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The Data Encryption Standard algorithm has features which may be used to advantage in parallelizing an implementation. The kernel of the algorithm, a single round, may be decomposed into several parallel computations resulting in a structure with minimal delay. These rounds may also be computed in a pipelined parallel structure for operations modes which do not require cryptext feedback. Finally, system I/O may be performed in parallel with the encryption computation for further gain. Although several of these ideas have been discussed before separately, the composite presentation is novel.
Albert G. Broscious and Jonathan M. Smith, "Exploiting Parallelism in Hardware Implementation of the DES", . February 1993.
Date Posted: 15 August 2007