List query method, query device, server device and storage medium

Abstract

The present invention relates to a method for querying a list, an inquiring device, a server device and a storage medium. The method includes: the inquiring device encrypts personal information to be queried based on a first private key and a predetermined exchangeable encryption algorithm to obtain a first encryption desensitization processing to obtain the desensitization information; the server device queries the list based on the plaintext part of the desensitization information, and obtains a subset of the list; Encrypt to obtain the first encrypted subset, and encrypt the first encrypted information based on the second private key and the exchangeable encryption algorithm to obtain the second encrypted information; the inquiring device based on the first private key and the exchangeable encryption algorithm Encrypt each piece of data in the set to obtain a second encrypted subset, and determine whether the personal information exists in the list based on the second encrypted subset and the second encrypted information. The invention can improve the efficiency of list query.

Description

technical field [0001] The present invention relates to the technical field of information security, in particular to a method for querying a list, an inquiring party device, a server device and a storage medium. Background technique [0002] With the development of the mobile Internet, more and more personal privacy information is collected, transmitted, calculated, and exchanged to improve service quality. However, this also raises a large number of problems about personal privacy being leaked. For example, an institution provides an inquiry interface to another institution to inquire whether the queried person is in the list. Such a list is composed of a class of individual groups with the same characteristics, such as members and blacklists. The conventional query interface needs to provide the personal identification information PII (Personally Identifiable Information) of the person being queried. Taking the blacklist as an example, the personal identification informa...

AI Technical Summary

Problems solved by technology

[0003] At present, a variety of encryption algorithms can be used to solve the above problems, but the common problem of these algorithms is: since all the data sets involved in the calculation are generally encrypted and exchanged with each other to complete the query, it is usually necessary for both parties to exchange a large amount of data. The amount of data is large; and the existing encryption algorithm takes a long time to calculate, which leads to low query efficiency, is not suitable for ordinary business systems, and has high usage costs

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