Securing Healthcare Book through Public Blockchain and Elliptic Curve Cryptography

International audience Healthcare systems and services vary from one country to another due to States' policies. The healthcare book, whenever digital or physical is a patient health history record. This record provides sustainable and traceable health pattern for medical doctors in patient examination cases. Unfortunately in most developing countries, such documents are not kept safely by their owners. Moreover, many developing countries do not have digital systems for healthcare management. When healthcare systems exist, data are not stored nor secured to prevent information to be altered. To overcome these problems and to avoid patient data lost, we developed the healthcare digital book by using a public blockchain Ethereum. Due to the medical information criticality, we have added an encryption layer by using elliptic curve cryptography in order to use short key sizes and ensure considerable robustness of the cryptosystem. Thus, we obtain smaller cryptograms and therefore use less Gas fees in comparison with other cryptographic algorithms. Smart contracts are unit-tested to guarantee all functionalities as expected. Due to the benefits of this technology, the digitized healthcare book shall guarantee data integrity, confidentiality and provide secure information to doctors for various medical exams, patients' pathologies and so forth.