单向

A new group key management scheme based on grouping and management layer by layer is proposed.

本论文基于这两个方面，主要研究成果如下：对目前存在的多播组密钥管理方案进行了详细的研究分析，尤其是逻辑密钥分层和单向函数树方案，并给出OFT方案不能前向保密和后向保密的依据。

Such equipment is the main magnetic power, can provide a one-way communication and half-wave rectifier power magnetizing current, accessories have contact, clamp, opening and closing, and closed-type magnetizing coil and flexible cables that can carry out contact method, clamp power law and the magnetic coil method.

这类仪器主体是磁化电源，可提供交流和单向半波整流电的磁化电流、附件有触头、夹钳、开合和闭合式磁化线圈及软电缆等，能进行触头法、夹钳通电法和线圈法磁化。

The secret hash digital signature is a new siganture method that combines the ideas of RSA public-key algorithm, MD5 one-way hash function and permutation code at the same time.

保密散列数字签名算法利用RSA公钥密码体制的原理、MD5单向散列函数和排列码加密的思想，构造了一种能够快速实现数据保密、数字签名的签名方案。

A primary motivation for cryptographic hash functions is that they serve as compact representative images of input messages, which they can uniquely identify. For example, the MD5 hash code "72c067b50c90837c95186d019f686700" can be looked on as the "fingerprint" to represent this thesis title uniquely.

密码学杂凑函数也称Hash函数、哈希函数或单向散列函数，它可以将任意长度的消息压缩到固定长度的杂凑值。

To support secure group communications in resource constrained wireless sensor networks, We propose an efficient and scalable key management scheme which only uses symmetric cryptographic algorithms and hashing function. This scheme can achieve forward and backward security.

为了在有限资源的无线传感器网络能安全进行群组通讯，本文只使用对称加密算法和单向哈希函数提出了一种具有有效性和扩充性的组密钥管理方案，并可满足前向和后向安全性。

The client computer receives the information from KDC and runs the user.s password through a one-way hashing function, which converts the password into the user.s KA. The client computer now has a session key and a TGT so that it can securely communicate with the KDC. The client is now authenticated

客户机受到了KDC的信息，然后通过单向的hash算法将用户密码转换成user's KA，现在客户计算机拥有了一个会话key和一个TGT，使得其可以和KDC安全通讯，现在客户通过了域验证，并且准备访问域内的资源。

Hodgson. In our view, Marx's labour theory of value is not irrelevant as claimed by Hodgson to the main topics of evolutionary economics such as diversity and 'natural selection'.

在结论里，针对斯蒂德曼的批评，我们提出：生产的标准技术条件与市场价值之间的关系，并不像他所理解的那样具有单向的、决定论的性质；劳动价值论在马克思的经济学中被用来揭示资本主义再生产的目的和手段，条件和结果之间的不确定的联系。

At the end of the piston is a home-made one-way valve.

在去年底活塞是一个自制的一个单向阀。

Response and damage mechanism of welded-bolted I-beam to box-column connections under single and cyclical loads are analysed in the article.

本文主要就箱形柱和I字型梁的栓焊刚性连接节点，进行了在单向荷载和循环荷载作用下的破坏机理分析和研究。

On the basis of gas migration equation -Darcy Law,coal seam gas content equation -parabola equation ,ideal gas state equation and the continuity equation s of the gas flow,a dynamic model of gas unilateral flow in the coal seam is set .

根据基本假设，对煤层瓦斯流动规律进行了研究，运用瓦斯运动方程—达西定律、煤层瓦斯含量方程—抛物线方程、理想气体状态方程以及气体流动的连续性方程，建立了煤层单向瓦斯流动的动力学模型，并根据边界条件和初始条件，对动力学模型进行了求解，推导出煤壁单位面积的瓦斯涌出量的计算公式，分析了瓦斯涌出量的影响因素，利用测得的数据，进行了实例计算，并用vc编制了计算机程序。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。