Yahoo says hackers stole information from over 1B accounts

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New York, Dec 15: Yahoo says it believes hackers stole data from more than one billion user accounts in August 2013, in what is thought to be the largest data breach at an email provider.

The Sunnyvale, California, company was also home to what's now most likely the second largest hack in history, one that exposed 500 million Yahoo accounts. The company disclosed that breach in September.

yahoo

Yahoo said it hasn't identified the intrusion associated with this theft. Yahoo says the information stolen may include names, email addresses, phone numbers, birthdates and security questions and answers. The company says it believes bank-account information and payment-card data were not affected.

But the company said hackers may have also stolen passwords from the affected accounts. Technically, those passwords should be secure; Yahoo said they were scrambled twice once by encryption and once by another technique called hashing.

But hackers have become adept at cracking secured passwords by assembling huge dictionaries of similarly scrambled phrases and matching them against stolen password databases. That could mean trouble for any users who reused their Yahoo password for other online accounts.

PTI

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