Zlatin Balevsky:
> is it mathematically possible to have a function that given two or more keys
> returns a key that is equally far from them?
Yes, but two hashes won't have a meaningful midpoint.
> if such function existed and I fed it the hashed "aaa" and "ccc" and then
> unhashed the output, would it be "bbb" ?
You can only precisely calculate "bbb" if you have "aaa" and "ccc".
"Unhashing" a secure hash is infeasible.
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