Phishing attacks over email could be another possibility.
Sony has said that it will not contact customers in any way, including via email, asking for credit card numbers, social security numbers or other personally identifiable information. If customers are asked for those kinds of information, they should know that the requests are not authorized by Sony, the company said.
But now that hackers have 77 million email addresses, Jones said spammers could easily create official-looking emails that appear to be from banks or credit card companies, carrying malicious Web links. Once clicked, those links could bury malicious code on people's computers or attempt to trick them into turning over important personal information, such as credit card information, bank account log-in data social media accounts.
Experts caution that you should be wary of unsolicited messages, especially when they include attachments and request information. If you receive a message from a company or your bank, skip the link in the email and go straight to their website, they say.
Jones also said you should consider changing the security questions connected to your accounts. Several sites use the same questions, and hackers could use them to try to gain access to other online accounts.
As for the scale of the PlayStation attack, some reports have called this the "biggest security breach ever," but Jones said that while it's significant, it's not quite as big other past security breaches. What makes this attack so jarring is the name of the company connected to it.
"This one has definitely taken more people by surprise because it's such a well-known company, and the brand trust we have in Sony is so huge," she said. "That's what gives it the bigger impact."