Oke bear with me for a minute.
Once upon a time someone mentioned a hypothetical way where you would send an encrypted question to Google and Google would return an answer without decrypting it. As of lately i'v been searching for this hypothesis thinking there would be something about it on the internet, the problem is i can't find it.
So my question, is this theoretically possible, sending something encrypted and without the receiver knowing what it is return the correct information. Of course i get that when you encrypt every possible question and compare the 2 you could figure out the question and return the answer but i believe this was not how it was hypothetically done.
Has anyone of you ever heard of this? where does it come from?
I'm very sorry I could not provide a link to a paper or anything, I just cannot find anything about it.