采用PGP保证广域网系统的安全

为了保证广域网系统的安全,在说明其安全威胁和安全要求的基础上,介绍了PGP的原理、技术特点及配置方法,通过对PGP安全性的分析得出结论:基于PGP本质上的安全性,只要遵循正确的使用方法,就可以很好地避免安全漏洞的产生,从而达到确保广域网系统安全的目的.     

数据加密技术探究

在信息时代,数据的安全是非常重要的,加密是保证数据安全的主要方法之一,加密时要选择恰当的算法。文中主要介绍了对称加密和非对称加密算法。对称加密技术中以DES加密算法为例,介绍了它的加解密过程,非对称加密以RSA加密算法为例,介绍加解密过程并给出加解密过程素数生成参考代码。     

基于PGP的动态连接库与U盘构成的安全认证系统

利用PGP提供的动态连接库以及U盘的特点,提出了一种电子文档的加密与认证系统,并讨论了相关算法和流程。     

A decision framework for maximising lean manufacturing performance

Since the development of the original value stream mapping (VSM) by Taichi Ohno at Toyota, a number of authors have suggested several additional VSM tools to understand and improve the value stream through waste reduction. A single best VSM tool, though effective in dealing with a certain waste type, becomes redundant as other wastes take centre stage and/or organisational priorities change. To overcome this, a decision framework based on a novel formulation of the integrated analytical hierarchy process (AHP) – pre-emptive goal programming (PGP) has been proposed. This framework not only guarantees accurate selection of an ideal VSM tool, based on the current organisation's priorities, but also aids the decision maker to arrive at the optimum implementation sequence of a chosen set of VSM tools to identify and reduce all wastes present in the system, thereby maximising organisational performance in the shortest timeframe.     

INFI-90控制系统在集控改造中的研究

介绍了在克拉玛依电厂集中控制改造工程中,ABB-贝利的INFI-90 DCS控制系统为实现集控改造,对其进行操作员站和工程师站与INFI-90网络的数据接口、操作员站与现有的PGP系统的集成的研究及应用。     

Diversity and Taxonomic Distribution of Endophytic Bacterial Community in the Rice Plant and Its Prospective

Endophytic bacterial communities are beneficial communities for host plants that exist inside the surfaces of plant tissues, and their application improves plant growth. They benefit directly from the host plant by enhancing the nutrient amount of the plant’s intake and influencing the phytohormones, which are responsible for growth promotion and stress. Endophytic bacteria play an important role in plant-growth promotion (PGP) by regulating the indirect mechanism targeting pest and pathogens through hydrolytic enzymes, antibiotics, biocontrol potential, and nutrient restriction for pathogens. To attain these benefits, firstly bacterial communities must be colonized by plant tissues. The nature of colonization can be achieved by using a set of traits, including attachment behavior and motility speed, degradation of plant polymers, and plant defense evasion. The diversity of bacterial endophytes colonization depends on various factors, such as plants’ relationship with environmental factors. Generally, each endophytic bacteria has a wide host range, and they are used as bio-inoculants in the form of synthetic applications for sustainable agriculture systems and to protect the environment from chemical hazards. This review discusses and explores the taxonomic distribution of endophytic bacteria associated with different genotypes of rice plants and their origin, movement, and mechanism of PGP. In addition, this review accentuates compressive meta data of endophytic bacteria communities associated with different genotypes of rice plants, retrieves their plant-growth-promoting properties and their antagonism against plant pathogens, and discusses the indication of endophytic bacterial flora in rice plant tissues using various methods. The future direction deepens the study of novel endophytic bacterial communities and their identification from rice plants through innovative techniques and their application for sustainable agriculture systems.     

未来战地网络的安全体制

战地网络容易受到攻击和破坏,如何实现未来战地网络中的安全通信是一个亟待解决的问题。提出了一种支持未来多层无线异构adhoc战地网络安全通信的安全体制,它具有如下性质:(1)可以在有/无基础网络设施模式下工作并无缝切换;(2)采用集中式CA签名和(t,l)门限签名体制相结合的认证方法;(3)对报文和报头分别加密;(4)可以对签名者的身份进行追踪。     

基于PGPComp的数字信封的实现

随着互联网应用的不断发展,数据信息的安全问题越来越被重视,迫切需要解决重要数据在互联网上传输时的保密与认证问题.针对这些问题,提出了一种基于PGPComp的数字信封技术框架的设计与实现.通过研究信息加密及信息认证的常用方法以及PGPComp模块的使用方法,从而设计出一种有效的数字信封技术框架,并运用Delphi和PGP...     

电子邮件系统中PGP的改进研究

本文针对电子邮件安全系统中现行使用的PGP,提出了一个改进的PGP方案,新方案中将ECC和AES有机结合,并新增加了时间戳技术,不仅极大增强了E-mail的安全性,而且加密次数也减少了,同时也解决了目前PGP中加解密速度和安全性不能兼顾的问题。     

基于PGP信任模型的IEEE 802.16 Mesh网安全机制

IEEE 802．16是一种具有发展前景的宽带无线接入系统空中接口标准，但其安全机制仍存在不少问题，从而限制了其进一步发展。文中讨论了IEEE 802．16Mesh模式中节点间的信任模型及建立连接的过程，并指出其中存在的安全漏洞。在此基础上，借鉴PGP中的自然人类社会的信任机制，改进了Mesh模式中节点间的信任模型，并提出了新的连接建立方式。分析表明新方式的安全性能要优于原方式。