The Add descrambling technology of dream box

Add descrambling technology is used to encrypt and decrypt digital programming. The basic principle is to use the control word scrambling encryption transmission method, using IC card to decrypt the client.

In the MPEG transport stream, transport-related and control words have two data streams: authorization control information (Elms) and authorization management information (Emmis). By the service key (SK) encrypted control words in Elms after the transfer, including program source, time, content classification program information and program price.

On the control word encrypted service key information in the transfer authorization management, and key business users to go through before sending personal distribution of key (PDE) of the encryption processing. Emmis also includes addresses, user authorization information, such as the user can watch the program or time period, users pay subscription fees and so on. User profile assigned key (PDK) stored in the user's smart card (Smart Card), in the client, dream box boxes based on PMT and CAT tables CA-descriptor, to obtain the PID value of the EMM and ECM, and then filter out from the TS stream Elms and Emmis, and sent through the Smart Card Interface Smart Card.

Smart Card user profile assigned to read the first key (PDK), with the PDK to the EMM decrypting, remove the SK, then use SK to decrypt on the ECM, remove the CW, and CW Smart Card interface, given by descrambling engine, descrambling engine CW can be used have been scrambling to descramble the transport stream.

Function and information of Dreambox 500

As the same time press Dream box front panel of three buttons to restart the Dream box.

Dream box can play MP3 and Gog Vertis two audio files, but also its hard drive, USB Memory Stick or CF card images slide presentation. There are many Internets plug-ins available for downloading the image can be in the directory in direct Dream box choice. If you insert a CF card, it will be activated automatically when loaded to / add, so when using the exchange of documents to be careful. Watching television, press the blue button, the use of encrypted information will be displayed, and let you choose the corresponding emu. Certain image storage for each channel selected under the emu. If you web browser input dreambox 500c IP address (in this case for 192.168.0.24), you can change the channel and remote access EPG.

Well, I spent a lot of time writing these things, and I hope you will find this guide useful and easy for you to use. I want to thank those creative Dream box image of the authors, such as Gluten, RU dream, Misters, Sand Box, Hybrid, Hydra, Ned Kelly, SF team, DBF, Araucaria, Neutrino, Peter Pan, etc.. Thank you so dreambox 500c become so interesting. In addition to all EMU should also extend my thanks to the author? At the same time, I also encourage readers to contribute to those who provide free tools for Dream box people. Thank Sat-Industry Forums and Dream box Net Australia; I began to help dreambox 500c trip friends.

Congratulations Sand Box Team, they set up a French site and forums, and created a good sandbox image. Special thanks Doom9 help amend my articles in English and French and his great reference site.