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Attribute-based searchable encrypted block chain medical data sharing method

A medical data and block chain technology, applied in the field of information security, can solve the problems of large fuel and electricity consumption

Pending Publication Date: 2021-05-07
XIDIAN UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Tsai proposed a blockchain-based medical data sharing scheme, which can verify the integrity of medical data, and the system model of this scheme is similar to that of the scheme proposed by Wang, but both schemes are due to the use of ABE and public blockchains implement search functions, which consume a lot of fuel and electricity

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  • Attribute-based searchable encrypted block chain medical data sharing method
  • Attribute-based searchable encrypted block chain medical data sharing method
  • Attribute-based searchable encrypted block chain medical data sharing method

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Embodiment Construction

[0040] refer to figure 1 , the implementation steps of the present invention are as follows:

[0041] Step 1, system initialization.

[0042] (1.1) The certification authority TA generates a bilinear map e:G 1 ×G 1 →G 2 , and choose a symmetric cryptographic algorithm SE=(SE.Enc,SE.Dec), two hash functions H':{0,1} * →G 1 , where e is a bilinear map, G 1 is the additive group, G 2 is a multiplicative group, SE.Enc is a symmetric encryption algorithm, SE.Dec is a symmetric decryption algorithm, is the group of integers modulo p;

[0043] (1.2) The certification authority TA selects two random numbers α and β, and calculates the public key PK=(g β ,e(g,g) α ) and system master key MK=(β,g α ), and expose the global parameter GP=(G 1 ,G 2 , e, g, p, H, H') and the public key PK, while keeping the system master key MK secret, where α, β belong to the integer group g is the additive group G 1 The generator of , p is the additive group G 1 and the multiplicative ...

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Abstract

The invention discloses a block chain medical data sharing method with a searchable and encrypted attribute base, and mainly solves the problem that secure sharing cannot be realized in the prior art. The method comprises the following implementation steps: 1) performing system initialization by a certification authority TA; 2) the authentication authority TA generates a key SKU of the user U according to the attribute of the user; 3) the user U encrypts the medical file, uploads the encrypted medical file to an interstellar file system IPFS, encrypts a file encryption key and a file storage address, and uploads the encrypted file encryption key and file storage address to a block chain; 4) the user U generates a search trap door Tq according to the own key SKU and the keyword q, and calls a search algorithm to obtain a file encryption key and a ciphertext of a file storage address; and 5) the user U decrypts to obtain the medical file. The method has the advantages of high efficiency, tampering prevention, access control, privacy protection, no single-point fault and higher practicability, and can be used for secure sharing of data in cloud environments such as education, service and medical treatment.

Description

technical field [0001] The invention belongs to the technical field of information security, and in particular relates to a method for sharing medical data, which can be used for safe sharing of medical data in a cloud environment. Background technique [0002] Recently, with the widespread application of cloud storage, an increasing number of medical institutions store medical data in the cloud. This can improve the service efficiency of doctors and reduce the storage cost of medical data. However, different medical institutions often have different management methods for medical data, making it difficult to share medical data among different medical institutions. Personal medical records usually contain private information and sensitive data such as health care and medication, and are easy to be misused without knowing it. In order to protect the privacy of medical data, medical data is usually encrypted and uploaded to the third-party cloud server of the medical institu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F21/62G06F21/60G06F21/64
CPCG06F21/6227G06F21/602G06F21/64
Inventor 刘景伟张高建武明利孙蓉裴庆祺
Owner XIDIAN UNIV
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