Can we find a Biss key with fake crypt8! for discussion.

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kebien

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sattechtips said:
OK, thanks

some guy say he made his own soft where is like TS offline decryptor and he decrypt right , after record some ts with wrong biss CW, he repair file, but he don't want to share how.
Click to expand...

At some point there was some public tool to encrypt with CSA,but the question goes to see if by doing this you will get back to the original encrypted file or something completely different.
At the beginning I thought you wanted to reverse CSA,I figure now you want to encrypt the file using this wrong key.
 
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abra26

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kebien said:
At some point there was some public tool to encrypt with CSA,but the question goes to see if by doing this you will get back to the original encrypted file or something completely different.
At the beginning I thought you wanted to reverse CSA,I figure now you want to encrypt the file using this wrong key.
Click to expand...

If I record channel with wrong key => decrypting with wrong key, so I can encrypt it back with same key and probably I will get it back. Now I can decrypt it with correct key.
No problem. (theoretically)
 
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sattechtips

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kebien said:
At some point there was some public tool to encrypt with CSA,but the question goes to see if by doing this you will get back to the original encrypted file or something completely different.
At the beginning I thought you wanted to reverse CSA,I figure now you want to encrypt the file using this wrong key.
Click to expand...

I start record some feed with biss cw, but after 1st half they change key, but i am not at pc and not see key is change and continue record with old key, i want to repair file and decrypt with correct key.

@abra26
How to encrypt again, what is way ?
 
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kebien

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It's been a while I do not see a CSA encryption tool,but I remember we played a bit with it at DVBN.
It should not be hard to make such a tool.
I'll check in old drives
 
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abra26

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kebien said:
It's been a while I do not see a CSA encryption tool,but I remember we played a bit with it at DVBN.
It should not be hard to make such a tool.
I'll check in old drives
Click to expand...

Yes, it's easy. You can build simple program for CSA encrypting with libdvbcsa library. For example.
 
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K2TSET

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I just made a small test on a ts I decrypted with a wrong CW then encrypted it again with the wrong CW and decrypted it with the right CW... I got picture :)
 
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K2TSET

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cockta said:
Instructions? How to work with that?
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Start the program, open the ts you want to encrypt
it will show a list of PID in the ts, remove the PID you want to encrypt
enter the CW in the tab field under the Control Word text (not easy to see the fields) there are 6 of them left og the encrypt button

press encrypt button and you will get a new file which are encrypted

You can decrypt another program called tsdec and you are back


The readme.txt tells a bit


DVB CSA Encrypter by [MOWER]

THIS PROGRAM IS FOR EDUCATION PURPOSE ONLY !!!!!


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Changes in the versions:
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[09.08.2005 Version 0.3]
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+program now analyze TS file for PID's.
+there is no need to OPEN evry time file to encrypt with different CW.Just change CW and click ENCRYPT button.
NOTE: You must remove PID's from List you want to encrypt.(it is opposite from last version)
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[11.07.2005 Version 0.2]
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+transport scrambling control field in the TS header is now set.
+added possibility to set PID's you don't want to encrypt.
+fix CSA encryption
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[11.07.2005 Version 0.1]
-----------------------------------------------------------------------------------
+initial version
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