What is ACP?

ACP stands for Advanced Copy Protection – and that’s exactly what it does. ACP makes sure that all provided video content gets the best possible copy protection without your customers getting annoyed by complicated add-ons. ACP bases on the RTMP Protocol from Adobe but it has an higher Security Level and thru this it is not compatible to the published specification that you can find in the internet.

How does ACP work?

Via the Slot3 flash library, client and server exchange a “handshake” at first server request, containing a 96-bit encrypted randomised key. Simultaneously, the handshake checks for the client’s correct domain. Moreover, a corresponding TCP package containing the referrer is transmitted – providing more safety than just the standard HTTP-referrer.

After matching the client’s key and domain a new encrypted key is retransmitted to the Slot3 server. Only now the necessary library is transmitted from server to client –repeating the process for every further connection.
The VCS library itself is encrypted and embedded in the loaded flashplayer. Furthermore, FLV, Mp4, Mov, 3GP can be dropped in designated and secured folders – only to be opened and played by the client via another key generated, for example, by a Pay Soloutions Gateway.


Why using both HTTP and ACP?

Under certain rare circumstances the RTMP protocol can’t be accessed client-side – for instance, if a proxy explicitly blocks the transmission of RTMP requests or packages. To correct this, the ACP / RTMP streaming immediately can be switched to HTTP streaming in real time.

Does the Slot3 ACP differ from Adobe® RTMP?

Yes. ACP is not compatible with the RTMP-specifications of Adobe Flashmedia Server´s. That is not a minus point cause all ripping tools uses excatly this standard protocol specification to rip your content.

Which versions of the Flash Player are supported?

Currently, Slot3 supports flash player 7, 8, 9 and 10 both for PC and MAC.

Which iPhone Device is supported?

Currently, Slot3 supports iPhone and iPhone 3G with OS Version 3.0.

Which video formats/File Container can be transmitted via Slot3?

At present, we support Adobe’s FLV / F4V-Forma, Mp4, Mov, 3GP. For Silverlight we support WMV and VC-1. For Apple´s iPhone we Support Mp4 with H.264 Baseline Profile and AAC Audio Codec