Detection of electromagnetic emissions transmitted on the power line through electrical conduction

Macovei, Andrei; Boitan, Alexandru; Trip, Bogdan; Butnariu, Vlad; Rosu, Georgiana; Halunga, Simona

doi:10.1109/icate.2018.8551437

Cited by 8 publications

(4 citation statements)

References 7 publications

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“…In the TEMPEST evaluation process, all digital signals transferred from the communication ports of the tested equipment are considered to be compromising signals, such as PS/2 port connector [1], USB (Universal Serial Bus ports or peripherals) [2,3], RJ45 modular connector [4], video signals from VGA (Video Graphics Array), DVI (Digital Visual Interface), HDMI (High-Definition Multimedia Interface) and other display ports [5][6][7] or RS232 serial port [8]. Output devices such as printers [9][10][11][12] and video projectors [13] are also being investigated.…”

Section: Introductionmentioning

confidence: 99%

Assessing the Security of TEMPEST Fonts against Electromagnetic Eavesdropping by Using Different Specialized Receivers

Kubiak

Boitan²,

Halunga

2020

Applied Sciences

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The main topic of the present paper is the printed text protection against electromagnetic infiltration. There are many solutions to protect such data. One of these methods is the one that uses computer fonts that are characterized by special shapes. The suitability of the solution has to be confirmed by many tests and analyses. An important element of such researches is the class of receiving devices used. In the case of measurements of the valuable emissions arising from electronic data processing of the printed text, typical receivers that are used for measurements of electromagnetic compatibility cannot be used. They have to be dedicated devices for measuring the very low level of signal that arises unintentionally. The sensitivity of the receiver must be very high in wide measuring bands. In addition, in order to assess the method of preventing electromagnetic infiltration, it is important to verify it by independent institutions. An additional advantage is the use of different receivers in the assessment process. This paper presents the results of studies made regarding the suitability of two sets of fonts with special shapes (secure symmetrical and secure asymmetrical) in secure information processing. The analysis of the fonts was based on visual examination, a basic method of preliminary assessment of electromagnetic emissions correlated with processed text information, of the images reproduced from unwanted emissions. The tests were carried out at two independent institutions, Military Communication Institute—Poland, Special Telecommunications Services—Romania, using three different types of receivers: Tempest Test System DSI-1550A, Rohde & Schwarz FSET22 and Rohde & Schwarz FSWT. The images obtained in the two independent laboratories with different setup and test equipment confirmed thus without doubt the possibility of using special fonts as the solution against an effectiveness of electromagnetic infiltration. The above assessment is correct, regardless of the used receiver and the environment of implementation of the secure fonts.

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Section: Introductionmentioning

confidence: 99%

Assessing the Security of TEMPEST Fonts against Electromagnetic Eavesdropping by Using Different Specialized Receivers

Kubiak

Boitan²,

Halunga

2020

Applied Sciences

Self Cite

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“…The information infiltration process represents the access to information processed by the equipment through reception and processing techniques of electromagnetic emissions generated by the targeted equipment without having physical access to it. The risks associated with the process of electromagnetic infiltration are very often described and analyzed in relation to computers [5][6][7], monitors [5,[8][9][10][11] or laser printers [12][13][14][15]. Each such device becomes a source of undesirable emissions, which enable non-invasive acquisition of information.…”

Section: Introductionmentioning

confidence: 99%

Method of Colors and Secure Fonts Used for Source Shaping of Valuable Emissions from Projector in Electromagnetic Eavesdropping Process

et al. 2020

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The protection of information processed electronically involves a large number of IT devices from computer sets or laptops to monitors, printers, servers, etc. In many cases, classified information processing might be associated with the use of projectors, which are an indispensable element of meetings for a limited group of people. Such devices are connected to computers through interfaces of various analogue and digital standards and can become an additional source of unwanted emissions, and the distinctive features of these emissions allow the information displayed to be unwantedly reproduced. This paper offers evidence of the existing threat related to electromagnetic infiltration of several projectors, by showing images reconstructed from registered revealing emissions. The paper presents an analysis of several solutions that can be used to reduce the level of infiltration susceptibility of projectors or to highlight this property in the device assessment process. The possibilities of using special computer fonts and the so-called method of colors—background color and text color—is analyzed. The tests were carried out on randomly selected projectors in two independent laboratories, and, based on these results, a number of interesting conclusions have been highlighted at the end.

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“…Each device is a source of valuable emissions which allow to reconstruct primary information. The information become visible, readable and intelligible ( [4][5][6][7], Figure 1). It is possible because information is processed in graphic form.…”

Section: Introductionmentioning

confidence: 99%

Possibilities of Electromagnetic Penetration of Displays of Multifunction Devices

2020

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A protection of information against electromagnetic penetration is very often considered in the aspect of the possibility of obtaining data contained in printed documents or displayed on screen monitors. However, many printing devices are equipped with screens based on LED technology or liquid crystal displays. Options enabling the selection of parameters of the printed document, technical settings of the device (e.g., screen activity time) are the most frequently displayed information. For more extensive displays, more detailed information appears, which may contain data that are not always irrelevant to third parties. Such data can be: names of printed documents (or documents registered and available on the internal media), service password access, user names or regular printer user activity. The printer display can be treated as a source of revealing emissions, like a typical screen monitor. The emissions correlated with the displayed data may allow us to obtain the abovementioned information. The article includes analyses of various types of computer printer displays. The tests results of the existing threat are presented in the form of reconstructed images that show the possibility of reading the text data contained in them.

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Detection of electromagnetic emissions transmitted on the power line through electrical conduction

Cited by 8 publications

References 7 publications

Assessing the Security of TEMPEST Fonts against Electromagnetic Eavesdropping by Using Different Specialized Receivers

Assessing the Security of TEMPEST Fonts against Electromagnetic Eavesdropping by Using Different Specialized Receivers

Method of Colors and Secure Fonts Used for Source Shaping of Valuable Emissions from Projector in Electromagnetic Eavesdropping Process

Possibilities of Electromagnetic Penetration of Displays of Multifunction Devices

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