Thieves are using Wi-Fi detectors to sniff out notebook computers hidden in office drawers and car trunks, even when those computers have been shut down. How are they achieving this impossible task? As far as we can tell, it’s magic. The claim comes from Credant, a UK-based data encryption company that sells “solutions” to big business, and clearly has an interest in scary stories about data and laptop theft. The story goes like this: people close their notebooks and stow them in a filing cabinet drawer or in the trunk of their car. The notebooks go to sleep. Or do they? Credant’s *marketing*, Sean Glynn:

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