本文通过通俗易懂的讲解，让您就像读小说一般，轻轻松松就能理解数字签名的基本原理和应用方法（即使您是一个并不精通计算机的企业老总，也能读懂本篇文章）。然后我们再逐步深入技术细节，最后将给出一个在B/S信息系统中使用数字签名的DEMO。(In this paper, you can understand the basic principles and application methods of digital signature easily and easily through simple and easy explanation. You can read this article even if you are a master of computers who are not proficient in computers. Then we step into the technical details and finally give a DEMO that uses digital signatures in the B/S information system.)