Who's paranoid? Personal security tech goes mainstream in surveillance era

Gadget-makers in biometrics and tracking say they used to deal with the tinfoil hat brigade, but now everyone wants to know 'how to stay secure'

The man selling biometric equipment at the Consumer Electronic Show in Las Vegas this week had never seen so much interest in his booth in nearly 30 years.

And he's horrified. He always thought widespread acceptance of their fingerprint scanners would be for convenience, not surveillance, but he's not so sure any more.