Comment by pdpi

One specific use Apple is making of homomorphic encryption as of iOS 18 (I think) is for spam callers. You get a phone call, your phone sends Apple the encrypted phone number, they run it against their spam caller database, and you get the encrypted spam/not spam response back. They published a bunch of open source code around this functionality a while back.

https://www.swift.org/blog/announcing-swift-homomorphic-encr...