本预防类最大的优点是对于最终用户来说透明，用户几乎感觉不到预防类的存在。而对于机器人或类似的自动化程序来说，需要获取页面的SID，然后根据SID计算及拼写，最后将正常的数据与根据SID计算出来的结果一并提交至处理页面进行验证。-The biggest advantage of this class is to prevent the end user is transparent to the user almost feel the presence of prevention class. For automated robots or similar procedures, the need to obtain the SID of the page, and then calculated according to SID and spelling, and finally the normal data and results calculated according to SID be submitted to the processing of the page to verify.