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Like many existing security schemes today, though, FIDO faces an ominous if distant threat from quantum computing, which one day will cause the currently rock-solid cryptography the standard uses to completely crumble.

Over the past decade, mathematicians and engineers have scrambled to head off this cryptopocalypse with the advent of PQC—short for post-quantum cryptography—a class of encryption that uses algorithms resistant to quantum-computing attacks.

This week, researchers from Google announced the release of the first implementation of quantum-resistant encryption for use in the type of security keys that are the basic building blocks of FIDO2.

“While quantum attacks are still in the distant future, deploying cryptography at Internet scale is a massive undertaking which is why doing it as early as possible is vital,” Elie Bursztein and Fabian Kaczmarczyck, cybersecurity and AI research director, and software engineer, respectively, at Google wrote.

Moving forward, we are hoping  to see this implementation (or a variant of it), being standardized as part of the FIDO2 key specification and supported by major web browsers so that users' credentials can be protected against quantum attacks.

The security of RSA and other traditional forms of asymmetric encryption is based on mathematical problems that are easy to verify the answer to but hard to calculate.

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