关键词: 卫星网络, 组密钥管理, 组密钥协商, 身份认证, 三叉密钥树

Abstract: To overcome the problems of mobility and authentication in multicast communication of satellite network, this paper presents a group key management with ternary key tree based on ID authenticated. A key negotiation matrix is designed due to the multiplayer of satellite network, which regards the satellites of high orbit as group key negotiation sponsored nodes and set telluric control center as the third trusted party. Bilinear parings and ID authentication technique are employed in the key negotiation process, therefore the dishonest nodes can be detected and identified. A signature is proposed to ensure the authentication and integrality of the blind key tree. Performance analysis shows that the proposed scheme has strong security, less computation and communication cost.

Key words: satellite network, group key management, group key negotiation, ID authentication, ternary key tree