Yahoo Says One Billion Accounts Exposed In Newly Discovered Security Breach

[Ron Burgundy]

News of that attack, which affected at least 500 million accounts, prompted Verizon Communication Inc to say in October that it might withdraw from an agreement to buy Yahoo's core internet business for $4.83 billion. A Yahoo spokesman told Reuters that the company has been in communication with Verizon during its investigation into the breach and that it is confident the incident will not affect the pending acquisition. Yahoo required all of its customers to reset their passwords - a stronger measure than it took after the previous breach was discovered, when it only recommended a password reset.

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