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Frequentness measuring method and system for security and privacy protection facing cloud data issuing

A technology for data release and measurement methods, which is applied in the research field of privacy protection to achieve the effect of convenient protection of privacy

Active Publication Date: 2017-03-22
ZHEJIANG GONGSHANG UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of these solutions are based on theory, and it is necessary to continue to study efficient practical solutions

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  • Frequentness measuring method and system for security and privacy protection facing cloud data issuing
  • Frequentness measuring method and system for security and privacy protection facing cloud data issuing
  • Frequentness measuring method and system for security and privacy protection facing cloud data issuing

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Embodiment Construction

[0026] Before introducing the specific implementation method, first introduce some basic knowledge of fully homomorphic encryption. The homomorphic encryption scheme includes four probabilistic time polynomial algorithms HE={KeyGen, Encrypt, Decrypt, Evaluate}. The functions and processes of these four algorithms are as follows, and λ is a security parameter:

[0027] KeyGen is the key algorithm for generating schemes. Input the security parameter λ, and output the public key pk, private key sk and public evaluation key evk, evk is the public key information required to operate the Boolean circuit. (pk,evk,sk)←HE.KeyGen(1 λ ).

[0028] Encrypt is a ciphertext generation algorithm. Input the public key pk and single-bit information m∈{0,1}, and output a ciphertext c. c←HE.Enc pk (m).

[0029] Decrypt is to decrypt the ciphertext. Input the private key sk and a ciphertext c, and output the information m * ∈{0,1}. m * ←HE.Dec sk (c).

[0030] Evaluate is used to ensur...

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Abstract

The invention discloses a frequentness measuring method and system for security and privacy protection facing cloud data issuing. A database owner generates a secret key pair, encryption outsourcing processing is carried out on the database, encryption operation is carried out on complement of a frequentness threshold negative -k, the encrypted complement is uploaded to a cloud server, and a private key sk is authorized to a proxy server; a client applies to inquire the frequentness of a record R; the proxy server obtains permission from the database owner and assists the database owner in dealing with a transaction. The cloud server is used for storing a ciphertext database and carrying out a homomorphic operation on the ciphertext. According to the method and system disclosed by the invention, with the full-homomorphic encryption technology, the frequentness ciphertext in a data recording manner is obtained in a cloud environment and whether the frequentness of the record meets a privacy protection requirement is determined; and leaking of a recorded content inquired by a client as well as sensitive recorded content with the frequentness lower than a threshold in the database can be prevented during the whole process. Therefore, secure storage of data can be realized; and frequentness measurement for privacy protection can be carried out by the cloud conveniently.

Description

technical field [0001] The present invention relates to the research field related to privacy protection, in particular to a frequency measurement method and system for cloud data release protection security and privacy. Background technique [0002] In the era of information sharing, privacy protection and information security have become an important research field in IT circles. Information security requires preventing unauthorized disclosure of data, while privacy protection aims to prevent disclosed data from being used to infer sensitive information about individuals. [0003] With the advent of the era of big data, more and more people use cloud computing technology to store data and perform computing tasks in the cloud, and privacy protection faces many new challenges. There is a danger of privacy leakage in the cloud data storage process. In addition, the privacy protection process itself may also be attacked, which undoubtedly increases the risk of privacy leakage...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/08H04L29/06H04L9/08H04L9/00
Inventor 刘君强陈芳慧李挺
Owner ZHEJIANG GONGSHANG UNIVERSITY
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