Implementasi skema pengacakan subcarrier OFDM dengan algoritma RSA pada NI-USRP

Main Article Content

Nihayatus Sa'adah I Gede Puja Aswara Amang Sudarsono

Abstract

Abstrak


Keamanan jaringan nirkabel merupakan salah satu hal terpenting dalam sistem komunikasi. Karena sinyal dikirim dari pengirim melalui saluran nirkabel,  tidak hanya penerima yang sah, tetapi juga penyadap dapat menangkap dan menyimpan sinyal informasi dengan mudah. Penelitian ini mengeksplorasi skema keamanan  komunikasi nirkabel dimana skema yang digunakan adalah pengacakan subcarrier. Pemancar dan penerima harus disinkronkan untuk mengembalikan subcarrier ke posisi semula. Sistem ini menggunakan algoritma RSA sebagai sinkronisasi. Teknologi keamanan pengacakan subcarrier  diimplementasikan pada sistem OFDM. Sistem OFDM  diimplementasikan menggunakan perangkat USRP. Hasil yang diperoleh dari penelitian ini membuktikan bahwa teknik keamanan yang digunakan tidak menurunkan kinerja sistem, bahkan dapat mengurangi jumlah kesalahan bit akibat teknik sinkronisasi. Dengan teknik sinkronisasi algoritma RSA, dari jarak pengujian 1 meter, 2 meter, dan 5 meter. Pada jarak 1 meter didapatkan hasil terbaik dengan penurunan error bit dari 19,04% menjadi 0% pada 32-QAM dan penurunan error bit dari 28,57% menjadi 4,76% pada 64-QAM


Abstract


Wireless network security is one of the essential things in communication systems. Since the signal is sent from the sender through a wireless channel, the legitimate receiver and eavesdropper can easily capture and store signal information. This study explores a wireless communication security scheme where the scheme used is subcarrier randomization. The transmitter and receiver must be synchronized to return the subcarrier to its original position. This system uses the RSA algorithm as synchronization. Subcarrier randomization security is implemented in OFDM system. OFDM system is implemented using USRP. The results from this study prove that security techniques don't reduce system performance, and can even reduce the number of errors due to synchronization techniques with RSA synchronization technique, with 1meter, 2meters, and 5meters experiments. At 1meter distance is the best result with bit error drop from 19.04% to 0% on 32-QAM and a bit error drop from 28.57% to 4.76% on 64-QAM.

Downloads

Download data is not yet available.

Article Details

How to Cite
SA'ADAH, Nihayatus; ASWARA, I Gede Puja; SUDARSONO, Amang. Implementasi skema pengacakan subcarrier OFDM dengan algoritma RSA pada NI-USRP. JURNAL ELTEK, [S.l.], v. 20, n. 2, p. 79-86, oct. 2022. ISSN 2355-0740. Available at: <https://eltek.polinema.ac.id/index.php/eltek/article/view/354>. Date accessed: 09 dec. 2022. doi: https://doi.org/10.33795/eltek.v20i2.354.
Section
Articles

References

[1] Zhao, J., Liu, B., Mao, Y., Ullah, R., Ren, J., Chen, S., ... & Shen, J. (2020). High keamanan OFDM-PON with a physical layer encryption based on 4D-hyperchaos and dimension coordination optimization. Optics Express, 28(14), 21236-21246.
[2] Abirami, M., R. Gandhiraj, and K. P. Soman. "Performance analysis of Real time OFDM based communication system using GNU Radio and USRP." International Journal of Advanced Research in Computer Science and Software Engineering 3.6 (2013).
[3] Golstein, Sidney J., et al. "Physical Layer Security in an OFDM Time Reversal SISO Communication With Imperfect Channel State Information." Ieee Access 10 (2022): 26778-26794.
[4] Golstein, Sidney, et al. "Physical layer security in frequency-domain time-reversal SISO OFDM communication." 2020 International Conference on Computing, Networking and Communications (ICNC). IEEE, 2020.
[5] Melki, Reem, Hassan N. Noura, and Ali Chehab. "An efficient and secure cipher scheme for MIMO–OFDM systems based on physical layer security." Telecommunication Systems 79.1 (2022): 17-32.
[6] Sultan, Amber, et al. "Dynamic QAM mapping for physical-layer security using digital chaos." IEEE Access 6 (2018): 47199-47205.
[7] R. P. Hudhajanto, I. G. P. Astawa, A. Sudarsono, Covert Communication in MIMO-OFDM System Using Pseudo Random Location of Fake Subcarrier, EMITTER International Journal of Engineering Technology, Vol. 4, No. 1, June 2016.
[8] Gainutdinov and S. Loginov, "Increasing information keamanan of a communication system with OFDM based on a discrete-nonlinear Duffing system with dynamic chaos," 2021 International Conference on Electrotechnical Complexes and Systems (ICOECS), 2021, pp. 249-252, doi: 10.1109/ICOECS52783.2021.9657260.
[9] T. Nazzal and H. Mukhtar, "Evaluation of Key-Based Physical Layer Keamanan Systems," 2021 4th International Conference on Signal Processing and Information Keamanan (ICSPIS), 2021, pp. 84-87, doi: 10.1109/ICSPIS53734.2021.9652423.
[10] Reşat, Mustafa Anıl, Murat Can Karakoç, and Serdar Özyurt. "Improving physical layer security in Alamouti OFDM systems with subcarrier coordinate interleaving." IET Communications 14.16 (2020): 2687-2693.
[11] J. Classen, M. Schulz, M. Hollick, Practical Covert Channels for WiFi Systems, IEEE Conference on Communications and Network Security (CNS), Florence, pp. 209-217, 2015.
[12] Y. Wu, P. C. Lan, P. C. Yeh, C. H. Lee, and C. M. Cheng, "Practical physical layer security schemes for MIMO-OFDM systems using precoding matrix indices," IEEE J. Sel. Areas in Commun., vol. 31, no. 9, pp. 1687-1700, Aug. 2013.
[13] H. Qin, Y. Sun, T. H. Chang, X. Chen, C. Y. Chi, M. Zhao, and J. Wang, "Power allocation and time-domain artificial noise design for wiretap OFDM with discrete inputs," IEEE Trans. Wireless Commun., vol. 12, no. 6, pp. 2717-2729, June 2013.
[14] N. Saadah, I. G. P. Astawa, and A. Sudarsono. Confidential data transmission using subcarrier randomization with rsa algorithm for synchronization on mimo-ofdm system. International Journal on Advanced Science, Engineering and Information Technology, 8(2):628– 638, 2018
[15] Sa'Adah, Nihayatus, I. Gede Puja Astawa, and Amang Sudarsono. "Asymmetric cryptography for synchronization on mimo-ofdm system." 2017 International Electronics Symposium on Engineering Technology and Applications (IES-ETA). IEEE, 2017.