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Apple iOS 17.4: iMessage Gets Post-Quantum Encryption in New Update

ID: 74f8fc7f-b6bc-5f4d-9f2e-a9ff059714bb

STIX ID: report--74f8fc7f-b6bc-5f4d-9f2e-a9ff059714bb

Feed Name: WIRED Security

Date Published: 2024-02-21

Date Updated: 2026-04-26

Author: Matt Burgess

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Apple announced PQ3, a post-quantum cryptographic protocol for iMessage, rolling out in iOS/iPadOS 17.4 and macOS 14.4 after beta testing; billed as the most significant cryptographic upgrade in iMessage history, PQ3 rebuilds the protocol from the ground up and will replace existing encryption by year’s end, automatically protecting users upon OS update.

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