“BFV is based on the ring learning with errors (RLWE) hardness problem, which is quantum resistant.”
Live Caller ID Lookup in iOS 18 asks a server about the number calling you without telling the server the number. The server computes on the encrypted query and never holds the key. Apple uses parameters with 128-bit post-quantum security and published the code as an open-source Swift package. Every spam-blocking app that uploads your call log just lost its excuse.