An Efficient Privacy-Preserving Scheme for Wireless Link Layer Security

In this paper, we propose an efficient privacy-preserving scheme for secure packet transmission at wireless link layer. The proposed scheme is constructed by using hash values in reverse hash chains as interface identifiers. It can successfully and efficiently resist the Media Access Control (MAC) address based attacks, such as flow tracking and traffic analysis, which are launched by either outside or even inside attackers. In addition, some optimization techniques are also introduced to further improve the efficiency of the proposed scheme. The extensive analysis and simulations demonstrate the enhanced security and efficiency of the proposed scheme.