查询词典 secure communication

The speech secure communication is a kind of communication method that keeps the speech contents from burglarize to hear, it have the biggest practical value on the military and businesses..

语音保密通信是防止语音内容被窃听的通信方式，在军事和商业上具有极大的实用价值。

Real-time chaotic secure communication system synthesize the new research achievement of nonlinear theory, cryptology and communication technology, and it will be applied widely in the field of information security.

由于实时混沌保密通信系统综合了非线性理论、密码学以及通信技术的新成果，将在信息安全中具有广阔的应用前景。

At present, there are two branches in the research of database security technology, which are secure database management system and enhancive database security system. According to the view of enhancive database security system, this paper takes the typical TCSEC model as reference. An agent system is built between database client and database server for secure communication, SQL parsing and access controlling.

目前，我国数据库安全技术研究主要有安全数据库管理系统和数据库安全增强系统两个方向，本文主要从数据库安全增强系统的角度出发，参考经典的TCSEC监视器模型，在数据库客户端和服务器端之间建立一个代理系统，来完成数据库的安全通信、SQL分析和访问控制等功能。

In the research of secure communication, the thesis analyzes some shortcomings of Diffie - Hellman"s crypt key exchanging protocol, presenting a new exchanging method based on the "station to station protocol and cookie mechanism, realizing the software of crypt key exchanging and secure communication of IP datagram on router.

在对安全通信的研究中，本文分析了Diffie-Hellman密钥交换协议中易受攻击的地方，提出了基于端对端协议及cookie机制的密钥交换新方法，并在路由器上实现了密钥交换和IP报文的安全通信。

Combining with the research situation in domestic and abroad, the applications of chaotic laser in the areas of communication and measurement are introduced, such as chaotic secure communication, chaotic laser ladar, and chaotic optical time domain reflectometer.

结合国内外研究现状，简要介绍了混沌激光在通信及测量领域的应用，包括混沌保密通信、混沌激光雷达和混沌光时域反射仪等技术，并指出了混沌光通信与混沌激光测距的发展趋势。

The development and significance of chaology are introduced firstly. The general requirement of communication system and the application potential in secure communication are expatiated. The chaotic secure communication methods home and abroad are also summarized, including chaos spread spectrum communication, chaos key-shifting, chaos parameter modulation, chaos masking, chaos CDMA. The exiting problems and development direction are also pointed out respectively.

介绍了混沌学的发展过程和意义，阐述了通信系统的一般要求和混沌在保密通信中的应用潜力，综述了国内外现有的混沌保密通信方法，其中包括：混沌扩频通信，混沌键控，混沌参数调制，混沌掩盖，混沌数字码分多址等五大类，指出了各自存在的问题和发展方向。

Because It has stronger ability of resisting narrow band,multipath and jamming interference than that of the conservational communication systems,and also has advantages of concealed information and multiple access secure communication,thus the spread spectrum communication technology draws the people's attention more and more.

由于扩频通信系统与常规的通信系统相比，具有很强的抗窄带干扰，抗多径干扰，抗人为干扰的能力，并具有信息隐蔽、多址保密通信等优点，因而越来越受人们的重视。

Secure communication scheme based on chaotic synchronization is an entirely new secure communication scheme. Pecora and Carroll propose secure communication scheme based on chaotic synchronization first in 1990. The scheme makes use of the good characteristic of chaotic signals, and has high security. Lots of papers improve on the scheme after it has been proposed.

基于混沌同步的保密通信方案是一种全新的保密通信方式。1990年，Pecora-Carroll首先提出了基于混沌同步的保密通信方案，方案利用了混沌信号所具有的优良特性，具有很高的安全性，之后又有很多文献对该方案进行了改进。

The security of several typical chaotic synchronized secure communication schemes , as well as the respective unmasking methods are studied to find the way to improve the security. A new secure communication scheme based on active-passive decomposition using parameters perturbation technique, which makes it has a kind of dynamic secrete key, is analyzed in this paper.

摘要在分析几种典型的混沌同步保密通信方案及针对混沌同步保密通信的分析破译方法的基础上，研究了一个新的基于Lorenz方程的主动一被动同步保密通信方案，其特点是具有动态密钥，从而对上述攻击方法具有抗破译能力。

Based on the data retrieved from Derwent Innovation Index, this paper presents an allscale patent analysis of secure communication by retrieving, classifying and analyzing the patents which registered at SIPO and other IPOs, expecting to show an overview of the developing trends, advancing process, research hotspotscore technicians, key labs and so on in the field of secure communication in China and the world.

使用德温特专利文献系统，对申请的保密通信相关专利进行全面的检索，并对结果进行归类、整理、比较，结合定量和定性的分析，并运用地序分析与时序分析方法，以期勾勒出保密通信技术在全世界和中国的发展脉络，展示保密通信技术的发展更替，并得出该领域技术领先者以及研究热点等信息。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。