Patent ID: 7076660

Claim:
A method comprising the steps of: creating an image file including main information; generating access control information for controlling the access to the main information; producing a record carrier depending on the main information and the access control information, the record carrier having information stored thereon according to predefined formatting and error correcting rules, the record carrier being subdivided into addressable sectors, the record carrier including a padding area which includes correction error sectors and correction non-error sectors, the correction error sectors containing correction errors which cannot be corrected using the error correction rules, the correction non-error sectors containing no errors that cannot be corrected using the error correction rule, producing the record carrier including the steps of: creating a correctable bit sequence by applying the predefined formatting and error correcting rules to the image file; modifying the correctable bit sequence according to the access control information with sufficient intentional bit errors to provide correction errors which cannot be corrected by the error correcting rules and which constitute a predefined correction error pattern; and translating the modified bit sequence into a physical pattern of marks on the record carrier, where the correction errors are stored in the padding area.