Replying to Avatar Vitor Pamplona

Can we create a Nostr filter where the client sends a bloomfilter instead of a massive list of pubkeys of the 1000 people an account is following?

At .01% error rate, the filter size drops from ~67kb to 2.3Kb. It looks like a good data-saving feature.

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Five 1y ago 💬 1

Data saving in filters for extra computation and logic in relays if I understand correctly.

Could this also provide some privacy benefits? The relay is not sure about the exact pubkeys the client is interested in.

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Vitor Pamplona 1y ago

There is not a lot of privacy gains. The relay does know which keys are in the set, with a small error rate (0.01%). So, it doesn't really create a big enough annonimity set.