The Internet of Things (IoT) system makes it possible for different gadgets to connect to each other and send and receive data without any problems. But it’s not easy to make sure that the data being sent and received within this structure is safe and correct. A Lightweight Authenticated Key Management Mechanism (LAKMM) is suggested as a way to solve this problem. The goal of LAKMM is to improve the security of data transfer in IoT settings while reducing processing waste and resource use, which are important factors for IoT devices that don’t have a lot of resources. LAKMM’s most important parts are its fast key creation, sharing, and identification systems that are designed to work in IoT settings. LAKMM finds a good mix between security and speed by using small cryptographic primitives and speeded-up protocols. It also protects against common attacks like eavesdropping, hacking, and repeat attacks, making sure that the data being sent is kept private and secure. LAKMM also has features for dynamic key changes and revocations, which are important for keeping things safe in IoT settings where devices are always joining and leaving the network. We show that LAKMM works well at offering strong security with little extra work for computers by simulating and analyzing it. So, LAKMM looks like a good way to improve the security of data transfer in the IoT framework.