IoT Security: Implementation of Xtea, Simon/Speck Lightweight Block Ciphers

─ The current technological advancements in the fields of internet, mobile devices, and machine to machine (M2M) communication can be regarded as the initial phase of the Internet of Things (IoT). As the IoT expands, it will integrate diverse technologies to enable novel applications by connecting various physical objects. In such an environment, it has become crucial to safeguard all the information. This research paper focuses on implementing lightweight encryption algorithms, such as Xtea, Simon, and Speck, using an ESP8266 microcontroller and the Arduino IDE. Additionally, the paper presents a performance analysis of these algorithms based on their computational cost and memory requirements. Thus, this study provides insights into the effectiveness of these three lightweight encryption algorithms for securing IoT devices.