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NSA can decode many GSM cellphone calls

By Jon Fingas

The NSA may say that its phone surveillance efforts focus on metadata rather than the associated calls, but we now know that the agency can listen to many of those conversations whenever it wants. Documents leaked to the Washington Post by Edward Snowden confirm that the NSA can decode GSM-based cellphone calls without obtaining the encryption keys. The ability isn\’t surprising when GSM has known weaknesses, but the document suggests that the NSA (and potentially other US agencies) can easily process cellphone calls worldwide. Not surprisingly, the intelligence branch argues that such cracking is necessary — folks on both sides of the law use encryption to hide information, after all.

via NSA can decode many GSM cellphone calls.

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