What’s the actual cost to a business of a data breach?

Cisco has released the 10th of its annual cybersecurity reports, leading some publications to scream that security breaches can cost businesses 20% of their annual turnover. If you burrow into the headlines, however, it becomes apparent that only a third of the companies questioned in the (admittedly substantial) survey claimed such a loss. Other reports place the value much, much lower – but nobody is denying it’s a problem or that it’s...

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