Forget Trojan horses -- it's the cats you have to worry about. Security engineer Gene Bransfield has developed WarKitteh, a tech-laden collar that turns feline companions into scouts for WiFi hackers. The innocuous-looking accessory hides a Spark Core board that maps wireless networks and their vulnerabilities wherever the pet wanders. If used in the field, the technology would be pretty sneaky; the cat stalking mice in your backyard could represent the prelude to an attack on your wireless router...

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