Method and apparatus for controlling access to storage media

Details Method and apparatus for controlling access to storage media Method and apparatus for controlling access to storage media

G - Physics

11

B

G11B 7/24 (2006.01) G11B 7/007 (2006.01) G11B 7/243 (2006.01) G11B 7/247 (2006.01) G11B 7/26 (2006.01) G11B 19/04 (2006.01) G11B 19/12 (2006.01) G11B 20/00 (2006.01) G11B 23/28 (2006.01)

Patent

CA 2415047

A method and apparatus for preventing copying of data from optical storage media. A locus (410) on optical storage medium is initially read to produce a signal and is then re-read by a reader to produce a second signal. The signal detected upon re-reading is different from the signal that is detected upon initial sampling. A method and apparatus for controlling access to a storage medium, such as an optically readable medium. Light sensitive or other materials (400) that are adapted to change state and affect reading of a storage medium are used to control access to data that may be stored on optical medium and/or to control use of the medium.

L'invention concerne un procédé et un appareil destinés à prévenir la copie de données stockées dans un support de stockage optique. Tout d'abord, un locus du support de stockage optique est lu en vue de produire un signal, puis il est relu par un lecteur en vue de produire un second signal. Le signal détecté lors de la relecture est différent du signal détecté lors de l'échantillonnage initial. L'invention concerne également un procédé et un appareil destinés à contrôler l'accès à un support de stockage, tel qu'un support lisible optiquement. Des matériaux sensibles à la lumière ou autres conçus de manière à modifier l'état et la lecture du support de stockage sont utilisés en vue de contrôler l'accès aux données stockées sur un support optique et/ou de contrôler l'utilisation dudit support.

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