The Cumulative Effect of Major Breaches: The Collective Risk of Yahoo & Equifax
Until quite recently, people believed that a dizzying one billion accounts were compromised in the 2013 Yahoo! breach… and then it was revealed that the real number is about three billion accounts.
That raises the question: so what? Isn’t all the damage from a four-year-old breach already done?
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Story added 7. December 2017, content source with full text you can find at link above.