The FBI's quick denial of the alleged breach comes even as some have begun looking elsewhere for the source of the leaked data. In a blog post, Marco Arment, a technology blogger based in New York, wrote Tuesday that a look at the data leaked by AntiSec suggests that it may have come from an application developer.
"All of this information could have been collected from an app transmitting data to a server," Arment wrote in his blog. "For instance, this is exactly the information that an ad network would want to collect. And in order to get stats from 12 million devices, it would probably need to be from a set of popular, free apps... where you'd probably see ads."
He pointed to a free identity theft protection application called AllClearID as a likely source of the data based on the name of the file containing the UDIDs that AntiSec said it had accessed from the FBI computer.
A spokeswoman for AllClear ID however denied Tuesday that it had been the source of the data leak and said the blogger had jumped to the wrong conclusion. "To clarify, AllClear ID does not collect, nor has it ever collected, UDIDs. This incident is not linked to AllClear ID."
Jaikumar Vijayan covers data security and privacy issues, financial services security and e-voting for Computerworld. Follow Jaikumar on Twitter at @jaivijayan or subscribe to Jaikumar's RSS feed. His email address is firstname.lastname@example.org.
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