Perancangan dan Evaluasi Protokol Keamanan untuk Ijazah dengan Integrasi Digital Watermarking Berbasis AES 128 dan Analisis Forensik Statis

Abstract

Higher education diplomas are critical official documents that are often subject to forgery and misuse. In the digital era, ensuring the authenticity and integrity of such documents presents increasing challenges, requiring robust security mechanisms. This paper proposes a security protocol for digital diploma documents by integrating digital watermarking and static digital forensic analysis, supported by cryptography and steganography. The watermark contains encrypted authentication information using the AES-128 algorithm in CBC mode, which is embedded into the digital document and serves as its identifier. A static forensic analysis is then applied to detect and identify potential modifications or tampering. The proposed method is evaluated based on its manipulation detection success rate, authenticity verification accuracy, and watermark resilience, tested through three primary metrics: robustness, imperceptibility, and capacity. The protocol is validated through four scenarios: (1) original diploma document, (2) manipulated document, (3) re-scanned document, and (4) duplicated original document. Experimental results demonstrate that the integration of watermarking and forensic techniques enhances document protection, offering a reliable solution for securing digital diploma documents within academic administrative systems.