一个使用des加密传输的unix下的login程序的服务器端和客户端

ceaser转换文本加密技术-converting text encryption technology

隐藏软件-hidden software !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

98快速的全盘文件查找程序-98 fast overall document search procedures

采用RCS做文件加密的源程序代码，VC环境。包含两个文件包，里面的Readme有详细介绍。-Using RCS to do file encryption source code, VC environment. Package consists of two documents, which detailed the Readme.

What Does the code DO? Sometimes we may desire to hide our file contents from others.One of the possible way is encrypting these files.Here a simple encryption technique is used(In VB - The same technique can be implemented in "c" also.) Program flow Explained * Open the File to be encrypted for Binary Access Read(Say Source File) * Open a temparory file where encrypted data is stored for Binary Access Write(Say Destination File) * Loop through the Source File Byte by Byte * For each byte read from the file, Complement the data. (Using Not operator (in C we have to use "~" operator) * Write Complemented Data to Destination File * Delete the Source File * Rename Destination file as Source File(Now Encryption is over) -What Does the code DO? Sometimes we may desire to hide our file contents from others.One of the possible way is encrypting these files.Here a simple encryption technique is used (In VB- The same technique can be implemented in

SHA-1Hash函数源码，可以对任何文件做Hash，得到的Hash值为160位。具有抗强碰撞，弱碰撞等能力。虽然王小云已经找到了个别碰撞。但在新的好的hash函数出来之前仍将被广泛使用。-SHA-1Hash function source, any document can be done right hash, the hash value of 160. Anti-collision, the weak capabilities of the collision. Although Bruce Schneier, had found individual collisions. But the new good hash function will be out before widespread use.

一种通过判断网卡地址来控制软件使用期限的算法，简单有效。-Address of a card through the control software to determine the use of time algorithms, simple and effective.

创建一个经过加密的软件系统信息文件，在软件启动时会校验这些信息，判断是授权用户在使用该软件。-create an encrypted document information system software, the software will start checking the information, and judgment is authorized users in the use of the software.

一个自动条形码打印程序-an automatic barcode printing program

VC++编程，这是一个曾经开发过的早期的版本,对于初学者有益-VC++ Programming, this is a once-off early development version, useful for beginners