Want to know the web safe to understand first what is the web straightforward statement is build websites, professional point, is in the early days of the Internet inside structures, site application, the web is also points some version of the early version 1.0 is just this simple site has many functions cannot be achieved, now the web to realize the function of many cannot be achieved at that time, such as blogs, online shopping, BBS still have a lot of kinds, I won't give you list, what is the web safe, I how to give everyone a metaphor! Just as you are a thief to steal your things are going to watch the place right before! Look at the place with a hole, the place has the police, so still don't understand the word is websites appear loophole, from 1.0 to 2.0 there have been many loopholes, I am here to list some of the more famous! SQL injection, XSS cross-site scripting attacks, web page hang a horse and a series of holes, there are some criminals to use on your website, next to tell everyone about the principle of SQL injection, good night, wish you sweet dreams