Ars Technica: "Sen. Al Franken (D-MN) wants answers. Security researchers today revealed the existence of a file on iPhones and on their computer backups that logs detailed cell phone triangulation data—and has ever since iOS 4 was released last summer. The information is stored unencrypted by default, and is simple to access. That announcement led Franken to fire off a two-page letter (PDF) today, asking nine pointed questions of Apple CEO Steve Jobs.
Franken first outlines scenarios in which the release of this data could pose a problem. "Anyone who gains access to this single file could likely determine the location of the user's home, the businesses he frequents, the doctors he visits, the schools his children attend, and the trips he has taken over the past months or even a year," he writes.
Which raises the obvious question: how would an attacker get access to the data? “It is also entirely conceivable that malicious persons may create viruses to access this data from customers' iPhones, iPads, and desktop and laptop computers,"