A serious ransomware attack called WanaCrypt0r is currently affecting a wide variety of people and companies in 74 countries. Among the first affected are multiple NHS hospitals in the UK, who have had crucial patient data taken hostage. The culprits demand a measly $300 to be paid in Bitcoin, which is often the cryptocurrency of choice for such nefarious acts. In response, affected hospitals with the National Health Service are cancelling appointments, and urging everyone who doesn’t have an emergency to stay away until the situation is resolved. The attackers, ransoming captured health data, underscore a fundamental truth of the modern internet: all data is a potential liability, and protecting sensitive data cannot simply be an afterthought.