A distributed classification method and system for ciphertext data in a cloud environment

Abstract

The invention relates to the technical field of data encryption transmission and classification, in particular to a distributed classification method and system for ciphertext data in a cloud environment: D The data itself is encrypted to get [ D ], and upload it to the cloud server; the user sends a data classification request to the data owner, and after the data owner authenticates the user's identity information, it sends the data classification authorization permission to the user; after the user receives the authorization, it treats the classified data d The encryption process is [ d ],followed by[ d ] sent to the cloud server; the cloud server cooperates with the outsourced computing server to encrypt the data to be classified[ d ] and data uploaded by the data owner[ D ] to perform distributed classification calculation to obtain encrypted data to be classified [ d ] of the classification result; the cloud server will encrypt the data to be classified [ d ] The classification result is sent to the user, and the user decrypts the result. The invention can classify data on the basis of data encryption, thereby improving security.

Description

technical field [0001] The invention relates to the technical field of data encryption transmission and classification, in particular to a distributed classification method and system for ciphertext data in a cloud environment. Background technique [0002] At this stage, more and more users and enterprises choose to outsource their data storage and business computing to cloud servers, and let them store and compute on their behalf, so as to save data storage expenses and system maintenance expenses. However, although the efficiency of cloud storage has been greatly improved, security incidents often occur due to security risks caused by cloud service providers. Therefore, people often choose to encrypt data stored in the cloud. However, the encrypted data loses its original characteristics, and it is often difficult when people want to classify the data. Therefore, how to effectively classify and calculate ciphertext data under the premise of ensuring data privacy require...

AI Technical Summary

Problems solved by technology

Patent CN110190946A is a multi-party organization using the central node computing center to carry out a safe multi-party data classification scheme. The data actually stays locally and has not been uploaded to the cloud environment, which makes the data samples to be tested limited and restricts the actual application;

[0005] 2. When the patent CN110190946A classifies ciphertext data, it uses the intermediary entity "computing center", but does not perform message authentication between it and each entity, which lacks credibility and may cause data privacy to be leaked;

[0006] 3. When the patent CN110190946A performs data classification and calculation, the calculation is directly performed inside the entity. Due to the limited computing power of the entity itself, the calculation of a large number of ciphertexts has the problem of low efficiency and lack of practicability

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