| Robert W. Baldwin. MIT fdes 5 (crypt) source code. |
....are needed. The E expansion technique used for speed crypt has little advantage over e[ combined SPE table for machines that are 64 bits wide or wider. For machines with smaller bus widths, the speed crypt implementation should run about twice as fast. Bob Baldwin wrote the fdes code at MIT[1]. The subkeys are computed in the standard way and he avoids the swap between DES rounds. His SPE lookups are done 6 bits at e[ time. Baldwin has other optimize[tions that are specific to his design and cannot be implemented in speed crypt. The fdes program is designed to run well on e[ VAX. It ....
Robert W. Baldwin. MIT fdes 5 (crypt) source code.
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Robert W. Baldwin. MIT fdes 5 (crypt) source code.
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