Vulnerability Development mailing list archives
Re: hacksdmi?
From: "Granquist, Lamont" <lamont () ICOPYRIGHT COM>
Date: Sat, 14 Oct 2000 16:01:06 -0700
On Fri, 13 Oct 2000, Blue Boar wrote:
OK, here's another tangent to the issue: Why do they (RIAA?) want a watermark in the first place? What can you do with it? Here are the possibilities I see: 1 Watermark must be present to play in an SDMI player. 2 Watermark can be used to trace origin of music 3 Watermark is designed to intentionally degrade sound quality 4 Reliable identifier of a particular piece of music 5 Lack of watermark denotes something What am I missing?
I think the idea is that they tag the content that you download off of a website with a watermark, then they run it through some kind of encryption/compression algorithm to the SDMI format. The client that you use to download this is the same client that you use for playback. The watermark is tagged with a specific key which will only allow you to play it back on the client that you used to download it. Therefore, if you give the SDMI-encoded file to your friend they will not be able to play it on their player since it has a different key. This is similar to your #1, but the goal is to watermark so it can be played in *only one* SDMI player, thereby to prevent sharing by 90% of the people out there. That seems like goal #1. Goal #2 is probably your #2 above. That means that if someone does do an D/A->A/D->MP3 on the music and distributes it that they will be able to automate the process of discovering the illegal mp3s and they will be able to track down who is downloading and distributing them. The fact that SDMI will probably use some kind of encryption also makes people (yes, in the USA... for now... watch out...) suable under the DMCA.
Current thread:
- Re: hacksdmi?, (continued)
- Re: hacksdmi? Masial (Oct 13)
- Re: hacksdmi? spiff (Oct 14)
- Message not available
- Re: SDMI - The way I would make the water mark. Ralph Moonen (Oct 14)
- Re: hacksdmi? Bluefish (P.Magnusson) (Oct 11)
- Re: hacksdmi? Bluefish (P.Magnusson) (Oct 11)
- Re: hacksdmi? Steve Mosher (Oct 12)
- Re: hacksdmi? David Knaack (Oct 12)
- Re: hacksdmi? Robert Johnson (Oct 13)
- Re: hacksdmi? Robert A. Seace (Oct 13)
- Re: hacksdmi? Steve Mosher (Oct 12)
- Re: hacksdmi? Granquist, Lamont (Oct 14)
- Re: hacksdmi? Ben Galehouse (Oct 15)
- Re: hacksdmi? David Knaack (Oct 16)
- Re: hacksdmi? Ralph Moonen (Oct 12)
- Re: hacksdmi? Steve Mosher (Oct 12)
- Re: hacksdmi? Bluefish (P.Magnusson) (Oct 19)
- sdmi info Phosgene (Oct 20)