The massive data breaches that have hit the headlines in recent years, including Yahoo, Verizon, and particularly Equifax, have taken a toll on breach victims, consumers, and corporations. We’ve seen stocks drop precipitously, class-action lawsuits filed, CEOs shown the door, and executives called before Congress. This year, breaches could be even more costly for companies once the European Union’s General Data Protection Regulation (GDPR) rules are in place come May 25.