基于Servlet的图形验证码研究与实现

The graphic verification code research and implementation based on Servlet

现在网络速度越来越快,网络访问已经显得比较顺畅了,与此同时,网络安全问题也更加严重了。有了网速做保证,像穷举密码破解和字典密码破解之类的攻击方法成功几率也越来越大了。黑客可以利用一些在线破解工具来破解一些帐号和密码,只要有了密码就可以登陆系统进行操作了。那在不能阻止密码帐号被破解的情况下,怎么来防范这样的安全问题呢?于是验证码技术就产生了。

Now with the network developing faster, network access has become a relatively smooth. At the same time, network security issues are more serious. With network speed to do that as exhaustive password-cracking dictionaries and password-cracking attacks like the way success is also increasing the risk. Hackers can use some online tools to crack and break some of your password, as long as a password to operate the landing system. That can not stop the account password to crack the case, how to prevent such a security problem？ So on a technical verification code.