Unique Group Key Establishment Scheme for Internet of Thing

This paper is part of a research which the authors are carrying out for designing a secured transmission for IoT (Internet of Things). In this scenario group key plays a major role as vehicles would be grouped according to their size. A unique group key establishment system has been proposed where High Definition images(HDRI) are taken as a group key, the images are first watermarked using DWT and then encrypted and are assigned to each group. To access a device(source) of a group the key stored for the source is transmitted to the target trying to establish a connection. The target would be having the decryption algorithm where the image would be decrypted and the watermarked image is extracted and matched with the stored image, once a match is found the connection would be established between the source and the target but to access the device of the source target would again have to establish a simple device key authentication after which a complete connectivity would be possible. The proposed system is unique as there is no decryption key and uses images for authentication. It is the future of a secured IoT and networking as a whole. To check the robustness of the system various attacks including Man in the middle have been tried and quality of the extracted watermarked images has also been checked and it has been observed that the quality remains good even after transmitting the images in a linear form over the network.