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Yahoo hacked again

Yahoo, already reeling from its September disclosure that 500 million user accounts had been hacked in 2014, disclosed Wednesday that a different attack in 2013 compromised more than 1 billion accounts.
●    The two attacks are the largest known security breaches of one company’s computer network.
●    The newly disclosed 2013 attack involved sensitive user information, including names, telephone numbers, dates of birth, encrypted passwords and unencrypted security questions that could be used to reset a password. 
●    Yahoo said it is forcing all of the affected users to change their passwords and it is invalidating unencrypted security questions — steps that it declined to take in September.
●    It is unclear how many Yahoo users were affected by both attacks. 
●    The internet company has more than 1 billion active users, but it is not clear how many inactive accounts were hacked.
●    Yahoo said it discovered the larger hacking after analyzing data files, provided by law enforcement, that an unnamed third party had claimed contained Yahoo information.

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