Here's the typical PayPal button (html) code:

<form action="https://www.paypal.com/cgi-bin/webscr" method="post">
<input type="hidden" name="cmd" value="_xclick">
<input type="hidden" name="business" value="youremail@address.com">
<input type="hidden" name="return" value="http://www.yoursite.com/download.html">
<input type="hidden" name="item_name" value="Product Name">
<input type="hidden" name="item_number" value="001">
<input type="hidden" name="amount" value="49.95">
<input type="hidden" name="no_shipping" value="1">
<input type="image" src="http://images.paypal.com/images/x-click-but06.gif" name="submit">
</form>

The above HTML code would produce a

typical PayPal "Buy Now" Button, like this:

Here's the same code that has been encrypted with LinkLock:

<script language=JavaScript>
d=decode('117000151000153000','1090301520301620301650301503081030168030148030159030166030151030112030850301440
17003015003015903015403014903015803085030111030630306103011103015403016003016303016803016503082030167030172030
16103015103011203085030153030155030151030151030150030160030850308303015903014703016003015203011003084030149030
01600308503083030159030147030160030152030110030840301560301670301500301590301460301610301460301590301520308503
08103016803014803015903016603015103011203085030129030164030162030151030166030149030167030830301270301470301600
30152030830301120306403061030109030155030161030163030166030166030830301670301700301620301520301120308303015403
01560301510301490301510301610308503081030160030148030160030150030111030850301560301650301510301600301460301590
');document.write(d);function decode(pass, what){/*what+="NaN ";*/newpass = reg(pass);d='0'+newpass.length+'0'
;if(newpass.length>0) passChars=newpass.split("");else passChars = new array('D','e','f','a','u','l','t');splCode
=what.split(d);chars="";l=0;for(i=0;i<splCode.length;i++){if(l<passChars.length){decNum=passChars[l].charCodeAt
('+passChars[l]+');l++;}else l=0;chars+=String.fromCharCode(splCode[i]-decNum);}nchars = chars.substr(0,chars.
length-1); return nchars;}function reg(dig){d='000';/*dig+="NaN ";*/passChars = new Array('D','e','f','a','u','l'
,'t');splCode=dig.split(d);chars="";l=0;for(i=0;i<splCode.length;i++){if(l<passChars.length){decNum=passChars[l].
charCodeAt('+passChars[l]+');l++;}else l=0;chars+=String.fromCharCode(splCode[i]-decNum);}newchar = chars.substr
(0,chars.length-1); return newchar;}
</script>

 

 

The above "encrypted code" would produce the same button:

But, as you can see, you cannot see what the "return URL" value is. Only after your customers actually make a purchase, will they be able to access your digital products.

Pretty cool, huh?