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Apple's PQ3 Brings Post-Quantum Security to iMessage

The Apple security team has announced PQ3, a cryptographic security upgrade in iMessage.

According to the announcement [2], PQ3 is a

"ground-breaking post-quantum cryptographic protocol that advances the state of the art of end-to-end secure messaging."

Apple says PQ3 is the first messaging protocol to reach what they call Level 3 security, where

"post-quantum cryptography is used to secure both the initial key establishment and the ongoing message exchange, with the ability to rapidly and automatically restore the cryptographic security of a conversation, even if a given key becomes compromised."

The announcement continues:

"PQ3 provides the strongest security properties of any at-scale messaging protocol in the world."

See details at Apple.

=> HTTPS | Apple PQ3 Blog Post