Medical information attribute encryption access control method based on block chain

Abstract

The invention discloses a medical information attribute encryption access control method based on a block chain. The method comprises the following steps that a patient performs attribute encryption based on a ciphertext strategy on personal medical data and stores the personal medical data to the block chain; a visitor provides corresponding attributes for a plurality of attribute authorization mechanisms through a smart contract and waits for verification, and if the verification succeeds, the visitor is also granted an attribute token through the smart contract; when the patient has enoughattribute tokens, data information access is requested to the patient through the smart contract; and if the patient judges that the attribute set of the visitor meets the formulated access strategy,the visitor has permission to access the medical data information of the patient. According to the method, access control of a plurality of attribute authorization mechanisms and traceability responsibility asking of the attribute authorization mechanisms can be realized, and a patient can autonomously control medical data access.

Description

technical field [0001] The invention relates to the technical field of block chains, in particular to a block chain-based encryption access control method for medical information attributes. Background technique [0002] With the rapid development of the economy and the continuous improvement of social informatization, data is showing explosive growth, and the value of data has increased significantly. Massive data is increasingly being created and urgently needs safe and reliable sharing, especially in the medical industry. Important and sensitive information such as patient health data, diagnosis and treatment, and electronic insurance policies are stored in the institution. Medical privacy information is related to the vital interests of patients. In reality, patients' private information is leaked from time to time, and once these sensitive information is leaked, it will bring various adverse effects to the lives of patients. According to statistics from the Industrial ...

AI Technical Summary

Problems solved by technology

However, there are still the following problems in the combination of attribute encryption access control technology based on ciphertext policy and blockchain technology: (1) It is impossible to trace the authorization process of multiple attribute authorization agencies to accountability, and the credibility of attribute authorization needs to be further improved. Improvement; (2) It cannot support the access of patient self-control data and the access control of multiple attribute authorization institutions at the same time

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