A context-aware cryptographic framework is proposed in this paper for protecting wireless communication networks using lightweight and post-quantum encryption. Fuzzy logic is used in the system to quickly assess channel quality, battery level, user’s movement and how sensitive the data is. Using these factors, it can pick the right sort of encryption automatically. Testing and analyzing the framework through modeling and simulation indicate efficient energies, speed and security are achieved by the framework. This new method supports forthcoming networks such as IoT, MANETs and 6G with high resistance to quantum threats.