This randomized controlled study evaluated the effect of an online awareness training program on nursing students' awareness of digital data security and their attitudes toward data management in digital health environments. Nursing students were randomly assigned to an intervention group or a control group. The intervention group received online training on digital health data security and data management, while the control group did not receive the training during the study period. Participants completed the Digital Data Security Awareness Scale and the Data Management in the Digital Health Environment Scale. The study aimed to determine whether the awareness training improved nursing students' digital data security awareness and attitudes toward data management in digital health environments.