I saw this: news.ycombinator.com/item?id=31668814

Would it be possible to use this type of technology for light wallets?

"This demo allows private access to 6 GB (~30%) of English Wikipedia. In theory, even if the server is malicious, it will be unable to learn which articles you request."

"When making your first query, this demo will upload 18 MB of data; each later query requires only 28 KB of upload. The server response to each query is 250 KB."

Might be a bit demanding on nodes, though.

yanmaani: what information would you try to hide with that?

I imagine the idea would be for someone to hide which account they're requesting information for in an http request to say MyMonero's api.

hide which blocks or txos they're asking about

The thing is, a client doesn't know which ones they're interested in in the first place.

Might be useful for mapping from output index to output contents, when you selected ring members but need to obtain full copies