Undeniable Vaccine Production Protocol with Blockchain and IPFS

Vaccination is the most effective way to prevent related diseases, and the age distribution ranges from infants to the elderly, so people are hesitant to get vaccinated when they are not sure whether the vaccine is safe, and due to the expiration of vaccines and vaccine fraud, people are concerned about the process of vaccine production. Concerned and distrustful of vaccine production companies, in order to prevent companies from modifying or falsifying the data in the vaccine production process without permission and making the data related to the production process correspond to the product. There is a secure and public data storage space as a traceable basis for problems can be used in the product in the future. This paper designs a vaccine product safety production process supervision system based on blockchain and IPFS, so that the current data of the vaccine production process is stored in a decentralized space, and the data of each machine in the production process of the vaccine enterprise is hashed and calculated. A digital signature together with the timestamp is used as the undeniable data of the machine to ensure the security and non-repudiation of the data generated by each machine during the vaccine production process, and the hash operation prevents the production data of the manufacturer from leaking. At the same time, it allows government examiners to track the production process of each batch of vaccine through encrypted data stored in the blockchain and IPFS to prevent companies from privately modifying or falsifying data, and allows examiners to pass certain data with a highly trusted Decentralized storage space to assist it in judging whether the enterprise has committed illegal activities, and use the above methods to implement a decentralized supervision system for the safety production process of vaccine products.