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Unformatted text preview: not the same and it is infeasible to compute it From the the decryption key . . . NO . . . . 3. DES is an iterated cipher with • block length = 64 bits • key length = 56 bits 4. Triple DES is • as secure as single DES: . . . NO . . . . • more secure than DES: . . . YES . . . . 5. There are several major attacks on DES: • these are not a dramatic improvement on brute Force attacks: . . . YES . . . . • these are a dramatic improvement on brute Force attacks: . . . NO . . . . Mike Burmester...
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This document was uploaded on 12/04/2011.
- Fall '09
- Computer Security