AHuxley (892839) writes "The Sydney Morning Herald is reporting that Australian federal and state police are using a no warrant cell phone tower metadata access technique called a "tower dump".
A "tower dump" provides the identity, activity and location of all cell phones that connect a cellphone tower(s) over time (an hour or two). The metadata from thousands of phones and numbers connected are then sorted. Australian law-enforcement agencies made 330,000 requests for metadata in 2012-13.
Some US views on the same legal issues:
Judge Questions Tools That Grab Cellphone Data on Innocent People (Oct 22, 2012)
Will Telcos Follow ISPs and Extend Warrant Protection for All? (JUNE 17, 2014)
"Lawsuit seeks details on Chicago Police purchases of cellular tracking gear" (June 10, 2014)
"Records from more than 125 police agencies in 33 states revealed one in four used a tactic called a “tower dump,”....""
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