Apple rolls out quantum-resistant cryptography for iMessage

Apple is deploying post-quantum cryptography to iMessage—now in beta and expected in iOS 17.4—using Kyber for key exchange alongside classical ECC and frequent key rotation (every ≤50 messages or ≤7 days), with protection dependent on both parties updating. This move aligns with NIST’s PQC standardization and U.S. government roadmaps, mirrors similar adoptions by Signal and Cloudflare, and targets the 'harvest now, decrypt later' threat while signaling growing competition on security and privacy features.