这是一个非常简单的加密程序，大家自己看看！
<%
userid = Request("userid")
userpass = Request("userpass")

Set conn = Server.CreateObject("ADODB.Connection")
DBPath = Server.MapPath("userinfo.mdb")
conn.Open "driver={Microsoft Access Driver (*.mdb)};dbq=" & DBPath

userid=trim(userid)
userpass=trim(userpass)
sql="select * from [userinfo]"
set Rs=Conn.execute(sql)
while not (Rs.bof or Rs.eof )
if userid=trim(Rs("用户名")) and userpass=trim(Rs("密码")) then
flag = "1"
end if
Rs.movenext()
wend
if flag = "1" then
Rs.close()
else
Rs.close()
Response.Write "<center>对不起，此用户不存在或密码不正确，请重试！</center><p align='center'><a href='javascript:history.go(-1);'>点这里回上一页！</a>"
Response.End
End If
conn.close
%>