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Monitoring the activities of the surrounding area using a wireless sensor network is very important to help support human work such as bridge surveillance, agricultural supervision, and others. Wireless sensor networks work in real time requiring a large amount of power source. In order for the wireless sensor network to work optimally and last, it is necessary to minimize the working energy of communication protocols on wireless sensor networks as in this study is a link layer protocol used for savings in the use of resources in wireless sensor network transmission systems. In large-scale use, wireless sensor networks use multiple nodes. In order to use less energy for the most efficient use of wireless sensor networks with many nodes, the most appropriate way to perform a clustering system that divides nodes into groups with each cluster there is a head cluster that serves as a data aggregation in each node member on their respective clusters. In this study the clustering system used the LEACH protocol. If a wireless sensor network uses multiple nodes, it is vulnerable to attack. To provide security in the wireless sensor network used Tiny Sec protocol based Tiny OS. So in performing energy minimization wireless sensor network protocol can also consider the security aspects of the sensor network. The parameters analyzed in this study are the relationship of the use of working energy with the lifetime of the sensor network. The data found in this study is with the addition of Tiny Sec, the power consumption and data used become minimal and the working energy that is able to survive by using 100 nodes and working energy 2 J then the maximum usage time is about 500 seconds. [ABSTRACT FROM AUTHOR]