Blockchain medical data management method based on distributed attribute signature and system

A medical data, distributed technology, applied in the field of blockchain, can solve the problems of blockchain system storage limitations, etc., to achieve the effect of effective deployment, easy deployment, and avoiding storage limitations

Active Publication Date: 2019-07-05
INST OF INFORMATION ENG CAS
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  • Abstract
  • Description
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  • 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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  • Blockchain medical data management method based on distributed attribute signature and system
  • Blockchain medical data management method based on distributed attribute signature and system
  • Blockchain medical data management method based on distributed attribute signature and system

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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 based on distributed attribute signature and a system. The method comprises the following steps of S1, generating a global parameterof the distributed attribute signature and selecting a Hash function; S2, producing a signature secret key and a verification secret key which correspond with each attribute by each attribute authority mechanism; S3, generating a signature secret key set which corresponds with the global identity identification and the attribute set of a user by the user; S4, after generating EHR data by the user, storing the signature in an off-chain database, performing address signature on the HER data, and issuing the address signature in the blockchain; and S5, firstly verifying the signature attribute of the address which is stored in an on-line transaction by the user, and finding the EHR in the off-chain database through the address and verifying the attribute of a data signature person. The blockchain medical data management method and the system have advantages of protecting identity information of the signature person, realizing EHR data safe sharing over different CDO systems, and settlinga problem of blockchain storage capacity limitation through an on-chain and off-chain coordinated storage mode.

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 Applications(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 CAS
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