<![CDATA[The National Data Center (PDN) is a vital infrastructure that is vulnerable to various cybersecurity threats, including ransomware. This study aims to measure the improvement of students’ knowledge regarding cybersecurity after participating in a webinar-based educational activity. The research employed a quasi- experimental method with a one-group pre-test–post-test design involving 50 students from two universities. The research instrument consisted of pre-test and post-test questions administered before and after the webinar. The results showed a significant improvement, with the average pre-test score of 52.5 increasing to 85.3 in the post- test, indicating a gain of 32.8 points. In addition, the number of participants achieving perfect scores increased from 3 to 11, and almost all participants experienced score improvements. These findings indicate that webinars are effective in enhancing students’ knowledge of cybersecurity, particularly ransomware threats to the PDN. ]]>
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