Implicit Lightweight Proxy Based Key Agreement for the Internet of Things (ILPKA)

Due to the heterogeneity of devices available in the Internet of Things and the limitations of the resources connected to it, simplifying and lightening the algorithms used in the Internet of Things is an interesting area of study for researchers. One of the critical areas in the Internet of Things is the secret key establishment in communicating parties to make secure communication. The importance of communication security, on the one hand, and the need to create lightweight algorithms in the Internet of Things, on the other hand, have created an additional incentive to establish a lightweight key agreement protocol. Therefore, we present a lightweight method for key agreement in this article, while specifying the requirements of an appropriate key agreement protocol. To reduce the communication overhead, we implicitly perform operations of establishing the agreed key by sending a message. The results of analyzing the proposed method show a relative decrease compared to other methods concerning the number of main operations. Furthermore, the evaluation of the proposed method using formal tools indicates the success of establishing the agreed key, authentication of the communication parties, and also resistance to the relevant attacks.