Vulnerability Development mailing list archives
Re: hacksdmi?
From: Joseph Pingenot <jap3003 () ksu edu>
Date: Tue, 17 Oct 2000 11:08:26 -0500
From Brooke, O'neil (EXP) on Monday, 16 October, 2000: This maybe a silly question but, couldn't they put a watermark into the sound by using sounds that we cannot hear? Very high or very low frequencies could be used, so could sounds that will be overpowered by the watermarked content. (note: this would entail the creation of new sounds, not simply the tweaking of existing sounds within the content) If frequency hoping is used in the algorithm it may be difficult to know where these watermark sounds are located.
Easy to crack: simply filter out the non-audible sounds. There is no audible loss in the music, as the tones filtered out (and the watermark) are all outside of this range. The tech already exists to do this with the analog signal; the phone company does it, although much more extreme; various other things do it too. Basically, a watermark has to: a) Be secure even if the algorithm is known (there are those determined enough to read the disassembled ASM from the binary, or even the opcodes!) b) Cause the data to be irrevocably lost or at least very severely corrupted if the watermark is stripped I would keep expanding upon this, but I don't really *want* SDMI pay-per-listen. I'd rather actually *own* a copy of the song (and for reasonable prices, do you hear me, RIAA? $17 for a CD is outrageous, considering the quantity demanded and the price of the medium. Maybe you'd have less problem with Napster et. al. if you viewed them as a *symptom* instead of a *problem* and took action appropriate to *that* model. It's the evolution of the market with technology and active capitalism, maybe? But that's more of a line of thought for a paper, not a parenthesis-comment. :) -Joseph -- Joseph==============================================jap3003 () ksu edu "I felt a great disturbance in the force. As if a significant plot line suddenly cried out in terror... and was suddenly silenced." -Torg in "Sluggy Freelance" www.sluggy.com.
Current thread:
- Re: hacksdmi?, (continued)
- Re: hacksdmi? David Knaack (Oct 16)
- Re: hacksdmi? Jord Sonneveld (Oct 11)
- Re: hacksdmi? aliver vilereal (Oct 12)
- Re: hacksdmi? Ralph Moonen (Oct 12)
- Re: hacksdmi? Steve Mosher (Oct 12)
- Re: hacksdmi? Everhart, Glenn (FUSA) (Oct 12)
- Re: hacksdmi? Brooke, O'neil (EXP) (Oct 16)
- Re: hacksdmi? Bluefish (P.Magnusson) (Oct 19)
- sdmi info Phosgene (Oct 20)
- Re: hacksdmi? Steve Mosher (Oct 20)
- Re: hacksdmi? Joseph Pingenot (Oct 20)
- Re: hacksdmi? Richard Rager (Oct 24)
- Re: hacksdmi? Erhard Schwenk (Oct 24)
- Re: hacksdmi? Ian Stoba (Oct 20)
- Re: hacksdmi? Christian (Oct 24)
- Re: hacksdmi? Bluefish (P.Magnusson) (Oct 24)
- Re: hacksdmi? Damian Menscher (Oct 24)
- Re: hacksdmi? Vitaly Osipov (Oct 27)
- Re: hacksdmi? Knud Erik Hojgaard - CyberCity Support (Oct 27)
- Re: hacksdmi? Blue Boar (Oct 27)