There are a number of ways to protect your CDs and DVDS from being copied. Most of them depend on breaking conformity with the CD and DVD standards. In this article we will discuss the use of dummy files and illegal sectors, although there are other methods of protecting CDs.
Dummy files on CDS
For the most part CD-ROMs use an ISO9660-filesystem to arrange the existing space into files and folders. The majority of times it is used underneath a further sophisticated file system like Joliet to get round a few limitations. The most basic approach is to fake a little information inside the file system. Early production of software copied every file one at a time from the original medium and re-created a new file system on the target medium, losing the faked information, hence making a copy disk un-useable.
Illegal sectors on CDS
The top-level data structure of a CD-Rom is called a sector and it is the only one that is available to software (counting the OS). Every sector contains 2048 byte of user-data and 304 bytes of structural details (for a MODE1 CD-ROM), the sector number, signifying the sector’s absolute and relative logical...
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