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Restaurant Stumps Wi-Fi Seekers with Calculus Password

The first thing many smartphone users do when they sit down at a restaurant is connect to the local Wi-Fi network. Ordinarily free, establishments often have a simple password for the network posted on the wall to prevent non-customers from logging in. One Thai restaurant, however, decided to break the norm and give its customers a not-so-simple password to access the internet. The sign on ...

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