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iMessage gets a major makeover that puts it on equal footing with Signal

How Kybers and ratcheting are boosting the resiliency of Apple's messaging app.

PQ3 HAS ARRIVED — iMessage is getting a major makeover that makes it among the two messaging apps most prepared to withstand the coming advent of quantum computing, largely at parity with Signal or arguably incrementally more hardened. iMessage and Signal provide end-to-end encryption, a protection that makes it impossible for anyone other than the sender and recipient of a message to read it in decrypted form. One common estimate is that a quantum computer with 20 million qubits (a basic unit of measurement) will be able to crack a single 2,048-bit RSA key in about eight hours.

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