Reconstruction of Video Information Through Leakaged Electromagnetic Waves From Two VDUs Using a Narrow Band-Pass Filter

Abstract

This paper proposes a method to reconstruct an original video display from electromagnetic leakage by using the characteristics of digital video interfaces (e.g., digital visual interface (DVI) and high-definition multimedia interface (HDMI)). Moreover, it is proven that the analysis is applicable through a very narrow multiband pass filter when multiple video display units (VDUs) with identical video properties (resolution, refresh rate, etc.) are placed together and emanate simultaneously. The proposed method is verified with our reconstruction system and is expected to contribute to improving the security of video display signals by raising awareness regarding information leakage risks.

Wireless Communication: Applications Security and Reliability—Present and Future

“…The authors of the articles paid attention to many aspects of wireless communication, existing threats, and solutions whose application increases the level of information security. The issues discussed in detail showed how important elements are communication reliability [7][8][9], information security [10,11], and resistance to various types of external attackscyberattacks [12,13], cryptographic attacks [14,15], or electromagnetic attacks [16][17][18][19].…”

A Quantitative Analysis of Compromising Emanation From TMDS Interface and Possibility of Sensitive Information Leakage

“…Now, this paper conducts another case where the previously defined S f r1 and S f r2 are collected in the SDR simultaneously, including additive noise as in (19). The respective SNR from each viewpoint is in (20).…”

“…In (20), the parameters that use the subscript 1 are regarded as the S base , as shown in Fig. 10-( Since the required minimum SNR to achieve meaningful information is 12.12 dB and 15.35 dB, as discussed in the previous part, the frame average for S mult is conducted after the adjustment in (12), and the formulations of the frameaveraging are expressed as in (21).…”

“…Given the frame-averaging is conducted for respective information using their own parameters [20], the objective S f r among the two kinds may satisfy the coherency and remain during the process. While the other S f r is eliminated by destructive interference by incoherency and averaging divider K, as described in (21).…”

Design of Robust Security Fonts and Color Composition against Unintended Electromagnetic Emanations from Display Systems

“…이어지는 그림 4에서는 앞서 소개한 3가지 색상 정보 를 지닌 TMDS 부호화된 전자 신호들을 고속 푸리에 변 환(FFT)을 수행한 결과를 나타낸다. 이로부터, 전자 신호 에서 발생하는 누설 전자파의 주파수 특성이 매우 넓은 대역에 걸쳐 발생하는 것을 확인할 수 있으며, 이는 굳이 스펙트럼상에 나타난 누설 전자파를 전 대역에 걸쳐 수 집할 필요 없이 신호 대 잡음비(SNR) 확보 차원에서 상당 한 이점을 가져갈 수 있는 협대역 수집 장치를 활용하여 도 검정 화소와 하얀 화소의 주파수별 특성이 두드러지 게 차이나는 점을 활용하여 유의미한 화면 정보의 추출 이 가능함을 의미한다 [6], [9], [10], [15], [16] . 그림 2.…”