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Query-chain: Fast and Flexible Blockchain-based Platform for Diverse Application Services

With increasing interest in blockchain for its immutability and decentralization, numerous blockchain-based systems and applications have been proposed, and many more attempts are underway to utilize the technology. However, several challenges such as low processing speed, scalability, and vulnerability to certain attacks have been identified, making it difficult to apply the technology on general industrial applications. In this paper, we propose a new application service platform architecture on top of blockchain that resolves those challenges. The proposed architecture takes advantage of private blockchain to secure processing speed and security while allowing public open use of the system by dividing the system into multiple layers. Assuming arbitrary nodes can participate in service, we propose periodic node verification process and ‘query-chain’ to effectively authenticate and validate arbitrary nodes.