in the plaintext affect
Diffusion
multiple characters in the ciphertext

attempts to make the relationship between the
Confusion statistical frequencies of the cipher text and the
actual key as complex as possible

Avalanche small change yields large effects in the output

algorithm is publically known, only the key or keys
Kerckhoffs's Principle
are kept secret

Symmetric algorithm C = E[k,p]
encryption

Symmetric algorithm P = D[k,c]
decryption

changing some part of the plaintext for some
Substitution
matching part of ciphertext.

Transposition swapping of blocks of ciphertext

take two binary numbers and compare them; both
numbers have a one in both places, then the result
in one. If not, result zero

Binary AND
1101
1001
-----
1001




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