GSM Security Risks and Eavesdropping Techniques via Low-Cost Devices

Whatever assurances have been given about the security of GSM cellphone calls, forget about them now. Speaking at the Chaos Computer Club (CCC) Congress here Tuesday, a pair of researchers demonstrated a start-to-finish means of eavesdropping on encrypted GSM cellphone calls and text messages, using only four sub-$15 telephones as network While such capabilities have long been available to law enforcement with the resources to buy a powerful network-sniffing device for more than $50,000 (remember The Wire?), the pieced-together hack takes advantage of security flaws and shortcuts in the GSM network operators

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