个案调查法是指采用各种方法，搜集有效、完整的资料，对单一对象进行深入细致研究的方法。个案调查法不仅仅只是一种研究方法，也是一门复杂的认知课程，是帮助个人解决现实问题的理论。通常个案调查法是在对象总体中选择特定的人、事、物所进行的深入描述和分析，研究对象可以是一个人、一个机构、一个社会团体等。 第一节 什么是个案调查法 第二节 怎样进行个案调查 第三节 个案调查要注意什么

Additional key-sizes and block-sizes Ability to function efficiently and securely in a wide variety of platforms and applications low-end smartcards, wireless: small memory requirements IPSec, ATM – small key setup time in hardware B-ISDN, satellite communication – large encryption speed Flexibility

Iterating Block ciphers Definition A product cipher combines two or more transformations in a manner intending that the resulting cipher is more secure than the individual components. Definition An iterated block cipher is a block cipher involving the sequential repetition of an internal function called a round function. Parameters include the number of rounds Nr, the block bitsize n, and the bitsize k of the input key K from which Nr subkeys Ki (round keys) are derived. For invertibility (allowing unique decryption), for each value Ki the round function is a bijection on the round input

Definitions – Digital Signature - a data string which associates a message with some originating entity – Digital Signature Generation Algorithm – a method for producing a digital signature – Digital signature verification algorithm - a method for verifying that a digital signature is authentic (i.e., was indeed created by the specified entity)

Numbers Integers Real Arithmetic Operations Addition and subtraction Multiplication and division Exponentiation and logarithm

Security Attack: Any action that compromises the security of information. Security Mechanism: A mechanism that is designed to detect, prevent, or recover from a security attack. Security Service: A service that enhances the security of data processing systems and information transfers. A security service makes use of one or more security mechanisms

Public-Key Applications can classify uses into 3 categories: – encryption/decryption (provide secrecy) – digital signatures (provide authentication) – key exchange (of session keys)

You are the CEO of Coca-Cola. You are responsible for bringing a refreshing taste to zillions of people all over the world, but want to keep the recipe secret from Pepsi’s industrial spies

5.1 认识Authorware 6.0中的交互 5.2 按钮响应（Button） 5.3 热区响应 5.4 热件响应 5.5 目标区域响应 5.6 菜单响应 5.7 条件响应 5.8 文本输入响应 5.9 按键响应 5.10 尝试次数限制响应 5.11 时间限制响应

一、概述 二、 SPSS13.0的界面的认识 三、 变量的定义和数据的输入 四、 数据常用的一些编辑 五、 常用统计学方法 六、 曲线的绘制