LONDON (AP) — Business social network LinkedIn said it is investigating reports that more than six million passwords have been stolen and leaked onto the Internet.
Although LinkedIn did not confirm if any user data had been hacked or leaked, researchers at U.K. Web security company Sophos say they have confirmed that a file posted online does contain, in part, LinkedIn passwords "hashes." That's a way of encrypting or storing passwords in a different form.
Graham Cluley, a consultant with Sophos, recommended that LinkedIn users change their passwords immediately.
LinkedIn has a lot of information on its more than 160 million members, including potentially confidential information related to jobs being sought. Companies, recruiting services and others have accounts alongside individuals who post resumes and other professional information.
There's added concern that many people use the same password on multiple websites, so whoever stole the data could use the information to access Gmail, Amazon, PayPal and other accounts, Cluley said.
Cluley said hackers are working together to break the encryption on the passwords.
"All that's been released so far is a list of passwords and we don't know if the people who released that list also have the related email addresses," he said. "But we have to assume they do. And with that combination, they can begin to commit crimes."
It wasn't known who was behind such an attack.
LinkedIn Corp. referred repeated requests for comment to the company's Twitter feed, where it said its team was "looking into reports of stolen passwords."
Two hours later, the company posted a second tweet saying that it was still unable to confirm if a security breach had occurred.
While the passwords appear to be encrypted, security researcher Marcus Carey warned that users should not take solace from such security measures.
"If a website has been breached, it doesn't matter what encryption they're using because the attacker at that point controls a lot of the authentication," said Carey, who works at security-risk assessment firm Rapid7. "It's 'game over' once the site is compromised."
He said that if the breach is confirmed, he expects LinkedIn to require users to change their passwords with the threat of locking them out of the site if they don't. Full containment of a breach would only be possible if every single password is changed or users are disabled, he said.
Cluley also warned that LinkedIn users should be careful about malicious email generated around the incident. The fear is that people, after hearing about the incident, would be tricked into clicking on links in those emails. Instead of getting to the real LinkedIn site to change a password, it would go to a scammer, who can then collect the information and use it for criminal activities.
Shares of LinkedIn, which is based in Mountain View, California, fell 36 cents, or 0.4 percent, to $92.64 in early afternoon trading Wednesday.
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This Week’s Celebrity Instagrams (10/15-10/21)
31 photos Launch gallery
1. Just a NY girl with BIG dreams....
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2. HAPPY CHILDREN=QUALITY PARENTING. We don't always see eye to eye on everything and that's normal. We're human beings. But we come together and do it right for what's important, the kids. We are not enemies, we are parents. And we are parents 1st. S/O to @monyettashaw for making Mason's bday memorable. S/O to @itscrystalsmith at home taking care of our other lil' Prince. ❤️❤️❤️ THIS IS WHAT CO-PARENTING LOOKS LIKE. #Blessed #Happy #AboveTheDrama #BiggerThanUs
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3. So happy to finally be able to share with you all that I’m the new Global Brand Ambassador for @Revlon! Follow my day on RevlonSnaps. Yay! Choose Love, Everybody! #RevlonXCiara #chooselove #ad
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4. Glam on point!!!@makeupbymotoko & @shaylinjoneshair #easybreezy @lifetimetv #beachesmovie #january2017 😘
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5. ✨True love ✨📸: @jessiemarrerophotography
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7. Today was not easy..but by the grace of God we all got through it. Words cannot express our gratitude for all of your Prayers, Positive thoughts and Support for us throughout the years. Tommy will be missed but most certainly never forgotten...And PLEASE don't ask "Where's Martin?.." he was there too...just not in this picture. Lol! God bless you all.. #LoveConquersAll #MartinShow
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9. West coast get ready for #RockyHorror. I will be live tweeting again. #letsdothetimewarpagain
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10. #THEKEYS pre order yours now ... Available everywhere #NOV22 #WeTheBest 🔑🔑🔑🔑🔑🔑🔑🔑🔑🔑🔑🔑🔑🔑🔑🔑🔑🔑🔑🔑
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11. We about to ROCK at #KCABlackBall!! All for our life-changing effort to end 🌎 AIDS.
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12. Today's #SNAPJACK is brought to you by @yazzthegreatest 😂😂😂💋💋💋
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13. Damn girl you kinda old to be headed to the Go Go. You coming in at the age they leaving. LMAO
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14. Daddy daycare B-Boxin with @acewellstucker @shopraisingace
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15. #FBF Naviyd & URV "LIL MONSTERS"
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16. HAPPY BIRTHDAY TO ONE OF THE BIGGEST LEGENDS IN OUR HIPHOP HISTORY! @snoopdogg CONTINUED BLESSING AND LOVE FAMILY!!!!! REAL OG!
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17. Thank you for a beautiful night VSU! Let's do it again! #HOMECOMING
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18. Had a great time this morning with my familia Erica, Griff & Truth!!
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19. Check out my interview on @essence facebook live. #inmyownwords #nycpromo #day2
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20. #She💋 #tbt #TheCoveAtTheAtlantis #DawgPawsAndAll
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21. Bae #retailtherapy
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22. Why me and @coryhardrict got the same pose... and notee... new mouth #naked
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23. When my husband is my personal 'hype-man'! it kills me every time! 💜😂 #WHATNOW #lostfiles📷
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24. Diggy Simmons
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25. Hand full of @jacquieaiche 💙💎💍 @esnail_la 💅🏾
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26. SuperSoulers! You can watch my interview with Carl Lentz live from my Facebook page, tomorrow at 11a ET| 8a PT. #SuperSoulSunday
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27. 💋 .. When the friendship is easy like Sunday morning. ☀️
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28. Sunday mornings are the best........... hugs and cuddles with my angel
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29. #huggar16 #hellohuggars
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30. My gym is everywhere!.. #RnBMoney #TheGeneral 📸: @twelvepastseven
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31. Nothing I would rather be doing... Rocko setting up our movie, Romelō working on a puzzle & Laiyah singing and sharing all she's learning at school... I'm so grateful for the joy they've brought into my life ... Praying for peace , joy & love in the home of EVERY family ♥️ #HeadScarfPJSunday LOL 😂
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