Electronic medical record fine-grained access control and ciphertext searchable method based on block chain
An access control and electronic medical record technology, applied in the field of information security, can solve problems such as limited keyword search ability, loss of control rights, privacy leakage, etc., and achieve the effects of saving search costs, improving efficiency, and solving limited storage space
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[0026] In order to make the purpose, technical solutions and advantages of the present application more clearly understood, the present application will be described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application.
[0027] In one embodiment, as figure 1 As shown, a blockchain-based method for fine-grained access control and ciphertext searchability of electronic medical records includes the following steps:
[0028] Step 1, the patient divides the medical data into a public part and a private part, and constructs two different access structure trees to control the public and private parts of the medical data respectively;
[0029] Further, in one of the embodiments, the patient described in step 1 performs access control on two parts of his medical data for the doctor with differ...
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