VERISIGNDOC: DIGITAL SIGNATURE VERIFICATION SYSTEM FOR OFFICIAL DOCUMENTS

Abstract

The widespread adoption of digital documents in academic, governmental, and organisational environments has introduced significant challenges related to document authenticity, integrity, and trust. Conventional document approval processes often rely on manual signing or unsecured signature images, which are vulnerable to forgery, duplication, and unauthorised modification, underscoring the need for a secure, reliable digital document verification mechanism. This study presents VeriSignDoc, a web-based digital signature verification system designed to ensure the authenticity and integrity of official documents using cryptographic techniques based on Public Key Infrastructure (PKI). The system enables authorised users to digitally sign documents, while recipients can verify the validity of digital signatures through a verification interface without requiring prior registration. A usability evaluation and user acceptance testing were conducted with 30 participants from diverse academic backgrounds, who performed task-based activities, including document upload, digital signing, and document verification, followed by a structured Likert-scale questionnaire to assess usability, system functionality, and user interface quality. The findings indicate high levels of user satisfaction, ease of use, and functional reliability, with most participants agreeing that the system workflow was simple, verification results were clear and understandable, and the interface appeared professional and trustworthy. Overall, the results demonstrate that VeriSignDoc provides a practical, low-cost, and user-friendly solution for enhancing trust in digital document handling and verification processes.