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Yahoo tops the list of largest ever data breaches

The biggest data breach in history just got even bigger. Three times bigger.
Three billion accounts at Yahoo were affected by a massive hack in 2013, the internet firm’s parent company, Verizon (VZ, Tech30), revealed Tuesday. That’s up from the roughly one billion when Yahoo first revealed the breach last year. Reported on CNN
The latest disclosure cements Yahoo’s place at the top of a long and ignominious list of massive security breaches:
Related: Why major hacks will keep happening

Yahoo gets the top two spots on any list of security breaches.
In September 2016, Yahoo said that data associated with at least 500 million accounts had been stolen. Three months later, it disclosed a second breach — the one that’s now been revealed to have affected all three billion customer accounts that existed at the time.

Verizon said it revised up the number “following an investigation with the assistance of outside forensic experts.”
The epic security breaches were costly for Yahoo: Verizon slashed the price of its deal to buy Yahoo by $350 million and former CEO Marissa Mayer lost out on her cash bonus.
Two Russian spies were indicted over the smaller of the two hacks. It’s still unclear who was behind the bigger attack.

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