基于单向函数的动态密钥分存方案

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.

A Dynamic Secret Sharing Scheme Based on One-Way Function

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.