An access control method and system based on blockchain technology

Abstract

An access control method and system based on blockchain technology, which combines blockchain technology with attribute-based access control, including: object attributes are entered into the chain, and based on policies, the judgment process of attributes and policies is bound on all blockchain nodes. Change the access authorization from centralized to distributed, use the consensus mechanism of the block chain to realize the consistency check of the judgment results in the whole network, and permanently record the authorization operation of the access record transaction on the block chain. This method has the characteristics of anti-single point failure, flexible authorization mode, precise access boundary, and auditable records. The present invention is applicable to enterprises, governments, etc. that have data privacy protection requirements and realize multi-branch collaborative work environment based on the block chain platform, and can manage the access rights of users in the system in a dynamic and scalable manner, and realize it around policies and attributes Fine-grained authority management has important practical significance for protecting information system security 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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