Distributed secure communication method and system based on block chain

Abstract

The invention provides a distributed secure communication method based on a block chain. The distributed secure communication method based on the block chain comprises the steps that system public parameters are generated and written in the block chain; each user generates a public key and a private key according to the system public parameters, and writes the public key into the block chain, wherein the users include communication initiators and communication receivers; the communication initiators perform encryption processes according to the public keys of a group of the communication receivers and generate session key-related parameters and ciphertext data, and the session key-related parameters and ciphertext data are written into the block chain; and each communication receiver readsthe relevant session key-related parameters and ciphertext data from the block chain to restore session keys, and further performs decryption to obtain plaintext data. By use of the method, the session keys are processed, distributed and restored in a distributed environment, and the data is encrypted and decrypted, so that the privacy of the session keys and the user data in a transmission process can be guaranteed.

Description

technical field [0001] The present invention relates to the field of information security cryptography, in particular to a blockchain-based distributed secure communication method and system. Background technique [0002] With the rapid development and popularization of information technology, various smart devices have been gradually applied to all aspects of people's work and life. When people hold smart devices to work in the field, they are often required to be able to conduct self-organizing networking and cooperate with each other to complete target tasks. During this process, each smart device, as a distributed communication node, needs to be able to maintain effective communication with other nodes, and needs to be able to effectively verify the source of the received information. In addition, in some special application scenarios, it is often necessary to retrospectively audit all previous communication information, such as tracking the source of malicious informat...

AI Technical Summary

Problems solved by technology

Although the hybrid encryption method here improves the computational efficiency to a certain extent compared with the broadcast encryption technology alone, it still does not solve the verification and auditing problems of communication sources

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