With growing interest and research towards building a connected world using IoT devices, security of these devices becomes a great concern. There are various methods available today to ensure secure exchange of information from and to these devices, most commonly used methods today ensure security between the device and the server it communicates with. The server usually can control these devices, but if the server itself is compromised, the safety of these devices is compromised as well. There can be instances where even the control of a server on certain devices can be of great threat. This is true for the devices which control opening and closing of doors, stoves or even electricity. Such devices must only be operated on the user's instructions and their security should not be governed by server security. In this work, we propose an encryption scheme to provide complete control to the owner of the device, which makes use of two cryptographic symmetric keys. These two keys are used to encrypt information exchange of device-server and user-device respectively.
A. Farhan S. and R., K. C., “End-to-End Encryption Scheme For IoT Devices Using Two Cryptographic Symmetric Keys”, International Journal of Control Theory and Applications (IJCTA), vol. 9, 20 vol., pp. 43-49, 2016.