An attribute reconstruction encryption method and system for permission chain data sharing and supervision

Abstract

The invention belongs to the technical field of block chains, and discloses an attribute reconstruction encryption method and system for permission chain data sharing and supervision. Its characteristics include that the permission chain authoritative organization acts as a data supervision organization to build an attribute management infrastructure for managing the attributes of the entire chain; the access tree submitted by the data release organization is reconstructed into a standardized access tree under the attribute management infrastructure; The standardized standard access tree trans-encrypts the ciphertext submitted by the organization, and converts personalized encryption and access control into full-chain standardized encryption and access control. This application can protect the privacy and security of uplink data through the cryptographic algorithm and license chain technology based on attribute encryption, realize fine-grained and flexible authorization of data, and use the invented attribute reconstruction encryption method and system to realize efficient encryption of encrypted data Supervision.

Description

technical field [0001] The invention belongs to the technical field of block chains, and relates to an attribute reconstruction encryption method and system for permission chain data sharing and supervision. Background technique [0002] The permissioned chain is a type of blockchain that each node needs to be licensed by an authoritative organization. After the identity is verified, it is assigned specific system permissions to carry out specific businesses. Compared with public chains, permissioned chains are more suitable for application scenarios that require supervision, cross-organization sharing, and multi-party business collaboration. In the context of the era when blockchain technology has been included in the new infrastructure category by the country, the license chain can better empower industry applications and accelerate the process of blockchain technology landing. However, if the system data and operations are stored in plain text and are open and transparen...

AI Technical Summary

Problems solved by technology

[0004] However, due to many factors such as data ownership, data leakage, and their own commercial interests, companies or organizations with a large amount of data are extremely cautious about opening their own internal data, especially core data, which leads to data privacy protection and data protection. The contradiction between efficient sharing is increasingly prominent

Obviously, the data security issue is still the difficulty and pain point restricting the wide application of permission chain technology. The reason lies in the imperfect data privacy protection and access control mechanism

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