ABSTRACT
Several authorities require individuals to be vaccinated with WHO-approved vaccines to allow cross-border travel or access to public areas. Recently vaccination certificates have become crucial in curbing the spread of the corona virus. Therefore, it is crucial to ensure the integrity and authenticity of vaccination records. A secure mechanism is required to maintain the immunization records and issue an immutable vaccination certificate to individuals that may be used as a passport for uninhibited movement. We propose a blockchain-based solution that issues verifiable and trustworthy vaccination certificates for not just COVID-19 vaccines but also other diseases. Our proposed model reduces the time required to retrieve vaccination status. The solution is scalable due to its simplicity as it does not require multiple participants on the network for its operation. Moreover, the system can be easily integrated with existing enterprise applications for its functionality. © 2022 IEEE.