【作者】 庞辽军； 李慧贤； 王育民；

【Author】 PANG Liao-jun WANG Yu-min Min.of Edu.Key Lab.of Comp.Netw.and Info.Secu.,Xidian Univ.,Xi’an 710071,China Li Huixian School of Comput.Sci.and Eng.,Northwestern Polytechnical Univ.,710072,China

【机构】 西安电子科技大学计算机网络与信息安全教育部重点实验室； 西北工业大学计算机学院；

【摘要】 在加强的门限数字签名体制中,只有达到一定数目的签名者合作可以生成有效的门限签名,同时, 只有达到一定数目的验证者合作才可以验证该签名的有效性。这样的门限签名体制能够更好地解决权限滥用等问题,具有重要的应用价值。本文基于离散对数,提出了一个门限数字签名体制。该体制而无需可信中心支持,能够抵御合法参与者间的相互欺诈和外部攻击者的攻击,该体制的安全性是基于离散对数问题的难解性,是一个安全有效的门限签字体制。更多还原

【Abstract】 In a strengthened threshold digital signature scheme,only a specific number of signers can sign a message correcdy, and only a specific number of verifiers can verify the validity of the signature.This type of threshold digital signature scheme can deal with the problem of the abuse of rights more efficient than ever before,and thus it can find important applications.Based on the discrete logarithm problem,a threshold digital signature scheme is proposed.There is not trusted center required in this scheme and this scheme provides the capability of detecting cheating and identifying the cheater that may be from the internal le- gal participants or the external attackers.The security of this scheme is based on the difficulty of solving the discrete logarithm problem.So this scheme is a computationally secure and efficient scheme.更多还原