【摘要】：隨著無(wú)線通訊技術(shù)和定位技術(shù)的不斷發(fā)展和完善,基于位置服務(wù)(Location-based Services,LBS)的應(yīng)用越來(lái)越受到人們的關(guān)注。移動(dòng)用戶可以通過(guò)基于位置的服務(wù)查詢附近的餐館,酒店,加油站等場(chǎng)所的位置。但是,在用戶享受到基于位置服務(wù)的便利的同時(shí),自身的隱私也遭受著泄露的風(fēng)險(xiǎn)。攻擊者可以通過(guò)得到用戶的位置數(shù)據(jù)推測(cè)出用戶的宗教信仰、身體狀況、個(gè)性習(xí)慣等信息。因此人們?cè)絹?lái)越關(guān)注位置隱私方面的研究。而移動(dòng)設(shè)備市場(chǎng)上占有率80%的平臺(tái)Android平臺(tái)上的位置隱私保護(hù)方法研究成為當(dāng)前的研究熱點(diǎn)。當(dāng)前Android平臺(tái)位置隱私保護(hù)的研究存在著兩方面不足。在算法上,目前獨(dú)立架構(gòu)下的隱私保護(hù)方法和Android平臺(tái)下的位置隱私保護(hù)方法很多都只考慮了利用用戶的歷史查詢記錄,而攻擊者除此之外還掌握著位置屬性信息,比如當(dāng)前位置的人口密集程度。攻擊者可以以此推測(cè)出用戶的敏感位置。在系統(tǒng)上,目前修改位置的方法大多都對(duì)位置服務(wù)APP或者Android系統(tǒng)進(jìn)行修改,這些對(duì)普通用戶都不現(xiàn)實(shí)。而采用API劫持技術(shù)的方法也只針對(duì)于GPS定位。目前位置服務(wù)APP通常綜合考慮GPS定位、基站定位、Wifi定位等三種定位方式,所以只對(duì)GPS定位進(jìn)行修改并不能有效改變Android系統(tǒng)位置信息。本文針對(duì)這兩方面的不足提出了一種位置隱私保護(hù)算法,充分考慮到了位置屬性信息。并且采用API劫持技術(shù),綜合考慮Android平臺(tái)的定位方式,實(shí)現(xiàn)在Android系統(tǒng)上改變位置的目的。并將位置隱私保護(hù)算法應(yīng)用在Android平臺(tái)上,設(shè)計(jì)了一個(gè)APP,實(shí)現(xiàn)用戶可控的不同粒度上的隱私保護(hù)方法。同時(shí)保證位置服務(wù)APP對(duì)位置信息的訪問(wèn),不影響服務(wù)的可用性。實(shí)驗(yàn)結(jié)果表明,本文提出的算法能有效的防止用戶敏感位置的泄露,實(shí)現(xiàn)在不同粒度上保護(hù)用戶的位置隱私。并且設(shè)計(jì)的隱私保護(hù)APP系統(tǒng)開(kāi)銷(xiāo)都在合理的范圍內(nèi),不影響位置服務(wù)APP的可用性。
[Abstract]:With the development and perfection of wireless communication technology and location technology, the application of location based service (Location-based Services,LBS) has attracted more and more attention. Mobile users can query the location of nearby restaurants, hotels, gas stations and so on through location-based services. However, while users enjoy the convenience of location-based services, their privacy is also exposed to the risk of disclosure. The attacker can infer the user's religious belief, physical condition, personality habits and so on by obtaining the user's location data. Therefore, people pay more and more attention to the research of location privacy. The research of location privacy protection on Android platform, which has 80% of mobile device market, has become a hot research topic. At present, there are two deficiencies in the research of Android platform location privacy protection. In the algorithm, many privacy protection methods based on independent architecture and Android platform only consider using the user's history query record, and the attacker also has the location attribute information, in addition to this, many of the privacy protection methods under the independent architecture and the location privacy protection method under the Android platform only consider using the user's history query record. For example, the current location of the population density. An attacker can use this to speculate on the sensitive location of the user. In the system, most of the methods to modify the location of the location service APP or Android system, these are not realistic for ordinary users. The method of using API hijack technology is only for GPS positioning. At present, APP generally considers GPS location, base station location and Wifi location, so only modifying GPS location can not change the location information of Android system effectively. In this paper, a location privacy protection algorithm is proposed, which takes the location attribute information into account. The purpose of changing the position on Android system is realized by using API hijack technology and considering the positioning mode of Android platform. The location privacy protection algorithm is applied to the Android platform, and a APP, is designed to realize privacy protection in different granularity that the user can control. At the same time, ensure that the location service APP access to location information, do not affect the availability of the service. The experimental results show that the proposed algorithm can effectively prevent the leak of user's sensitive location and realize the protection of user's location privacy at different granularity. The designed privacy protection APP system overhead is within a reasonable range and does not affect the availability of location service APP.
【學(xué)位授予單位】：東北師范大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TP309;TP316

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