In a digital age of healthcare, the security of patient files seems obvious. But in 2002? Not so much.

Entrepreneurs are often said to be soothsayers and in 2002, David Ting founded Imprivata, a healthcare IT security company focused on keeping medical files private and locked online, allowing doctor’s offices and hospital physicians to more easily sign in to secure networks, whether text messaging platforms, electronic medical records, or prescribing databases. In June 2014, a decade later, Ting took his Lexington-based startup public, raising $66.3 million through its IPO. This July, Imprivata announced they were being taken private again, having been acquired by private equity firm Thoma Bravo in a deal valued at about $544 million.

We sat down with Ting before the summer talk with him about entrepreneurship, being nimble, and understanding what it takes to enter a large market where the players seems well established and change the course.