What do you call software that collects and sends information about you to its developers, advertisers, and others? On a desktop, we’re likely to name it spyware.
But on a cell phone, tablet, or other mobile device we call it an app — never realizing that it might be operating much like spyware.
As difficult as the issues surrounding privacy on a desktop computer can be, they’re virtually child’s play compared to the issues that arise with mobile devices — which, at the very least, must identify themselves to gain access to public Wi-Fi or cellular networks. Cellular devices do this through a unique identification number attached to every voice call or data request — an ID that networks store as long as your device is turned on, whether it’s in use or not.
The closest equivalents in the desktop space are tracking cookies, which we have the freedom to delete. “With mobile device identifiers, there’s no ability to delete or opt out,” says Ashkan Soltani, an online privacy consultant who recently testified (PDF file) about mobile privacy issues before the U.S. Senate Judiciary Subcommittee on Privacy, Technology and the Law.