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| 1 | Generative adversarial networks enhanced location privacy in 5G networks显示文摘5G networks,as the up-to-date communication platforms,are experiencing fast booming.Meanwhile,increasing volumes of sensitive data,especially location information,are being generated and shared using 5G networks for various purposes ceaselessly.Location and trajectory information in the published data has always been and will keep courting risks and attacks by malicious adversaries.Therefore,there are still privacy leakage threats by simply sharing the original data,especially data with location information,due to the short cover range of 5G signal tower.To better address these issues,we proposed a generative adversarial networks(GAN)enhanced location privacy protection model to cloak the location and even trajectory information.We use posterior sampling to generate a subset of data,which is proved complying with differential privacy requirements from the end device side.After that,a data augmentation algorithm modified from classic GAN is devised to generate a series of privacy-preserving full-sized synthetic data from the central server side.With the synthetic data generated from a real-world dataset,we demonstrate the superiority of the proposed model in terms of location privacy protection,data utility,and prediction accuracy. | Youyang QU Jingwen ZHANG Ruidong LI Xiaoning ZHANG Xuemeng ZHAI Shui YU | 2020 | Science China(Information Sciences)2020，63，12： | 1 |
| 2 | 固体火箭发动机多分力试验技术研究显示文摘This paper presents a calculation method, and composition of a five-component force test device, to resolve the requirement for solid rocket motor multi-component force test. It compares the difference between two classical algorithms, and summarizes the structure and practical usage of the solid rocket motor multi-component force using soft connection structure measurement. The decoupling method of test data is described, and a reasonable research method for solid rocket motor multi-component force is also given in this paper. | ZHU Ziwen QU Youyang HAN Chenglin | 2021 | Aerospace China2021，22，4： | 0 |
| 3 | Improving Data Utility Through Game Theory in Personalized Differential Privacy显示文摘Due to dramatically increasing information published in social networks,privacy issues have given rise to public concerns.Although the presence of differential privacy provides privacy protection with theoretical foundations,the trade-off between privacy and data utility still demands further improvement.However,most existing studies do not consider the quantitative impact of the adversary when measuring data utility.In this paper,we firstly propose a personalized differential privacy method based on social distance.Then,we analyze the maximum data utility when users and adversaries are blind to the strategy sets of each other.We formalize all the payoff functions in the differential privacy sense,which is followed by the establishment of a static Bayesian game.The trade-off is calculated by deriving the Bayesian Nash equilibrium with a modified reinforcement learning algorithm.The proposed method achieves fast convergence by reducing the cardinality from n to 2.In addition,the in-place trade-off can maximize the user's data utility if the action sets of the user and the adversary are public while the strategy sets are unrevealed.Our extensive experiments on the real-world dataset prove the proposed model is effective and feasible. | Lei Cui Youyang Qu Mohammad Reza Nosouhi Shui Yu Jian-Wei Niu Gang Xie | 2019 | Journal of Computer Science & Technology2019，34，2： | 0 |
| 4 | Evolutionary privacy-preserving learning strategies for edge-based IoT data sharing schemes显示文摘The fast proliferation of edge devices for the Internet of Things(IoT)has led to massive volumes of data explosion.The generated data is collected and shared using edge-based IoT structures at a considerably high frequency.Thus,the data-sharing privacy exposure issue is increasingly intimidating when IoT devices make malicious requests for filching sensitive information from a cloud storage system through edge nodes.To address the identified issue,we present evolutionary privacy preservation learning strategies for an edge computing-based IoT data sharing scheme.In particular,we introduce evolutionary game theory and construct a payoff matrix to symbolize intercommunication between IoT devices and edge nodes,where IoT devices and edge nodes are two parties of the game.IoT devices may make malicious requests to achieve their goals of stealing privacy.Accordingly,edge nodes should deny malicious IoT device requests to prevent IoT data from being disclosed.They dynamically adjust their own strategies according to the opponent's strategy and finally maximize the payoffs.Built upon a developed application framework to illustrate the concrete data sharing architecture,a novel algorithm is proposed that can derive the optimal evolutionary learning strategy.Furthermore,we numerically simulate evolutionarily stable strategies,and the final results experimentally verify the correctness of the IoT data sharing privacy preservation scheme.Therefore,the proposed model can effectively defeat malicious invasion and protect sensitive information from leaking when IoT data is shared. | Yizhou Shen Shigen Shen Qi Li Haiping Zhou Zongda Wu Youyang Qu | 2023 | Digital Communications and Networks2023，9，4： | 0 |
| 5 | Towards Privacy-Aware and Trustworthy Data Sharing Using Blockchain for Edge Intelligence显示文摘The popularization of intelligent healthcare devices and big data analytics significantly boosts the development of Smart Healthcare Networks(SHNs).To enhance the precision of diagnosis,different participants in SHNs share health data that contain sensitive information.Therefore,the data exchange process raises privacy concerns,especially when the integration of health data from multiple sources(linkage attack)results in further leakage.Linkage attack is a type of dominant attack in the privacy domain,which can leverage various data sources for private data mining.Furthermore,adversaries launch poisoning attacks to falsify the health data,which leads to misdiagnosing or even physical damage.To protect private health data,we propose a personalized differential privacy model based on the trust levels among users.The trust is evaluated by a defined community density,while the corresponding privacy protection level is mapped to controllable randomized noise constrained by differential privacy.To avoid linkage attacks in personalized differential privacy,we design a noise correlation decoupling mechanism using a Markov stochastic process.In addition,we build the community model on a blockchain,which can mitigate the risk of poisoning attacks during differentially private data transmission over SHNs.Extensive experiments and analysis on real-world datasets have testified the proposed model,and achieved better performance compared with existing research from perspectives of privacy protection and effectiveness. | Youyang Qu Lichuan Ma Wenjie Ye Xuemeng Zhai Shui Yu Yunfeng Li David Smith | 2023 | Big Data Mining and Analytics2023，6，4： | 0 |
| 6 | Expression Preserved Face Privacy Protection Based on Multi-mode Discriminant Analysis显示文摘Most visual privacy protection methods only hide the identity information of the face images,but the expression,behavior and some other information,which are of great significant in the live broadcast and other scenarios,are also destroyed by the privacy protection process.To this end,this paper introduces a method to remove the identity information while preserving the expression information by performing multi-mode discriminant analysis on the images normalized with AAM algorithm.The face images are decomposed into mutually orthogonal subspaces corresponding to face attributes such as gender,race and expression,each of which owns related characteristic parameters.Then,the expression parameter is preserves to keep the facial expression information while others parameters,including gender and race,are modified to protect face privacy.The experiments show that this method yields well performance on both data utility and privacy protection. | Xiang Wang Chen Xiong Qingqi Pei Youyang Qu | 2018 | Computers, Materials & Continua2018，，10： | 0 |
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