Secure Device-to-Device Authentication in Mobile Multi-hop Networks.

In order to deal with drastically increasing mobile traffic these days, device to device connection (D2D) which provides infra-connection's off-loading is getting a lot of attention. However, we observed that most of the current D2D protocols such as Bluetooth and Wi-Fi Direct are not scalable, and vulnerable to main-in-the-middle (MITM) and replay attacks in mobile multi-hop networks. In this paper, we propose novel D2D authentication protocols with a secure initial key establishment using ciphertext-policy attribute-based encryption(CP-ABE) to solve this problem. By exploiting CP-ABE, the proposed scheme allows the communicating parties to mutually authenticate each other and derive the link key in an expressive and secure way in the multi-hop network environment. According to the analysis results, the proposed scheme is secure against MITM and replay attacks in the D2D mobile multi-hop networks.