Quasi-fully homomorphic ciphertext data operation method and system

A data operation and fully homomorphic technology, which is applied in the field of ciphertext database and network data privacy protection, can solve the problems of unspecified data storage form, will cause, large computing overhead, etc., and achieve simple structure and high data operation efficiency , deploy simple effects

Inactive Publication Date: 2018-01-16
BEIJING ELECTRONICS SCI & TECH INST
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

But no specific data storage form is given
Moreover, the invention is based on the client / server model, and the client performs frequent data encryption and decryption, which will cause large computing overhead

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  • Quasi-fully homomorphic ciphertext data operation method and system
  • Quasi-fully homomorphic ciphertext data operation method and system
  • Quasi-fully homomorphic ciphertext data operation method and system

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Embodiment Construction

[0022] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments, but the scope of the present invention is not limited in any way.

[0023] The invention adopts a quasi-fully homomorphic ciphertext storage and operation scheme, builds a network entity-ciphertext server without changing the database deployment strategy, and solves the problem of ciphertext data operation and retrieval under the hybrid cloud. Real-time processing of ciphertext can be realized, and arithmetic operations such as addition, subtraction, multiplication, division, summation, and averaging are supported, as well as fuzzy retrieval and sorting of data within a certain range.

[0024] The present invention uses homomorphic encryption technology to solve problems such as cloud data security storage and operation, taking the application mode of quasi-fully homomorphic encryption in a hybrid cloud platform application scenario as a...

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Abstract

The present invention discloses a quasi-fully homomorphic ciphertext data operation method and system and belongs to the ciphertext database and network data privacy protection technical field. The fully homomorphic cipher operation-based hybrid cloud platform architecture is provided, existing database configurations are not needed to be drastically modified, and therefore, a construction mode issimple; a ciphertext server is defined to support homomorphic calculation, query interception rewriting, data encryption and decryption, key management and other functions, is deployed at the privatecloud platform of a local data center and can establish a connection between the local data center and a third-party public cloud platform; a classified field extension mode is adopted, field extension is performed on numerical value data and character type data; by means of mode innovation, quasi-fully homomorphic ciphertext conventional arithmetic calculation is performed on the numerical valuedata through a functional demand-based cipher service strategy; query/operation is directly performed on ciphertext data; and therefore, the processing efficiency of the data and the security of thestorage and retrieval of the data can be improved.

Description

technical field [0001] The invention belongs to the technical field of ciphertext database and network data privacy protection, and relates to a quasi-fully homomorphic operation method for numerical data and an architecture design in a hybrid cloud scene. Background technique [0002] With the development of cloud computing, cloud computing services based on massive data have gradually become the focus of many enterprises. Due to the consideration of cost, resource sharing and business expansion, many industries have begun to try to transform from the original IT system to the intelligent cloud platform. upgrade. It is very convenient to use the cloud computing processing mode to carry out business, but the security problems of cloud applications are becoming more and more prominent, such as: third-party service providers are not trustworthy, administrators snoop and steal data, causing important information leakage, cloud data leakage, etc. If the private key of the decry...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/00H04L29/08
Inventor 杨亚涛杨薇李子臣刘博雅梁斓张峰娟孙亚飞
Owner BEIJING ELECTRONICS SCI & TECH INST
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