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boomer
08-24-2004, 07:46 PM
Hi - I am not a programmer, I need help, and I am willing to pay for the development/programming required to solve the problem below.

I have used Camtasia for several months now to create Linux "CD Video Tutorials" in Flash. These Tutorials are supplemental material for my book "Hello Linux!" and will be included in the book when they are completed - shortly. I have created nine hours of CD Video Tutorials for this book so far and I have several more hours to create.

These Flash tutorials need to be able to be viewed in a browser in Windows and a browser in Linux. A .exe file is not used to display these tutorials.

I do not have control over the creation of the Flash (.swf) file, as this is done by Camtasia. The .avi files are "produced" out of Camtasia to .swf files.

I run Camtasia (in Windows) to record the Linux screen and the audio and the Linux screen is recorded as a .avi file and the audio is also recorded and then output from Camtasia as a four files (the largest and most important one being the .swf file).

The four files are: a .html file, which is used to launch the "large" .swf file, a "large" .swf file that contains the content (screen animation and audio). There is also a small .swf file with the name of "filename_controller.swf" and I think this provides the Flash controls, such as Play, Stop and Pause at the bottom of the screen. The other file has the name of "filename_controller.xml".

You can see examples of these tutorials at www.lancom-tech.com. Select "Sample CD Video Tutorials" at the left and then select a tutorial name to view it.

These tutorials represent a very large investment in time and I would like to do whatever is possible to protect them. I would like to be able to ensure that they are only running from a CD and that the CD is the original CD that we have created. In other words, the files should only run from the CD that is provided with the book. I am sure that I am not alone in this situation.

Please let me know if you have any possible solutions for this. I am not a programmer and I am willing to hire someone to help me solve this problem.

Sincerely,

Clyde Boom
Director, Technical Service
Lancom Technologies
:D :D :D :D :D :D

NTD
08-25-2004, 06:04 AM
Hi,

Security with Flash is very difficult to achieve since it is open source. There are lots of actionscript viewers that can disect any .swf file. Depending on your knowledge level of ecryption, it can help, but any .swf that you view can be opened up from the computers cache and viewed with something as simple as notepad or wordpad, then decrypted. You could add some basic file checking to make sure the files are being loaded off a CD, but your best bet is to post your copyright notice and hope it is respected and pursue any obvious breeches with legal action. Here is a nice thread that might be of some use. Towards the bottom it discusses flash protection and security. I am not very knowledgeable on security or backend features with flash, but maybe this will help....

http://www.flashkit.com/board/showthread.php?s=bad749c7b6b869d533946e0fd3eb8df8&threadid=326781&highlight=protection

Hope it helps
NTD