Okay, I don't know where I should this quesiton. I hope it will be correct in this thread.
Searching around for information on RPC2, I gathered that it's a v2 protection set by the film industry and the peripheral manufacturers for DVD movies.
The protection is that the DVD drive checks the region code on the DVD to see if it matches the one actually set (lets assume it's permanent) in the DVD drive. This is said to be done in hardware, i.e. by the DVD drive itself.
This would normally mean that only a modified firmware will disable this protection.
Now, my question is... if it is done in hardware, then how it is possible that programs such as 'AnyDVD' or 'DVD-region-free' can bypass the protection without modifying the DVD firmware.
I thought that the whole purpose of RPC2 was that the protection barrier is the hardware, but it is possible to bypass by just the software alone!!
I don't know much about the protection, but here's my guess. The RPC2 protection is where the DVD drive still involves passing the keys required to/from the software on the PC. And maybe because the protection is flawed in someway (I'm not sure), you can still pass the correct key for what ever region to the DVD drive and the DVD drive will accept and use it.
Does anyone knows... or any suggestions... this is puzzling me.