Codemakers race to secure the internet as quantum threat looms

How do you outsmart a computer that could soon eclipse anything we have ever built? That is the challenge facing researchers who are working to build up our defenses against the coming age of quantum computing. 

Quantum computers promise a giant leap in computational power, but they will also bring risks. Their code-breaking capabilities could enable governments or criminals to intercept online communications and steal sensitive data. The threat is not a distant one.