Princeton University's Safe Internet Programming team has discovered a "major security flaw" in the World Wide Web which it claims could put users' personal information at risk.
Edward Felten, who heads the team, was quoted in an interview with the Boston Globe as saying that "Web spoofing" allows any Internet server to place itself between a user and the rest of the Web.
He explained that in this "middle position", the server can intercept information from the user before it reaches its destination on the Web.
It can then "observe, steal or alter any information" passing between the user and the Web, he claimed.
However, Larry Bloch, managing director of Net-Benefit, a UK ISP, claimed that information on the Internet could be spoofed by any service provider.
He said: "Every time you log onto the Internet, your information goes via your ISP's servers. It would be very easy to access that information if the ISP wanted to."
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