When the Quantum Computers Attack

A full-fledged quantum computer is still years, if not decades, away. But developers have long thought that its killer app will be decoding encrypted messages on the internet and elsewhere, be they state secrets or personal information. That prospect has galvanized cryptographers. At a meeting this week in Santa Barbara, California, they will discuss nearly two dozen schemes for encrypting messages in ways that even quantum computers cannot crack. (H/T Steve Crandall)

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