加密

The system is composed of trust model, structure and function design, certificate database design, and implements the core functions of a standard CA system including signing, issuing and revoking certificates. The security communication modular of the system is based on the SSL Protocol to enhance the security of system communications. Besides, the kernel functions of the system are packed into DLL library, including symmetrical encryption algorithms, digest algorithms, digital signature algorithms and certificate operations such as certificate request, certificate building, certificate format conversion etc.

本文的主要工作是：在研究PKI相关技术的基础上，设计了企业CA系统方案，包括信任模型、结构和功能设计、证书库的设计；实现CA系统中最为核心的数字证书管理，提供数字证书的签发、注销和发布等各项功能；实现了基于SSL协议安全通信模块，增强了系统通信的安全性；系统采用动态链接库技术封装了对称加密算法、数字摘要算法、签名算法以及证书处理(包括证书请求、证书生成、证书格式转换等功能)，以动态链接库的形式提供调用接口，成为应用的安全基础设施。

Based on the embedded system and cipher technology, a digital speech scrambler is designed and realized in this thesis which can security transmit speech, video, fax and data.

本文利用嵌入式系统技术和密码学技术，利用现有的PSTN或ISDN，采用先进的分组加密算法，设计实现了基于EPSON 33209 体系的数字语音保密电话，实现语音、视频、传真及数据的安全传输。

We can then encode on that credit card your name digitally, your Social Security number.

我们可以将你的信用卡加密，将你的名字和社会保障号数字化。

Ethernet data stream with HTML format and DVB-C data stream with MPEG2 format is inputted in form of ASI and SPI, and send it into FIFO via 74F675A. 5416 packs and encrypts and transfers to DVB-C and Ethernet by time diplex mode. Thereby, data bus access is realized.

HTML格式以太网数据流和MPEG2格式DVB-C数据流以ASI和SPI形式输入，经74F675A串并转换进入FIFO.5416进行打包和加密并以时分复用方式传输DVB-C和以太网数据，实现数据总线访问。

Image encryption is one core technology in image security, and also one way for direct and effective image security protecting.

图像加密是图像安全保护的核心技术。

Information encryption is one of the most direct and effective method to resolve the problem of network security.

信息加密是一种解决网络信息安全问题最直接有效的方法。

Considering that magic cube is easy to disarrange and hard to solve, I designed the Magic Cube Stream Cipher: the main part is a virtual cube filled with data; by turning the magic cube many times, original data are disarranged and new ones are generated; new data serve as current secret key, which is a part of the key stream.

我根据魔方"打乱容易恢复难"的特性，设计了魔方流密码算法：主体是一个由数据构成的虚拟魔方；利用多次魔方变换改变数据"魔方"的整体状态并生成新的数据；以此作为本次加密运算的密钥。

Point clouds are discrete data points without the topology relationship between them. So, to facilitate and expedite the extraction of contour points for the late NPR style, firstly we should simplify the point cloud data. In other words, non-contour points should be eliminated but their contour points and feature points should be retained .

点云数据本身是无拓扑关系的离散数据点集，所以，为了方便和加速后期非真实感绘制风格化所需轮廓点的提取，首先对点云数据进行了"粗略"地简化处理，即剔除点云数据中非轮廓点保留了其轮廓点和特征点；然后应用判定准则提取出所表示物体的轮廓点并对其进行"归并"形成便于NPR风格化处理的特征轮廓线；最后再对得到的轮廓线进行NPR风格化效果"加密"处理。

Fourth precision solution can be derived from two grid sets solution with a second precision central difference scheme by Richardson extrapolation. It reduces the amount of calculation. Uncertainty is determined from the discretization error analysis. A finer grid calculation is made to validate the extrapolation scheme.

对于2阶精度中心差分格式的2套网格数值解，用Richardson外推法可以得到4阶精度的解，其工作量比直接求解4阶离散方程的工作量减少许多；对于计算中的数值不确定度，用该方法分析了离散误差，并用逐次加密网格的方法探讨了外推法的合理性。

On disk, file encryption, security of much help.

对磁盘、文件加密，安全有很大帮助。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。