User information service privacy protection method and system based on identification replacement

Abstract

The invention discloses a user information service privacy protection method and system based on identification replacement. The method comprises the following steps that: (1) a trusted intermediate server collects a service request issued by a client, a historical service request sequence and a corresponding false historical service request sequence; (2) the intermediate server constructs a false request to meet privacy constraint and / or cost balance constraint, wherein the privacy constraint comprises a content privacy constraint and a theme privacy constraint; (3) the false request is sent to a cloud server and an information service result is obtained; and (4) the information service result is returned as the information service result of the service request to the corresponding user. The system is arranged in a trusted intermediate server between an untrusted cloud server and a client, and comprises a service request acquisition module, a false request construction module, a service request communication module and a result analysis module.

Description

technical field [0001] The invention belongs to the technical field of the Internet, and more specifically relates to a method and system for protecting user information service privacy based on identification replacement. Background technique [0002] Information service is an activity that provides users with the information they need in various forms by means of modern information technology and network technology. It is the starting point and destination of information management activities, and an important field and content of information management research. With the rapid development of emerging network technologies such as cloud computing, network servers are becoming more and more untrustworthy, which has become the main source of user privacy leakage. With the continuous enhancement of people's privacy awareness, the user privacy problem has become the main obstacle restricting the further development of modern information services, and has become a hot and diffi...

AI Technical Summary

Problems solved by technology

[0006] In view of the above defects or improvement needs of the prior art, the present invention provides a user information service privacy protection method and system based on identification replacement, which takes the overall information service privacy as the research entry point and does not limit specific information services. The purpose is to construct a user privacy protection framework, protection model and implementation algorithm based on identity replacement for information services in an untrusted network environment, effectively breaking through the application limitations of existing technical methods in user information service privacy protection, that is, to be able to Under the premise of sacrificing the practicality of information services (including accuracy, efficiency, and availability), improve the security of user service privacy on the untrusted server side, thereby solving the technical problems of inaccuracy or reduced efficiency in existing technologies

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