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| 基于单向函数的动态密钥分存方案 |
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刘焕平1,2, 胡铭曾2, 方滨兴2, 杨义先3
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1.哈尔滨师范大学,信息科学系,黑龙江,哈尔滨,150080;2.哈尔滨工业大学,计算机科学与技术学院,黑龙江,哈尔滨,150001;3.北京邮电大学,信息安全中心,北京,100876
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| 摘要: |
| 给出了一个基于单向函数的动态(t,n)-门限方案,它具有下述特点:(1) 系统在更新系统密钥时,无须更改每个成员的子密钥;(2) 当某个成员的子密钥泄密时,系统只需为该成员重新分配子密钥而不必更改其他成员的子密钥;(3) 当有新成员加入时,系统只需为新成员分配一个子密钥,而其他成员不受任何影响;(4) 子密钥可无限制地多次使用;(5) 只需公开n+1个信息(在需要确认欺骗者时需公开2n+1个);(6) 恢复系统密钥时,采用并行过程. |
| 关键词: 数据安全 密码学 密钥分存方案 单向函数 |
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| 基金项目:黑龙江省科委基金资助项目(G99A10-3);哈尔滨师范大学杰出青年基金资助项目 |
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| A Dynamic Secret Sharing Scheme Based on One-Way Function |
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LIU Huan-ping,HU Ming-zeng,FANG Bin-xing,YANG Yi-xian
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| Abstract: |
| A dynamic (t,n)-threshold secret sharing scheme based on one-way function is proposed in this paper. It has the following properties: (1) The dealer can renew system secrets without renewing the shadows of the participants; (2) When some participants's shadows are revealed, they can be renewed without any effect on the others; (3) A new shadow can be generated for a new participant without any effect on the others; (4) The shadows can be reused for many times; (5) Only n+1 parameters should be public (When a cheater could be checked out,it should be opened 2n+1 parameters.);(6)The system secret can be recovered with a parallel process. |
| Key words: data security cryptography secret sharing scheme one-way function |
