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Project update: PIR-based messaging (lemmygrad.ml)

submitted 3 weeks ago by pancake@lemmygrad.ml to c/privacy@lemmy.ml

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After some investigation and benchmarking, it looks like the best PIR protocol for this use case is YPIR+SP (from February). On a single compute- and network-constrained server, with users on constrained (and possibly metered) networks, this would amount to providing service to up to 1000 users while keeping latencies reasonable; by (quadratically) scaling the server(s) enough, that could become up to 100,000. That means this method of message routing could definitely work, although I look every day in case new protocols are published.

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[–] pancake@lemmygrad.ml 1 points 3 weeks ago (1 children)

There's this post of mine, also this article gives some background on the application of PIR to anonymous messaging. Basically, I'm trying to do a basic version of that, but using a state-of-the-art PIR protocol introduced in this article. It's still not great performance-wise, but it's enough to be practical (as stated, many thousands of users given enough resources).

[–] solrize@lemmy.ml 1 points 3 weeks ago

Thanks, it's late here now but I'll try to look soon. I didn't realize significant improvements over Goldberg etc al were really possible. I'll try to understand that too.