I wonder if you could take this one step further and have opaque queries using homomorphic encryption on the index and then somehow extracting ranges around the

I wonder if you could take this one step further and have opaque queries using homomorphic encryption on the index and then somehow extracting ranges around the document(s) you're interested in Inspired by: "Show HN: Read Wikipedia privately using homomorphic encryption" https://news.ycombinator.com/item?id=31668814 https://news.ycombinator.com/item?id=31668814