The hackers apparently were only able to download a portion of what was available. Users of SonyPictures.com are left hanging as to whether their personal details are part of the haul.

Gizmodo, which has as demonstrated last year with the stolen iPhone 4 prototype, said it won't store the email addresses you test. Still, you will want to be cautious. Its site hardly has a first-class record when it comes to security, .

There may be a far better way of checking user details against stolen data, as was , who provided a way for users to check their data against the Gizmodo theft. Moore required users first encrypt their data on a third-party website before checking it against a publicly accessible Google Docs spreadsheet that contains similarly encrypted data. This way no data was revealed, nor was anybody able to log it.

Sony's been a regular victim of hack attacks recently with the , , , , and a all falling victim. Experts are divided as to whether this is down to a sustained hacker campaign against the entertainment giant or whether Sony's systems simply have poor security. The hardware hacker that may have inspired the run of attacks and who cracked the PlayStation 3's encryption system, George Hotz, recently .