Blockchain based Security Trust Mechanism for Food Supply Chain Management in Smart City Environment

Security is a major concern in every domain whose breaches will result in significant loss of commodities and economy. Food supply chain also is one of the sensitive domain where security is a major concern. When considering the food supply chain in smart city environments, the designers need to be more vigil in identifying the loop holes of all the micro transactions. Since trust is a major concern in every offline transactions, the smart cities need to implement these trust ensuring methods in a false safe manner. We propose a block-chain based security mechanism to ensure trust among the participating authorities in a food supply chain of an arbitrary smart city environment. We keep track of the security concerns from the farmers through manufacturers, distributors, local retailers and consumers. In every stage, the transaction is secured using a block-chain mechanism that will ensure the security of transactional data using the credentials of every stake holders. For the ease of customers, we also developed a web and mobile application for tracing the quality of the food, through a series of authenticated signatures stored in a block-chain environment. We have used Flutter mobile application for user end and Remix IDE for Blockchain environment. We have performed a informal security analysis and found that comparatively our method of securing the transactions in a supply food chain exceed the modern state-of-the-art.