Social network information access sharing method based on block chain

Abstract

The invention discloses a social network information access sharing method based on a block chain, and solves the problems of privacy disclosure, unsafe user data access and low efficiency in the aspects of access control and data availability. The system generates a social relation graph SRG; the data owner encrypts and uploads the ciphertext; customizing an access control strategy; inputting an original request OAR, perfecting the OAR according to the information in the PIP, and generating an RAAR; performing strategy judgment, and returning a judgment result; and if the judgment result is' PERMIT ', the data visitor decrypts the ciphertext. Through the block chain technology, the information access process is open and transparent, and business faking and responsibility investigation are prevented. Hierarchical relationship access control is introduced on a traditional attribute-based access control model, and through the hierarchical relationship and attribute-based access control method, the social network information sharing process is optimized, the sharing efficiency is improved, secure sharing is realized, finer-grained authorized access is realized, and illegal use of data in the information sharing and access process is avoided.

Description

Technical field [0001] The present invention relates to the field of blockchain technology, in particular to a blockchain-based social network information access sharing method. Background [0002] With the rapid development of blockchain technology, the application of blockchain technology to all walks of life is the general trend. The traceability and non-repudiation of the blockchain can solve the problem of finding the source of the problem in the release of network information, realize the query of data sources and the accountability of false information; The decentralized blockchain does not require any trusted third party to realize direct transactions between the two parties to the transaction, realize data sharing between networks, and solve the problem of relying on centralized platforms in data sharing; Publish the information release and access process to the blockchain, so that the access release process is effectively supervised, open and transparent. [0003] In th...

AI Technical Summary

Problems solved by technology

Although the traditional encryption mechanism can use encryption technology to protect the security of information, the traditional encryption mechanism can only perform one-to-one encryption, that is, information encrypted with a public key can only be decrypted with the corresponding private key.

Therefore, the traditional encryption mechanism can only guarantee the confidentiality of information, but cannot achieve flexible and fine-grained access control.

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