Enhancing the security of the IoT LoraWAN architecture

The Internet of things (IoT) is invading our lives by connecting surrounding human things to the Internet. This allows a smarter and comfortable human living space. However, it exposes private and sensitive data as well as human appliances to attackers. Security solutions based on cryptography might solve these problems. However, these solutions need the use of encryption keys that must be managed securely and properly. We investigate, in this paper, existing key management protocols proposed for the Internet of things. Then, we propose a solution to enhance the security of the IoT loraWAN architecture. Our solution is inspired from an existing key management solution that uses proxy nodes to alleviate the computation in the constrained node side. We propose the use of a reputation system for proxy nodes selection which permits a reliable and attacks free security solution.