It’s been a summer of cyber attacks with everyone from Yahoo and Twitter to eHarmony and LinkedIn getting hacked and now, to cap it all off, there is news of what could be the mother of all breaches.A hacker group has posted online one million identification numbers for Apple iPhones, iPads, and iPod Touches — all reportedly stolen from the laptop of an FBI agent.Even worse, those one million ID numbers may be just a sample of the data that was actually stolen. There may be 11 million more Apple device IDs yet to be released — many with full user names, addresses and telephone numbers attached.AntiSec, an antigovernment hacktivist group linked to the hacking collective known as Anonymous, is claiming responsibility for the data dump on Pastebin.“Why exposing [sic] this personal data?” the unnamed writer of the post asked. “Well, we have learned it seems quite clear nobody pays attention if you just come and say 'Hey, FBI is using your device details and information and who the [expletive] knows what the hell are they experimenting with that,’ Well sorry, but nobody will care."Apple unique device identification numbers (UDIDs) establish a single iOS device's identity in the Apple ecosystem, letting iTunes and app developers know which device is running what. It's what locks most iOS devices into installing only software from the iTunes App Store, and what lets game developers keep track of each user's high score.The hackers claim they were able to steal more than 12 million of these ID numbers, but, “we decided a million would be enough to release.” The Pastebin post also claims that the UDIDs were stolen thanks to an Anonymous hack into the laptop of FBI agent Christopher Stangl, a member of a New York-based cybercrime task force.Stangl has spoken publicly on matters of cybersecurity, appearing in February 2011 on a panel discussion on cybercrime. He was among 44 American and European law-enforcement personnel copied on an e-mail sent in January 2012 inviting recipients to join a conference call to discuss efforts against the hacktivist groups Anonymous and LulzSec.Anonymous intercepted the email and used it to eavesdrop on and record the conference call, which they then posted online in February 2012.This week’s hack was announced through a widely-watched Twitter feed, @AnnonymousIRC on Monday night.To check whether your iPhone, iPad or iPod Touch's UDID might be among those affected, a Unix developer based in Florida has already posted a tool: http://kimosabe.net/test.html.Apple UDIDs can be found by plugging a device into a computer, opening iTunes and clicking on the device serial number displayed.