Personalized Keystroke Dynamics for Self-Powered Human-Machine Interfacing
Personalized Keystroke Dynamics for Self-Powered Human-Machine Interfacing
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DOI：
10.1021/nn506832w
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发表时间：
2015-01-01
期刊：
影响因子：
17.1
通讯作者：
Wang, Zhong Lin
中科院分区：
文献类型：
--
作者：
Chen, Jun;Zhu, Guang;Wang, Zhong Lin
计算机键盘是用于人机交互和信息交换的最常见、最可靠、最容易获得和最有效的工具之一。尽管键盘被用于推进人类文明已有数百年的历史，但使用智能键盘通过击键动力学来研究人类行为仍然是一个巨大的挑战。在这里，我们报告了一种自我供电的非机械打孔键盘，它通过人的手指和按键之间的接触带电来实现，它将施加在键盘上的机械刺激转换为本地电子信号，而不需要施加外部电源。智能键盘(IKB)不仅可以在手指轻轻敲击时灵敏地触发无线报警系统，还可以通过检测字母输入之间和输入过程中的动态时间间隔以及每次打字操作所使用的力来跟踪和记录打字内容。这些功能有望成为一种智能安全系统，可以实现检测、警报、记录和识别。此外，在击键动力学的行为生物测定的帮助下，IKB能够从不同的个人中识别出个人特征。此外，IKB可以有效地利用打字运动为商业电子设备充电，以超过每分钟100个字符的任意打字速度进行充电。鉴于上述特点，IKB不仅可以潜在地应用于自供电电子产品，还可以应用于人工智能、网络安全和计算机或网络访问控制。
The computer keyboard is one of the most common, reliable, accessible, and effective tools used for human-machine interfacing and information exchange. Although keyboards have been used for hundreds of years for advancing human civilization, studying human behavior by keystroke dynamics using smart keyboards remains a great challenge. Here we report a self-powered, non-mechanical-punching keyboard enabled by contact electrification between human fingers and keys, which converts mechanical stimuli applied to the keyboard into local electronic signals without applying an external power. The intelligent keyboard (IKB) can not only sensitively trigger a wireless alarm system once gentle finger tapping occurs but also trace and record typed content by detecting both the dynamic time intervals between and during the inputting of letters and the force used for each typing action. Such features hold promise for its use as a smart security system that can realize detection, alert, recording, and identification. Moreover, the IKB is able to identify personal characteristics from different individuals, assisted by the behavioral biometric of keystroke dynamics. Furthermore, the IKB can effectively harness typing motions for electricity to charge commercial electronics at arbitrary typing speeds greater than 100 characters per min. Given the above features, the IKB can be potentially applied not only to self-powered electronics but also to artificial intelligence, cyber security, and computer or network access control.