查询词典 verifier

Finally this thesis analyses the efficient revocable group signature scheme with forward security proposed by Chen Shaozhen and Li Daxirig. An adversary can personate a legal group member by forge a group membership certificate, and then can forge group signatures that can be verified by a verifier. And the group manager can also forge group signatures that can be verified by a verifier. So the scheme is insecure. Meanwhile, there are redundancy steps in the scheme, thus the efficiency is low.

接着，对陈少真和李大兴提出的一种有效取消的前向安全群签名方案进行了密码学分析，一方面，攻击者可以通过伪造群成员证书来伪造能够通过验证的群签名；同时，群管理员也可以伪造一个可以通过验证的群签名，因此，该群签名体制是不安全的；另一方面，该体制存在冗余数据。

In a designated verifier signature scheme,only the designated verifier can verify the validity of the signature.

在一个指定验证者签名方案中，只有指定的验证者才能验证签名的有效性。

On the basis of published paper, an ID-based provable secure and strong designated verifier signature scheme, a modified strong designated verifier signencryption scheme, and a modified extended aggregate signature scheme based on the supersingular elliptic curve is presented in this thesis.

在已有文献的基础上，综合形成了一种基于身份标识的超奇异椭圆曲线上的强指定验证者的数字签名方案、签密方案和可扩展的群签名方案。

In this scheme, by means of the sequence secret sharing scheme, the verification participators can divide the signature verifier from the chain grantors, the signature verifier cannot verify the validity of the signature until he is authorized by all chain grantors in turn, and any chain grantor(even all chain grantors are collusive)cannot verify the validity of the signature.

利用有序秘密分享方法将验证参与者分为签名验证者和链式验证授权者，签名验证者只有在经过链式验证授权组中每一个成员的依次授权时，才可以验证签名的有效性，而且链式验证授权组中的任何成员都不能验证签名的有效性。

This paper proposed certificateless universal designated multi-verifier signature schemes , expended a single verifier to a set of multi- verifiers.

提出了无证书的广义指定多个验证者的签名体制，将指定单个验证者签名方案扩展到了指定多个验证者的签名方案。

Third,in order to solve the problem of the contradiction between the authentication and the privacy,we construct a designated-verifier chameleon proxy signature scheme.Only the designated verifier can verify the validity of the signature which can efficiently prevent the forgery from the dishonest verifiers.

第三，为了解决认证性和隐私性相冲突的问题，我们基于身份密码系统并结合我们所构造的一个卡麦龙函数，提出了一种新的指定验证者卡麦龙代理签名方案，在该方案中，只有指定的接受者能够验证签名的有效性，该方案能够有效的保护验证者的利益。

Then, a self-certified anonymous proxy signature scheme based on the view of self-certified public key policy and the scheme of anonymous proxy signature are proposed. The proposed scheme not only lightens the burden of verifier, but also has characteristics such as anonymousness and trackability.

然后，结合自证明公钥体制和匿名代理签名，设计出一种自证明匿名代理签名方案，此方案不仅能减轻验证者的负担，还具有匿名性和可跟踪性的特点。

A verifier can be convinced that the committed number x is neither less than the integer a nor more than the integer baiter the protocol is operated only once, and hence the exact proof that x lies in the interval is achieved.

为了去掉这种方法上的重复性，通过联合运用两承诺值相等协议及CFT证明协议提出了一个证明承诺值位于特定区间的新协议，协议运行一次便可使验证者确信承诺值x位于区间中。

The designated verifier signature scheme was proposed using the root problem and conjugacy search problem in the braid group. Analysis shows that it is a simple, fast and efficient scheme with security features.

介绍了辫群的基本概念和辫群中的困难问题，在此基础之上，利用辫群中左右子群的元素可交换性，提出了一个基于辫群上的共轭查找问题和p次根问题的指定验证者的签名方案，通过分析可知，该方案具有简单实用、算法速度快和高效安全的特性。

Zero knowledge protocol is a basic method of cryptography,which means that the certifier owns a secret,and it doesn′t reveal any other useful information about the secret to verifier when authenticated.

零知识证明是密码学中的一个基本方法，是指证明者使验证者确信证明者拥有某一个秘密值，而证明者没有向验证者泄漏关于该秘密值的任何有用信息。零知识证明的基本思想。

"Second Life is remarkably easy to work with, and is very popular,"

"第二次生命是显着容易的工作，并且很受欢迎，"

For example, we usually assume that materials are homogeneous and isotropic and free of internal defects or flaws.

为了得到适合有限元分析的模型，我们必须经过如图2所示的简化步骤。