关键词: 认知无线电, 容迟网络, 频谱, 密钥交换, 安全

Abstract: The communication is opportunistic in delay-tolerant network, and the nodes spend limited time in sending data. The network performance will become worse, if the current protocols on key exchange are applied to secure the channel. The reason is that there are multiple interactions for getting node identity and key material among nodes. To solve the problem, the authors put forward a new scheme — non-interactive key exchange scheme based on cognitive radio (CRNIKES). Nodes consulted the shared key with the technologies of identification based on spectrum and the bilinear pairing without interaction in networks. The efficiency of scheme is O(TC), and the TC is the time for spectrum cognitive. Since the TC is constant and the efficiency is independent of the size of network, this scheme is efficient and adapts to the delay-tolerant network.

Key words: cognitive radio, delay-tolerant network, frequency spectrum, key exchange, security