Consensus protocol-based information security interaction method and system

The invention provides an information security interaction method and system based on a consensus protocol, and relates to the technical field of information interaction.The method comprises the steps that participants of information interaction are defined; the user side participates in information interaction, and identity authentication is completed according to the interaction key received by the first sender; performing encryption processing according to the interaction key, and determining a plurality of verification parties; establishing a consensus protocol, and determining a protocol target; the integrity of the first interaction information is calculated, authenticity calculation is carried out through the first receiver according to the participation conversion of the first sender, and first consensus verification information is obtained; and decrypting the first consensus verification information based on the interaction key, thereby solving the technical problem of low data transparency caused by