Secure User Authentication Leveraging Keystroke Dynamics via Wi-Fi Sensing
Secure User Authentication Leveraging Keystroke Dynamics via Wi-Fi Sensing
复制标题
通过 Wi-Fi 传感利用击键动态进行安全用户身份验证
DOI:
10.1109/tii.2021.3108850
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发表时间:
2022-04
影响因子:
12.3
通讯作者:
Mianxiong Dong
中科院分区:
文献类型:
--
作者:
Yu Gu;Yantong Wang;Meng Wang;Zulie Pan;Zhihao Hu;Zhi Liu;Fan Shi;Mianxiong Dong
User authentication plays a critical role in access control of a man-machine system, where the knowledge factor, such as a personal identification number, constitutes the most widely used authentication element. However, knowledge factors are usually vulnerable to the spoofing attack. Recently, the inheritance factor, such as fingerprints, emerges as an efficient alternative resilient to malicious users, but it normally requires special equipment. To this end, in this article, we propose WiPass, a device-free authentication system only leveraging the pervasive Wi-Fi infrastructure to explore keystroke dynamics (manner and rhythm of keystrokes) captured by the channel state information to recognize legitimate users while rejecting spoofers. However, it remains an open challenge to characterize the behavioral features hidden in the human subtle motions, such as keystrokes. Therefore, we build a signal enhancement model using Ricean distribution to amplify user keystroke dynamics and a hybrid learning model for user authentication, which consists of two parts, i.e., convolutional neural network based feature extraction and support vector machine based classification. The former relies on visualizing the channel responses into time-series images to learn the behavioral features of keystrokes in energy and spectrum domains, whereas the latter exploits such behavioral features for user authentication. We prototype WiPass on the low-cost off-the-shelf Wi-Fi devices and verify its performance. Empirical results show that WiPass achieves on average 92.1% authentication accuracy, 5.9% false accept rate, and 6.3% false reject rate in three real environments.
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