Many people were quick to wonder and worry about whether the recent hacking of the RSA
(the security branch of EMC) had the potential of harming Blizzard's authenticators or authentication software. Fear not, as the blues have chimed in with a response:
RSA Hack and Blizzard Authenticators
The Blizzard Authenticators are based off modified Vasco tokens. I'm sorry to hear about RSA's troubles, but it will not affect the Blizzard Authenticator.
It doesn't look like Blizzard will be harmed by this at all. As a reminder, please keep your account safe by not clicking links in emails that don't appear to be from Blizzard, always check your email headers for incoming email addresses, and if you have any questions about whether an email is legitimate, contact Blizzard first. And do please get an authenticator for your account. Check out some of our own security articles here