ANALISIS KEAMANAN PESAN PENDEK WHATSAPP MENGGUNAKAN KOMBINASI ALGORITMA RSA DAN STEGANOGRAFI LSB PADA MEDIA GAMBAR
Bilah Samping Artikel
Isi Artikel Utama
Abstrak
ABSTRACT
Short text messages on WhatsApp often contain sensitiveinformation despite their brevity. This research implements RSA cryptography and LSB steganography to secure WhatsApp messages embedded in images. Five WhatsAppscreenshots were used as test data. The RSA algorithm (2048-bit) encrypts text messages, while LSB hides encrypted data in image pixels. Analysis includes encryption time, PSNR, and security assessment. Results show PSNR averaging 48.6 dB with encryption time of 152 ms per message. The RSA+LSBcombination provides dual-layer security suitable forprotecting short personal messages on messaging platforms.
Keywords: WhatsApp Security, RSA Cryptography, LSBSteganography, Image Steganography, Message Encryption
Abstrak
ABSTRAK
Pesan teks pendek di WhatsApp sering mengandung informasisensitif meskipun singkat. Penelitian inimengimplementasikan kriptografi RSA dan steganografi LSB untuk mengamankan pesan WhatsApp dalam gambar. Limatangkapan layar WhatsApp digunakan sebagai data uji.Algoritma RSA (2048-bit) mengenkripsi pesan teks, sementara LSB menyembunyikan data terenkripsi dalampiksel gambar. Analisis meliputi waktu enkripsi, PSNR, dan penilaian keamanan. Hasil menunjukkan PSNR rata-rata 48,6 dB dengan waktu enkripsi 152 ms per pesan. KombinasiRSA+LSB memberikan keamanan berlapis yang cocok untukmelindungi pesan pribadi pendek di platform pesan.
Kata kunci: Keamanan WhatsApp, Kriptografi RSA,Steganografi LSB, Steganografi Gambar, Enkripsi Pesan
Rincian Artikel
Artikel ini berlisensi Creative Commons Attribution 4.0 International License.
Referensi
[1] A. H. Kridalaksana, A. Y. Rangan, and A. Ansharie, “Audio Data Encryption Using RSA Cryptography Method,” Sebatik, vol. 17, no. 1, pp. 6–10, 2021, doi: 10.46984/sebatik.v17i1.79.
[2] M. Al Kahfi, M. Auva, D. P. Putra, C. D. P. B. Ginting, and A. Fauzi, “SUPER ENKRIPSI DATA TEKS : KOMBINASI ALGORITMA AFFINE CIPHER, ELGAMAL, DAN RSA UNTUK PERLINDUNGAN OPTIMAL,” J. Sist. Inf. Kaputama, vol. 9, no. 1, pp. 20–34, Jan. 2025, doi: 10.59697/JSIK.V9I1.949.
[3] A. Fauzi, S. Ramadani, H. Khair, and A. M. H. Pardede, “Integration Of Data Filtering With Hybrid RSA Deep Learning Algorithm For Iot Data Security And Classification.,” J. Theor. Appl. Inf. Technol., vol. 103, no. 22, 2025.
[4] H. Small et al., “Small Private Exponent Attacks on RSA Using Continued Fractions and Multicore Systems,” Symmetry 2022, Vol. 14, Page 1897, vol. 14, no. 9, p. 1897, Sep. 2022, doi: 10.3390/sym14091897.
[5] A. Hakim, Zhya Anggraini, Dilla Sillfani, Renika Ayuni, and A. Fauzi, “Penerapan Super Enkripsi Hill Cipher Dan Rsa Untuk Pengamanan Data File Audio Mp3,” J. Sist. Inf. Kaputama, vol. 9, no. 1, pp. 55–64, 2025, doi: 10.59697/jsik.v9i1.959.
[6] A. Fauzi, “Asymmetric Cryptography: A Technical Analysis Of The RSA And Elgamal Algorithms,” 2025th ed., no. 27, Medan: PT. Pustaka Pratama, 2025, p. 86. [Online]. Available: https://store.pustakapratama.com/product/asymmetric-cryptography-a-technical-analysis-of-the-rsa-and-elgamal-algorithms/
[7] M. Al Kahfi, M. Auva, D. P. Putra, C. D. P. B. Ginting, and A. Fauzi, “Super Text Data Encryption: Combination of Affine Cipher, Elgamal, and RSA Algorithms for Optimal Protection,” J. Sist. Inf. Kaputama, vol. 9, no. 1, pp. 20–34, Jan. 2025, doi: 10.59697/JSIK.V9I1.949.
[8] S. Fatima, T. Rehman, M. Fatima, S. Khan, and M. A. Ali, “Comparative Analysis of Aes and Rsa Algorithms for Data Security in Cloud Computing,” Eng. Proc. 2022, Vol. 20, Page 14, vol. 20, no. 1, p. 14, Jul. 2022, doi: 10.3390/engproc2022020014.
[9] D. J. J. Tom, D. N. P. Anebo, D. B. A. Onyekwelu, A. Wilfred, and R. E. Eyo, “Quantum Computers and Algorithms: A Threat to Classical Cryptographic Systems,” Int. J. Eng. Adv. Technol., vol. 12, no. 5, pp. 25–38, 2023, doi: 10.35940/ijeat.e4153.0612523.
[10] M. Liu, K. Kultinov, and C. Wang, “The Implementations and Applications of Elliptic Curve Cryptography,” Epic Ser. Comput., vol. 98, pp. 89–102, 2024, doi: 10.29007/gbsb.
[11] M. Alshar’E, S. Alzu’bi, A. Al-Haraizah, H. A. Alkhazaleh, M. Jawarneh, and M. R. Al Nasar, “Elliptic curve cryptography based light weight technique for information security,” Bull. Electr. Eng. Informatics, vol. 14, no. 3, pp. 2300–2308, 2025, doi: 10.11591/eei.v14i3.8587.
[12] H. D. Saragih, Elpridayanti, Dodi Siregar, “Implementasi Penyisipan Pesan Teks Terenkripsi Menggunakan Kriptografi ElGamal pada Citra Digital Menggunakan Steganogarafi LSB | Jurnal SAINTIKOM (Jurnal Sains Manajemen Informatika dan Komputer).” Accessed: Apr. 24, 2025. [Online]. Available: https://ojs.trigunadharma.ac.id/index.php/jis/article/view/8755
[13] R. Imanda, H. Nasution, A. Fauzi, and H. Khair, “Hybrid Cryptosystem Algorithm Vigenere Cipher and Base64 for Text Message Security Utilizing Least Significant Bit (LSB) Steganography as Insert into Image,” J. Artif. Intell. Eng. Appl., vol. 2, no. 3, pp. 89–98, jun. 2023, doi: 10.59934/JAIEA.V2I3.201.