Modern applications incorporate various control devices and sensors that connect to the Internet, collectively known as the Internet of Things (IoT). These innovative technologies have garnered significant research attention due to their extensive applications and rapid development. The transmission of private and sensitive data between IoT devices demands stringent data confidentiality measures. Traditional cryptographic algorithms, which involve complex mathematical operations and numerous computational cycles, result in high memory usage and energy consumption, rendering them unsuitable for resource-constrained devices. To address this issue, a lightweight and efficient algorithm called NLBCIT has been proposed. This algorithm is designed to provide robust data protection while meeting the limitations of IoT devices.Simple math techniques like XNOR, swapping, shifting, and XOR are used by NLBCIT to encrypt 64-bit data with a 64-bit key.It incorporates features from both SP Network and Feistel architectures to enhance diffusion and confusion, thereby strengthening data security.The NLBCIT algorithm is simulated using FELICS and MATLAB. This approach uses a variety of data types, including text and images. Simulations show that the proposed technique is better in many aspects, including memory usage, security, efficiency, and fewer cycles (both for encryption and decryption).