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arXiv 2408.07263cs.CR
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开放世界中通过无线流量窃听移动应用与操作

Eavesdropping Mobile Apps and Actions through Wireless Traffic in the Open World

Xiaoguang Yang, Yong Huang, Junli Guo, Dalong Zhang, Qingxian Wang

AI总结:

针对现有流量分析攻击依赖TCP/IP层、受限于闭世界假设的问题,提出基于WiFi MAC层流量的MACPrint系统,结合自动标注工具与带OpenMax的TCN模型,实现开放世界下移动应用及操作的高准确率识别。

摘要:

智能手机与WiFi网络在为人们生活带来诸多积极改变的同时,也易遭受流量分析攻击,这类攻击可从加密流量中推断用户隐私信息。现有流量分析攻击主要针对TCP/IP层,或受限于闭世界假设——即所有可能的应用与操作均已纳入模型训练。为克服这些局限,我们提出MACPrint,这是一种在开放世界场景下基于WiFi MAC层流量推断移动应用及应用内操作的新型系统。MACPrint首先提取加密无线流量的丰富统计特征与上下文特征;随后,我们开发了Label Recorder(一款自动流量标注应用),以提升训练阶段的标注准确率;最后,采用搭载OpenMax函数的TCN模型,在开放世界中精准识别移动应用与操作。为评估该系统,我们采集了来自40余款应用、时长超125小时的MAC层流量数据。实验结果表明,MACPrint在闭世界场景下识别应用与操作的准确率可达96%以上,在开放世界场景下的准确率则超过86%。

英文摘要:

While smartphones and WiFi networks are bringing many positive changes to people's lives, they are susceptible to traffic analysis attacks, which infer user's private information from encrypted traffic. Existing traffic analysis attacks mainly target TCP/IP layers or are limited to the closed-world assumption, where all possible apps and actions have been involved in the model training. To overcome these limitations, we propose MACPrint, a novel system that infers mobile apps and in-app actions based on WiFi MAC layer traffic in the open-world setting. MACPrint first extracts rich statistical and contextual features of encrypted wireless traffic. Then, we develop Label Recorder, an automatic traffic labeling app, to improve labeling accuracy in the training phase. Finally, TCN models with OpenMax functions are used to recognize mobile apps and actions in the open world accurately. To evaluate our system, we collect MAC layer traffic data over 125 hours from more than 40 apps. The experimental results show that MAC-Print can achieve an accuracy of over 96% for recognizing apps and actions in the closed-world setting, and obtains an accuracy of over 86% in the open-world setting.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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