The playfair cipher - Study guides, Class notes & Summaries

Electronic Code Book (ECB) - Answer Block 1 encrypted = Cipher 1, Block 2 encrypted = Cipher 2 Cipher Block Chaining (CBC) - Answer IV XOR Block 1 = Cipher text 1, Cipher Text 1 XOR Block 2 = Cipher text 2. Cipher Feedback (CFB) - Answer IV encrypted XOR Block 1 = Cipher 1, Cipher 1 XOR Block 2 = Cipher 2 Output Feedback (OFB) - Answer IV encrypted XOR Block 1 = Cipher 1, Cipher 1 encrypted XOR Block 2 = Cipher 2 Counter Mode (CTR) - Answer Nonce encrypted XOR Block 1 ...

ECES Practice Quiz (2022/2023) Rated A+ a data concealment method for covert communications that makes use of LSB replacement Steganography 12 % 5 Modulus Math 2 Symmetrical encryption is expressed mathematically as C = E(k,p) Tiger Hash Value 192-bit SHA256 Hash Value 128-bit FORK256 Hash Value 256-bit SHA1 Hash Value 160-bit GOST Hash Value 256-bit MD5 Hash Value 128-bit RIPEMD-160 Hash Value 160-bit AES Symmetric Block Cipher key and block size 128-bit blocks: 128, 192 or 256 bit k...

Introduction to Cryptography - C839. Exam Questions and answers, rated A+ Cipher Disk - -A physical device used to encrypt Polyalphabetic; each time you turn the disk, you use a new cipher Vinere Cipher - -Invented by Giovan Battista Bellaso in 1553 Encrypts text by using a series of different Caeser Ciphers based on a keyword Playfair Cipher - -Invented by Charles Wheatstone in 1854 Encrypts two letters instead of one Frequency Analysis - -Examining ciphertext looking for...

CrypTool CORRECT ANSWERS: Software which allows encryption of text using historic algorithms The Enigma Machine CORRECT ANSWERS: In World War II the Germans made use of an electro-mechanical rotor based cipher Known as The Enigma Machine. Allied cipher machines used in WWII included the British TypeX and the American SIGABA. The ADFGVX Cipher CORRECT ANSWERS: 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-le...

Cryptography CORRECT ANSWERS: The science of altering communication so that it cannot be understood without having the key. cipher CORRECT ANSWERS: The algorithm(s) needed to encrypt and decrypt a message. Mono-alphabet substitution CORRECT ANSWERS: Substitute one character of cipher text for each character of plain text. Caesar cipher CORRECT ANSWERS: Every letter is shifted a fixed number of spaces to the left or the right in the alphabet. Ciphertext CORRECT ANSWERS: The resul...

Cryptography CORRECT ANSWERS: science of altering communication so that it cannot be understood without having the key Mono-Alphabet Substitution CORRECT ANSWERS: algorithms simply substitute one character of cipher text for each character of plain text. Caesar Cipher CORRECT ANSWERS: choose a number by which to shift each letter of a text. ATBASH Cipher CORRECT ANSWERS: Hebrew code substitutes first letter of alphabet for last, second letter for the second-to-the-last ROT13 Ciph...

Cryptography (or cryptology); CORRECT ANSWERS: derived from word kryptós which means "hidden," and the verb gráfo, which means "write." It is the study of message secrecy. The process or skill of communicating in or deciphering secret writings or ciphers Cesar Cipher CORRECT ANSWERS: (mono-Alphabet Substitution) You can choose to shift any number of letters, either left or right. If you choose to shift two to of a single alphabet substitution since all letters are shifted the same a...

Summary WGU C839 Introduction to Cryptography - (EC-Council CES) CrypTool - (Correct Answer) Software which allows encryption of text using historic algorithms The Enigma Machine - (Correct Answer) In World War II the Germans made use of an electro-mechanical rotor based cipher Known as The Enigma Machine. Allied cipher machines used in WWII included the British TypeX and the American SIGABA. The ADFGVX Cipher - (Correct Answer) invented by Colonel Fritz Nebel in 1918. The key for thi...

Introduction to Cryptography Questions and Answers 100% Pass A business wants to use keys issued by a trusted third party to demonstrate to potential customers that it is a legitimate organization. Which key is used to sign the certificate issued to the business? Private key of the root CA A business wants to use keys issued by a trusted third party to demonstrate it is a legitimate organization to potential customers. Which key should the business send to potential customers to prove its iden...

WGU Introduction to Cryptography C839 (EC-Council CES) CrypTool Software which allows encryption of text using historic algorithms The Enigma Machine In World War II the Germans made use of an electro-mechanical rotor based cipher Known as The Enigma Machine. Allied cipher machines used in WWII included the British TypeX and the American SIGABA. 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 al...