签名

The scheme is proven to be forward secure, which is based on the abstrusity of discrete logarithm and square rood modulo composite number problem.

新方案的特点是将当前密钥隐藏在签名中，仅使用与当前密钥有关的信息对消息进行签名，与后继密钥无关，签名的前向安全性基于离散对数和模合数平方根问题的难解性。

Basis " law of autograph of electron of Chinese people republic " regulation, the legal effectiveness that effective electron signs is equal to be mixed at handwritten sign affix one's seal, this is the legal cornerstone that trades on all nets.

根据《中国人民共和国电子签名法》规定，有效电子签名的法律效力等同于手写签名和盖章，这是所有网上交易的法律基石。

Therefore in recent, the research about bilinear mapping based group signature is also at a start stage, there are no a bilinear mapping based group signature scheme obtains common recognition. There are some design defects in existing schemes, and the security is not very ideal.

所以目前基于双线性映射的群签名还处于一个起步阶段，还没有一个有代表性的基于双线性映射的群签名方案，而现有的一些基于双线性映射的群签名方案的设计缺陷较多，且安全性较差。

A comprehensive research has made in the application of elliptic curve based bilinear mapping in the group signature, security of bilinear mapping is established on the GAP group. Because the DDH problem is easy to solve in GAP, this fact results it is very difficult to design a bilinear mapping based group signature scheme which can satisfy anonymity and the tractability.

对基于椭圆曲线的双线性映射在群签名中的应用进行了深入的研究，由于双线性映射的安全性建立在GAP群上，而在GAP群上的DDH问题是容易求解的，这样导致在基于双线性映射的群签名方案设计中很难同时兼顾群签名的匿名性和可跟踪性。

Though the analysis, taking different strategy according to the threshold signature synthetist\'s role, a bilinear mapping based threshold group signature scheme in which synthetist is a group member was proposed, as well as a bilinear mapping based threshold group signature scheme with forward security in which synthetist is security mediator was proposed.

在分析的基础上，根据门限签名合成者身份的不同采用不同的设计策略，提出了一个基于双线性映射的门限群签名方案，以及一个基于双线性映射的前向安全的门限群签名方案。

A comprehensive research has made in designing technologies of bilinear mapping based threshold group signature scheme. A bilinear mapping based chamellon threshold group signature and a forward security threshold group signature were analyzed, the mistakes and flaws in these schemes were pointed out.

对基于双线性映射的门限群签名方案设计技术进行了深入的研究，分析了一个基于双线性映射的卡梅隆门限群签名和一个基于双线性映射的前向安全的门限群签名，指出了这些方案设计中存在的一些设计错误和缺陷。

Combined the basic knowledge based on elliptic curve signature and proxy multi-signature system with the bilinear map, constructed a proxy multi-signature scheme.

3结合基于椭圆曲线的代理签名体制和代理多重签名的基本知识，使用双线性映射，构造了一种代理多重签名方案。

The realization of the electronic signature of this system makes use of users' authority to sign, as one user has approved the report forms selected, he only just needs to push " signature "s according to the knob, The binary scale picture that he stored in the data base will be "ed sign" to the corresponding position of the report form automatically.

本系统的电子签名的实现就是利用用户的权限来签名的，当某一用户认同了所选报表，他只需按下"签名"按钮就行了，他储存在数据库中的二进制图片就会自动地"签"到报表的相应位置。

Digital signature operates the born and a series of sign and codes to constitute the electronics password to carry on the signature through a certain password , replace to the writing signature or an official seals , to confirm the body , the data source and integrities of signs , keeping data from burglarize to take , distort and break , thus to attain the purpose of protecting the data

数字签名是通过某种密码运算生成一系列符号及代码组成电子密码进行签名，来代替书写签名或印章，确认签名者的身份、数据来源和完整性，防止数据被窃取、篡改和破坏，从而达到保护数据的目的。

Based on the current ID-based signature and ID-based blind signature, a new ID-based blind signature without trusted PKG was proposed. Meanwhile, a new ID-based proxy signature without trusted PKG was also proposed.

在已有基于身份无可信中心签名的基础上结合基于身份的盲签名提出了一个基于身份无可信中心的盲签名，同时提出了一个基于身份无可信中心的代理签名。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。