This is probably why I bought (OK, got my parents to buy:-) only Technic sets. Which were made in 99% of generic parts and made creating pretty much everything possible. Being the elitist bastard, I thought that Space sets were for little kids;)
Yes. My point still stands though, the key and decryptor have only been moved (to hardware); they are still in user's possession. BTW, if you have a trusted system in a VM, it invalidates the point; a VM supervisor is expected to be able to grab screen;)
The problem isn't with Open Source. The problem is with DRM; all DRM schemes, namely, assume storage of keys on user's computer at some point (if it's pay-per-view, in which case the keys are sent to the user from a remote location). This means that given the full source of the DRM implementation it is possible to circumvent it. This is a design flaw in DRM.
DRM is the idea of storing keys with the encrypted content and hoping that nobody will find the keys.
Designing and fabbing a board like this would take me probably like a few days from home junk (really). But the problem is not technical - the board would be illegal.
Surface mounting is not that bad, by the way. BGAs are the only thing that is a problem:)
Re:They aren't as dangerous as before
on
Ma Bell is Back
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· Score: 2, Funny
Yeah, I'm just trying to get DSL even though I *have* their phone service, and I can't - their page tells me I'm not a customer of SBC:/
Most EEs from my University (like me) like and enjoy using Linux, and CSs don't. Weird. Maybe CS teaches the "just use it" kind of thinking, while EE teaches the "poke it to see what happens" mentality?
Does it mean that Windows is, finally, going to be ported to Intel x86? Oh well, it must have finally happened with all those non-commodity hardware in use.
OK, I'll be nerdy and needlessly anal now. But hey, I love signal theory.
Interpolation (at least in the principle) works like this: you fill stuff between samples with zeros. This way you get heavily aliased signal (because it looks like this: 1.5 0 0 0 4.6 0 0 0 -2 0 0 0 etc., so its spectrum is convoluted with a comb, or simply speaking repeated on the frequency axis). Then you pass this through a low-pass filter that cuts off the aliases.
The shape of this lowpass filter is critical. The "ideal" case would mean cutting off all frequencies over the Nyquist frequency (half of original sampling frequency). This corresponds to a sin(t)/t shape filter in time domain, which maps (via a Fourier transform) to a rectangle in frequency domain. A capacitor corresponds, on the other hand, to an exp(-t) filter in time domain, which maps to something very much like exp(-f) in frequency domain.
Cubic curves, on the third hand, use a still different filter (in fact they are not nearly as simple to describe as the cases described above). Usually the idea is to approximate the ideal sin(t)/t filter. So no, a capacitor is not the same as cubic splines.
Note: I am simplifying stuff here:)
BTW. It is perfectly possible to make stuff sound "better", for most people it's enough to emphasize some bass;)
The "Trusted Computing" might be billed as a solution to this problem. And indeed, restricting the software so that it can not emulate another computer / perform man-in-the-middle attacks might be the only way to secure this.
So, the Flash-disk based systems might in the end turn out to trade convenience for freedom.
I know, I'll get moderated to death for suggesting this:)
It is not that bad. Most NAND Flash chips I have seen are specified for 10^5 - 10^6 writes. Sure, it might be too little for a swap file, but it is enough for documents.
There are also techniques that balance the wear on NAND Flash cells; they are probably implemented in every USB Flash drive to date.
There is a possibility to make a HDMI decoder. For instance, the signals will have to be converted into a non-encrypted form for display inside the LCD panel. Even if they are analog there, it's perfectly possible to capture them with very decent quality (8-bit per component is perfectly possible at the HD pixel clocks).
Of course they may pot the whole LCD assembly in resin:)
Actual measurements of transfer on Ethernet 100Base-TX show that the achievable bandwidth is about 12 MB/s inside HTTP. So there is definitely no reason for DVDs to skip.
As a sidenote, even cheap (Intel Desktop Pro/1000) Gigabit Ethernet cards show speeds in excess of 60-70 MB/s.
Yeah, that would really rock. However it would mean the system would have to be written very well to isolate the restricted area from the non-restricted one. And with overall Sony coding it's unlikely, and it'd be just another piracy gateway.
Still, it sounds like a beautiful dream to me:)
Should be possible, yes, to run Linux on the PSP. Although probably a MMUless version, and with some serious reverse engineering to go. -- Skylark (and I did NOT write the downgrader. MPH did, in case anybody wonders)
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This is probably why I bought (OK, got my parents to buy :-) only Technic sets. Which were made in 99% of generic parts and made creating pretty much everything possible. Being the elitist bastard, I thought that Space sets were for little kids ;)
Yep. Sparks and then the screwdriver melts. You can do it with your car battery. :)
Yes. My point still stands though, the key and decryptor have only been moved (to hardware); they are still in user's possession. BTW, if you have a trusted system in a VM, it invalidates the point; a VM supervisor is expected to be able to grab screen ;)
The problem isn't with Open Source. The problem is with DRM; all DRM schemes, namely, assume storage of keys on user's computer at some point (if it's pay-per-view, in which case the keys are sent to the user from a remote location). This means that given the full source of the DRM implementation it is possible to circumvent it. This is a design flaw in DRM.
