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Unformatted text preview: round as well as shown in the book on page 108. 6) Consider a stream cipher that has encrypted a plaintext abcdef and created the ciphertext 101110 . Now, you have inserted the bit 1 into the plaintext so it now reads a1bcde . When this second plaintext gets encrypted, the corresponding ciphertext is 100101 . Determine the values of bits bcdef . 7) Let the input to Sboxes 1 through 4 in DES be 923fa0 . Determine the corresponding output from those sboxes in hex. (Note: Your answer should have 4 hex characters instead of 6.)...
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This note was uploaded on 07/13/2011 for the course CIS 3362 taught by Professor Staff during the Fall '08 term at University of Central Florida.
 Fall '08
 Staff
 Information Security

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