Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí hóa hoc quốc tế đề tài : Secure protocols for data propagation and group communication in vehicular networks | Hsieh et al. EURASIP Journal on Wireless Communications and Networking 2011 2011 167 EURASIP Journal on . http content 20ii i i67 Wireless Communications and Networking a SpringerOpen Journal RESEARCH Open Access Secure protocols for data propagation and group communication in vehicular networks Meng-Yen Hsieh1 Hua-Yi Lin2 Chin-Feng Lai3 and Kuan-Ching Li1 Abstract Vehicular networks are organized with high-mobility vehicles which are a challenge to key agreement and secured communication among vehicles hence efficient cryptography schemes for lightweight ciphers are essential. Many security schemes for vehicular networks particularly take the secure propagation of traffic-related information into account. Group communication is desirable in vehicular networks while groups of friends drive the vehicles to travel together. In this study it is applied an asymmetric key mechanism and a group-based Elliptic Curve cryptograph to authenticate data propagation as also to individually secure group communication. The data propagation includes a flooding delay mechanism where each vehicle participant in the propagation calculates an individual delay for propagation. As groups of vehicles move on the roadway toward same destinations two alternative schemes of group key agreement in vehicle-to-vehicle and vehicle-to-infrastructure modes are proposed to secure group communication among the vehicles. Security analysis results present that the proposed schemes can effectively prevent malicious vehicle from participating in vehicular communications. Evaluation results show that the propagation delay mechanism can effectively reduce broadcast collision and the delay results of the group key agreement schemes are acceptable. Keywords vehicle group communication elliptic curve 1. Introduction Secure data transmission in vehicle ad hoc networks VANETs has been an important issue. The disclosure environments with wireless connection are vulnerable to eavesdrop
