Analysis of PS/2 compromising emanations

Bogdan Trip; Vlad Butnariu; Valentin Velicu; Simona Halunga; Alexandru Boitan

doi:10.1117/12.2571338

31 December 2020 Analysis of PS/2 compromising emanations

Bogdan Trip, Vlad Butnariu, Valentin Velicu, Simona Halunga, Alexandru Boitan

Proceedings Volume 11718, Advanced Topics in Optoelectronics, Microelectronics and Nanotechnologies X; 1171823 (2020) https://doi.org/10.1117/12.2571338
Event: Advanced Topics in Optoelectronics, Microelectronics and Nanotechnologies 2020, 2020, Online Only

Abstract

This paper presents a new approach regarding the unintended radiation generated by the PS/2 commercial keyboards. It was possible to restore the keystrokes in a controlled environment by receiving the PS/2 bus clock as opposed to receiving the data bus transitions as it has been presented so far in the literature. Examples of keystrokes corresponding to several alphanumeric keys as well as functional keys that are confirmed by galvanic probing of the PS/2 line with an oscilloscope will be presented. The paper presents time domain measurements of the unintended radiation for different keystrokes and also examples of remote reception. We can conclude that the keystroke's compromising radiation can take multiple forms from which the key pressed can be identified with certainty, showing thus a new vulnerability.

Citation Download Citation

Bogdan Trip, Vlad Butnariu, Valentin Velicu, Simona Halunga, and Alexandru Boitan "Analysis of PS/2 compromising emanations", Proc. SPIE 11718, Advanced Topics in Optoelectronics, Microelectronics and Nanotechnologies X, 1171823 (31 December 2020); https://doi.org/10.1117/12.2571338

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