Abstract
With the evolution of IoT embedded devices and their broad application, security has become crucial. Security comes at a cost to these limited devices in terms of energy. However, evaluating security cost is not straightforward, as there are many factors involved, such as the employed security services and type of hardware. This research studies the impact of duty cycle protocols on security cost in IoT embedded devices. It begins by evaluating the cost of security on a per-packet basis, and then evaluates how duty cycle protocols could affect security cost. The research demonstrates the relationship between duty cycle protocols and security cost, which could be a source of confusion when measuring the actual security cost in a real scenario.