DRM is the idea of storing keys with the encrypted content and hoping that nobody will find the keys.
If a SMP machine can be efficiently replaced by a cluster, it should be replaced. It's that simple. They're simply different market niches.
Pity Xilinx discontinued the XC6200 series... It was documented in such detail it was practically open source.
Designing and fabbing a board like this would take me probably like a few days from home junk (really). But the problem is not technical - the board would be illegal.
:)
Surface mounting is not that bad, by the way. BGAs are the only thing that is a problem
Yeah, I'm just trying to get DSL even though I *have* their phone service, and I can't - their page tells me I'm not a customer of SBC :/
Most EEs from my University (like me) like and enjoy using Linux, and CSs don't. Weird. Maybe CS teaches the "just use it" kind of thinking, while EE teaches the "poke it to see what happens" mentality?
Your spending habits apparently don't include LOTS of computers/chips/electronics. And I thought I was here on /. between fellow nerds...
"Took me all day"...
Is it me or Ethereal should make it a *tad* easier?
And the best way to get $$$ is to work for MPAA. Just like the parent poster :)
Isn't this exactly how USPTO works?
Does it mean that Windows is, finally, going to be ported to Intel x86? Oh well, it must have finally happened with all those non-commodity hardware in use.
Erm. Oops.
Unix is a registered bell of AT&T Trademark Laboratories.
No, I don't use UNIX.
OK, I'll be nerdy and needlessly anal now. But hey, I love signal theory.
:)
BTW. It is perfectly possible to make stuff sound "better", for most people it's enough to emphasize some bass ;)
Interpolation (at least in the principle) works like this: you fill stuff between samples with zeros. This way you get heavily aliased signal (because it looks like this: 1.5 0 0 0 4.6 0 0 0 -2 0 0 0 etc., so its spectrum is convoluted with a comb, or simply speaking repeated on the frequency axis). Then you pass this through a low-pass filter that cuts off the aliases.
The shape of this lowpass filter is critical. The "ideal" case would mean cutting off all frequencies over the Nyquist frequency (half of original sampling frequency). This corresponds to a sin(t)/t shape filter in time domain, which maps (via a Fourier transform) to a rectangle in frequency domain. A capacitor corresponds, on the other hand, to an exp(-t) filter in time domain, which maps to something very much like exp(-f) in frequency domain.
Cubic curves, on the third hand, use a still different filter (in fact they are not nearly as simple to describe as the cases described above). Usually the idea is to approximate the ideal sin(t)/t filter. So no, a capacitor is not the same as cubic splines. Note: I am simplifying stuff here
News at 11.
Seriously, does anybody expect Redhat's CEO to announce that "Novell is a serious contender, and Redhat is about to lose market advantage"?
Exactly. Me too.
Which is why the idea of the article is scary to me. I just wanted to point it out.
The "Trusted Computing" might be billed as a solution to this problem. And indeed, restricting the software so that it can not emulate another computer / perform man-in-the-middle attacks might be the only way to secure this.
:)
So, the Flash-disk based systems might in the end turn out to trade convenience for freedom.
I know, I'll get moderated to death for suggesting this
It is not that bad. Most NAND Flash chips I have seen are specified for 10^5 - 10^6 writes. Sure, it might be too little for a swap file, but it is enough for documents.
There are also techniques that balance the wear on NAND Flash cells; they are probably implemented in every USB Flash drive to date.
There is a possibility to make a HDMI decoder. For instance, the signals will have to be converted into a non-encrypted form for display inside the LCD panel. Even if they are analog there, it's perfectly possible to capture them with very decent quality (8-bit per component is perfectly possible at the HD pixel clocks).
:)
Of course they may pot the whole LCD assembly in resin
Actual measurements of transfer on Ethernet 100Base-TX show that the achievable bandwidth is about 12 MB/s inside HTTP. So there is definitely no reason for DVDs to skip.
As a sidenote, even cheap (Intel Desktop Pro/1000) Gigabit Ethernet cards show speeds in excess of 60-70 MB/s.
Yeah, that would really rock. However it would mean the system would have to be written very well to isolate the restricted area from the non-restricted one. And with overall Sony coding it's unlikely, and it'd be just another piracy gateway. Still, it sounds like a beautiful dream to me :)
Mod parent funny :)
Should be possible, yes, to run Linux on the PSP. Although probably a MMUless version, and with some serious reverse engineering to go. -- Skylark (and I did NOT write the downgrader. MPH did, in case anybody wonders)