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Assume that your processor can operate at 100 Million Instructions per second. Assuming that you can test each key with [6 steps X 16 cycles =] 96 instructions, estimate the amount to time necessary to crack a DES encryption by testing all possible keys.

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Since a single key requires 96 instructions to be executed in order to be verified, it means that each second the processor tries 100*1000000/96 keys....
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