As if the fact that the ongoing PlayStation Network outage entering its sixth day weren't bad enough news for Sony, now comes word that the company isn't sure if the service's 75 million subscribers have had their personal information compromised.

　　PSN users may want to keep an eye on their credit card accounts.

　　According to a PC World report, Sony spokesman Satoshi Fukuoka said that the company had "not yet determined" if the confidentiality of PSN users' personal or credit card information had been undermined by the "external intrusion" that brought the network down. As of press time, Sony Computer Entertainment reps had not responded to requests for comment on the matter, and the official PlayStation Blog had not offered any updates on the situation regarding PSN users' information.

　　The cloud of uncertainty over the security of users' information is the latest development in the ongoing PSN outage saga. The crisis began Wednesday evening, when Sony took down the service with little explanation. Two days later, the hacker collective known as Anonymous--which had previously mounted attacks on the PSN--announced it was not sanctioning action against the PlayStation 3 and PSP's online service.

　　Then, late Friday, Sony revealed that an "external intrusion" was behind the PSN outage and said that it was conducting an investigation into the incident. Then, late Saturday, the company announced it was rebuilding the PSN infrastructure to ensure that "additional security" would be added to the network.