Comment by aeontech

4 days ago

According to this post on Apple's Machine Learning blog, yes, Wally is the method used for this feature.

https://machinelearning.apple.com/research/homomorphic-encry...

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aeontech

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vrtx0  4 days ago

Thank you! This is exactly the information the OP seems to have missed. It seems to confirm my suspicion that the author’s concerns about server-side privacy are unfounded — I think:

> The client decrypts the reply to its PNNS query, which may contain multiple candidate landmarks. A specialized, lightweight on-device reranking model then predicts the best candidate…

[please correct me if I missed anything — this used to be my field, but I’ve been disabled for 10 years now, so grain of salt]