| 抗动态攻击的秘密共享方案 |
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| 引用本文： | 李虓,何明星. 抗动态攻击的秘密共享方案[J]. 西华大学学报(自然科学版), 2004, 0(Z1) |
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| 作者姓名： | 李虓 何明星 |
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| 作者单位： | 西华大学计算机与数理学院 四川成都610039(李虓)，西华大学计算机与数理学院 四川成都610039(何明星) |
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| 摘 要： | 文章提出了一个可抗动态攻击的门限密钥共享方案 ,采用了密钥链和身份链 ,实现了系统密钥的自动更新和参与者的子密钥自动更新。该方案更新的密钥链是后向安全的 ,参与者提供的身份链也是后向安全的。方案的门限值在密钥更新后会发生改变 ,增加了攻击者对本方案的攻击的难度 ,提高了本方案的安全性。本方案还可以检测到参与者以及Dealer的欺诈行为
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| 关 键 词： | 秘密共享 动态攻击 Hash链 后向安全 |
A secret Sharing Scheme Against Dynamic Attac |
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| KLI Xiao,HE Ming-xing. A secret Sharing Scheme Against Dynamic Attac[J]. Journal of Xihua University(Natural Science Edition), 2004, 0(Z1) |
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| Authors: | KLI Xiao HE Ming-xing |
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| Abstract: | In this paper, a secret sharing scheme against dynamic attack is proposed. The proposed scheme employs key chain and identity chain, the system's key and participations' sharing key can be automatic refreshed. Both the refreshed key chain and the identity chain are of backward security. After the system's key being refreshed, the value of threshold will be modified. For the dynamic attacker, the difficulty of attacking to the system is increased. Thus, the security of the system is enhanced. The proposed scheme can detect cheaters both the participants and the dealer. |
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| Keywords: | secret sharing dynamic attack hash chain backward security |
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