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HomeHomeUsing DNN Platf...Using DNN Platf...Administration ...Administration ...How to copy-protect flash files?How to copy-protect flash files?
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1/16/2008 2:16 PM
 
Ari

Joined: 4/1/2007
Posts: 71

Hi all,

How can I prevent users from copying, downloading or linking directly to flash swf files?

I have some eLearning that I'm running from the DNN-based site. The eLearning is built in Adobe Captivate and is published as .swf flash files. I'd like to apply some basic copy protection to this.

I have no idea how this could be done.

Thanks in advance,
Ari
 
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1/17/2008 4:52 AM
 
Erik van Ballegoij


Erik van Ballegoij's Avatar

erikvanballegoij.com
Joined: 4/7/2004
Posts: 4445

afaik as long as the user can see the swf file, he can download it (in fact, if the user is looking at the file, it is already downloaded to the browsers cache). You should at least add clear copyright messages to the file ... and have a little trust in your users....

Erik van Ballegoij, Former DNN Corp. Employee and DNN Expert

DNN Blog | Twitter: @erikvb | LinkedIn: Erik van Ballegoij on LinkedIn
 
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1/17/2008 3:12 PM
 

Joined: 1/1/0001
Posts: 0

At least to prevent direct linking to your swf files, this thread could be useful:
http://www.dotnetnuke.com/Community/Forums/tabid/795/forumid/108/threadid/182753/scope/posts/Default.aspx
 
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3/5/2008 10:47 AM
 
Ari

Joined: 4/1/2007
Posts: 71

I found another thing that will help with this: locking the flash files to your domain.

If you secure them in the DNN secure folders, they can only be downloaded by users with the appropriate permissions. However, those users can then distribute the flash files.... So, if you put the following actionscript on the first frame of the flash file, it will lock it to your domain (note that you need to replace the generic domain with your domain name into the action script before you publish it)

//Check to see that it is playing from MyDomain.com domain
//Note that there are local folders listed as acceptable domains.
//If you don't have these in the script, then you won't be able to
//preview the flash file locally before you upload it to your domain.
okToPlay = false;
siteURL = "http://www.MyDomain.com";
siteURL2 = "https://www.MyDomain.com";
localURL1 = "C:\\Your Flash Preview Folder\\Published";
localURL2 = "file:///C:/Your Flash Preview Folder/Published";
localURL3 = file:///C:/Your%20Flash%20Preview%20Folder/Published;

if ((_root._url.substr(0,siteURL.length) == siteURL) || (_root._url.substr(0,siteURL2.length) == siteURL2) || (_root._url.substr(0,localURL1.length) == localURL1) || (_root._url.substr(0,localURL2.length) == localURL2) || (_root._url.substr(0,localURL3.length) == localURL3))
{
okToPlay = true;
}
if (okToPlay == false)
{
_root.unloadMovie();
}

 
 
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