Part 1. Blockchain in healthcare is a rapidly growing niche, with companies like Hashed Health, Patientory and PokitDok leading innovation in the use of distributed ledger technology for electronic medical records and other applications. Blockchain, though not necessarily the right solution for every problem, is helping with issues in healthcare technology surrounding patient privacy, control of patient data, and health data security. Kristen Johns is a patent attorney at Waller Law, who works with clients on patent and trademark protection, data privacy and security matters, cybersecurity and cloud-related issues. In the past couple of years, she’s been digging into blockchain as an emerging technology, looking at its applications and trajectory across industries including healthcare.