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The Guardian - UK
The Guardian - UK
Technology
Jack Schofield

How about a digital rights

How about a digital rights management system that would let you watch a movie on your PC in London but not if you were in Manchester or anywhere else? Or an e-mail that was readable in Manchester, UK, but not in Manchester, New Hampshire? Simple: just tie the encryption to the GPS global positioning satellite system. Dorothy Denning is pioneering this form of geo-encryption. There's a useful paper here.

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