Apple Upgrades iMessage Encryption to Match Signal, Adds Quantum Computing Resistance
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iMessage is getting upgraded encryption (PQ3) to make it quantum computing resistant, putting it on par with Signal.
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Both iMessage and Signal now use a combination of old and new encryption algorithms (Kyber + X3DH) for more security.
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End-to-end encryption prevents anyone but sender/receiver from accessing messages. Both iMessage and Signal provide this.
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Quantum computing threatens current encryption by allowing difficult math problems to be solved much faster.
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Apple and Signal are adding new "post-quantum cryptography" to defend against decrypted messages in a future with quantum computers.