Li Yating, Zhu Jiawen, Fu Weina
Hunan Provincial Key Laboratory of Intelligent Computing and Language Information Processing, Hunan Normal University, Changsha, 410081 China.
College of Information Science and Engineering, Hunan Normal University, Changsha, 410081 China.
Mob Netw Appl. 2022;27(3):1162-1173. doi: 10.1007/s11036-022-01950-6. Epub 2022 Mar 18.
Long distance education is an important part during the COVID-19 age. An intelligent privacy protection with higher effect for the end users is an urgent problem in long distance education. In view of the risk of privacy disclosure of location, social network and trajectory of end users in the education system, this paper deletes the location information in the location set to protect the privacy of end user by providing the anonymous set to location. Firstly, this paper divides the privacy level of social networks by weighted sensitivity, and collects the anonymous set in social networks according to the level; Secondly, after the best anonymous set is generated by taking the data utility loss function as the standard, it was split to get an anonymous graph to hide the social network information; Finally, the trajectory anonymous set is constructed to hide the user trajectory with the l-difference privacy protection algorithm. Experiments show that the algorithm presented in this paper is superior to other algorithms no matter how many anonymous numbers there are, and the gap between relative anonymity levels is as large as 5.1 and 6.7. In addition, when the privacy protection intensity is 8, the trajectory loss rate presented in this paper tends to be stable, ranging from 0.005 to 0.007, all of which are less than 0.01. Meanwhile, its clustering effect is good. Therefore, the proportion of insecure anonymous sets in the algorithm in this paper is small, the trajectory privacy protection effect is good, and the location, social network and trajectory privacy of distance education end users are effectively protected.
远程教育是新冠疫情时代的重要组成部分。为终端用户提供一种高效的智能隐私保护是远程教育中亟待解决的问题。针对教育系统中终端用户位置、社交网络和轨迹的隐私泄露风险,本文通过对位置集进行位置匿名化处理来删除位置信息,以保护终端用户隐私。首先,本文通过加权敏感度划分社交网络的隐私等级,并根据等级收集社交网络中的匿名集;其次,以数据效用损失函数为标准生成最佳匿名集后,对其进行拆分得到匿名图以隐藏社交网络信息;最后,利用l-差分隐私保护算法构建轨迹匿名集来隐藏用户轨迹。实验表明,无论匿名数量多少,本文提出的算法均优于其他算法,相对匿名等级差距高达5.1和6.7。此外,当隐私保护强度为8时,本文提出的轨迹损失率趋于稳定,在0.005至0.007之间,均小于0.01。同时,其聚类效果良好。因此,本文算法中不安全匿名集的比例较小,轨迹隐私保护效果良好,有效保护了远程教育终端用户的位置、社交网络和轨迹隐私。