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A comment on Signs of Secret Phone Surveillance Across London. Parent comment

Re:Signs of Secret Phone Surveillance Across London by nabla9 on Friday January 15, 2016 @08:20AM (#10909091)
Government officials have data mining algorithms that detect patterns in cellphone disappearances.

Big city with millions of people. Two or more cellphones disappear when they approach the same part of the city. When this happens few times, you might get flagged.

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Re:Signs of Secret Phone Surveillance Across London by rwmj on Friday January 15, 2016 @09:00AM (#10909299)
Good luck separating the signal from the noise of people disappearing into the Tube / buildings / running out of battery.
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