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The Role of Consumer privacy Concerns in Shaping Platform Strategy for Online Markets

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Journal of the Operations Research Society of China 2024年第2期12卷 363-386页

作者： Jin-Kun Yang Yong-Rui Duan Jia-Zhen Huo School Economics and Management Tongji UniversityShanghai 200092China

We investigate the effects of consumer privacy concerns on the pricing and personal data collection strategy of an online *** online platform derives revenues from disclosing consumer information to *** compete for the information in order to enable them to price discriminate and thus derive revenues from consumer purchases.A novel aspect of our research is that we allow the online platform to sell only a subset of consumer *** develop analytical models where consumers can/cannot protect their *** analysis yields three main ***,in the monopoly case,we find that when the consumer privacy disclosure aversion cost is relatively low,it is optimal for the platform to sell all consumer information to the ***,in the duopoly case,we illustrate that when the consumer privacy disclosure aversion cost is relatively low,the platform will sell all consumer information to only one firm;when the cost is moderate,the platform will choose to sell the information of only some consumers and to only one firm;when the cost is relatively high,the platform will select only some of the consumers and sell their information to both ***,it will be better for the platform to provide the information protection service for free when the privacy cost is low.

关键词： Price discrimination user privacy Consumer information Two-sided market privacy disclosure aversion cost

PALES: Optimizing Secure Data Deletion in SSDs via Page Group and Reprogram Speedup

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Chinese Journal of Electronics 2022年第1期31卷 40-51页

作者： NIE Shiqiang WU Weiguo ZHANG Chi ZHANG Chen Department of Computer Science and Technology Xi'an Jiaotong University

As solid-state drives(SSD) have been widely adopted, secure data deletion becomes an essential component for ensuring user privacy, preventing sensitive data leakage. Due to the erase-before-write property,erasure operation and scrub operation substituting for overwriting technologies are proposed to meet the requirements. However, both methods bring the severe page-copying issue, declining read/write performance, and shortening the lifetime of SSD. In this paper, this issue is alleviated by reserving pages at the page allocation stage to mitigate program disturbance and increasing program step voltage during reprogramming operation to reduce the reprogram latency. The proposed scheme is evaluated by a series of experiments; the results show that the proposed scheme could achieve significant deletion time reduction and alleviate page-copying overhead.

关键词： data privacy SSD user privacy PALES security of data storage management page group page allocation stage erase-before-write property secure data deletion solid-state drives erasure operation flash memories sensitive data leakage page-copying overhead reprogram speedup program step voltage reprogramming operation

Enhancing Security by Using GIFT and ECC Encryption Method in Multi-Tenant Datacenters

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Computers, Materials & Continua 2023年第5期75卷 3849-3865页

作者： Jin Wang Ying Liu Shuying Rao R.Simon Sherratt Jinbin Hu School of Computer&Communication Engineering Changsha University of Science&TechnologyChangsha410004China School of Systems Engineering The University of ReadingRG66AYUK

Data security and user privacy have become crucial elements in multi-tenant data *** traffic types in the multi-tenant data center in the cloud environment have their characteristics and *** the data center network(DCN),short and long flows are sensitive to low latency and high throughput,*** traditional security processing approaches,however,neglect these characteristics and *** paper proposes a fine-grained security enhancement mechanism(SEM)to solve the problem of heterogeneous traffic and reduce the traffic completion time(FCT)of short flows while ensuring the security of multi-tenant traffic ***,for short flows in DCN,the lightweight GIFT encryption method is *** Intra-DCN long flows and Inter-DCN traffic,the asymmetric elliptic curve encryption algorithm(ECC)is *** NS-3 simulation results demonstrate that SEM dramatically reduces the FCT of short flows by 70%compared to several conventional encryption techniques,effectively enhancing the security and anti-attack of traffic transmission between DCNs in cloud computing ***,SEM performs better than other encryption methods under high load and in largescale cloud environments.

关键词： Multi-tenant datacenter user privacy transmission security GIFT ECC

Using IM-Visor to stop untrusted IME apps from stealing sensitive keystrokes

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Cybersecurity 2018年第1期1卷 143-159页

作者： Chen Tian Yazhe Wang Peng Liu Qihui Zhou Chengyi Zhang State Key Laboratory of Information Security Institute of Information EngineeringChinese Academy of SciencesBeijing 100093People’s Republic of China School of Cyber Security University of Chinese Academy of SciencesBeijingPeople’s Republic of China College of Information Sciences and Technology Pennsylvania State UniversityUniversity Park 16802PAUSA

Third-party IME(Input Method Editor)apps are often the preference means of interaction for Android users’*** this paper,we first discuss the insecurity of IME apps,including the Potentially Harmful Apps(PHAs)and malicious IME apps,which may leak users’sensitive *** current defense system,such as I-BOX,is vulnerable to the prefix substitution attack and the colluding attack due to the post-IME *** provide a deeper understanding that all the designs with the post-IME nature are subject to the prefix-substitution and colluding *** remedy the above post-IME system’s flaws,we propose a new idea,pre-IME,which guarantees that“Is this touch event a sensitive keystroke?”analysis will always access user touch events prior to the execution of any IME app *** design an innovative TrustZone-based framework named IM-Visor which has the pre-IME ***,IM-Visor creates the isolation environment named STIE as soon as a user intends to type on a soft keyboard,then the STIE intercepts,Android event sub translates and analyzes the user’s touch *** the input is sensitive,the translation of keystrokes will be delivered to user apps through a trusted ***,IM-Visor replays non-sensitive keystroke touch events for IME apps or replays non-keystroke touch events for other apps.A prototype of IM-Visor has been implemented and tested with several most popular *** experimental results show that IM-Visor has small runtime overheads.

关键词： TrustZone Android app security user privacy