A Blockchain-based Communication Non-repudiation System for Conversational Service

Communication non-repudiation not only can reflect the users' recognition of the communication process, but also is an important way to trace the trust relationship and resolve trust disputes. However, in the case of conversational service, existing traditional solutions can no longer work. Conversation oriented non-repudiation system should consider the characteristics of real-time scenario. In this context, a system of communication non-repudiation for conversational service based on blockchain technology (B-CNr) is proposed. With the advantage of centerless feature in blockchain, the distribution of communication evidence can easily and quickly trace the communication users and verify the communication facts. The model and strategy of B-CNr are illustrated, the design of communication evidence and corresponding process and policy are demonstrated as well. The proposed model is realized on Ubuntu platform and has satisfactory performance.