In 2012, LinkedIn experienced a major data breach in which it was believed that hackers acquired 6.5 million passwords.
However, the breach was more significant than previously thought. LinkedIn released a blog post in which it said that an additional set of data has been released that claims to be e-mail and hashed password combinations of more than 100 million LinkedIn users.
LinkedIn said that it’s taking steps to invalidate these passwords and is contacting users to reset their passwords. It will also use automated tool to attempt to identify and block any suspicious activity.
The site says that you should change your password even if you haven’t received a notification. It adds that regularly changing your password on a regular basis is a good idea.