A privacy protection traceability system and method for close contacts of infectious disease patients

Abstract

The invention discloses a privacy protection tracing system and method for close contacts of infectious disease patients. The system includes: a trusted center (TA), a server (CS), and a user (USER); it is assumed that there are n users USER in the system i . TA allocation and calculation system parameters: user's identity ID, user matching key, server key, communication key, Hash function, USER i The personal sensitive real-time location activity track is encrypted and generated by the user matching key and the communication key, and the generated report is uploaded to the CS. The CS is authenticated by the communication key, and then matches and integrates to construct a social activity network graph G composed of the ciphertext report. ; Finally, upload the patient's activity trajectory through encryption. After the CS locates the patient's vertex, it searches for all the current close contacts of the patient according to the graph G for subsequent inspection and diagnosis. The present invention can ensure that the privacy of users is not leaked when the contacts are traced, and at the same time supports dynamic update and multiple traces, with fast speed, accurate and efficient processing.

Description

technical field [0001] The invention belongs to the technical field of social networks and the technical field of user sensitive data privacy protection, relates to a contact tracing system and method for protecting user activity privacy in a social network, and particularly relates to an infectious disease contact required for user sensitive data privacy in an outsourcing environment system and method of traceability. Background technique [0002] Citizen privacy is largely not a design goal in existing contact tracing schemes, and user-generated location history is often used to calculate contact tracing information. But attackers can listen to shared real-time location information, analyze this data and use it for illegal operations. Therefore, how to protect the privacy of users' sensitive location information in social activities is an important topic. [0003] In contact tracing, all users upload their real-time location information. The user provides the current ti...

AI Technical Summary

Problems solved by technology

Furthermore, the whole process should ensure that the server cannot know the sensitive location information of the user, and system users cannot obtain any other valid information except whether they are close contacts

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