Flashcards
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Cards in this deck (3)
- 1Cryptology - science of encryption. The need for encryption in information technology is greatly needed.All popular web browsers use built-in encryption features for secure e-commerce applications.
- 2Cipher methods - Plaintext can be encrypted through bit stream or block cipher method.Bit stream - each plaintext bit is transformed into cipher bit one at a time.
Block cipher - message divided into blocks (eg. sets of 8-16bit blocks) and each is transformed into encrypted block of cipher bits using algorithm and key. - 3Substitution cipher - to subtitute one value with another value.Monoalphabetic substitution - using only one alphabet.
Polyalphabetic substitution - more advanced, uses more than one alphabet.
Vigenerie cipher - advanced cipher, uses simple polyalphabetic code made up of 26 distinct cipher alphabets
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- Flashcards on Untitled, created by Thembisa Rweqana on 28/05/2015.
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- Thembisa Rweqana
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