Sistem Digital Signature Untuk Verifikasi Dokumen Digital Menggunakan Mac Address Pada SHA-256 dan AES-128

Abstrak

The advancement of internet technology has drastically changed the way we communicate and share information, enabling the transmission of data in various formats such as audio, video, images, and files. However, this convenience also brings new challenges such as document forgery and the low authenticity of files. This research aims to develop a desktop application-based system capable of verifying the authenticity of digital documents by implementing digital signatures using MAC addresses on the AES-128 and SHA-256 cryptographic algorithms. The system is designed to perform document hashing and encryption processes, store encryption results in a database, and provide key recipients with access for decryption. The results of the research indicate that the system can perform encryption and decryption very well, as evidenced by the successful decryption of ciphertext and the retrieval of the original document verified by the user. Additionally, the system's performance was tested using the avalanche effect method, which showed an average of 50.94%, indicating a high level of security that is difficult for attackers to breach. Black-Box testing involving login, registration, document signing, and document verification scenarios also demonstrated that the system functions according to specifications and can handle core operations effectively. The system's success in ensuring the authenticity and integrity of digital documents provides an effective solution to the growing problem of document forgery in the digital age.