你知道吗?Base64是MIME邮件中常用的编码方式之一。它的主要思想是将输入的字符串或数据编码成只含有{"A"-"Z", "a"-"z", "0"-"9", "+", "/"}这64个可打印字符的串,故称为“Base64”。 Base64编码的方法是,将输入数据流每次取6 bit,用此6 bit的值(0-63)作为索引去查表,输出相应字符。这样,每3个字节将编码为4个字符(3×8 → 4×6);不满4个字符的以"="填充。Base64解码方法中,最简单的也是查表法:将64个可打印字符的值作为索引,查表得到的值(范围为0-63)依次连起来,拼凑成字节形式输出,就得到解码结果。;嘿嘿!买完关子!下一关地址是:scuhuyjkk4_1.php
<title>网络渗透技术测试第三关</title>
<LINK
href="style.css" type=text/css rel=stylesheet>
<script language="Javascript">
function checkPwd(test) {
// var test=document.pass.password.value location.href = test+".php";
}
</SCRIPT><style type="text/css">
<!--
.STYLE80 {
font-size: 24px;
color: #0000FF;
}
.STYLE81 {font-size: 16px}
-->
</style>
<body topmargin=1 oncontextmenu="return false"
ondragstart="return false" onselectstart="return false">
<TABLE align=center border="0" cellpadding="0" cellspacing="0">
<TR>
<TD><img src="logo.gif"></img></TD>
</TR>
</TABLE>
<TABLE valign=top align=center border="0" cellpadding="5" cellspacing="0" width=780 height=450>
<TR>
<TD valign=top width="150">
<div class="main-box_target" align=center>
<font color=blue>本关任务</font>
</div>
<div class="main-box_target1" align=center>
找到过关密码或者下一关地址
</div>
<div class="main-box_target" align=center>
<font color=blue>本关提示</font>
</div>
<div class="main-box_target1" align=center>
有时候,眼睛看到的,并不一定真实!^_^
</div>
</td>
<td width="240">
<script language="JavaScript">
a = 50
var rand = Math.random();
var name = Math.round(rand * (a-1))+1;
galihoo = '<center><img src=img/'+name+'.jpg'+'></img></center>'
document.write(galihoo)
</script> </td>
<td>
<FORM NAME="pass" method=POST>
<div align="center">
<center>
<table border="0" cellpadding="0" cellspacing="0">
<tr>
<td align="center"><font face="Courier New" size="2">请输入过关密码:</font></td>
</tr>
<tr>
<td height="10" align="center"><input type="text" name="password" value="" size=15 style="font-family: Courier New; font-size: 10pt"> </td>
</tr>
<tr>
<td width="150%" align="center">
<p align="center">
<INPUT TYPE="button" NAME="reset" VALUE="提交" STYLE="font-family: Courier New; font-size: 10pt; font-weight: bold" onClick="checkPwd(document.pass.password.value)"></td>
</tr>
</table>
</center>
</div>
<p class="style1"></p>
</FORM>
</TD>
</TR>
</TABLE>
<TABLE>
<TR>
<TD></TD>
</TR>
<TR>
<TD></TD>
</TR>
</TABLE>
<TABLE align=center>
<TR>
<TD>Copyright ©2006 All Rights Reserved.</TD>
</TR>
</TABLE>
</body>
</html>
href="style.css" type=text/css rel=stylesheet>中,或者在logo.gif中
是base64的解码哈,不是unescape的关系