Does anyone know the real cost of a data breach? This is a question that has been asked both in the board room and by researchers in the security industry ever since the first big data breaches began grabbing major headlines more than a decade ago.

Recent events and the rise in mega breaches are shedding light on how much mega data breaches can cost companies. Yahoo is just beginning to comprehend the cost of its data breach. The latest news reports say it may end up costing the company and its shareholders one billion dollars. At least that is the discount Verizon is reportedly considering following its $4.8 billion offer to purchase the company.

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