Millions of LinkedIn passwords reportedly leaked online

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A hacker says he’s posted 6.5 million LinkedIn passwords on the Web — hot on the heels of security researchers’ warnings about privacy issues with LinkedIn’s iOS app.

Update 1:08 p.m. PT: LinkedIn confirms that passwords were “compromised.”

LinkedIn users could be facing yet another security problem.

A user in a Russian forum says that he has hacked and uploaded almost 6.5 million LinkedIn passwords, according to The Verge. Though his claim has yet to be confirmed, Twitter users are already reporting that they’ve found their hashed LinkedIn passwords on the list, security expert Per Thorsheim said.

LinkedIn revealed through its own tweet that it’s looking into reports of stolen passwords, and it advised users to stay tuned for more information.

Many of the hashes include the word “linkedin,” which The Verge believes lends credibility to the reports.

LinkedIn passwords are encrypted using an algorithm known as SHA-1, which is considered very secure. Complex passwords will likely take some time to decrypt, but simple ones may be at risk.

Sophos security expert Graham Cluley is advising LinkedIn users to change their passwords as soon as possible, at least as a precaution. If the report is true, then hackers are undoubtedly working hard to decrypt the hashed, or unsalted, passwords.

“Although the data which has been released so far does not include associated email addresses, it is reasonable to assume that such information may be in the hands of the criminals,” Cluley added.

The report of the leaked passwords comes hard on the heels of word from security researchers that LinkedIn’s iOS app is collecting information from calendar entries — including passwords — and transmitting it back to the company’s servers without users’ knowledge.

In response to concerns over this collection of data, LinkedIn yesterday tried to explain how and why it captures this information.

The company acknowledged that it picks up information from the Calendar app on your iOS device to try to sync any appointments listed with fellow LinkedIn users. The feature is opt-in, so users of the LinkedIn IOS app can turn off the ability to “Add Calendar” in the Settings screen.

The details sent to LinkedIn’s server include the e-mail addresses of the people you meet with, the meeting subject, the location, and any meeting notes. The calendar data is sent securely using SSL encryption and isn’t shared or stored, LinkedIn added.

But in a concession to concerned users, the company has promised two tweaks to the feature. It will no longer pick up meeting notes from your calendar. And it will add a “learn more” link to explain how your calendar data is being used.

LinkedIn did not address the question of whether passwords are being collected along with the meeting information.

To change your LinkedIn password, log onto your account. Click on your name in the upper right corner and then click on the link for Settings. In the Settings section, click on the Change link next to Password. You’ll be prompted to to enter your old password and then create a new one. Aim to pick a complex password that’s not easy to decipher. Then click on the Change Password button.

CNET contacted LinkedIn for further details and will update the story when we get more information.

About Author: 

Lance Whitney wears a few different technology hats–journalist, Web developer, and software trainer. He’s a contributing editor for Microsoft TechNet Magazine and writes for other computer publications and Web sites. Lance is a member of the CNET Blog Network, and he is not an employee of CNET.

Srinivas Katam

Do you need help growing your business? Srinivas Katam is a Digital Marketing Strategist and Consultant with over 200 successful SEO and Social Media client engagements completed. I’ve worked with brands across the world as a digital marketing consultant to deliver revenue growth from content-focused inbound marketing campaigns. He has been partnering with companies like yours for more than 13+ years to provide more traffic with better results. He is an Innovative Marketer who specializes in digital marketing, specifically in social media, SEO and online strategy.

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