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Is it possible to build a simple SHA-256 circuit using only basic logic gates (no ICs)? I want to do this as a challenge (and maybe find some bitcoins...joke). How may logic gates do you estimate would be required? Are there any diagrams you could point me to?

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The question a worded is about technology, not cryptography. The idea of logic gates without ICs is either extremely retro (ever since the early 1960's, logic gates are ICs), or unconventional technology. It seems the real question is "how many logic gates are needed for SHA-256?" and even that is ill-posed, for the answer depends enormously on if the implementation is fully parallel, or sequential. – fgrieu Nov 14 '12 at 15:32
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Did you try to google SHA2 and hardware and maybe gates? With gates the top link could help you to get an idea. – jug Nov 14 '12 at 15:33

closed as off topic by fgrieu, Thomas, mikeazo♦ Nov 14 '12 at 17:09

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