The swift development of vehicular networks has transformed contemporary transportation systems, positioning the Internet of Vehicles (IoV) as a pivotal infrastructure for intelligent mobility solutions. These networks facilitate communication among vehicles, enabling the exchange of crucial information while enhancing roadway safety and traffic efficiency. Nonetheless, the extensive expansion of vehicular networks has introduced intricate challenges surrounding the intersection of security requirements and performance constraints. To address these issues, this study integrates Elliptic Curve Cryptography (ECC) with chaotic map-based encryption to secure vehicular communications. A resource-aware security system is devised in this research, dynamically adapting encryption strength according to vehicle capabilities, and implementing real-time monitoring of latency and battery consumption. Moreover, a realistic simulation environment is developed to validate the hybrid cryptographic framework, thereby ensuring optimal security while satisfying performance requirements for vehicular communications.