Social networking website LinkedIn has admitted around six million users of its website have had their passwords stolen.
A file containing details of 6.5 million passwords without usernames appeared on a Russian website yesterday and experts are now advising users to change their passwords for LinkedIn.
LinkedIn is emailing all users who may be affected with instructions on how to reset their passwords securely as they will no longer be able to use their current password to get onto the site.
These emails will not include any links for security reasons, and users will also receive a second email from the customer service team explaining why the changes are needed.
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Vicente Silveira, spokesperson for LinkedIn, says: "We sincerely apologise for the inconvenience this has caused our members. We take the security of our members very seriously."
It’s also important to change your password if you use the same one for several websites.
"For a number of years, the experts have been urging people not to have one password for all their different online activities," explains Neil Munroe, spokesperson for Equifax.
"Many people will initially think it’s not a big concern because they don’t use LinkedIn for financial transactions. But the reality is that often the same user name and password are used for many of their online activities as they do for LinkedIn," he adds.