A data breach in August 2013 exposed information held in more than 1 billion Yahoo user accounts, the company said Wednesday.
The hacking incident is separate from an intrusion Yahoo reported in September, when the company disclosed 500 million user accounts were exposed in 2014.
"Yahoo believes an unauthorized third party, in August 2013, stole data associated with more than one billion user accounts," Yahoo said in a statement. "Yahoo believes this incident is likely distinct from the incident the company disclosed on September 22, 2016."
The information stolen may include names, email addresses, phone numbers, birthdates and security questions and answers. Payment card and bank account data were not believed to have been affected, the company said.
Yahoo, based in Sunnyvale, California, is in the process of being acquired by Verizon in a $4.8 billion deal. The company did not identify the "unauthorized third party" involved in the 2013 hacking.
雅虎公司星期三说,2013年8月发生的黑客袭击导致10亿个雅虎账号资料被窃。
雅虎9月份还曾披露2014年发生的一次黑客袭击,那次有5亿个用户的账号被袭击。
雅虎公司在声明中说:“我们相信,2013年8月,一个未经授权的第三方从10亿多个账户里盗窃了资料。我们相信,这起袭击事件很可能跟我们2016年9月22日公布的那起袭击事件是两次不同的黑客袭击。”
雅虎说,被盗窃的资料可能包括姓名、电邮地址、电话号码、生日和验证身份用的问题和答案,但是支付卡和银行资料应该没有受到影响。
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