Sony confirmed earlier this week that its , and that there was a chance its customers' credit card numbers may have been compromised.

On Thursday, Trend Micro researcher Kevin Stevens : "The hackers that hacked PSN are selling off the DB [database]. They reportedly have 2.2 million credits cards with CVVs." CVVs are Card Verification Values, the security codes required for online transactions.

His source was chatter in underground hacker forums. "I have not seen the DB so I can not verify that it is true," he added.

A few hours later, Stevens seemed to think his tweet was being taken too seriously. "This #PSNHack is turning into a bunch of FUD, it really is. I posted up what I saw to warn people, not to incite the masses to create FUD," he wrote.

Later on Friday a Trend Micro spokesman declined to comment on the matter. A second company, Isec Partners, that had also claimed to see online discussion of the PlayStation Network hack, is also no longer talking publicly about the matter.