What is the computational burden of FHE over doing the same operation in plaintext? I realize that many cloud proponants think that FHE may allow them to work with data without security worries (if it is all encrypted, and we dont have the keys, it aint our problem) but if FHE requires a 100x or 1000x increase in processor capacity then i am not sure it will be practical at scale.

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layer8 8 hours ago | parent [-]

It’s at least a million times slower than non-encrypted computation. 1000x or 100x would be a huge progress.

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sandworm101 7 hours ago | parent [-]

Oh. It really is that bad still. So if the question is between wrapping the plaintext in layers of security, or building out a million new server instances to do it via FHE, i know which one everyone will choose.

	▲	bgnn 7 hours ago \| parent [-]
		It's so bad that the only way FHE can get more efficient is to use a non-conventional compute technology. Some want to do it in optical donain.