Delphi:Delphi环境使用SHA算法加密文件和字符的实例，或许有些朋友对SHA不太熟悉，其实这种算法经常可看到，比如从网上下载的一些DLL文件中，你可点击右键查看DLL属性，在“验证”一栏中，往往可以看到MD5校验码、SHA码、CRC32码等不同的加密算法验证码，当然，不只是DLL文件中，其它的文件像EXE也可以存在这些信息的，所以说SHA加密文件已经普遍，有必要通过本源码学习一下SHA加密的原理和实现方法。

-Delphi: Delphi environment instance SHA algorithm to encrypt files and characters, perhaps not familiar with some friends on the SHA, in fact, this algorithm can often be seen, for example, downloaded from the Internet some of the DLL file, you can right click to view DLL properties in the "Authentication" column, you can often see the MD5 checksum, SHA code, CRC32 codes different encryption algorithms verification code, of course, not just the DLL file, other files like EXE can also be present such information, so SHA encrypted file has been generally necessary by the SHA encryption source code to learn about the principles and implementation methods.