Siswanto B, Surgawiwaha D. IMPLEMENTATION OF DIGITAL SIGNATURE FOR RESEARCH PAPER LEGALIZATION, AUTHENTICATION AND RATIFICATION CASE STUDY: TRAINING CENTER FOR NATIONAL CYBER AND CRYPTO AGENCY. pijss [Internet]. 2019 Oct. 22 [cited 2024 May 3];5(2):1003-12. Available from: https://www.grdspublishing.org/index.php/people/article/view/934