Apparatus and methods for securing information in storage media

Details Apparatus and methods for securing information in storage media Apparatus and methods for securing information in storage media

2007-08-28

2007-08-28

Neyzari, Ali (Department: 2627)

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

C369S047280, C369S059240, C280S277000

Reexamination Certificate

active

10909274

ABSTRACT:
The methods described herein are directed at securing information in storage media such as optical discs, magnetic disks or a combination thereof. In particular the methods describe embedding a first stream of data in a second stream of data by modulating the location of transition edges in the second stream of data. A method for writing data to a storage medium includes the steps of representing the raw (first) data to be written to the storage medium as a sequence of bits in a format appropriate for writing to a storage medium; representing second data (supplemental data) as a second sequence of bits and writing the first sequence of bits to the storage medium as a corresponding sequence of pits along a track, wherein the location of the pits along the track represents the stored first data, and while writing the first sequence of pits, modulating the locations at which transition edges of the sequence of pits are written to embed the second data in the sequence of pits.

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patent: WO 02/35529 (2002-05-01), None

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