How Will LinkedIn Deal With This MASSIVE Security Breach?

LinkedIn (NYSE:LNKD) said it was investigating reports that 6.5 million user passwords had been leaked in what is a second big security breach for the social network recently. A Russian Internet forum user uploaded the encrypted passwords on the web and invited the hacking community to help with decryption. The passwords were made public without associated usernames, though it’s not clear if the hacker managed to get hold of the usernames as well.

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LinkedIn announced on Twitter that it was investigating the report, but in a later tweet said that it had been unable to confirm the breach.

Security researcher Graham Cluley told the BBC he believed the breach was genuine. “We’ve confirmed there are LinkedIn passwords in the data,” he said. “We did this by searching through the data for (hashed) passwords that we at Sophos use only on LinkedIn. We found those passwords in the data. We also saw that hundreds of the passwords contain the word ‘Linkedin’.”

Earlier this week, there were reports that the social network’s iOS app was collecting users’ calendar data and transmitting it to LinkedIn’s servers. The company updated its app for the Apple (NASDAQ:AAPL) operating system after the flaw was uncovered. LinkedIn’s mobile product head, Joff Redfern, also posted a statement on the company’s blog saying that a new “learn more” link would be added to the app so users had a better idea of how their information was being used.

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