Estonia’s healthcare system has been revolutionized by innovative e-solutions. Patients and doctors, not to mention hospitals and the government benefit from the convenient access and savings that e-services have delivered. Each person in Estonia that has visited a doctor has an online e-Health record that can be tracked. In order to keep health information completely secure and at the same time accessible to authorised individuals, the electronic ID-card system uses KSI Blockchain technology to ensure data integrity and mitigate internal threats to the data.