Abstract: From the beginning, the importance of IoT device’s security was not considered as it should be. Now, this issue poses challenges for smart device manufacturers and software developers to improve their device’s reliability. This study used the combination between analytic network process methodology and Benefit-Cost-Risk (BCR a derived version of BCOR) Model. To evaluate and select the most appropriate encryption algorithms applied for IoT devices, this combination is very suitable: The strength of ANP approach, providing a mathematical and logical way to take decision without affection of human emotion, combined with BCR, a ranking tools model to find out the right decision. A lot of being-wearied-IoT-devices are still using unsecured connection such as Bluetooth or poor security encryption system. These are the gold mine for hacker to dig user’s private information. The most efficient method is applying more secure connection method using reliable encryption algorithm without losing the performance and cost. And among types of encryption algorithms, each of them has its own strength and weakness, it is not easy for IoT devices maker and programmers to choose the good algorithm to deploy on their device. The security requirements in this study are based on IoT device users and programmers point of view. Therefore, this study keeps well the objectivity and suggests a good viewpoint to evaluate encryption method for IoT device. This framework provides a useful, significant and comprehensive tool for IoT software developer, hardware manufacturers to solve the same or similar security problems. This research will be valuable for IoT devices manufactures and IoT devices software developers to find the most economical and efficient way to secure their devices.