Protective characteristics of films from laser acoustic reconnaissance systems on the example of a single-layer reflective coating of hafnium dioxide
DOI:
https://doi.org/10.18372/2225-5036.29.17550Keywords:
laser, laser acoustic reconnaissance systems, information leakage channel, glass, coatings, filmsAbstract
The leakage of confidential information is considered one of the most common problems in the fight against professional espionage. For this, various methods of protecting information through all possible channels of its leakage have been developed for decades. One of the ways to ensure information security is the detection and timely localization of possible technical channels of acoustic information leakage. In this work, the reflection coefficient of glass with a sprayed single-layer coating of hafnium dioxide was studied using spectral characteristics. The coefficient of reflection of the laser beam from the glass was chosen as an indicator of security. In addition to protective films, it is suggested to use glass with a special reflective coating. Hafnium dioxide was chosen as the atomizer, as its refractive index is much higher than that of glass. Sputtering of the dielectric coating was carried out using a TORR (USA) vacuum sputtering unit. Spectral analysis of glass was carried out on a Shimadzu UV-3600 spectrophotometer, which allows you to measure the spectrum of the obtained films in the reflection and transmission mode in the wave range from 300 to 1500 nm. It was established that the reflection coefficient of glass with a sprayed film is significantly higher compared to pure glass. Therefore, the НfO2 film satisfies the requirements set out in the problem. It is recommended to use sputtering of hafnium dioxide on the glass to increase the reflection coefficient as protection against laser reading of information in the ranges of 300 - 350, 500 - 700, and 1000 - 1500 nm.
References
. Valeriy Dudykevych, Ivan Prokopyshyn, Vasyl Chekurin, Ivan Opirskyy, Yuriy Lakh, Taras Kret, Yevheniia Ivanchenko, Ihor Ivanchenko. A multicriterial analysis of the efficiency of conservative information security systems // Eastern-european journal of enterprise technologies. Information and controlling system. – Vol 3, No 9(99), pp.6-13, (2019). https://doi.org/ 10.15587/ 1729-4061.2019.166349.
. Gergely Takacs, Jakub Otčenaš, Jan Vachalek, Boris Rohal’-Ilkiv. Modal response-based technical countersurveillance measure against laser microphones. Journal of Vibroengineering, 2016, vol. 18, Issue 5, Mode of access: https://www.jvejournals.com/article/16943.
. Security of the digital transformation. Shanim A., Computers and Security. Open access. Volume 108. September 2021. Article number 102345. ISSN 01674048/ DOI 10.1016/ j.cose.2021.102345.
. Dudykevych Valeriy, Berezuk Bogdan, Dzianyi Nazar, Garanuk Petro, Rakobovcuk Larysa. Modern technologies analysis of protection of language information from laser removing // Захист інформації і безпека інформаційних систем: матеріали VIІ міжнародної науково-технічної конференції (Львів, 30–31 травня 2019 р.). 2019. C. 132–133.
. Infrared radiation. [Electronic resource]. – Mode of access: https: // uk.wikipedia.org / wiki / 96%D0.
. Laser-sound: optoacoustic transduction from digital audio streams / Kaleris K., Stelzner B., Hatziantoniou P., Trimis D., Mourjopoulos J. // Scientific reports. Open access. Vol. 11, issue №1. December 2021. Article number 476.
. Breakthrough instruments and products PhotoSonus M+ laser for photoacoustic imaging / Juronis A., Jasinskas M. // Review of scientific instruments. Open access. Volume 92, Issue 5, 1 May 2021, Article number 059502. ISSN 00346748/ DOI 10.1063/5.0053559.
. Test and analysis of window vibration for anti-laser-eavesdropping / Zeng U., Pan B., Cao Y., Ai H.// Applied acoustics. Volume 176. May 2021, Article number 107871. ISSN 0003682X / DOI 10.1016 / j.apacoust. 2020.107871.
. Listening with curiosity-tracking the acoustic response of portable laser ablation. Kradolfer S., Heutschi K., Koch J., Gunther D./ Chimia. Open acess. Volume 75, Issue 4, Pages 300-304, April 2021. ISSN 00094293/ DOI 10.2533/Chimia.2021.300.
. Wu and S. Haruyama, "Real-time audio detection and regeneration of moving sound source based on optical flow algorithm of laser speckle images," Opt. Express 28, pp. 4475-4488 (2020).
