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A blockchain medical data management method and system based on distributed attribute signature

A medical data and blockchain technology, applied in the blockchain field, can solve problems such as the storage limitation of the blockchain system, and achieve the effect of being effective and deployable, easy to deploy, and resistant to collusion attacks.

Active Publication Date: 2021-06-01
INST OF INFORMATION ENG CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Combined with on-chain and off-chain collaborative storage methods, it solves the problem of storage limitations in existing blockchain systems

Method used

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  • A blockchain medical data management method and system based on distributed attribute signature
  • A blockchain medical data management method and system based on distributed attribute signature
  • A blockchain medical data management method and system based on distributed attribute signature

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Embodiment Construction

[0061] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below through specific embodiments and accompanying drawings.

[0062] figure 1 It is a schematic diagram of a blockchain medical data management method based on distributed attribute signatures in this embodiment, and the method includes the following steps:

[0063] S1. System initialization: Generate the global public parameters of the distributed attribute signature and select the hash function used in the system.

[0064] Specifically, the global public parameter GP and the hash function H are calculated by the following methods:

[0065] (1) Select a bilinear group G according to the system security parameter λ, where the generator of the bilinear group G is g, the order is N, and the global public parameter GP=(N, g).

[0066] (2) Select a hash function H so that the hash function H can map the user'...

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Abstract

The invention discloses a blockchain medical data management method and system based on distributed attribute signatures. The method includes the following steps: S1. Generate global parameters of distributed attribute signatures and select a hash function; S2. Each attribute authority produces a signature key and a verification key corresponding to each attribute; S3. The signature key set corresponding to the global identity and attribute set; S4. After the user generates the EHR data, the signature is stored in the off-chain database, and the address is signed and published on the blockchain as a transaction; S5. The user first verifies the on-chain The signature attribute of the address stored in the transaction, and then find the EHR data in the off-chain database through the address and verify the attributes of the data signer. The present invention realizes safe sharing of EHR data across different CDO systems while protecting the signer's identity information, and solves the problem of block chain storage capacity limitation by way of on-chain and off-chain collaborative storage.

Description

technical field [0001] The invention relates to a blockchain medical data management method and system based on distributed attribute signatures, belonging to the blockchain field. Background technique [0002] In recent years, blockchain technology has attracted the attention of academia and industry, and the storage and sharing of distributed resources has been widely used in many fields. Blockchain technology not only effectively solves the Byzantine problem and the double payment problem of digital currency, but also breaks the limitations of the traditional centralized system. The blockchain does not rely on a trusted third party, but builds trust between node networks in a completely decentralized manner through a distributed verification and consensus mechanism. [0003] Blockchain is considered as an innovative technical framework for establishing distributed and peer-to-peer trust relationships in many fields of business, science and engineering, and one typical ap...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G16H10/60G06F21/62G06F21/60
CPCG06F21/602G06F21/6245G06F2221/2107G16H10/60
Inventor 孙优章睿薛锐苏倩倩
Owner INST OF INFORMATION ENG CHINESE ACAD OF SCI
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