【摘要】 一个门限方案是将一个秘密分成个子秘密,并将这些子秘密分发给个参与者,使得:知道任意个或更多个子秘密可以将该秘密恢复,而知道任意个或更少个子秘密却不能将该秘密恢复的一种秘密分享方案.动态门限方案是一种特殊的门限方案,其特点是:更新要分享的秘密无需修改和收回任何子秘密.本文将离散对数、整数分解、求高次方根等数学难题相结合,提出了一个新的防欺诈动态门限秘密分享方案,并讨论了其安全性.更多还原

【Abstract】 A threshold sheme is a method whereby pieces of the secret , called shares are distributed to participants so that : the secret can be reconstructed from the knowledge of any or more shares, and the secret cannot be reconstructed from the knowledge of any or less shares. A dynamic secret sharing sheme is an especial threshold sheme.Its character is that the secret can be renewed without modifying and rebaking any share. This paper proposes a new dynamic threshold secrete sharing sheme to identify cheaters by integrating the discrete logarithm problem and the integer factorization problem with higher roots problem.This paper also discusses the security of the sheme.更多还原