Parallel partial homomorphic encryption method and system based on confusion mode projection

Abstract

The invention relates to a parallel partial homomorphic encryption method and system based on confusion mode projection, which can perform finite times of addition and multiplication homomorphic operation on data encrypted by a confusion mode projection encryption method. The system comprises a parallel data synthesis module for combining original data into a 'large number'; a parameter generationmodule which is used for automatically generating a public parameter and a secret parameter according to the user key; an encryption module which is used for encrypting the 'large number' by the client according to the public parameters; a blind calculation module which is used for performing limited times of addition, subtraction, multiplication and other operations on all modular projections bythe server according to the common parameters, which is equivalent to performing the operation on the original data; a decryption module which is used for taking out a correct modular projection calculation result by the client according to the secret parameters and decrypting the correct modular projection calculation result; and a parallel data decomposition module which is used for decomposingthe calculation result of the 'large number' original data by the client to obtain the calculation result of the original data. According to the scheme provided by the invention, the calculation efficiency can be greatly improved, and the security is improved to a certain extent.

Description

technical field [0001] The invention is a parallel partial homomorphic encryption method and system based on confusion mode projection, and belongs to the field of homomorphic encryption. Background technique [0002] At present, more and more storage and computing are completed in the cloud, and the storage and processing of massive visual media data is also outsourced to the cloud platform. However, under the cloud platform, the privacy of user data may be leaked to the public or unauthorized third parties. In order to solve the security problems of cloud computing, relevant experts and scholars are also constantly exploring. [0003] Homomorphic encryption technology is an important technology to solve the security problem of cloud computing. Homomorphic encryption provides a function of processing encrypted data. There are three types of homomorphic encryption schemes: semi-homomorphic, partially homomorphic, and fully homomorphic encryption schemes. Semi-homomorphic e...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is: to overcome the deficiencies of the prior art and to avoid the problem of low computational efficiency in fully homomorphic encryption. Part of the homomorphic encryption system of the confusion mode projection, the user does not need to implement the details of the encryption scheme, and can perform operations such as encryption, blind calculation, and decryption on the data

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