一些验证码是这样的:

public bool charsEquals(char[] input, char[] txt)
{
    for (int i = 0; i < Math.min(input.length; txt.length); ++i)
    {
        if (input[i] != txt[i]) return false;
    }
    return true;
}

像这样使用它:

if (charsEquals(inputPassword, requestedPassword))

看了YouTube上关于Tux和比尔·盖茨之战的搞笑视频后，我开始思考这个问题。当Tux没有密码进入微软大楼时。

想到这一点，我所见过的最糟糕的安全漏洞是当管理电子门锁的人说“你是什么意思，锁不知道公共假日”?

是的，每个周一到周五都是公共假日，因为门系统已经安装好了，我看到前门在08:00-17:30没有锁。

“网络编程安全101”风格的最大错误是招聘机构的搜索页面提供了“下一页”链接，这只是获取更多工作列表的SQL语句。您可以轻松地将此URL更改为任何其他SQL语句，包括“drop table X”。如果你这么做了，他们的整个网站都会完蛋。

我在The Daily WTF上看到过这个。

<script language="javascript">
<!--//
/*This Script allows people to enter by using a form that asks for a
UserID and Password*/
function pasuser(form) {
    if (form.id.value=="buyers") { 
        if (form.pass.value=="gov1996") {              
            location="http://officers.federalsuppliers.com/agents.html" 
        } else {
            alert("Invalid Password")
        }
    } else {  
        alert("Invalid UserID")
    }
}
//-->
</script>

恕我直言，没有什么比这更好的了。

Right at the start of the .com era, I was working for a large retailer overseas. We watched with great interest as our competitors launched an online store months before us. Of course, we went to try it out... and quickly realized that our shopping carts were getting mixed up. After playing with the query string a bit, we realized we could hijack each other's sessions. With good timing, you could change the delivery address but leave the payment method alone... all that after having filled the cart with your favorite items.

当我13岁的时候，我的学校为学生开设了一个社交网络。不幸的是，我发现了一个安全漏洞，可以将URI更改为另一个用户id，如“?”userID=123”，并为该用户登录。显然，我告诉了我的朋友们，最后学校的社交网络充满了色情。

不过我不推荐。