Apple has announced that from now on, messages sent through iMessage will be protected by two types of end-to-end encryption, instead of one, as before. The added encryption does not replace the old PQ3 algorithm, which is vulnerable to quantum computing, but complements it with a new one – Kyber. That is, in order to break the encryption, the attacker will have to deal with two algorithms at once. Experts say that thanks to the innovation, iMessage will be as reliable as Signal – and maybe even more reliable.

End-to-end encryption is security that makes it impossible for anyone other than the sender and receiver to read messages. That’s why – because of its reliability – Signal, for example, has as many as a billion users. And one of the biggest potential threats to privacy is quantum computing. Potential – because the day when a quantum computer will be able to break encryption algorithms has not yet come. But it’s definitely a matter of time, crypto engineers say. According to some estimates, a quantum computer with 20 million qubits would be able to crack a single 2048-bit RSA key in about eight hours. The largest quantum computer today has 433 qubits. Therefore, both Signal and iMessage do not wait for the weather from the sea and prefer to play ahead of the curve.

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