Q&A: How does Sony breach affect customers?

Sony's PlayStation network remains offline as the company works to improve security

Sony has revealed that the personal information of millions of users on the Playstation Network (PSN) and Sony Online Entertainment (SOE) system may have been stolen.

The online services hold a wealth of information on its users, including their name, home address, date of birth and credit card number.

Many users have expressed concern that they will now become the target of online fraud or e-mail scams.

I have an account on PSN and SOE - has my personal information been stolen?

Should I change my logon details for the PSN or SOE?

Can I do anything to stop hackers using the stolen data?

Is there anything else I should look out for?