Reciprocity Enhancement in V2V Key Generation System by using HPK Method

Vehicle to vehicle (V2V) communication is a current technological innovation that allows two vehicles to communicate with each other through ad-hoc networks. However, security issues in ad-hoc networks are very high, allowing attacks to take control of vehicles or stealing confidential messages by irresponsible third parties. Therefore, a high security system is needed in ad-hoc networks. The implementation of secret key generation by utilizing Received Signal Strength (RSS) between two vehicles can overcome this problem by generating random key bits. We use HPK (Hybrid Polynomial Regression and Kalman Filter) method to improve RSS correlation and Modified Multi-Bit (MMB) quantization combined with Level Crossing algorithm. Testing is conducted by comparing the performance between HPK method that proposed with another method to increase the reciprocity. The test results show that the HPK method and the combination of proposed quantization can increase the KGR value with a low KDR value. In addition, the secret key bits generated can meet the NIST statistical test.