1. 密码学概述 2. DES加密算法 3. RSA加密算法 4. 消息摘要和数字签名：实现完整性和抗抵赖的方法 5. PGP (Pretty Good Privacy)： • 日常工作最常用的加密工具，使用PGP产生密钥，加密文件和邮件。 6. 使用OpenSSL中的密码函数 7. Windows系统提供的密码算法 8. python语言的加密模块

In this paper, I provide a tutorial exposition on maximum likelihood estimation (MLE). The intended audience of this tutorial are researchers who practice mathematical modeling of cognition but are unfamiliar with the estimation method. Unlike least-squares estimation which is primarily a descriptive tool, MLE is a preferred method of parameter estimation in statistics and is an indispensable tool for many statistical modeling techniques, in particular in non-linear modeling with non-normal data. The purpose of this paper is to provide a good conceptual explanation of the method with illustrative examples so the reader can have a grasp of some of the basic principles

15.1 PGP(Pretty Good Privacy) 15.2 S/MIME (Secure/Multipurpose Internet Mail Extensions)

浙江大学医学院：《医学史简论 A Brief History of Medicine》课程教学资源（PPT讲稿）送瘟神——人类与传染病的斗争 Send away the Good of Plague-Battles to Infectious Diseases（一）

《IT Project Management》课程教学资源：What makes a good manager

◼ Importance of a good communication ◼ Project Communication Management Process ◼ Communication Planning (沟通计划编制) ◼ Information Distribution (信息发送) ◼ Performance Reporting (绩效报告) ◼ Administrative Closure (管理收尾) ◼ Suggestions for improving project communications

A mathematical model of kinetics of carbide layer formed on the surface of steel in fused system was set up with the theory of non-stable diffusion mass transfer and regular solution sub-lattice. This model was analyzed and testified by the experiments in which the VC layers were formed on four kinds of steels as steel 45, 4Cr5Mo-SiV1, T10, and Crl2MoV immersed in the V2O5-Na2O-B2O5 fused system with the reducing agent of silicon. The results showed that there was a good agreement between the model and the experimental results; the growth speed of carbide layer depended on the factors of carbon activity in substrate, treatment temperature, kinds of carbides and its structure

Section A How to Make a Good Impression Section B Body Language Section C Gestures

复旦大学：《中国历史——从改良到革命 China-From Reform to Revolution》课程资源_补充资料_course reading 2 is global shanghai good to think

《学术英语（医学）》拓展阅读资料：Good patients and difficult patients rethinking our definition