Threshold group signature is an important kind of signatures, but all of the existing threshold group schemes have weaknesses.
门限群签名是一类重要的数字签名，但现有的门限群签名方案几乎都有缺点。
Yet it is not too late, in the eyes of many congressmen at least, to introduce elaborate new schemes to avert calamity. A bipartisan group of senators unveiled one shortly before the president spoke.
但至少在多数国会议员看来，通过引入新策略避免危机倒也不算太晚，一位两党派在不少国会议参议员在稍后中透露道。
We've seen increased use of sophisticated forms and letterhead to send what appears to be legitimate World Bank Group correspondence, as well as several schemes that reference the Bank.
据我们了解，诈骗者目前越来越多地使用设计精美的表格和信笺来发送看上去合法的世行集团正式函件，一些诈骗者使用了世行名义。
So it is very important to design secure, efficient and flexible group signature schemes.
因此设计安全、高效、灵活的群签名方案具有重要的现实意义。
It is impractical for commercial multicast assuming that all group members know the group key in traditional multicast key management schemes.
传统的组播密钥管理都假设所有合法组用户可以知道组密钥，这种假设对于商业组播是不现实的。
However, the security, efficiency or flexibility of most group signature schemes proposed at present, are not very ideal.
然而目前已提出的大多数群签名方案的安全性、效率或灵活性仍不够理想。
Compared with all kinds of key management schemes, group key management is more suitable for wireless sensor network.
该文分析比较了各种密钥管理方案，认为组密钥管理更适合于无线传感器网络。
Then, commonness of these schemes is analysed, an improved coalition resistant group signature scheme is put forward.
分析了这些方案的共性及受攻击原理，最后给出了一个安全的群签名方案。
Group blind signature schemes combine properties of group signatures and blind signatures, which is widely used in electronic commerce, electronic government, voting and bidding.
群盲签名方案具有群签名和盲签名的特点，在电子商务、电子政务、网上选举和投标等场合都有重要的应用。
Based on the discrete logarithm, this paper proposes a group signature schemes.
基于离散对数给出了一种组签字方案。
According to the root-controlling and distributing group key management schemes, this paper proposes a novel layer-cluster key management technique and resolves specific defects of the two schemes.
并在集中式和分布式两种组密钥管理方案的基础上，提出了新的层簇式密钥管理架构，并解决了这两种方案存在的安全缺陷。
We make the three coalition-resistant group signature schemes proposed in chapter three into three dynamic group signature schemes which can increase and delete group members flexibly.
将在第三章中提出的三个能够抵抗联合攻击的群签名方案分别修改为能够灵活地增加和删除群成员的群签名方案-动态群签名方案。
In most group signatures, the length of group public key has linear relation with the number of group member at least, so it is hard to adopt such schemes when the number of group member is large.
目前大部分的群签名方案中，群公钥的长度和群成员数至少是线性关系，因此在群成员很多时，这类群签名方案很难适用。
A new group signature scheme based on the discrete logarithm problem is presented. The scheme is more efficient than the previously known schemes with the same security properties.
文中提出了一个新的群签名方案，该方案的安全性基于离散对数困难问题，其运行效率比已有的同类方案高。
At last, this paper makes multiple objectives decision to irrigation schemes with fuzzy synthetic judge and group decision.
最后，使用模糊综合评判和群决策的方法对灌溉方案进行多目标决策。
Ever since the 1970s, the schemes of division and correlation of the Erlangping Group and its correlated strata have even arrived more than 10 types.
二郎坪群及其相关地层，自70年代以来，划分对比方案达十余种之多。
This paper presented some research results in group signature schemes and their applications in e-commerce.
本文对群签名体制及其在电子商务中的应用进行了研究。
This paper introduces the communication demands and group net principles of the big clients in Shanxi Province, and expounds the technical schemes of the group net provided by Shanxi Communication Co.
介绍了目前山西省内大客户的通信需求和组网原则，阐述了山西省通信公司提供的组网技术方案。
Group signature schemes allow a group member to anonymously sign on group's behalf.
群签名允许群成员以匿名的方式代表整个群体对消息进行签名。
The leveled group key management schemes in distributed information systems are proposed.
提出了分布式信息系统中的分级群组密钥管理方案。
The forward secure Group Signature Schemes introduce forward secure to the Group Signature, improved the security of the Group Signatures, make its can be suitable for some specific application.
前向安全的群签名方案是把前向安全性引入到了群签名方案中，提高了群签名方案的安全性，使其更能适合某些特定的应用。
Most proposed ring signature schemes have the problem that the size of ring signatures depends linearly on the group size, that is an open problem.
在以往提出的环签名方案中，签名长度与环成员个数成正比，这是环签名的一个公开问题。
In most available threshold signature schemes, only one group secret key is Shared among a group of signers and the threshold value is fixed.
现有大多数门限签名体制存在一个共同的问题：门限值是固定的，这限制了它们的应用范围。
For providing anonymity and traceability (which means signatures can be opened in dispute cases) at the same time, the efficiencies of group signature schemes are usually lower.
为使群签名同时具有匿名性与可追踪性(发生争议时可打开)，群签名的执行效率往往比较低下。
Though providing both anonymity and traceability(which means signatures can be opened in dispute cases), most group signature schemes achieve these features at the cost of performing efficiency.
为使群签名同时具有匿名性与可追踪性（发生争议时可打开），群签名的执行效率往往比较低下。
Finally, we analyze the efficiency of the proposed sc heme and show that the scheme is more efficient than group signature schemes such as ACJT scheme in complexity.
最后，我们分析该方案的效率，与acjt等几种方案相比在计算效率上有明显的提高。
Compared with the latest schemes security in the standard model, this scheme has shorter length of group signature and higher operation efficiency, and it allows new members to join in the group.
与目前较新的在标准模型下已证明安全的方案相比，该方案具有较短的签名长度和更高的运行效率，且允许新成员的加入。
Absrtact: Traitor tracing schemes allow detection of at least one traitor when a group of colluders attempt to construct a pirate decoder and gain illegal access to content.
摘 要：当一些共谋者试图构造一个盗版的解码器以获取对数据内容非法访问的时候，叛逆者追踪模型可以用来发现至少其中的一个叛逆者。
Absrtact: Traitor tracing schemes allow detection of at least one traitor when a group of colluders attempt to construct a pirate decoder and gain illegal access to content.
摘 要：当一些共谋者试图构造一个盗版的解码器以获取对数据内容非法访问的时候，叛逆者追踪模型可以用来发现至少其中的一个叛逆者。
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