TTEA: Designing a Quantum-Ready and Energy-Conscious Encryption Model for Secure IoT Environments

The rapid expansion of the Internet of Things (IoT) represents important security challenges, especially for resources limited. Conventional light encryption methods such as a small encryption algorithm (TEA) often suffer from vulnerability to key and differential attacks and at the same time store high computing and energy costs. This paper represents a two-stage encryption approach (TTEA), a new cryptographic framework designed to increase both safety and efficiency in IoT communication. TTEA employs S-Boxs of 20 × 20 non-linear bits to achieve high non-linearity and low differential uniformity, along with an adaptive programming mechanism of keys, which dynamically modifies encryption complexity based on the availability of device-what is ideal for IoT-controlled battery systems. The platform rating, such as Arduino R3, ESP32 and Raspberry Pi, shows that TTEA overcomes existing methods, offers 15-20% faster encryption speed, 40% lower memory and reduced energy consumption compared to tea and other algorithms. Safety analyzes confirm the robustness of TTEA, reach an avalanche effect of 48.5% and higher entropy than traditional approaches. In addition, TTEA is effectively modified in large IoT networks, reducing the latency of multi-hop by 40%. The real world deployment in intelligent houses, industrial Internet, and healthcare shows that TTEA maintains high performance in networks with more than 200 devices and provides rapid encryption with minimal direction. Future works will explore the integration of advanced cryptographic techniques that will face emerging threats. TTEA appears as a safe, energy-efficient solution for protecting IoT applications in a dynamic environment.