The FBI on Tuesday shot down hacker group AntiSec's claims that it compromised an FBI agent's laptop and found IDs for more than 12 million Apple devices, saying it had "no evidence" at this time that such a breach occurred.
“The FBI is aware of published reports alleging that an FBI laptop was compromised and private data regarding Apple UDIDs [unique device identifiers] was exposed," the FBI said in a statement. "At this time, there is no evidence indicating that an FBI laptop was compromised or that the FBI either sought or obtained this data.”
The UDIDs used by Apple are a unique string of identification numbers and letters assigned to iPhones, iPads and iPod Touch devices.
The FBI also vehemently denied AntiSec's claims on its press office's Twitter account, saying in a tweet: "We never had info in question. Bottom Line: TOTALLY FALSE."
That set off a Twitter war with an account associated with the hacker collective Anonymous, @AnonymousIRC, which tweeted back at the FBI press office account: "Wait, what? So because you don't know of any data breach it never happened? So the conference call was fake, too? ;-)"
The conference call mentioned in the tweet refers to a call between Ireland's national police service, the FBI and other law enforcement agencies earlier this year about international investigations into hacking groups that was tapped into by a hacker associated with Anonymous.
The Anonymous-associated account also tweeted: "You know you're doing something right if @FBIPressOffice throws caps at you on twitter [sic] to deny an #Anonymous statement."
AntiSec, which is associated with the hacker group Anonymous, alleged that it hacked into FBI cyber agent Christopher Stangl's laptop and accessed a list of more than 12 million Apple UDIDs and also zip codes, user names, mobile numbers and other personal information about device owners.
In a post on Pastebin, the hacker group claimed to have released 1 million Apple UDIDs from the breach and said it stripped out personal data from the IDs, such as full names, mobile numbers, addresses and zip codes. AntiSec said it decided to publicly release the data because it suggested that the FBI was collecting the device information for some sort of a tracking project, or another suspicious purpose.
Apple has so far remained quiet about the alleged breach and has not responded to requests for comment.
This post was updated at 12:26 a.m.