The development of digital technology has driven a shift in payment systems from cash to non-cash methods that are more efficient and practical. In the pesantren environment, the use of electronic money through the Katalis Barokah application represents an innovation to facilitate transactions between students (santri) and their parents (wali santri). However, in its implementation, there are still issues related to security and ease of use that may affect user satisfaction. This study aims to analyze and determine the effect of security and ease of use on the satisfaction of wali santri at Pondok Pesantren Salafiyah Abu Zairi Bondowoso. This research employs a quantitative approach with an associative (correlational) method. The sample was selected using purposive sampling, involving 177 respondents. Data were collected through questionnaires, observation, and documentation. Hypothesis testing was conducted using multiple linear regression analysis. The results show that (1) security has a significant effect on wali santri satisfaction, (2) ease of use has a significant effect on wali santri satisfaction, and (3) security and ease of use simultaneously have a significant effect on wali santri satisfaction.
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