Yahoo Inc. disclosed another security breach Wednesday, and said more than 1 billion users’ accounts could be affected, double the number of affected users Yahoo claimed in an earlier hack that was believed to be the largest on record. In an announcement Wednesday afternoon, Yahoo said that a trove of information passed on from law enforcement in November appears to be user data stolen in August 2013. “The stolen user account information may have included names, email addresses, telephone numbers, dates of birth, hashed passwords (using MD5) and, in some cases, encrypted or unencrypted security questions and answers,” Yahoo said in its announcement. Yahoo said in September that a hack in 2014 accessed data from about 500 million users, and specified Wednesday that this trove of data is believed to be from a separate incident. The troubled internet company has agreed to be purchased for $4.8 billion by Verizon Communications Inc. , but reports have said Verizon is looking for a discount after the earlier hacking. Yahoo shares fell 2.5% in late trading Wednesday.
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