Media authentication using altered sector sizes

Details Media authentication using altered sector sizes Media authentication using altered sector sizes

2006-09-05

2006-09-05

Young, Wayne (Department: 2627)

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

C369S059250, C369S059260, C369S275300, C711S163000, C711S164000

Reexamination Certificate

active

07102973

ABSTRACT:
Method and apparatus for authenticating a data storage medium (such as an optical disc including a compact disc, CD or a digital versatile disc, DVD) in which data are nominally stored in a plurality of sectors have a defined sector size containing a first total number of bits. A number of altered sectors are formed on the medium each having a second total number of bits different from the first total number of bits. The altered sectors will provide readback data at a different rate than a nominal rate determined by the defined sector size. The altered sectors are used to verify the medium as being an authorized copy and prevent unauthorized copying efforts.

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