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A method and system for protecting user privacy information against vertical attacks

A user privacy and information protection technology, applied in the field of privacy protection, can solve the problems of privacy data leakage and abuse, achieve the effect of improving usability, solving the problem of vertical attack, and improving the degree of privacy protection

Active Publication Date: 2022-05-24
INST OF INFORMATION ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] But what is worrying is that various forms of privacy data leakage and abuse occur frequently, showing a trend of increasing year by year

Method used

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  • A method and system for protecting user privacy information against vertical attacks
  • A method and system for protecting user privacy information against vertical attacks
  • A method and system for protecting user privacy information against vertical attacks

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Embodiment Construction

[0029] In order to make the objects, solutions and advantages of the present invention clearer, the present invention will be described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

[0030] The invention discloses a user privacy information protection method and system that can resist vertical attacks. The client first maps a certain privacy data for frequency statistical analysis through a Bloom filter, and obtains a specific 0 / 1 bit string of the data. , and then randomly perturb the bit string twice according to a certain probability through the random response mechanism to obtain the noise-added data that satisfies the definition of local differential privacy; use a randomly selected user U for the noise-added data. i the public key PK of i Encrypt, send encrypted data to U i...

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Abstract

The present invention provides a method and system for protecting user privacy information against vertical attacks, which is suitable for a network system composed of an information collection terminal and several information providing terminals. , after denoising, the information provided by each information provider is obtained. The present invention realizes that when the overall data frequency information is counted, the collector cannot directly obtain the user's private information through the data report sent by a single information provider, and cannot obtain the user's private information by repeatedly collecting the data report of a certain user by using a vertical attack method User privacy; after all data reports must be aggregated, user privacy information must be counted through methods such as denoising and regression analysis, so as to take into account privacy protection and data availability, and improve privacy protection while increasing data availability.

Description

technical field [0001] The invention relates to the field of privacy protection, in particular to a method and system for protecting user privacy information that can resist vertical attacks. Background technique [0002] Local differential privacy protection technology is a data collection framework based on centralized differential privacy protection technology, which is different from the assumption of centralized differential privacy for trusted data collectors, which is aimed at untrustworthy data collectors. The local differential privacy protection technology fully considers the possibility of data collectors stealing or leaking user privacy during the data collection process. In local differential privacy, each user first performs privacy processing on the data, and then sends the processed data to the data collector, who collects statistics on the collected data to obtain effective analysis results. Local differential privacy protects individual private information...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F21/60G06F21/62
CPCG06F21/602G06F21/6245
Inventor 李敏彭佳张佳程高能
Owner INST OF INFORMATION ENG CHINESE ACAD OF SCI
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