基于Schnorr体制的多重数字签名

基于Sehnorr签名体制提出了一种多重数字签名方案，方案的安全性等价于Sehnorr签名体制。方案具有可验证性．且签名的长度不随签名者的人数线性增长，并能抵抗各种内部合谋攻击，具有更高的实用性和安全性。     

A Quantum Blind Multi-Signature Method for the Industrial Blockchain

Traditional anti-quantum methods and multi-signature technologies to secure the blockchain against quantum attacks will quickly reduce the efficiency and scalability of the industrial blockchain, where the computational resources will experience a polynomial rise with the increasing number of traders. Here, a quantum blind multi-signature method is proposed for the multi-party transaction to provide anti-quantum security. First, the proposed multi-party transaction frame and quantum key distribution in the industrial blockchain are introduced. It integrates a novel quantum blind multi-signature algorithm that is based on the quantum entanglement mechanism, and it is absolutely secure in theory. Second, the anti-quantum multi-signature algorithm is illustrated, where there are four phases, i.e., initialization, signing, verification, and implementation. Third, the security and complexity of the proposed framework are analyzed and compared with related methods in references, and our proposed method is verified to be able to offer good computational performance and blockchain scalability for multi-party transaction. Last, the paper is summarized and future research directions are proposed.     

ELgamal型签名优选方案的应用研究

ELgamal数字签名方案提出后,引起了广泛的分析讨论,产生了许多变体,本文对文献分析的优选方案进行具体应用讨论,在签名加密、密钥分配、盲签名等方面设计了几个应用方案,这些方案在离散对数难解和采用的签名方案安全的基础上,都是安全的.     

一个量子代理多重签名方案

提出了一个基于可控隐形传态的量子代理多重签名方案。选择四粒子团簇态作为量子信道,利用可控量子隐形传态的物理特性来实现代理、签名及验证,方案还采用了量子密钥分配和一次一密算法。不同于基于计算复杂性的经典代理多重签名方案,本方案的安全性不受攻击者计算资源的影响,即具有无条件安全性。     

基于Shamir秘密共享的多重签名方案计算捷径

证明了n∏j=1,j≠i(i-j)n∏j=1,j≠i(-j),给出了Li的计算公式,从而降低了基于Sham ir秘密共享的密钥分配方案的计算量.     

无证书有序多重签名方案的安全性分析

为了提高分布式环境下信任链上推荐信息的认证效率,秦艳琳等人提出一个高效的有固定签名长度的无证书有序多重签名方案,并证明了她们的方案是安全的.但是,秦方案的设计存在安全缺陷,通过具体攻击方法进行分析,结果显示,任意一个敌手都可以篡改其信任路径上的信息,可以伪造所有节点对信息的多重签名.     

一个匿名评审协议

基于双线性映射构造了一个消息可修改的多重签名方案,并利用该方案和群签名提出了一个匿名评审协议,安全分析表明该协议具有良好的匿名性和抗伪造攻击的能力.该协议能应用到电子商务、电子政务等领域.     

A New ID-Based Proxy Multi-Signature Scheme from Bilinear Pairings

ID-based public key cryptosystem can be a good alternative for certifieate-based public key setting. This paper provides an efficient ID-based proxy multi signature scheme from pairings. In the random oracle model, we prove that our new scheme is secure against existential delegation forgery with the assumption that Hess＇s scheme-1 is existential unforgeable, and that our new scheme is secure against existential proxy multi-signature forgery under the hardness assumption of the computational Diffie-Hellman problem.     

一种无可信中心的秘密共享-多重签名方案的密码分析

对最近提出的一种无可信中心的秘密共享-多重签名方案进行了密码分析，发现在该方案中，攻击者可以很容易的伪造有效的秘密共享－多重签名，从而证明了该方案是不安全的．     

一种被指定的多重代理签名方案

给出一种称为被指定的多重代理签名方案 .在这种新方案中 ,原始签名人可授权多个代理签名人 ,分散了代理签名人的签名权力