Bluetoad develops digital distribution technologies. Its products include custom iOS and Android apps that magazine and newspaper publishers use to distribute their titles to mobile users. The company claims that the hundreds of iPad and iPhone apps it developed for its customers are used to publish more than 2,000 titles in digital format every month.

"A little more than a week ago, BlueToad was the victim of a criminal cyber attack, which resulted in the theft of Apple UDIDs from our systems," Paul DeHart, CEO and president of Bluetoad, said Monday in a . "Shortly thereafter, an unknown group posted these UDIDs on the Internet."

On Sept. 3, a group of hackers claiming to be affiliated with Anonymous and its Antisec hacking campaign containing 1 million Apple unique device identifiers (UDIDs) together with their corresponding Apple Push Notification Service tokens and device names.

The hackers claimed the leaked data was part of a database of more than 12 million UDIDs, which also included zip codes, cellphone numbers and addresses, that they stole from the compromised laptop of an FBI agent.

The FBI the claim that the laptop of one of its agents had been compromised. The agency said it never sought nor obtained the data released by the hackers.