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What is SWF Verification? Can I save/record streams protected with SWF verification?

 (http://stream-recorder.com/forum/showthread.php?t=4190)

any ANONYMOUS forum user 06-23-2009 09:57 AM

What is SWF Verification? Can I save/record streams protected with SWF verification?


 
What is SWF Verification?

SWF Verification is an Adobe copy protection mechanism employed by some sites streaming over RTMP and RTMPE:

Quote:
Originally Posted by Adobe
SWF verification in Flash Media Server is a security feature that allows you to directly control which SWF files can connect to your server. Without implementing this feature, any SWF with the proper connection Uniform Resource Identifier (URI) and application name could freely
connect, potentially accessing your streams and using server resources.

With SWF verification, you can configure the server to check that the SWF file attempting to access a certain application or application instance belongs to a group of preapproved SWF files.

Enabling this feature in FMS is easy. You simply store a copy of the approved SWF file in the application directory and turn on the feature in the Application.xml file. When a SWF file connects to the server, the server verifies that the file exactly matches the SWF file in your application
directory, and then accepts the connection.

To approve a SWF file for any instance of a certain application, you place it in the SWFs directory in that application’s folder. To approve a SWF file for a specific instance, you place it in the SWFs directory inside that instance’s folder. This feature has been enhanced in Flash Media Server 3.5 to allow verification of SWF files without requiring copies on the server computer. You can now use the File plug-in to retrieve SWF files that are stored in distributed locations.
Here is the problem that SWF verification solves that secureToken does not solve. Decompiling an SWF file can reveal the secureToken shared secret. Then you can build your own swf to use the same key and steal all of the content you want. Decompiling an SWF is very easy. If I have an ad supported video service and I use secureToken, you could decompile my player, steal my secret key and release an 'ad free' version of my video player. You could even make your own player which does not even mention my website and just use my backend to serve all of your own users. While secureToken is a good start, using this in combination with SWF verification is the only reasonable way to protect content usage on other web-sites.

Although it is illegal for streaming video recording software to break any form of copy protection mechanism or digital rights management (DRM) due to violation of DMCA, it is possible to download/save/capture/record streams with SWF verification.


Is it possible to download/save/capture/record RTMP and RTMPE streams with SWF verification?
It is illegal in the U.S. to develop software that can download RTMPE streams or streams with SWF verification, because such programs violate DMCA.

rtmpdump project was taken down by Adobe, but the latest version of this freeware open-source command line utility was able to download RTMP and RTMPE streams, including the ones using SWF verification.

Replay Media Catcher 4 (Jaksta) can also detect these protected streams. Where possible it will try to record the stream as it plays in your browser instead of trying to download it (it can dowload RTMP streams only, not RTMPE streams). If this is not possible you will receive an error starting the stream is protected using SWF Verification.


If you can't record a protected stream, you may try to find another web-site that doesn't use any copy-protection mechanisms.
You can also contact the support staff of this web-site letting them know that you won't be returning to their site if they continue to employ such measures. You have paid for your computer and your Internet connection to get to their site and you should be able to view the content as and whenever you desire.

any ANONYMOUS forum user 06-24-2009 08:41 AM

Re: What is SWF Verification? Can I save/record streams protected with SWF verificati


 
If somebody pays to see this content at least has the right to download this.

HS

Stream Recorder 07-06-2009 04:20 AM

Re: What is SWF Verification? Can I save/record streams protected with SWF verificati


 
Flash Stream Hunter can capture streams from Flash Player. However I can only recommend it if Replay Media Catcher 4 (Jaksta) doesn't work for you.

hyc 02-02-2010 03:52 AM

Re:What is SWF Verification?Can I save/record streams protected with SWF verification


 
crs: SWF Verification is not a copy protection mechanism. Nor is it an effective technological measure of any kind really. The only thing it is effective at is wasting CPU cycles and electricity. (But then again, that's true of "real DRM" too...)

An "effective copy protection mechanism" is one that effectively limits how many copies can be made. SWFs are freely distributed on web servers; they are copied limitlessly, without any restrictions, in the normal course of their use. Adobe is blowing smoke when they claim SWF Verification has any pertinence to the DMCA.

Stream Recorder 02-02-2010 04:05 AM

Re:What is SWF Verification?Can I save/record streams protected with SWF verification


 
Quote:
Originally Posted by hyc (Post 16162)
crs: SWF Verification is not a copy protection mechanism. Nor is it an effective technological measure of any kind really. The only thing it is effective at is wasting CPU cycles and electricity. (But then again, that's true of "real DRM" too...)

An "effective copy protection mechanism" is one that effectively limits how many copies can be made. SWFs are freely distributed on web servers; they are copied limitlessly, without any restrictions, in the normal course of their use. Adobe is blowing smoke when they claim SWF Verification has any pertinence to the DMCA.
Jaksta used to have support of SWF verification, so I guess crs is perfectly aware of the weakness of the protection offered by Adobe.

While the mechanism itself is not effective, combined with successful efforts of Adobe to remove support of RTMPE and SWF verification from most of the programs including Jaksta, Replay Media Catcher, save2pc Ultimate,... it can be considered effective.

crs 02-03-2010 01:36 AM

Re:What is SWF Verification?Can I save/record streams protected with SWF verification


 
Quote:
Originally Posted by hyc (Post 16162)
crs: SWF Verification is not a copy protection mechanism. Nor is it an effective technological measure of any kind really. The only thing it is effective at is wasting CPU cycles and electricity. (But then again, that's true of "real DRM" too...)

An "effective copy protection mechanism" is one that effectively limits how many copies can be made. SWFs are freely distributed on web servers; they are copied limitlessly, without any restrictions, in the normal course of their use. Adobe is blowing smoke when they claim SWF Verification has any pertinence to the DMCA.
Sorry SWF Verification is a copy protection mechanism as defined by the DMCA - "in the ordinary course of its operation, prevents, restricts, or otherwise limits the exercise of a right of a copyright owner.". SWF Verification, in the ordinary course of its operation limits which SWF's can connect to which RTMP/E streams. The fact that it is well known how SWF Verification works is irrelevant. RTMPE on the other hand is a standard Diffie–Hellman key exchange to enable RC4 encryption between a client and a server thus encrypting the content in transit and is not intended to stop non authorized clients from connecting. This is stated in many places on Adobes website. Several tool producers have been sued by adobe - I dont want to be the next one and I respect a content owners right to limit downloading if they so choose.


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