Kohesi: Jurnal Sains dan Teknologi

Articles

Vol. 10 No. 7 (2025): Kohesi: Jurnal Sains dan Teknologi, ISSN 3025-1311

IMPLEMENTASI PROTOKOL TRANSMISI DATA AKUSTIK ZERO-INSTALL BERBASIS WEB AUDIO API DAN WEBASSEMBLY UNTUK KOMUNIKASI PADA LINGKUNGAN AIR-GAPPED

Submitted
December 12, 2025
Published
2025-12-12

Abstract

Lingkungan sistem terisolasi (air-gapped) pada infrastruktur kritis memerlukan metode transfer data yang aman tanpa melanggar prinsip isolasi fisik. Metode konvensional seperti media penyimpanan USB rentan terhadap malware, sedangkan solusi transmisi akustik yang ada umumnya berbasis aplikasi natif yang memerlukan instalasi, sehingga sering kali terkendala kebijakan keamanan yang ketat. Penelitian ini bertujuan mengimplementasikan protokol transmisi data akustik berbasis Web Audio API dan WebAssembly (WASM) yang memungkinkan komunikasi teks terenkripsi secara real-time melalui peramban web tanpa memerlukan instalasi perangkat lunak (zero-install). Sistem dikembangkan menggunakan pustaka ggwave untuk modulasi sinyal Frequency Shift Keying (FSK) dan diuji kinerjanya berdasarkan parameter latensi, integritas data, dan jarak fisik. Hasil pengujian menunjukkan bahwa sistem mampu beroperasi secara lintas platform (cross-platform) dengan efektif. Protokol transmisi cepat (fastest protocol) menawarkan latensi 40% lebih rendah dibandingkan protokol standar, namun mengalami peningkatan tingkat kesalahan karakter (Character Error Rate) yang signifikan pada kondisi bising. Sistem terbukti bekerja optimal sebagai metode komunikasi jarak dekat (near-field) dengan tingkat keberhasilan 100% pada jarak di bawah 50 cm. Penelitian ini menyimpulkan bahwa pendekatan berbasis web valid sebagai solusi jembatan komunikasi praktis dan aman untuk lingkungan air-gapped.

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