Re: Idea: The ultimate CD/DVD auditing tool
At 03:08 PM 7/6/03 +0300, Sampo Syreeni wrote:
. A writing drive capable of working at such a low level could be used to experiment with new encodings beyond what standard CD's can do -- say, substituting CIRC with RSBC and gaining some extra room on the disc, getting rid of the subchannels, a more intelligent coding of disc addresses... Breaking compatibility wouldn't be too useful, but it
sure would be fun.
And think of the ulcers you would cause the TLAs! Assuming they got your disks and not your custom drive...
Now you simply can't do it.
There's a good reason why, viz: it would cost the drive developer to allow or export this flexibility. Since very few customers are sick enough :-) to want to invent their own incompatible formats it simply isn't worth their development-engineering time or end-product resources (eg gates) in such a commodity product.
There's a good reason why, viz: it would cost the drive developer to allow or export this flexibility. Since very few customers are sick enough
This will go the same way as radio. First, you have hundreds of separate boxes, each doing some custom modulation/frequency gig (am, fm, shortwave, TV, cell, spread spectrum, whatever) and you had to have a separate apparatus for each instance. With software radio, you just have one box that can do it all (and it made all protection-by-custom-modulation obsolete ... I've seen it playing "protected" HDTV signals.) So it's easy to imagine universal "software" disc player/recorder that let's one do any modulation technique. Not that it would provide protection, because the same tools will be available to attackers, but at least the crypto may become more fun, going back to physical domain. ===== end (of original message) Y-a*h*o-o (yes, they scan for this) spam follows: __________________________________ Do you Yahoo!? SBC Yahoo! DSL - Now only $29.95 per month! http://sbc.yahoo.com
On 2003-07-06, Major Variola (ret) uttered to cypherpunks@lne.com:
There's a good reason why, viz: it would cost the drive developer to allow or export this flexibility.
But that's just the point. They need to have the raw signal available at one time or another. Picking it up and sending it down the line should be utterly trivial, too. It will have its price, but the price will also be negligible. Especially since the ATAPI protocol has steadily grown more complicated, which would suggest they are making libraries to handle it in a standardised fashion. If they have such a library, and the raw data, why shy away from yielding it to the user? I mean, the cost is far less than, say, implementing digital rippping capability in the first place, with the available chips. I'd guess either because of a) terminal stupidity or b) benefits to scale in making it sure people go with compatibility. As there probably have to be some limits to how stupid engineers capable of making things like writable CD's can be, I'd have to go with the second alternative. -- Sampo Syreeni, aka decoy - mailto:decoy@iki.fi, tel:+358-50-5756111 student/math+cs/helsinki university, http://www.iki.fi/~decoy/front openpgp: 050985C2/025E D175 ABE5 027C 9494 EEB0 E090 8BA9 0509 85C2
participants (3)
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Major Variola (ret) -
Morlock Elloi -
Sampo Syreeni