| 摘要: |
| 对Staddon等人提出的self-healing密钥分发方案作了3个方面的改进:第一,提出了一种更高效的无条件安全的long-lived方案取代基于计算安全的long-lived方案,降低了计算复杂度和通信复杂度;第二,增强了用户恢复合理密钥的能力,使得在某个特殊场景中,用户可以恢复出合理密钥;第三,降低了广播消息的次数和存储在用户端的私人密钥数目. |
| 关键词: self-healing 抗t-合谋攻击 多项式 群组通信 密钥管理 |
| DOI： |
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| 基金项目:Supported by the National Basic Research Program of China under Grant No.2007CB807902 (国家重点基础研究发展计划(973)); the National High-Tech Research and Development Plan of China under Grant No.2006AA01Z423 (国家高技术研究发展计划(863)) |
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| Efficient Long-Lived Self-Healing Key Distribution Scheme |
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LI Hui,WU Chuan-Kun
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| Abstract: |
| Some improvements on three aspects have been made for the self-healing key distribution scheme proposed by Staddon et al. First, an efficient long-lived scheme which is unconditional secure instead of computational secure is proposed to lower the cost of computation and communication. Second, the capability of session key recovery of members is strengthened, which enables the members to recover some reasonable session keys in a certain special situation. Third, the number of broadcast messages and that of personal keys stored in users’ memory are reduced. |
| Key words: self-healing t-collusion resistant polynomial group communication key management |
