Abstract
摘要: 为解决在空间网络中实施集中式密钥管理困难以及维护公钥证书开销过大等问题，论文设计了一种基于身份的分布式密钥管理方案。结合空间网络特点，给出了分布式私钥生成中心的构建方法。并利用Boneh和Franklin提出的基于身份的公钥加密体制，设计了私钥更新、主密钥分量更新和会话密钥协商等策略。分析和仿真验证，该方案能满足安全要求，具有较好的扩展性。 关键词: 空间网络; 基于身份的密码体制; 门限机制; 密钥管理
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