Development and Evaluation of a Desktop Academic Data Encryption Application Using AES with Password-Based Key Management

Muhammad Wahyu Rizqi Pratama; Haris Yuana; Fatikhatul Trisna Ardinansyah

doi:10.59934/jaiea.v5i3.2374

Authors

Muhammad Wahyu Rizqi Pratama UNIVERSITAS ISLAM BALITAR
Haris Yuana
Fatikhatul Trisna Ardinansyah

DOI:

https://doi.org/10.59934/jaiea.v5i3.2374

Keywords:

AES, PBKDF2, Academic Data Security, Cryptographic Performance, Pondok Pesantren Nur Rohman

Abstract

This study evaluates a desktop-based academic data security application integrating the Advanced Encryption Standard (AES) and Password-Based Key Derivation Function 2 (PBKDF2) at Pondok Pesantren Nur Rohman. Using an experimental approach, three AES key lengths (128-bit, 192-bit, and 256-bit) were tested against 10 authentic academic files to assess computational performance and cryptographic strength. The results show that AES-128 achieves the fastest speed with a throughput of 57.84–65.00 MB/s, while AES-256 requires the longest processing time due to its 14 internal rounds. Regarding security, all variations exhibit ideal mathematical resilience: ciphertext entropy ranges tightly between 7.9988 and 7.9999 (near absolute randomness), and avalanche effect percentages remain stable between 49.85% and 50.19%. Furthermore, PBKDF2 successfully mitigates brute-force vulnerabilities by mapping passwords into precise hexadecimal keys. The process introduces a minimal, constant file size overhead of exactly 64 bytes (Salt, IV, and padding). Hardware utilization is exceptionally efficient, recording low CPU usage (0.1%–0.2%) and stable RAM allocation (53%–54%). In conclusion, the system delivers an optimal equilibrium between high-level data protection and local hardware efficiency.

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