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Is it feasible to build a cipher (or hash) out of GPU or DSP primitives (e.g. big matrix multiplication, Fast Fourier Transform, big block SIMD, or hardware H.264/AVC codec)? Preferably those are slow to run on conventional CPU but a lot faster on GPUs and DSPs.

So if such a GPU or DSP-based cipher or hash is feasible, is there any examples or learning resources for a beginner?

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closed as unclear what you're asking by e-sushi, otus, Seth, DrLecter, poncho Sep 30 '14 at 5:11

Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

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    $\begingroup$ Yes. Makes me think: what exactly are you asking? Currently, your question is answerable with a simple Yes or No and I’m not sure what other information to add to it since you don’t provide anything else to answer. Maybe you could edit your question to enhance it? In case of doubt, read How do I ask a good question?. $\endgroup$ – e-sushi Sep 28 '14 at 1:30
  • $\begingroup$ I agree with the above comment. Perhaps you would like to ask whether such ciphers or hashes already exist? $\endgroup$ – otus Sep 28 '14 at 7:56
  • $\begingroup$ Or alternatively, what GPU primitives are currently used in these hashes and why? $\endgroup$ – Stephen Touset Sep 29 '14 at 1:57

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