1 \/ 20
WGU C839 Introduction to Cryptography – (EC-Council CES)
1.CrypTool: Software which allows encryption of text using historic
algorithms
2.The Enigma Machine: In World War II the Germans made use of an
electro-me- chanical rotor based cipher Known as The Enigma
Machine.
Allied cipher machines used in WWII included the British TypeX and the
American SIGABA.
3.The ADFGVX Cipher: invented by Colonel Fritz Nebel in 1918.
The key for this algorithm is a six-by-six square of letters, used to
encode a 36-letter alphabet.
4.The Playfair Cipher: invented in 1854 by Charles Wheatstone.
The Playfair cipher uses a five-by-five table containing a keyword or
key phrase.<\/p>\n\n\n\n
2 \/ 20
5.Breaking the Vigene re Ciph:eIrn 1863, Friedrich Kasiski was the first
person to publish a successful general attack on the Vigene re
Cipher
6.The Vigene re Ciph:eTr his is perhaps the most widely known multialphabet substitution cipher. invented in 1553 by Giovan Battista
Bellaso. Uses a series of different Caesar ciphers based on the letters
of a keyword.
7.The Cipher Disk: The cipher disk was invented by Leon Alberti in<\/p>\n\n\n\n
3 \/ 20
12.The Caesar Cipher: You can choose to shift any number of letters,
either left or right. If you choose to shift two to
the right, that would be a +2; if you choose to shift four to the left, thatwould be a
-4.
13.Mono-Alphabet Substitution: These algorithms
simply substitute one character of cipher text for each character of
plain text.<\/p>\n\n\n\n
4 \/ 20
Examples: Atbash Cipher, Caesar Cipher, Rot13
14.Symmetric Cryptography: It is simply any algorithm where the key
used to decrypt a message is the same key used to encrypt.
15.Diffusion: Changes to one character in the plain text affect multiple
characters in the cipher text.
16.Confusion: Confusion attempts to make the relationship between
the statisti- cal frequencies of the cipher text and the actual key as
complex as possible. This occurs by using a complex substitution
algorithm.
17.Avalanche: a small change yields large effects in the output, This is
Fiestel’s variation on Claude Shannon’s concept of diffusion.
18.Kerckhoffs’s Principle: This principle states that a cryptosystem
should be secure even if everything about the system, except the
key, is publicly known.
19.Substitution: Substitution is changing some part of the plaintext
for some matching part of the Cipher Text.
20.Transposition: Transposition is the swapping of blocks of ciphertext.
21.binary numbers: there are three operations not found in
normal math: AND, OR, and XOR operations.
22.Binary AND: If both numbers have a one in both places, then the
resultant number is a one.
<\/p>\n","protected":false},"excerpt":{"rendered":"
1 \/ 20WGU C839 Introduction to Cryptography – (EC-Council CES)1.CrypTool: Software which allows encryption of text using historicalgorithms2.The Enigma Machine: In World War II the Germans made use of anelectro-me- chanical rotor based cipher Known as The EnigmaMachine.Allied cipher machines used in WWII included the British TypeX and theAmerican SIGABA.3.The ADFGVX Cipher: invented by Colonel […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-114679","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/114679","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=114679"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/114679\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=114679"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=114679"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=114679"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}