Query request processing method and device

Abstract

The embodiment of the invention provides a query request processing method, which comprises the following steps that: a query party determines q selection bits based on a target identifier of a target object, and is used for executing a volume transmission OT protocol to obtain q intermediate values and q selection keys, so that a query request is sent to a data party, wherein q intermediate values and n object identifiers including a target identifier are included; the data party executes an OT protocol based on the q intermediate values to obtain q pairs of keys, constructs a confusion circuit based on the n object identifiers and the correspondingly queried n pieces of data, replaces q pairs of input tags corresponding to the object identifiers in confusion circuit information with q pairs of tag ciphertexts obtained by encrypting the q pairs of keys, and sends the confusion circuit information to the query party; and the query party decrypts the tag ciphertext based on the q by using the q selection keys to obtain q selection input tags corresponding to the target object, and decrypts the confusion circuit based on the q selection input tags to obtain target data corresponding to the target object.

Description

technical field [0001] One or more embodiments of this specification relate to the technical field of data processing, and in particular, to a query request processing method and device. Background technique [0002] With the advent of the era of big data, the importance of protecting data privacy and security issues has become increasingly prominent. Typically, in data query scenarios, it is hoped that anonymous queries can be implemented, that is, when the query direction has multiple key-value pairs (key-value) data parties query the value (value) of a specified keyword (key), the query is required The party can only obtain the value of this key, but not the values ​​of other keys, and the data party cannot obtain this key. For example, when the payment platform, as the inquiring party, inquires the bank account balance of the authorized user from the bank, it is required that the payment platform can only know the account balance of the authorized user, but cannot obtai...

AI Technical Summary

Problems solved by technology

For example, when the payment platform, as the inquiring party, inquires the bank account balance of the authorized user from the bank, it is required that the payment platform can only know the account balance of the authorized user, but cannot obtain the account balances of other users, and the data party cannot know which one is inquiring. user

[0003] However, the current implementation of anonymous query is difficult to meet the increasing needs of practical applications

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