An Evaluation Of CPU Vs. GPU Performance Of Some Com-binatorial Algorithms For Cryptoanalysis
Vadim Bulavintsev · Bulletin of the South Ural State University Series Computational Mathematics and Software Engineering · 2015
In this work we assess performance of CPU and GPU implementations of some widely-used cryptanalytic combinatorial algorithms. In particular, we analyze obstacles for effective GPU implementation of “smart” combinatorial algorithms. Next, to alleviate performance problems arising from inefficient processing of conditional expressions in SIMD-devices we devise some special control flow graph transformation techniques. Finally, we demonstrate that contemporary GPU’s memory access schemes are incompatible with typical memory access patterns of “smart” combinatorial algorithms studied. We use DES and A5/1 cryptographic functions as test cases.