说明：  基于U盘的身份认证 现在市场上出现各种各样的基于硬件的加密设备，但应用于身份认证的还很少，大部分应用在软件产品的加密方面。 软件开发商在开发软件特别是行业软件时经常用到身份验证，传统当方式是采用用户名＋密码的方式进行认证，这样的验证方式存在很多缺点主要表现在以下两个方面： 1． 用户信息容易泄密 2． 用户信息容易遗忘 3． 给领导使用带来不便 作为软件开发商为了提高软件的可用性、加载身份认证功能。但需要从市场上加密厂商手中购买身份认证设备，但存在以下弊端： 1． 增加软件的成本 2． 每一个用户需要一套，当系统用户较多时产生较高的成本 3． 设备内部的核心技术不了解，增加了软件推广应用中的风险 4． 身份认证设备功能单一
(U disk-based identity authentication on the market now is a wide range of hardware-based encryption equipment, But for identity authentication also minimal, most application software products in the area of encryption. Software developers in the development of the software industry in particular is often used in the software authentication, When the traditional way is the user name+ password authentication methods, This certification means there are many major flaws in the following two aspects : 1. User information easily leaks 2. User information easily forgotten 3. Leading to the use of inconvenience as software developers to improve software usability, loading authentication function. But needs from the market and buy encryption manufacturers authentication equipment, but the followin)