A Survey of Various Lightweight Cryptography Block ciphers for IoT devices

Internet of things (IoT) helps in creating connections among dissimilar things present in a heterogeneous environment and provides better services to end users via real-time data processing, communication, and visualization. Rapidly growth in IoT devices, connected to the internet, poses a huge range of challenges like heterogeneity and scalability of devices, security of IoT generated data and so on. Developing new cryptographic algorithms and selecting appropriate ciphers for providing confidentiality, integrity, authenticity and non-repudiation as well as satisfying the device constraints are needed in today's scenario. The characteristics of each block cipher are closely related to a specific setting and cannot be directly transferred to other applications. This paper presents various challenges faced by researchers in finding suitable light weight cryptography (LWC) ciphers for their specific needs and applications. The key contribution of this paper is to provide a detailed overview of existing light weight block ciphers in terms of various parameters. Moreover, this paper describes the basic measures required to combine different ciphers together to form a hybrid cryptosystem for securing IoT devices.