Hackers have released details from about a million Apple device users while alleging the FBI is tracking citizen data.

Activist computer hackers from Antisec, a movement associated with the Anonymous collective, leaked iPad and iPhone data claimed to have been obtained from Christopher Stangl, an FBI agent whose laptop was breached via a Java vulnerability. Unique Device Identifier numbers (UDIDs) are used by Apple to to label the users of iPhone and iPads. While full names and phone numbers were trimmed out of the data dump, the hackers' Pastebin suggests President Barack Obama's iPad UDID was among the information leaked.

The Next Web offers a tool allowing concerned users to find out if their device's information is among that released by Antisec.