Access control method and system based on block chain technology

Abstract

The invention provides an access control method and system based on block chain technology. The block chain technology is combined with attribute-based access control in the method, and the method comprises the following steps: adding an object in a chain, binding a judgment process of attribute and strategy on all block chain nodes with reference to the strategy. The access authorization is converted from a centralized manner into a distributed manner, the consistency check of the judgment results in the whole network is achieved by using a consensus mechanism of the block chain, and the authorized operations for accessing the recorded transactions are permanently recorded on the block chain. The method has the advantages of anti-single point failure, flexible authorization mode, accurateaccess boundary, and record auditability. The access control method and system provided by the invention are applicable to operating environments such as enterprises and governments that have the need of data privacy protection and realize multi-branch cooperation work based on a block chain platform, the access permissions of users in the system can be dynamically and scalably managed, fine-grained permission management is achieved for the strategy and the attribute, and the access control method and system are of important practical significance for protecting the security of information systems in a distributed network environment.

Description

technical field [0001] The invention relates to a security access method based on blockchain. Combining the existing attribute-based access control architecture with the existing characteristics of the blockchain platform to form an access control method and system based on blockchain technology, an access control method and system based on blockchain technology. Background technique [0002] Blockchain technology has attracted widespread attention due to its characteristics of decentralization, non-tamperability, and open and transparent data, and it has been used in various fields to try to solve the inestimable losses caused by lack of trust. Its first application of Bitcoin The potential and feasibility of this technology has been demonstrated in years of trials and stable operation. Blockchain is essentially a distributed accounting system, which is jointly operated and maintained by multiple nodes in the network using peer-to-peer technology, and each node holds a bac...

AI Technical Summary

Problems solved by technology

[0005] 1) Reduced reliability: Due to the additional authorization center, users are required to access through a unified interface, so that the distributed structure is transformed into a centralized structure. A single point of failure of the authorization center will cause the authorization mechanism to be unavailable, reducing the system's reliability. reliability

[0006] 2) Insufficient diversification: The openness of blockchain increases the uncertainty of user scale and identity, and traditional access control cannot define enough methods to meet all possible situations

[0007] 3) Lack of scalability: the authorization center pre-defines the authorization management of users and specifies which data on the blockchain users can access. However, the dynamically changing users in the blockchain will make this method lack of scalability and difficult to adapt to the system. User Dynamics

[0008] 4) High management overhead: The scale of users in the blockchain is large, and users can join and leave dynamically, requiring the authorization center to frequently establish permission mappings for different users, which increases management overhead

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