April 9th Notes - Encryption.docx

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Media, Information and Technoculture
Media, Information and Technoculture 2200F/G
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thMIT 1700April 9 2012 Encryption Secret Writing Stegnagraphy Cyprography SubsitutionTranspositionk CipherCode Cyber warfare weapon of the future Information must be sent to troopsallies without being intercepted Many worked as code makersbreakers Tried to crack enemy codes NazisEncryption is essential in information transfer control Ex Web banking you dont want strangers to be able to see your banking details Encryption maintains privacy within the informationCipher replaces an entire word with a symbol or other letters so that only the recipient can decipherThe message known as cipher text is lockedThe cipher maker has to provide recipient with something called the key metaphoricalDuring war between Greeks and the Persians Exiles in the Persian lands needed to communicate vital information to the Greeks Carved message in wood and covered it in plasticmessage was conveyed without having been intercepted SteganographyThis was an acceptable way of delivering messages secretly Steganography
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