An integrity audit method that supports traceability of electronic medical record data on the cloud
An electronic medical record and integrity technology, applied in the fields of electronic digital data processing, patient-specific data, digital data protection, etc., can solve problems such as inability to provide tracking data, low efficiency, etc., to eliminate malicious challenges and solve low efficiency. , the effect of reducing computational and communication overhead
Active Publication Date: 2020-07-31
NANJING UNIV OF SCI & TECH
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Problems solved by technology
However, in several existing multi-copy schemes, the data structures designed to support data dynamics are inefficient, and they cannot provide the function of tracking data
Method used
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[0018] combine figure 2 As shown, the integrity audit method that supports the traceability of electronic medical record data on the cloud includes the following steps:
[0019] Step 1. Key generation: The data owner selects public parameters for the system and generates public and private keys, which specifically includes the following steps:
[0020] Step 1-1. Select the multiplicative cyclic group G whose order is q 1 , G 2 , G T , where q is a randomly selected large prime number; select bilinear mapping e:G 1 ×G 2 →G T ; Choose a one-way hash function H 1 :{0,1} * →G 1 ;
[0021] Step 1-2. The data owner generates the public key pk and private key sk, and selects s random values {r 1 ,r 2 ,...,r s}.
[0022] Step 1-2-1 Take a secure signature algorithm Sig() and a corresponding pair of signature keys (spk, ssk);
[0023] Step 1-2-2 Randomly select the secret value x∈Z q , calculate y=g x , where g is G 2 A generator of Z , Z q ={1,2,...,q-1};
[00...
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The invention provides an integrity auditing method for supporting traceability of electronic medical record data on cloud. The integrity auditing method includes the steps: (1) key generation; (2) copy generation; (3) tag generation; (4) authorization generation; (5) challenge generation; (6) evidence generation; (7) evidence verification. By a multi-copy storage mode, privacy protection is provided for the electronic medical record data, and the durability and the disaster resistance of the electronic medical record data are enhanced. Besides, by designing a novel data structure, namely, a DMHT (dynamic mapping hash table), based on effective support of the dynamic state of the data, a data traceable function is provided for a system. In addition, under the condition of ensuring system safety, computation and communication overhead in the integrity design process is reduced, and the efficiency of the method is effectively improved.
Description
technical field [0001] The invention mainly relates to the fields of cloud storage and electronic medical care, and in particular relates to an integrity audit method supporting traceability of electronic medical record data on the cloud. Background technique [0002] The electronic medical record (Electronic Medical Record) completely and continuously records the changes in the patient's condition and the course of diagnosis and treatment. It can not only provide accurate and timely information for disease treatment and first aid, but also provide important information for medical research. Compared with traditional devices with limited performance, the emergence of cloud storage can well meet the increasing data volume, frequent data update and data sharing requirements of medical records. Therefore, it is of great significance to establish electronic medical records on the cloud. When patients upload their data to the cloud, doctors can better judge the patient's condit...
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IPC IPC(8): G06F21/62G16H10/60
CPCG06F21/6245
Inventor 付安民周磊俞研王永利陈珍珠
Owner NANJING UNIV OF SCI & TECH