Quantum computers pose an outsized threat to status quo cryptographic solutions.
Apple unveiled PQ3, “the most significant cryptographic security upgrade in iMessage history,” for iOS 17.4 on Feb. 21.
With the new protocol, Apple becomes one of only a handful of providers featuring post-quantum cryptography for messages. Signal launched a “quantum resistant” encryption upgrade back in Sep. 2023, but Apple says it's the first to reach “level 3” encryption.
According to the Cupertino company:
