Earlier this year, administrators at Hollywood Presbyterian Hospital suddenly discovered they had lost access to their computers. Doctors were locked out of their patients’ medical records, and they couldn’t access their own reports. Their system data had been encrypted by malicious software. While all this data was being held hostage, staffers had to direct sick people to other hospitals. After two weeks of writing everything down on paper, the hospital paid a $17,000 ransom in Bitcoin to regain access to their computer systems. Ransomware not only cost money; it endangered lives.