Quote from: Blizzard (Source)
As some of you may know, Valve Software recently announced that certain Steam user account information was compromised by an illegal and unauthorized intrusion into their network. The statement from Valve on these events can be found here:
If you’re a registered account holder with Steam, we encourage you to review the information provided by Valve as soon as possible. We also recommend that you update your Battle.net password via Account Management (https://us.battle.net/account/management) should it be the same as or similar to the one you used for Steam or for the Steam forums. You may also wish to change your registered email address as a further security measure, or to change the password to your email account and other online accounts that might be at risk of compromise. If you are unable to update your Battle.net email address and/or password on your own, please contact our customer support staff for assistance: http://us.blizzard.com/support/webform.xml
For additional tips and suggestions for how to improve your Battle.net account security, such as by adding a Battle.net Authenticator to your account, check out our Account Security Awareness guide (http://us.battle.net/en/security/) and blog post (http://us.battle.net/wow/en/blog/2299938).
Det direkte link til announcement fra Valve er her: http://forums.steampowered.com/forums/announcement.php?f=14
Valve wrote:Originally Posted by Gabe Newell
Dear Steam Users and Steam Forum Users:
Our Steam forums were defaced on the evening of Sunday, November 6. We began investigating and found that the intrusion goes beyond the Steam forums.
We learned that intruders obtained access to a Steam database in addition to the forums. This database contained information including user names, hashed and salted passwords, game purchases, email addresses, billing addresses and encrypted credit card information. We do not have evidence that encrypted credit card numbers or personally identifying information were taken by the intruders, or that the protection on credit card numbers or passwords was cracked. We are still investigating.
We don’t have evidence of credit card misuse at this time. Nonetheless you should watch your credit card activity and statements closely.
While we only know of a few forum accounts that have been compromised, all forum users will be required to change their passwords the next time they login. If you have used your Steam forum password on other accounts you should change those passwords as well.
We do not know of any compromised Steam accounts, so we are not planning to force a change of Steam account passwords (which are separate from forum passwords). However, it wouldn’t be a bad idea to change that as well, especially if it is the same as your Steam forum account password.
I am truly sorry this happened, and I apologize for the inconvenience.