Use of mobile ‘supercookies’ is seen as a threat to privacy

For the last several months, cybersecurity experts have been warning Verizon Wireless that it was putting the privacy of its customers at risk. The computer codes the company uses to tag and follow its mobile subscribers around the Web, they said, could make those consumers vulnerable to covert tracking and profiling. It looks as if there was reason to worry. This month Jonathan Mayer, a lawyer and computer science graduate student at Stanford University, reported on his
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