Unit 3-Symmetric Key Crypto_Part24

# Unit 3-Symmetric - P = plaintext block C = ciphertext block Encrypt P with key K to get ciphertext C C = E P K Decrypt C with key K to get

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Unit 3 - 47 Deep Crack The machine, shown here running, tests over 90 billion keys per second, taking an average of less than 5 days to discover a DES key Pictures from http://www.cryptography.com/resources/whitepapers/DES-photos.html

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Unit 3 - 48 Block Cipher Notation
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Unformatted text preview: P = plaintext block C = ciphertext block Encrypt P with key K to get ciphertext C C = E ( P , K ) Decrypt C with key K to get plaintext P P = D ( C , K ) Note that P = D ( E ( P , K ), K ) and C = E ( D ( C , K ), K )...
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## This note was uploaded on 03/17/2011 for the course ECE 4472 taught by Professor Ouda during the Fall '10 term at UWO.

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Unit 3-Symmetric - P = plaintext block C = ciphertext block Encrypt P with key K to get ciphertext C C = E P K Decrypt C with key K to get

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