INTEGRATION OF THE EdDSA ALGORITHM WITH MULTI-SIGNATURE IN A QR CODE-BASED DIGITAL SIGNATURE SYSTEM FOR ACADEMIC DOCUMENT VERIFICATION. artificial_intelligence_network_technology [Internet]. 2026 May 9 [cited 2026 May 11];8(1):18-25. Available from: https://journal.unismuh.ac.id/index.php/ainet/article/view/21082