5c-dtcp Decrypting

[edo1080]

Does anyone know how to decrypt 5C-DTCP ?

I've tried to capture a D-theater tape through firewire using capDVHS 0.3.0.6 E ; it's perfectly working with not encrypted D-VHS tapes, but it gives an unplayable file (obviously) using D-Theater tapes.

I'm sure the D-THEATER stream goes out through firewire because people say the play without problems it on TVs and displays with IEEE 1394 input, when the firewire output of HM-DH30000 (for example) is linked to that input port.

I've tried to capture when my D-VHS deck is on "stop" and the file I get is 720x480 and 29,76 fps (data shown by capDVHS): the PC is probably capturing the JVC deck menu on screen; when using not encrypted tapes resoultion is 1920x1080 (always shown by capDVHS) but when capturing a D-Theater tape nothing is shown in capDVHS fields, anyway the file is not empty, it's about the same size of the one I got with encrypted tapes (capturing for the same time about 2 min)but is not recognized by any progam even if it has the .ts extension given by capDVHS.

I think that the stream is encrypted with 5C-DTCP protection of D-Theater tapes.

[calinb]

Does anyone know how to decrypt 5C-DTCP ?
To my knowledge, 5C remains un-cracked. The only way to backup a 5C-protected D-Theater tapes is to capture the analog, which can't be done in HD resolution using existing consumer electronics devices (and the MPAA is trying to outlaw future A/D converters unless they are licensed by the MPAA!)

There are a few medical and industrial imaging capture cards that could be used to do it. However, they're very expensive and you'd probably need to write some software or configure the exisiting aps to do it.

[edo1080]

I supposed it was so, thank you