An Implementation and Evaluation of Blockchain-based Digital Health Passports

While several electronic apps help with contact tracing of COVID patients, and those apps do not prevent patients from getting in contact with healthy international travelers or audiences attending large gatherings. Medical tests are getting expensive, and individuals may falsify their test results when traveling. This paper aims to implement and evaluate a secure Digital Health Passport (DHP) using blockchain technology. Users (issuers, holders, verifiers) register in BigchainDB to create or view digital health certificates. The issuer has read-write access to upload test results and read-only access to holders and verifiers to guarantee tamper-free. The holders can share the test results using QR codes to verifiers. In this implementation, This research study use BigchainDB as the blockchain database. Then, DHP is evaluated based on the smart healthcare requirements and the key features of blockchain technology. The evaluation and discussions present that the DHP is secured, immutable and traceable. DHP use cases will be helpful as health identification cards in international tourism, attending nationwide events, workplaces and educational institutions, and the entertainment industry.