Exclusive: OpenSSL tells us how to prepare for a post-quantum internet

Knowing what ‘quantum’ is and why it affects the internet may not be something most people understand. How a physics concept changes the security of the internet isn’t really at the forefront of most people’s worries.

But the change is already happening. The internet is preparing for a post-quantum world that renders much of the encryption the world has relied on obsolete. To understand just how powerful post-quantum decryption is, think of enigma: an encryption machine that took the entire secret operation of Bletchley park over a year to crack would be solved almost instantly. For today’s standard public-key encryption algorithms, it's a matter of days or hours.

By some estimates, the viability of quantum computers capable of this level of decryption are still several years away. But preparations are already happening - and not just by the good guys.

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