Introduction to Cryptography - C839. Exam Questions and answers, rated A+

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 patterns that can be examined against the frequency rate of letter usage by language Kerckhoff's principle - -A cryptosystem should be secure even if all of the elements of the system, except the key, is public knowledge Symmetric cryptography equation - -C = E(k,p) Symmetric cryptography - -Private key is used to both encrypt and decrypt Avalanche - -A small change yields large effects in the output Substitution - -Changing some part of the plain text for some matching part of the cipher text GOST value - -256 bits Ripe MD-160 value - -160 bits Fork-256 value - -256 bits SHA-256 value - -256 bits Mono-Alphabetic substitution - -Algorithms that substitute one character of cipher text for each character of plain text