6LoWPAN, a technology for allowing the deployment of IPv6 on Low Power and Lossy Networks enables interoperability and user-friendliness when establishing applications related to the highly popular trend of Internet of Things. In this paper, we investigate the impact of including a low cost security solution into the communication scheme on latency, power and memory requirements. The measurements demonstrate that this impact is acceptable for most applications. They also show that the impact drastically decreases when the number of transmitted messages decreases or the number of hops increases.