Sony has denied the claims of DerpTrolling, a hacker group which claimed it had raided the databases of the PSN, along with a number of other online services.
The group had published a list of emails and passwords for PSN, Windows Live Mail and 2K Games accounts online, and claimed to be prepared to release more, but Sony says that they've come from other sources than hacking.
"We have investigated the claims that our network was breached and have found no evidence that there was any intrusion into our network," the company wrote in a declaration to Joystiq. "Unfortunately, Internet fraud including phishing and password matching are realities that consumers and online networks face on a regular basis. We take these reports very seriously and will continue to monitor our network closely."
GamesIndustry.biz requested statements from the companies involved last week, but none were forthcoming.