cryptogon.com

The Transportation Security Administration is looking at installing devices in airports that home in and detect personal electronic equipment. The aim is to track how long people are stuck in security lines.

Information about wait times could then be posted on websites and in airports across the country.

“This technology will produce valuable data that can be used in a variety of ways,” TSA spokeswoman Lauren Gaches said, noting it could help prevent checkpoint snarls.

But civil-liberties experts worry that such a system enables the government to track people’s whereabouts. “It’s serious business when the government begins to get near people’s personal-communication devices,” said American Civil Liberties Union privacy expert Jay Stanley.

The TSA is in the early phases of exploring the technology, which Purdue University researchers tested for a month last year at Indianapolis International Airport. Thumbnail-size receivers near checkpoints detected serial numbers emitted by some electronic devices being carried by passengers. The receivers recorded the time when a passenger entered a security line and the time when the same passenger cleared the checkpoint, Purdue transportation engineer Darcy Bullock said. Only part of each serial number was recorded, and the numbers were quickly deleted, he said.

Some electronic devices automatically broadcast, or “chirp,” their serial number every 15-20 seconds when they are turned on. People can set their devices so they don’t broadcast. Bullock found he could detect signals from 6% to 10% of Indianapolis passengers. “We sit there and listen, capturing the unique identifier,” Bullock said.