Note from Blizzard:

http://eu.blizzard.com/en-gb/securityupdate.html

Players and Friends,

Even when you are in the business of fun, not every week ends up being fun. This week, our security team found an unauthorized and illegal access into our internal network here at Blizzard. We quickly took steps to close off this access and began working with law enforcement and security experts to investigate what happened.

At this time, we’ve found no evidence that financial information such as credit cards, billing addresses, or real names were compromised. Our investigation is ongoing, but so far nothing suggests that these pieces of information have been accessed.

Some data was illegally accessed, including a list of email addresses for global Battle.net users, outside of China. For players on North American servers (which generally includes players from North America, Latin America, Australia, New Zealand, and Southeast Asia) the answer to the personal security question, and information relating to Mobile and Dial-In Authenticators were also accessed. Based on what we currently know, this information alone is NOT enough for anyone to gain access to Battle.net accounts.

We also know that cryptographically scrambled versions of Battle.net passwords (not actual passwords) for players on North American servers were taken. We use Secure Remote Password protocol (SRP) to protect these passwords, which is designed to make it extremely difficult to extract the actual password, and also means that each password would have to be deciphered individually. As a precaution, however, we recommend that players on North American servers change their password. Please click this link to change your password. Moreover, if you have used the same or similar passwords for other purposes, you may want to consider changing those passwords as well.

In the coming days, we'll be prompting players on North American servers to change their secret questions and answers through an automated process. Additionally, we'll prompt mobile authenticator users to update their authenticator software. As a reminder, phishing emails will ask you for password or login information. Blizzard Entertainment emails will never ask for your password. We deeply regret the inconvenience to all of you and understand you may have questions. Please find additional information here.

We take the security of your personal information very seriously, and we are truly sorry that this has happened.

Sincerely,
Mike Morhaime

No one is immune, apparently.

where are my free games!?

Damn scammers are getting desperate. I receive hacking atempts on my email almost everyday for World of warcraft since i unsubbed. Vicious hackers and scammers that want to hack your account desperately. Its an ugly sight.

I suppose they got the secret questions and authenticators so they get the rest with their keyloggers. They basically brought down blizzards security barriers...

I get daily phishing attempts for WoW and Diablo 3 even though I've never been a member for either.

and also, I thought getting hacked was a Sony exclsuive thing?

Hasn't their systems been hacked before last year or two?

It was Anonymous !!!

Someone should of hacked them when they thought of the brilliant idea of trying to implement a real id on the forums... At least someone should them how vulnerable they were when a Blizzard employee dared them to try and find out who he really was. Took less than a few hours before he got a phone call with someone stating off all his personal information (where he lived, etc).

yeah, last week I got an email from Blizzard notifying me that I was planning on selling my World of Warcraft account. The thing is, I don't think I have a Blizzard account, and I definitely do not have a WoW account.

Highly unlikely since authenticators automatically generate a new set of numbers every 20 seconds or so or every time you login to your account.

Ok, but think about it. How would your login know wich number is the right number? Obviously the algorythm for the login verification is stored on Blizzards files. The authenticator does not generate a new number every second like no one can see it. The algorythm is completely predictable on blizzards side, and from what i gather that info was stolen.