QUOTE(Aldanga @ Jul 26 2011, 05:57 AM)
What you're supposing is correct. As I understand the security, challenges are performed on the angles of the disc, which aren't present on burned media. Retail discs are actually etched, while home discs are created using dyes. These consumer discs don't have the angles that retail discs have, so it's impossible to create a one-to-one copy and security data must be stored on the discs themselves rather than letting the drive calculate the values of the challenges. Since retail discs have are etched, the drive can always calculate the challenges, and C4E has built this into his custom firmware.
There might be other reasons for not being able to create a one-to-one copy, but those are the most that my tired brain can muster at this late an hour.
Awesome explanation. MS can create a challenge that can only be successfully responded to from an offical pressed copy. These were known (only 5 possible challenges for game for example) and they were ripped and stored on the burnt disc. When a challenge was called, this table was read and the response spit back - just like the original drive but without doing the actual challenge. Since it is a pressed disc, every response would be identical and therefore the response could be calculated with an original disc and could be shared. easy.
Then came AP2.5. This gives MS a lot more flexibility. It works differently. Slim was also designed AROUND the AP2.5 design and the known problem of drive flashing.
MS can essentially 'roll' keys now, and overwrite firmwares. So they do a DIFFERENT challenge (updated firmware) on the same old disc, with a different response. now you need a patch.
Every time they 'roll' a key - you may need a new firmware, AP2.5 patch, or both.
The DVD firmware can hold 50 potential/unknown AP2.5 keys, per game...
MS taking baby steps right now. C4E can barely keep up. still 0272 issues.. nevermind the untouched drives. MS throws AP2.5 curveball at him. 1/6 games going a week later. Still no public AP2.5 ripping firmware, MS can change AP2.5 on the fly so its pointless. really playing on borrowed time. If MS ever does start strides - its game overThis post has been edited by ruciz: Jul 26 2011, 06:20 AM