The Amazing ZamZiBam
The thread continues, but specifically this post is a response to CLINT where he mentioned a EFM...
Do not look at any limits of the reading device or the firmware which allows the actual error correction. I have a vague example, but it only argues how a CD-Rom drive operates. So this might explain something you missed. It is a vague example.
The CD-Rom is inserted. It is read. A threshold is standard to the CD-Rom specification, which allows for specific inconsistencies on the disc. In other words, it allows a certain amount of variation between data. This is something that is transparent to all users, as it basically denotes how a CD-Rom operates. This is however firmware and or software error correction for the simple reason as to allow further file formats to exist on the disc, allowing more powerful lasers and or CD-Rom drives to work at a more intense level and speed. In other words the data could be more condensed on a more powerful drive than it could on most standard drives. This threshold however as I said is basic to error correction. So to repeat myself, various errors are allowed that are standard to the operation of the drive and this is to allow various manufacturing processes to be compatible, because after all, not every manufacturer even though using the same concept and specification, makes the same quality disc. Now since we know there is a threshold, than we also know that the best cd-rom media coupled with the best drive on the market will work alot better not because of the basic speed and dataspace representation, but also because less correction will have to be made by the drive. With that said, there is something more obvious. CD-Rom Media manufacturing will always be one better than the other, but CD-Rom devices, can be duplicated so the chances of one drive being as good as the next is higher. This is not a concept now, this is fact. So I am saying just about every CD-Rom drive out there is capable of reading not so much at a specific speed but at a specific constant. Much like a scanner. So it does not matter if the data read is to be interpreted, it just has to know that a specific area has to be accessed. Everyone argues that this error will stop this and that. Look at it like this. put the CD-Rom on a scanner "DON'T ACTUALLY DO THAT" it's not an eprom but the same concept. Every time you scan the CD, it will scan a linear phase. TRUE?!. If you turn the CD at an angle and scan it again, it will do the same thing. Now imagine a PRISM and that is basically what the IOMEGA drive protection key looks like. Just two planes if you turn the CD-Rom and it scans it than if you have two squares that are at an angle, the deflection will be different, because it refracts different. Now imagine the CD-Rom that is not stationary. First of all we know that the read head will always be at the same position, relevant to the angle of the CD-Rom, so the planes can not be at different angles. CORRECT!?. O.K. This is STATIC, now DYNAMIC allows error correction, which will be at the same dataspace location, but will be corrected. The reason being, that the phyisical position and angle on't change, but the deflected angle will be different simply because the the drive will correct. Sort of like RAW as to DEFINED read. In other words, it's obvious that someone can crack that. It's practically saying. LOOK everyone, patch me here and the game will work, but the signature will not be duplicated. It's a simple as reading the same dataspace at 1X and at 24X. After all, why would you want to copy a protected CD at 1X, why do you get a better read. Because the slower speed allows more accuracy and as it corrects over and over, it is more likely to find the right answer. Where if you go faster, it does the same thing, but is less likely to be able to conform to a no error state. It's designed to conform to that idea so it takes away attention from what it really has. A signature. The concept is straightforward, but it's not as obvious. So that is the idea, but what is not obvious is that it's the actual MATERIAL that is impossible to find and using the same principle as the PRISM, the material can be altered. So this is a thin line between the actual operating concept of a CD-Rom drive and the actual physical ability for material to change it's properties. Much like a CDRW but it is not a CDRW drive, but those are the characteristics since you have polymorphic dataspace that can not actually be chaged without changing the properties of the material, which in turn can only change to the drives signature. All CD-Rom drives are different. SO ONE LAST TIME! Even though it can pick up a signature. Another software package, such as a FIRMWARE update will allow the DRIVE to provide an alternate signature. In other words, if the FIRMWARE is a registry key in Windows 2000 than it can be compromised by the CDR. Sounds funny, but as soon as people start getting logged off of game servers it will be more obvious. To security administrators, the dataspace will also be more obvious and perhaps the best intervention is the safest measure for high security systems. Once the CD was in that drive. It will never leave the facilities and etc. but that's getting into the legal information again.