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AssigneeDoug Carson & Associates, Inc.
InventorDouglas M. Carson
Estimating the term…
A data storage medium (230, 400) and associated method (500, 520), apparatus (250, 430) and application routine (110, 524) for authenticating the medium as an authentic copy. The medium (such as a prerecorded or recordable optical disc) is formatted so that a predefined relationship is established (502) between physical locations of at least first and second addressable data sectors (220) prior to recording of data to the sectors (506). The predetermined relationship will be present in an authorized copy of the medium (330) but not in an unauthorized duplicate (332), allowing an application routine to grant or deny access (532, 534) to remaining portions of the medium based on the presence or absence of the detected relationship. The predetermined relationship is further used to embed a forensic data payload to serve as a digital fingerprint on the medium.
A method comprising a step of formatting a data storage medium of the type in which data are stored in addressable sectors on a plurality of tracks so as to affirmatively establish a predefined relationship between physical locations of at least a first sector and a second sector prior to recording of data to said at least first and second sectors, the presence of said predefined relationship between the resulting physical locations of the at least first and second sectors serving to identify the medium as an authorized copy.
A method comprising steps of:
A system for formatting a data storage medium, comprising:
A data storage medium comprising a plurality of addressable data sectors formed on a plurality of tracks, the sectors located in preselected physical locations in accordance with a profile generated prior to recording of the sectors, the profile establishing a predetermined relationship between the physical locations of at least selected sectors to identify the data storage medium as an authorized copy.
An application routine executed in a processor environment to read data from a data storage medium, the medium formatted by predetermining desired physical locations of a plurality of sectors the medium to establish a predetermined relationship between at least a first selected sector and a second selected sector prior to recording of data to the medium to locate said sectors, and by subsequently modulating a writing signal to locate said sectors on the data storage medium in the predetermined desired physical locations, wherein the application routine is configured to measure an access parameter relating to a sequential access of the at least first and second sectors, grant access to remaining sectors on the medium when the measured access parameter indicates the predetermined relationship is present on the medium, the presence of the predetermined relationship indicating that the medium is an authorized copy, and to deny access to remaining sectors on the medium when the measured access parameter indicates the predetermined relationship is not present on the medium, the absence of the predetermined relationship indicating that the medium is an unauthorized duplicate.
Dependencies are inferred from the claim text.