Abstract
In last decade, due to increase in Information and communication technology (ICT), the era of smart things evolved at exponential rate. Internet of things (IoT) is one of the promising technologies related to smart things. The things are used to communicate as well as take decision based on convinced processing. Things that communicate in IoT belong to different users, which call for a concern on security and privacy of data from multiple users. One of major contribution to the advance of IoT is security. Lightweight security algorithms are apt for IoT due to the limited power and memory available with things. This research paper focuses on various existing symmetric and asymmetric lightweight solutions for IoT. This research paper also provides a detailed analysis of the existing lightweight algorithms on the basis of key size, block size, number of rounds, and attacks possible. Later, on the basis of the comparison carried out, this research paper identifies the research problems in IoT.
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