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中文摘要：
基于树状结构和移动Agent机制设计了一种新的秘密共享方案。分享者按其所在层次进行分组,每一组分享者可依据其持有的碎片恢复该组所共享的秘密。当每一组分享者均恢复出他们的秘密之后,这些新的秘密又可作为上一层分享者所持有的新的碎片,构成新一轮的秘密共享,由此形成秘密共享的树状结构。移动Agent机制将该结构动态化,从而使得秘密分享者在秘密恢复之前并不知道自己确切的分组,在更大程度上避免共享者的合谋,实现更安全的多阶段秘密共享。
英文摘要：
A new secret sharing scheme is constructed based on the tree structure and the mechanism oi mobile agent. The shareholders are grouped with their levels and each group can renew the shared secret with the shares they holds. After each group renews their secret, the news become a share of the apper level, and a new secret sharing process comes into being, hence a tree structure is formed by this process. The mechanism of mobile agent makes the tree structure dynamic, and the shareholder doesn＇t know exactly which group he is subjected to. So the cahoots are avoided to a great extent and a more secure multi-stage secret sharing is realized.
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