"In a Capitol Hill hearing room two summers ago, privacy activist Christopher Soghoian organized a stunning demonstration of some new police surveillance technology. A small group of congressional staffers were handed "clean" cellphones and invited to start calling each other while, off to the side, a Berkeley communications researcher named Kurtis Heimerl turned on his gear. After a few minutes, Soghoian told the staffers to hang up—and then Heimerl played back their conversations. Not only that, the two men told the staffers, the digital eavesdropping equipment was capable of sucking all the data from their phones—emails, contact files, music, videos—whatever was on them."
