Kako zavarovati Clickbank izdelek?

Eno vprašanje preden grem spat. A pozna kdo kak dober način kako zavarovati nek izdelek ki ga prodajaš preko clickbanka? ne mislim met statičnih htčmrlj strani da mi lahko vsak froc najde download link v guglu, zavaroval vi download page pa nevem kak, rad bi eno poceni zadevo ali pa še bolje free varianto

tole sem našel na netu ampak ne znam programirat v phpju tako da mi prav nič ne pomaga

<?php



$delivery = "/var/delivery.pdf";



$rcpt=$_REQUEST['cbreceipt'];

$time=$_REQUEST['time'];

$item=$_REQUEST['item'];

$cbpop=$_REQUEST['cbpop'];

$cbstr = "$rcpt,$time,$item,$cbpop";



$phpself = basename(__FILE__);

$_SERVER['PHP_SELF'] = substr($_SERVER['PHP_SELF'], 0, strpos($_SERVER['PHP_SELF'],$phpself)) . $phpself;



if ($_GET['action'] == "download") {



    if ($_COOKIE['ValidUser']) {

        if (md5($cbstr) == $_COOKIE['ValidUser']) {

            $fh = fopen($delivery,'r');

            header( "Content-type: application/pdf");

                while (!feof($fh)) {

                    $buffer = fread($fh,4096);

                    print $buffer;

                }

        }

    }

}



if (cbValid($rcpt,$time,$item,$cbpop)) {

    $cbstr = "$rcpt,$time,$item,$cbpop";    

    $value = md5($cbstr);

    setcookie("ValidUser", $value, time()+3600);



?>

<title> Good monkey </title>

You deserve a cookie.



<a href="<?echo $_SERVER['PHP_SELF']?>?action=download">Download now!</a>



<?



} else {



?>



<title> Bad Monkey </title>

Please don't steal my lame ebook. I spent countless minutes copying and pasting from other sources. I also like free shit, so plz pay me.

K. thx.



<?



}



function cbValid($rcpt,$time,$item,$cbpop)

{

  $key='YOUR SECRET KEY';



  $xxpop=sha1("$key|$rcpt|$time|$item");

  $xxpop=strtoupper(substr($xxpop,0,8));



  if ($cbpop==$xxpop) return 1;

  else return 0;

}



?>

http://www.e-junkie.com/

http://www.elicense.com

Hvala, na e-junkie se ne morem registrirat ker za plačilo preko paypala ti preverijo expiration date kreditne kartice tako da to odpade čeprav mi je ta možnost najljubša

elicense bom pogledal, hvala