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Cellphone tracking services: Friend finder or Big Brother?

Mobile location tracking lets you see where your friends are. But what about privacy?

As GPS merges with cell phones, the ability to meet up with new “friends” online becomes much easier. But it is fraught with security concerns.


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Where r u? That text message, says Sam Altman, was so common that he wanted to find a way to answer it – for everyone.

As a sophomore in computer science at Stanford University, Mr. Altman imagined a way that mobile phone users could seamlessly check their friends’ whereabouts with location-tracking technology. But back in 2005, global positioning system (GPS) hadn’t arrived in smart phones.

Technology soon caught up with the idea. Today his company, Loopt, has more than 1 million users and is one of the most popular services to allow people to track their friends via their smart phones. And with more cellphones now equipped with GPS, other services such as Google Latitude are collecting location data from scores of users and broadcasting that information through phone networks or the Internet.

Such tracking services offer a great way for people stay connected – and can be a boon for parents – but their proliferation also has privacy advocates biting their nails. As companies forge into largely uncharted areas of tracking and recording customer locations, many worry that consumers won’t be able to ensure that their private information – such as their whereabouts on a given day – is being safeguarded, especially from advertisers.


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