【摘要】 针对现有门限签名方案在抵抗合谋攻击上的弱点,基于离散对数问题提出了一个(t,n)门限签名方案。在该方案中,t个或t个以上的内部成员合作可以代表群体产生有效的门限签名,但不能获取系统秘密,从而有效地阻止了内部恶意成员的合谋攻击。方案还能够防止伪造攻击,并具有可追踪性。更多还原

【Abstract】 Threshold signature scheme has weakness in withstanding conspiracy attack from part members of group.The paper proposes a new DL-based(t,n) threshold signature scheme.In this scheme,any subset of t or more than t parties of the group can execute a valid threshold signature on behalf of the whole but our scheme has the advantage that any subset can’t recover the system secret and thus conspiracy attack from malicious group members is unfeasible.The scheme provides unforgeability and traceability as well.更多还原