Last week brought some bad news for mobile phone users. German security expert Karsten Nohl demonstrated how easy it is to eavesdrop on GSM-based (Global System for Mobile Communications) cellphones, including those used by AT&T and T-Mobile customers in the U.S.
Nohl, who has a doctorate in computer engineering from the University of Virginia, made headlines previously by publicizing weaknesses in wireless smartcard chips used in transit systems around the globe.
Nohl was interviewed by CNET at the end of last week about his latest work and what the implications are for the more than three billion GSM mobile phones worldwide, representing about 80% of the market, according to the GSM Alliance.
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