【摘要】 基于Shamir秘密共享,提出一种动态的密钥分存方案.该方案中,密钥被拆分为n份,分别交由n个代理秘密保存;其中任意大于或等于t个代理协作可以重构密钥,而任意少于t个代理却不能.另外,在密钥分发者不再持有密钥的前提下,能够动态更新共享、动态增加或删除参与者及动态增加门限值.保证了系统的扩展性、健壮性,从而提高系统的安全性.因而,有着很好的应用前景.更多还原

【Abstract】 This paper proposed a dynamic secret key sharing scheme based on Shamir’s secret sharing,which allowed a dealer owning a secret key to split this secret key among a group of n agents in such a way that any t agents could reconstruct the secret key,but less than t agents couldn’t do the same thing.In addition,under the conditions that the dealer didn’t hold the secret key any longer,it could dynamically renew the shares,joined or deleted the participant,and increased the threshold value.It kept the extensibility and robustness of the sharing system,and then enhanced its security.Thus,there were many potential applications.更多还原