Geo-Encryption

Working with a Hollywood movie executive and an Internet entrepreneur, Denning has invented a way to keep information scrambled until it reaches a precise location, as determined by GPS satellites. Armed with Dennings geo-encryption system, which she co-patented in 1998, only people in specified locations, such as movie theaters, living rooms or corporate conference rooms, would be able to unscramble the data. But the idea also has drawn interest from the Pentagon. Coded messages that the Defense Department sends its commanders in the field, for example, could be deciphered only in a certain room of a certain building in, say, Kandahar?greatly reducing the risk of malicious interception. Business intelligence, such as a private meeting among corporate directors, could be scrambled and uploaded to a satellite from a conference room, and downloaded and decoded in a conference room 1,000 miles away. Medical records could be sent from a doctor in Peoria for a second opinion to a doctor in Manhattan?and all without the usual worries over privacy leaks to insurers or investigators along the way. In addition, she says, "If someone hacked into your system, youd know exactly where he came from."
http://www.cioinsight.com/article/0,3658,s=303&a=24831,00.asp