基于视频侧信道的智能门锁PIN码分析机制  

PIN Code Analysis Mechanism of Intelligent Door Lock Based on Video Side Channel

作　　者：郭振洋 闵静怡 闫皓 曹进 李晖[1,2] GUO Zhenyang;MIN Jingyi;YAN Hao;CAO Jin;LI Hui(School of Cyber Engineering,Xidian University,Xi an 710126,China;The State Key Laboratory of Integrated Services Networks,Xidian University,Xi an 710126,China;Hangzhou Institute of Technology,Xidian University,Hangzhou 311231,China)

机构地区：[1]西安电子科技大学网络与信息安全学院,西安710126 [2]西安电子科技大学空天地一体化综合业务网全国重点实验室,西安710126 [3]西安电子科技大学杭州研究院,杭州311231

出　　处：《网络空间安全科学学报》2023年第1期106-117,共12页Journal of Cybersecurity

基　　金：国家重点研发计划(2023YFB3103401);国家自然科学基金(61772404)。

摘　　要：智慧家庭随着物联网技术的不断发展逐步普及,越来越多的智能门锁、监控摄像头、智能门铃等设备被用户安装用于保障个人财产安全与个人隐私。为了评估智能门锁上PIN码认证机制的安全性,文章提出了一种针对常见智慧家庭场景的基于视频的侧信道攻击方案。在该方案中,为攻击者设立了合理的能力,并对PIN码长度、门与门之间的距离等因素进行了综合分析。为验证该方案,搭建了一个仿真实验场景,并邀请了10名受试者参加实验。实验结果表明,文章所提出的方案在可以实现自动化识别与分析过程的同时,在常用社交距离对用户的PIN码解锁行为实施基于视频的侧信道攻击可达到5次尝试内86.6%的推断准确率,在中等距离对用户的PIN码解锁行为实施基于视频的侧信道攻击可达到5次尝试内50%以上的推断准确率。With the continuous development popularization of Internet of Things(IoT)technology,smart homes are becoming progressively ubiquitous.more and more smart door locks,surveillance cameras,and intelligent doorbells are installed in users to secure personal property and privacy.In order to evaluate the security of PIN code authentication mechanisms on smart door locks,a video-based side-channel attack scheme in common smart home scenarios is proposed in this paper.In this scheme,the reasonable capabilities are established for the attacker,and the comprehensive analysis is conducted on the factors of the PIN length and distance between the doors.A simulation experiment was built to validate the proposed scheme,and 10 subjects were invited to participate the test.Experimental results show that,while enabling the automated identification and analysis,the proposed scheme can implement the video-based side-channel attacks on users PIN unlocking behavior at regular social distances with an inference accuracy rate of 86.6%for 5 tries,and at medium distances with an inference accuracy rate above 50%for 5 tries.

关 键 词：智慧家庭 PIN码 关键点检测技术 侧信道攻击 

分 类 号：TN918[电子电信—通信与信息系统] TP393.0[电子电信—信息与通信工程]