Nowadays the Internet of Things(IoT) is a buzzword. In numerous fields, we are using it. So, the security and privacy of the Internet of Things are very important for today’s mankind. In this paper, we have analyzed many Internet of Things systems. We found various vulnerabilities and security faults in some systems. We found various previous works and models to solve the security issues. But those are not enough. This paper has an aim to establish a new model that may be applied to IoT systems to acquire more security. Finally, we have proposed a model for secure IoT systems. We have analyzed that model from various perspectives and found that it may be a solution to the security threats for IoT.