The PlayStation Network and Qriocity outage has been frustrating for users. Sony is working with law enforcement and a security firm to investigate the breach. Sony strongly recommends that users change their passwords once services are fully restored. Sony will not contact you in any way, including by email, asking for your credit card number, social security number or other personally identifiable information. Sony: We sincerely regret any inconvenience or concern this outage has caused, and rest assured that were going to get the services back online as quickly as we can.”]
Source: https://blog.playstation.com/2011/04/27/qa-1-for-playstation-network-and-qriocity-services/