--- title: Enhancing iMessage's Security with PQ3: Protection... description: Apple has announced a major security upgrade for iMessage with the introduction of the PQ3 protocol, providing Level 3 security. PQ3 combines Elliptic-Curve... canonical: https://daily.dev/posts/enhancing-imessage-s-security-with-pq3-protection-against-quantum-computer-attacks-c058s1tam twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Enhancing iMessage's Security with PQ3: Protection Against Quantum Computer Attacks | daily.dev og:description: Apple has announced a major security upgrade for iMessage with the introduction of the PQ3 protocol, providing Level 3 security. PQ3 combines Elliptic-Curve... og:url: https://daily.dev/posts/enhancing-imessage-s-security-with-pq3-protection-against-quantum-computer-attacks-c058s1tam og:image: https://api.daily.dev/og/posts/C058s1TaM.png og:image:alt: Enhancing iMessage's Security with PQ3: Protection Against Quantum Computer Attacks og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Enhancing iMessage's Security with PQ3: Protection Against Quantum Computer Attacks **[Collections](https://daily.dev/sources/collections)** · 1 min read · 1 upvotes · 0 comments ## Summary Apple has announced a major security upgrade for iMessage with the introduction of the PQ3 protocol, providing Level 3 security. PQ3 combines Elliptic-Curve cryptography and post-quantum cryptography to protect against quantum computer attacks and ensure message protection. ## Content Apple has announced a major security upgrade for its iMessage service to protect against future quantum computer attacks. The new protocol, PQ3, combines Elliptic-Curve cryptography and post-quantum cryptography, providing Level 3 security. PQ3 ensures the protection of messages against *Harvest Now, Decrypt Later* attacks and advanced quantum computing threats. By introducing PQ3, iMessage now offers the strongest security properties of any at-scale messaging protocol. It combines post-quantum initial key establishment with ongoing ratchets for self-healing against key compromise. This security enhancement puts iMessage on equal standing with Signal, another secure messaging app. PQ3 will be rolled out with the next software updates, following Apple's decision to bring RCS to the Messages app. ## Similar posts on daily.dev - [Don’t just attend KubeCon \+ CloudNativeCon, Merge Forward your experience\!](https://daily.dev/posts/don-t-just-attend-kubecon-cloudnativecon-merge-forward-your-experience--l0rpp73x8) · CNCF · 1 upvotes · 0 comments - [Announcing H2 2026 KCDs](https://daily.dev/posts/announcing-h2-2026-kcds-m96goajm1) · CNCF · 1 upvotes · 0 comments - [Two months of Open Community Groups](https://daily.dev/posts/two-months-of-open-community-groups-asf52zhbs) · CNCF · 0 upvotes · 0 comments - [CNCF Unveils Schedule for KubeCon \+ CloudNativeCon Europe 2026](https://daily.dev/posts/cncf-unveils-schedule-for-kubecon-cloudnativecon-europe-2026-ikhcoa5cb) · CNCF · 2 upvotes · 0 comments - [CNCF Debuts KubeCon \+ CloudNativeCon Japan 2026 Schedule](https://daily.dev/posts/cncf-debuts-kubecon-cloudnativecon-japan-2026-schedule-xp5pyudub) · CNCF · 1 upvotes · 0 comments --- Tags: [#quantum-computing](https://daily.dev/tags/quantum-computing), [#security](https://daily.dev/tags/security) [View this post on daily.dev](https://daily.dev/posts/enhancing-imessage-s-security-with-pq3-protection-against-quantum-computer-attacks-c058s1tam) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Enhancing iMessage's Security with PQ3: Protection Against Quantum Computer Attacks","url":"https://daily.dev/posts/enhancing-imessage-s-security-with-pq3-protection-against-quantum-computer-attacks-c058s1tam","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/enhancing-imessage-s-security-with-pq3-protection-against-quantum-computer-attacks-c058s1tam"},"datePublished":"2024-02-21T15:12:09.593Z","dateModified":"2026-03-15T06:40:14.766Z","description":"Apple has announced a major security upgrade for iMessage with the introduction of the PQ3 protocol, providing Level 3 security. 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