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Twitter admits taking data from smartphones

Updated Thursday, February 16th 2012 at 00:00 GMT +3

Twitter has admitted copying entire address books from smartphones and storing the data on its servers, often without customers' knowledge.

Access to the address book is enabled when users click on the "Find Friends" feature on smartphone apps.

Two US congressmen have written to Apple asking why the firm allows the practice on its iPhone, as it contravenes app developer guidelines

Twitter has said it will update its privacy policy to be more explicit.

The practice came to light when an app developer in Singapore, Arun Thampi, noticed that his contacts had been copied from his iPhone address book without his consent by a social network called Path.

Dave Morin, CEO of Path, apologised and said Path would ask users to opt in to share their contact information.

However, he noted separately that it was an "industry best practice" to upload or import address book information.

iPhone apps by social sites including Facebook, FourSquare, Instagram, Foodspotting and Yelp are also reported to access the address book.

Permission not granted

Critics have noted that these apps are all available for download from Apple's iTunes store, even though the practice of copying address book contacts without prior consent appears to violate its user guidelines.

The Apple guidelines say: "Apps that read or write data outside its designated container area will be rejected."

They add: "Apps cannot transmit data about a user without obtaining the user's prior permission."

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