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The widespread and growing interest in the Internet of Things (IoT) may be attributed to its usefulness in many different fields. Physical settings are probed for data,which is then transferred via linked networks. There are several hurdles to overcome when putting IoT into practice, frommanaging server infrastructure to coordinating the use of tiny sensors.When it comes to deploying IoT, everyone agrees that security is the biggest issue. This is due to the fact that a large number of IoT devices exist in the physicalworld and thatmany of themhave constrained resources such as electricity,memory, processing power, and square footage. This research intends to analyse resource-constrained IoT devices, including RFID tags, sensors, and smart cards, and the issues involved with protecting them in such restricted circumstances. Using lightweight cryptography, the information sent between these gadgets may be secured. In order to provide a holistic picture, this research evaluates and contrasts well-known algorithms based on their implementation cost, hardware/software efficiency, and attack resistance features.We also emphasised how essential lightweight encryption is for striking a good cost-to-performance-to-security ratio. [ABSTRACT FROM AUTHOR]