Novel method to detect and recover the keystrokes of PS/2 keyboard

作者：Du Yulei^*; Lu Yinghua; Zhang Jin Ling

来源：Progress in Electromagnetics Research C, 2013, 41: 151-161.

• Electronic component
• Ground lines
• Information leakage
• Power outlet
• Ps/2 keyboards
• Radiative coupling
• Sensitive informations

Computer keyboards are often used to transmit confi-dential data such as passwords. The sensitive information such as keystrokes could be recovered by using the electromagnetic (EM) waves from the electronic components of the keyboard. In this paper, we have investigated the information leakage on the ground line of the PS/2 serial cable due to crosstalk and radiative coupling. The coupling princi- ples are analyzed firstly. And then, through the experiments we found that the signals of keystrokes could leak to the ground line network which could then be detected on the other power outlets whose share the same electric line. Lastly, the eavesdropping experiments demon- strated that the keystrokes could be reproduced on the other places of the ground line network with no trace.

• 出版日期2013
• 单位北京大学