. Liyan Li, Hualin Zeng, Yuze Zhang, Qingshan Kong, Yan Zhou, and Yuliang Liu, "Analysis of backscattering characteristics of objects for remote laser voice acquisition," Appl. Opt. 53, 971-978 (2014).
. Molebny V., Steinvall O. (2013) Laser Remote Sensing: Velocimetry Based Techniques. In: Tuchin V. (eds) Handbook of Coherent-Domain Optical Methods. Springer, New York, NY.
. A. Horev and A. Savin, "Efficiency Research of Sun Protection Window Films for Speech Information Protection from LEAKAGE by Optoelectronic Channel," 2021 IEEE Conference of Russian Young Researchers in Electrical and Electronic Engineering (ElConRus), 2021, pp. 2335-2339, doi: 10.1109/ ElConRus51938. 2021. 939-6253.
. Sen Taner. Reflection Properties of a Gaussian Laser Beam from Multilayer Dielectric Films. Master’s Thesis. Urla Izmir, Turkey 2009. 97 p.
. D.O. Smith (1965) Magneto-optical Scattering from Multi-layer Magnetic and Dielectric Films, Optica Acta: International Journal of Optics, 12:1, 13-46, DOI: 10.1080/713817902.
. J. Poliak, P. Pezzei, E. Leitgeb and O.Wilfert, Analytical Expression of FSO Link Misalignments Considering Gaussian Beam Institute of Radio Electronics, Brno University of Technology, Purkyova 118, 612 00 Brno, Czech Republic Institute of Microwave and Photonic Engineering, Graz University of Technology, Inffeldgasse 12, Graz, Austria NOC/OC&I 2013, ISBN: 978-1-4673-5822-4.
. Krenar Sh. Rexhepi. Reflection-Analysis on Different Types of LightBeams for Short Distances. Master’s Thesis, Institute of Microwave and Photonic Engineering Graz University of Technology, Austrian, 2014. 103 p. [Electronic resource]. Mode of access: https://diglib.tugraz.at/download.php?id=576a750e93c5b&location=browse.
. Nassi, B., Pirutin, Y., Shamir, A., Elovici, Y., & Zadov, B. (2020). Lamphone: Real-Time Passive Sound Recovery from Light Bulb Vibrations. IACR Cryptol. ePrint Arch., 2020, 708. https: / /eprint. iacr.org/ 2020 / 708.pdf.
. Gao, Y., Song, J., Li, S. et al. Hydrogel microphones for stealthy underwater listening. Nat Commun 7, 12316 (2016). https: / / doi.org/ 10.1038/ncomms 12316.
. Ploretaryi [GOST 111-90], [Electronic resource]. Mode of access: http://proletarij.com.ua/ Lysychansk glass factory "Proletary", http://ukrglass.info/ [Glass of Ukraine].
. Saint Gobain glass, [Electronic resource]. Mode of access: http: // uk.saint-gobain-glass.com/content/ sgg-diamant% C2%AE- product -brochure. SGG DIAMANT® Product Brochure.
. Glass Time. Technical Mannual. Publisher: GUARDIAN Europe Dudelange/ Luxemburg, 2013. p. 218]. [Electronic resource]. Mode of access: https:// www.guardian.com/europe/index.htm.
. [Electronic resource]. Mode of access: http://www.euroglas.com, EUROGLAS. Products and data. – Publisher: EUROGLAS. – Butzberg, 2010, p. 161].
. [Electronic resource]. Mode of access: http://www.pilkington.com/, Pilkington Glass Handbook. Publisher: Nippon Sheet Glass Co. Ltd. 2010. Р. 200.
. [Electronic resource]. Mode of access: http:// www.orionglass.com.ua/.
. [Electronic resource]. Mode of access: https:/ /luminophor.ru/catalog/plenkoobrazuyushchie-materialy/oksidy/gafniy-iv-oksid/.
. Installation of a vacuum spraying [Electronic resource]. Mode of access: http://www.goldenage. kiev. ua/nitrid_2.htm.
. Optical monitor Dyn-optic Model 590 [Electronic resource]. Mode of access: http: // dynoptics. com/?product=model-590-optical-monitor.
. Two-beam spectrophotometer Shimadzu UV-3600 [Electronic resource]. Mode of access: http:/ /shvaiko.ru/?p=670.
. Spectrophotometer UV-3600 [Electronic resource]. Mode of access: http://www.analyt.ru/catalog/element.php?ID=946.
