CAJ | 학술논문

地理围栏技术广泛应用于推荐系统、广告推送等服务中，存在严重的位置隐私泄露风险。针对地理围栏服务中的触发查询问题，设计了基于位置服务（location-based services，LBS）隐私保护模型。该模型基于安全三方计算理论，遵循位置模糊和位置k-匿名的理念，达到了身份不可关联和位置不可追踪的目标。借鉴计算几何方法解决了触发查询场景下的位置匿名隐藏问题，利用密码学原理实现用户身份秘密认证。从理论上分析了模型的安全性，从隐私保护角度来看，攻击者没有从LB S系统中获得新知识。实验验证了模型的计算效率和通信负载都优于传统的时空匿名方法。
지리위란기술엄범응용우추천계통、엄고추송등복무중，존재엄중적위치은사설로풍험。침대지리위란복무중적촉발사순문제，설계료기우위치복무（location-based services，LBS）은사보호모형。해모형기우안전삼방계산이론，준순위치모호화위치k-닉명적이념，체도료신빈불가관련화위치불가추종적목표。차감계산궤하방법해결료촉발사순장경하적위치닉명은장문제，이용밀마학원리실현용호신빈비밀인증。종이론상분석료모형적안전성，종은사보호각도래간，공격자몰유종LB S계통중획득신지식。실험험증료모형적계산효솔화통신부재도우우전통적시공닉명방법。
Geo-fencing technology is widely used in recommender systems,advertising push and other services.It has serious risk of personal privacy leakage threat.Focus on triggered query in Geo-fencing,the theories of the secure tri-partite computation were applied in the research of the LBS privacy-preserving model,which follows the concept of lo-cation obfuscation and location k-anonymity and reaches the target of user’s identity unlink-ability and location’s un-traced-ability.Location anonymity hidden problem and secret authentication problem were solved by computational ge-ometry techniques and principles of cryptography in the triggered queries scenario.Theoretical analysis shows the model is security.From the perspective of privacy-preserving,the attackers do not get new knowledge from LBS system.Ex-periments demonstrate the computational efficiency and communication loads of this medel are superior to the traditional spatial-temporal cloaking methods.