GEMATMW - Cryptography Exam Questions with Answers.

GEMATMW - Cryptography Exam Questions with Answers Cryptology - Correct Answers: the mathematics that underpin cryptography and cryptanalysis Cryptography - Correct Answers: involves inventing cipher systems Cryptanalysis - Correct Answers: involves breaking cipher systems Encryption - Correct Answers: process which transforms the plain text to the cipher text Decryption - Correct Answers: process which converts the cipher text to the plain text Confidentiality - Correct Answers: no third party can read the message Integrity - Correct Answers: no third party can change the message Authenticity - Correct Answers: the receiver is assured that the sender sent the message Non-repudiation - Correct Answers: the sender cannot deny sending the message Pigpen Cipher - Correct Answers: substitution is fixed for each letter of the alphabet Shift Cipher - Correct Answers: a simple substitution cipher where the letters are coded by moving a certain amount forwards or backwards in the alphabet. Substitution Cipher - Correct Answers: replace each letter with a different letter to produce the cipher text Transposition Cipher - Correct Answers: the letters are just moved around Affine Cipher - Correct Answers: a special type of substitution cipher Polyalphabetic Cipher - Correct Answers: remedies the situation by using a keystream which is just a keyword repeated several times