Abstract:

[Application background] With the wide application of social networks, the problem of network public opinion has attracted more and more attention. Blockchain technology helps to solve the problem of network public opinion. In terms of information dissemination mode, blockchain based social networks are very different from traditional social networks. [Objective] Revealing the charac-teristics of social network information dissemination based on blockchain will help to better manage public opinion. [Methods] Combined with the role of the blockchain trust mechanism and incentive mechanism, this paper introduces blockchain smart nodes based on the classical infectious disease model, and puts forward a new model of information dissemination in blockchain based social networks. [Conclusions] By solving the differential equations of the models and conducting empirical analysis of the data of Steemit and Microblog platforms, this paper believes that blockchain based social networks are more rational in user forwarding behavior than traditional social networks. Smart nodes help to control the spread of "distorted" or "uncertain" information, and also promote the generation of high-quality information to a certain extent.

Key words: blockchain, social network, public opinion, information dissemination, SIR model