How High-tech Gadgets Leak our Identity Revealed:

gadgets It is an article of faith now that we should avoid giving out our personal data to complete strangers.Yet many of the high-tech items that we carry with us every day may be doing just that - broadcasting our nationality, location and identity, writes The Sunday Times.

"It's amazing how many people put their full or last name in their phone as a Bluetooth identity," says an anonymous author on a website where you can find live data on more than 100,000 people. You can even search for individual first names.

Even if a person doesn't use their own name, a determined tracker can find a person needed through the network of Bluetooth receivers.

Paying just 50 pounds can locate a person to within yards if they keep their Bluetooth function on their phones switched on.

Of course, all phones allow you to turn Bluetooth off. But there are plenty of other technologies which could also be leaking your personal data. It is possible to follow the location of individual mobile-phone handsets, and more importantly their owners, for as little as five pounds per month. Another option for trackers is to sign up to an application on the social networking site Facebook that can pinpoint your friends' phones on a digital map. All of these require the permission of the phone's owner, but a determined tracker can easily overcome this.

Another technology that allows identification is RFID. The short-range system is used in the UK to track goods in warehouses, to ‘chip’ pet dogs and to secure the kind of electronic passports that, for example, the UK has been issuing since 2006. However, German researchers have recently demonstrated that they could remotely scan the latest e-passports, for instance, through a coat or bag and determine at least the holder's nationality.

It seems that all hi-tech progress is, in a way, a double edged sword.

For all the advantages, you have to be careful of the drawbacks too.

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