Unlock instant, AI-driven research and patent intelligence for your innovation.

Health data aggregation method based on differential privacy

A technology of health data and aggregation methods, applied in the field of cryptography and information security, which can solve problems such as damage to the interests of policyholders

Active Publication Date: 2017-01-25
GUILIN UNIV OF ELECTRONIC TECH
View PDF2 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, if an insurance company knows the health data of an insured, it will damage the interests of the insured.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Health data aggregation method based on differential privacy
  • Health data aggregation method based on differential privacy
  • Health data aggregation method based on differential privacy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] The present invention will be described in detail below using an implementation case.

[0013] Definition: P i Indicates the ith patient in a specific area, i=1,2,3...,n; ID i Indicates the identity information of the i-th patient; x i Indicates the private key of the ith patient; y i Represents the public key of the i-th patient; H(x) represents a secure hash function, H:{0,1} * →G 1 ;t represents the moment of aggregation; m i Indicates the health data of the i-th patient at time t; Δ means to generate an m i interval; B(w n ,1 / 2) means an unbiased binomial distribution.

[0014] 1. Data preparation stage

[0015] 1. Data preparation required by the local health data center (LHC)

[0016] ① Select two secret random numbers ε, δ according to privacy and practical requirements; and calculate w=64Δ 2 log(2 / δ) / ε 2 , where Δ is m i interval.

[0017] ②Choose three safe prime numbers q, q 1 ,q 2 ; and calculate N=q 1 q 2 .

[0018] ③From the N-order cycl...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a health data aggregation method based on differential privacy. The health data aggregation method based on differential privacy comprises the following steps: (1) selecting two secret random numbers by using a health data center according to privacy and practical requirements; (2) forming {IDi, yi} by using a public key and identity information IDi of an ith patient, and transmitting {IDi, yi} to LHC; (3) generating a health datum mi E[0, 1, ..., delta] of the ith patient at a time t, selecting vi-B(wn, 1 / 2) and a random number ri', and calculating an equation as shown in the specification; (4) generating a signature as shown in the specification of the ith patient according to H(x), and transmitting {IDi, CTi, sigma i} to LHC; (5) after LHC receives {IDi, CTi, sigma i}, verifying whether the following equation is true or not: e (sigma i, g2)= e(H(t ll CTi), yi); and (6) if the equation is true, calculating an equation as shown in the specification by LHC, and outputting the result of an equation as shown in the specification. By the health data aggregation method, aggregation of individual privacy data can be realized without depending on a third party, and leakage is not caused.

Description

technical field [0001] The invention belongs to the technical field of cryptography and information security, and in particular relates to a health data aggregation method based on differential privacy. Background technique [0002] Personal health data involves personal privacy, which cannot be made public. Once the private data is leaked, others may use this data to do things that endanger personal interests. For example, if an insurance company knows the health data of an insured, it will damage the interests of the insured. However, the average level of many personal health data is very useful for insurance companies. For example, insurance companies can set premium prices based on this average data without harming personal interests. Therefore, how to aggregate health data without revealing personal privacy has become a very important and must be solved problem. In addition, third-party organizations on the Internet are generally difficult to trust, as evidenced by th...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/00H04L9/06H04L9/08H04L9/30
CPCH04L9/003H04L9/0631H04L9/0819H04L9/0869H04L9/3073
Inventor 刘忆宁宋精诚刘高
Owner GUILIN UNIV OF ELECTRONIC TECH