The Behavioral-Cognitive Internet Security Questionnaire (BCISQ) is a reliable and validated measurement instrument that examines risky online behavior and security awareness of information-communication system users. It consists of four short subscales that measure the behavioral and cognitive aspects of a risky online behavior, including a simulation scale that measures an actual risky online behavior. previous research on a Croatian sample of students shows a satisfactory construct validity and reliability of the English and Croatian BCISQ versions. The aim of our research is to cross-validate the BCISQ Slovenian version and to test the questionnaire for psychometric properties among Slovenian students. The research is conducted on Slovenian students (N = 151; Mage = 21.68; SD = 3.12). During their regular class, they fill in online BCISQ in the Slovenian language. The results show a good construct validity of BCISQ (CFI = 0.99, TLI = 0.99, RMSEA = 0.01) and a relatively satisfactory internal consistency (Cronbach a = 0.42 - 0.88) as well as test-retest reliability (ICC = 0.415 - 0.878). Future research about the information security can use BCISQ as a basic tool for reliable evaluation of a risky online behavior and security awareness among internet users.