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The purpose of this study is to identify the importance of using information technology for security, especially for supervision. The method used in this research is descriptive method, describing the function of using smart phones as a security tool. The results of this study that smart phones can be used as a security tool by using a cellphone camera as a surveillance camera and wireless computer network. This research was carried out with the results of analysis and experiments using previous references and supporting equipment. From the results of this study it can be found that smart phones can be utilized as security systems. Therefore the results of this study can be utilized by various parties or can be used as a reference in the use of technology and information.