A Lightweight Encryption Algorithm for RFID System

With the development trend of the Intelligent Internet of Things (IoT) society, the infrastructure of the IoT is increasing, and the use of RFID technology as the core of the IoT system is also more extensive. Strengthening the security of IoT infrastructure has become a top priority. Most of these IoT infrastructures are resource constrained, so lightweight encryption algorithms are used to ensure the communication security between IoT devices. This paper proposes a lightweight encryption algorithm named “SWLEA”. The data block length of the algorithm is 32-bit, and supports 32-bit key. The algorithm is mainly applicable to the system with RFID tag chip as the identifier chip.