Pengaruh Turbulensi Atmosfer terhadap Sistem Quantum Key Distribution dengan Media Transmisi Ruang Bebas

Pasha, Elfath Maghfira (2025) Pengaruh Turbulensi Atmosfer terhadap Sistem Quantum Key Distribution dengan Media Transmisi Ruang Bebas. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Perkembangan teknologi telekomunikasi dan algoritma komputer kuantum meningkatkan kebutuhan terhadap keamanan sistem komunikasi. Quantum Key Distribution dengan prinsip mekanika kuantum memberikan solusi terhadap ancaman algoritma komputer kuantum. Namun terdapat tantangan yang dihadapi pada Quantum Key Distribution pada media transmisi ruang bebas, yakni adanya turbulensi di atmosfer yang mempengaruhi transmisi sinyal. Meskipun telah diyakini bahwa turbulensi atmosfer mempengaruhi sistem Quantum Key Distribution, namun perlu dilakukan kajian untuk mengetahui parameter yang dipengaruhi dan menentukan tingkat keamanan sistem yang berjalan. Penelitian ini mengkuantifikasi dampak turbulensi atmosfer melalui metode simulasi protokol QKD BB84, di mana kanal atmosfer dimodelkan secara realistis menggunakan Metode Split-Step dengan profil turbulensi Hufnagel-Valley untuk merepresentasikan keadaan fisis turbulensi. Simulasi dijalankan dalam berbagai skenario dengan memvariasikan panjang lintasan propagasi dari 1 km hingga 24 km dan kecepatan angin pada 21 m/s serta 40 m/s. Hasil menunjukkan bahwa turbulensi atmosfer secara signifikan menurunkan efisiensi sistem dengan Sifted Key Rate (SKR) rata-rata mengalami penurunan performa sebesar 53,61%, dari 0,498 pada kondisi ideal menjadi 0,231 pada kondisi turbulensi. Sebaliknya, Quantum Bit Error Rate (QBER) tetap stabil pada 0%. Selain itu, variabel panjang lintasan propagasi menjadi faktor yang paling berpengaruh terhadap sistem Quantum Key Distribution.
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The advancement of telecommunication technology and quantum computer algorithms has increased the demand for secure communication systems. Quantum Key Distribution (QKD), based on the principles of quantum mechanics, offers a solution to the threats posed by quantum computer algorithms. However, the implementation of QKD over free-space transmission media faces the challenge of atmospheric turbulence affecting signal transmission. Although the impact of atmospheric turbulence on QKD systems is acknowledged, a study is required to identify the affected parameters and to determine the operational security level of the system. This research quantifies the impact of atmospheric turbulence through a simulation of the QKD BB84 protocol, where the atmospheric channel is realistically modeled using the Split-Step Method with a Hufnagel-Valley turbulence profile to represent the physical conditions of turbulence. The simulation was conducted under various scenarios by varying the propagation path length from 1 km to 24 km and wind speeds at 21 m/s and 40 m/s. The results show that atmospheric turbulence significantly decreases system efficiency, with the average Sifted Key Rate (SKR) experiencing a performance drop of 53.61%, from 0.498 in ideal conditions to 0.231 in turbulent conditions. Conversely, the Quantum Bit Error Rate (QBER) remained stable at 0%. Furthermore, the propagation path length was identified as the most influential factor on the Quantum Key Distribution system.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Quantum Key Distribution, Media Transmisi Ruang Bebas, Protokol BB84, Turbulensi Atmosfer, Sifted Key Rate, Quantum Bit Error Rate, Quantum Key Distribution, Free-Space Transmission Media, BB84 Protocol, Atmospheric Turbulence, Sifted Key Rate, Quantum Bit Error Rate
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK5102.94 Cryptographic techniques T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK5103.2 Wireless communication systems. Two way wireless communication T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK5101 Telecommunication
Divisions:	Faculty of Intelligent Electrical and Informatics Technology (ELECTICS) > Electrical Engineering > 20201-(S1) Undergraduate Thesis
Depositing User:	Elfath Maghfira Pasha
Date Deposited:	27 Jul 2025 12:49
Last Modified:	27 Jul 2025 12:49
URI:	http://repository.its.ac.id/id/eprint/121954

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