Re: need confirmation of DVD/CSS crack in China ...
Ernest Hua (hua@chromatic.com) wrote:
Third, the entertainment industry giants will have to improve and agree on an encryption technology. The current 40-bit encryption standard used on DVD discs, which is supposed to stop copyright pirates, has already been cracked in China. Stronger encryption, however, forces PCs and players to run at a crawl. Partially as a result, Fox, Paramount, and Disney have not committed to producing materials on DVD, Burdon noted.
DVD encryption is described on the Web at: http://www.kipinet.com/tdb/tdb_oct96/feat_protection.html There's a very simple way to 'break' it - you just copy the entire disk. Key-size is irrelevant. As the article itself says: "While copy protection for DVD is often mistakenly referred to as "anti-piracy," it does not in fact provide much of a deterrent to those who would produce illegal discs on a mass scale." Or in other words, it will do nothing to stop the Chinese, it's simply intended to prevent you and me from copying disks and giving them to our friends. This is, of course, inevitable from the nature of the technology. As has been discussed many times in the past, this kind of scheme just can't work. Since that article is a few months old and talks about the big movie company's desire for a mandatory standard and laws against the sale of any machine which allows access to unencrypted data, I'd guess that this new article is FUD to persuade Congress to pass the laws. (Now explain to me why I'd want to buy yet another video format which can't even record?) CopyMonger
At 07:30 AM 8/28/97 DST, Jenaer Mixmaster Anonserver wrote:
DVD encryption is described on the Web at:
http://www.kipinet.com/tdb/tdb_oct96/feat_protection.html
There's a very simple way to 'break' it - you just copy the entire disk. Key-size is irrelevant.
I fail to see how you can prevent copying an entire disk. If the controller can access the data, I can copy it. Unless of course it will be made illegal to sell DVD controllers that output the raw data stream. Come to think of it, that must be coming. --Lucky Green <shamrock@netcom.com> PGP encrypted mail preferred. DES is dead! Please join in breaking RC5-56. http://rc5.distributed.net/
-----BEGIN PGP SIGNED MESSAGE----- At 12:40 AM 8/29/97 -0700, Tim May wrote:
The way it was done with DAT (Digital Audio Tape), the product similar to DVD in so many ways, was to restrict the availability of DAT recorders which could faithfully record the output of other DAT machines. The SCMS system, or "Serial Copy Management System," has been in all consumer-grade DAT machines.
The DVD folks have also divided the world up into regions that use a different DVD standard (China is one all by itself) and they hope to minimize international copying. DCF -----BEGIN PGP SIGNATURE----- Version: PGP for Personal Privacy 5.0 Charset: noconv iQCVAwUBNAbX0IVO4r4sgSPhAQEkXQQAjGoLGjPtYSKvPHy1vVhKa25A+MD6SW6F qOHr5QHSHi73XgCNe200WEMBAlE1yFVF+cfNs2ivALojEASt4PMLKzMcWB1o9dH0 i//AEf0JpVjdpJetSjunOsiwfGoE0eA45vVgYVoP3tWATtQmSoE1X/1rm2gnS30P L7TyFRbxUuw= =/gcK -----END PGP SIGNATURE-----
At 10:44 PM -0700 8/28/97, Lucky Green wrote:
At 07:30 AM 8/28/97 DST, Jenaer Mixmaster Anonserver wrote:
DVD encryption is described on the Web at:
http://www.kipinet.com/tdb/tdb_oct96/feat_protection.html
There's a very simple way to 'break' it - you just copy the entire disk. Key-size is irrelevant.
I fail to see how you can prevent copying an entire disk. If the controller can access the data, I can copy it. Unless of course it will be made illegal to sell DVD controllers that output the raw data stream.
Come to think of it, that must be coming.
The way it was done with DAT (Digital Audio Tape), the product similar to DVD in so many ways, was to restrict the availability of DAT recorders which could faithfully record the output of other DAT machines. The SCMS system, or "Serial Copy Management System," has been in all consumer-grade DAT machines. Pro-grade DAT machines have no SCMS, or SCMS-defeat switch. And there are various SCMS defeaters widely available. --Tim May There's something wrong when I'm a felon under an increasing number of laws. Only one response to the key grabbers is warranted: "Death to Tyrants!" ---------:---------:---------:---------:---------:---------:---------:---- Timothy C. May | Crypto Anarchy: encryption, digital money, tcmay@got.net 408-728-0152 | anonymous networks, digital pseudonyms, zero W.A.S.T.E.: Corralitos, CA | knowledge, reputations, information markets, Higher Power: 2^1398269 | black markets, collapse of governments. "National borders aren't even speed bumps on the information superhighway."
participants (4)
-
Duncan Frissell -
Jenaer Mixmaster Anonserver -
Lucky Green -
Tim May