Robert McMillan reports:
Despite concerns that federal authorities might fine or arrest him, hacker Chris Paget went ahead with a live demonstration of mobile phone interception at the Defcon hacking conference Saturday.
Using several thousand dollars worth of equipment, Paget was able to intercept mobile-phone data on the GSM (Global System for Mobile Communications) networks used by AT&T and T-Mobile. He did this using a home-made system he calls an IMSI (International Mobile Subscriber Identity) catcher.
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