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Method and apparatus for controling access to storage media

a technology for controlling access and storage media, applied in the direction of digital signal error detection/correction, instruments, recording signal processing, etc., can solve the problem of material providing a delayed, persistent respons

Inactive Publication Date: 2006-02-02
VERIFICATION TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The invention relates to a method for controlling access to storage media, such as optical disks, by using a material that can be altered between different states. The material can be used to represent information about the media, and can be used to control access to the media. The material can be permanent or temporary, and can be used to provide dynamic watermarking of data or prevent unauthorized installation of software. The invention also includes the use of light sensitive material to provide access to data on optical media, and to prevent unauthorized installation of software. Overall, the invention provides a way to securely control access to storage media and prevent unauthorized use of software."

Problems solved by technology

However, the material may provide a delayed, persistent response that can be detected upon a later reading.

Method used

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  • Method and apparatus for controling access to storage media
  • Method and apparatus for controling access to storage media
  • Method and apparatus for controling access to storage media

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0057] In one illustrative embodiment, the presence of light sensitive materials 21 on a medium 20 is used to determine that the medium 20 is an authorized medium 20 and / or contains data authorized for a particular use. In this embodiment, the light sensitive material 21 on the medium 20 is used by an installation program to prevent unauthorized installation of software recorded on the medium 20 on a computer, but the same or similar technique may be used to prevent unauthorized use of the medium 20, unauthorized use, such as reading or writing, of data on the medium 20, and so on. In this example, the installation program along with data representing the software code are recorded on the medium 20, but the installation program may be provided in other ways, such as stored in a memory of a media reader 2, on another medium 20, etc.

[0058] When an attempt is made to install the software on the medium 20 shown in FIG. 2, the installation program is read from the medium 20, e.g., by th...

example 2

[0063] Those of skill in the art will appreciate that Example 1 described above may be altered in many ways to provide different and / or varying levels of protection. As a second example, authentic media 20 may be provided with-an alphanumeric security code that is unique to each disk and is printed on a card accompanying the media 20. At the time of installation, the installation program may request the user to enter the security code. The installation program may then use the code to verify the authenticity of the medium 20 having the software to be installed. For example, the installation program may use the security code to determine a sector 20a-20f read sequence and / or timing, as an encryption key or password, to determine where on the medium 20 light sensitive material 21 is positioned, to determine an expected output from the media reader 2 when using a predefined sector read sequence, and so on. Based on this information, the medium 20 may be read, and the output from the re...

example 3

[0065] In the examples described above, no distinction was made regarding reading specific portions of a medium 20 that is associated with a single spot of light sensitive material 21. In this illustrative embodiment of the invention, different portions of a medium 20 that are associated with a single spot of light sensitive material 21 are read. FIG. 3 shows a portion of the medium 20 and a spot or area of light sensitive material 21. Although the medium 20 may have a plurality of regions each associated with a corresponding spot of light sensitive material 21, only the reading of a single portion of the medium 20 is discussed below for simplicity. In light source, the light sensitive material 21 may be caused to alter state. That is, illumination of any of the tracks a-d for reading may illuminate the light sensitive material 21 and cause it to change from one state to another. For example, if the reader 2 is directed to sample a section of track a, and light sensitive material 21...

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Abstract

A method and apparatus for preventing copying of data from optical disks. A locus on optical disk 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 an optical disk, such as an optically readable disk. Light sensitive or other materials that are adapted to change state and affect reading of an optical disk are used to control access to data that may be stored on optical disk and / or to control use of the optical disk.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This is a continuation application of U.S. patent application Ser. No. 11 / 005,257, filed Dec. 6, 2004, which is a continuation-in-part of U.S. patent application Ser. No. 10 / 645,078, filed Aug. 21, 2003, which is a continuation of U.S. patent application Ser. No. 09 / 631,585, filed Aug. 3, 2000, the contents of which are incorporated herein by reference in their entirety.FIELD OF THE INVENTION [0002] The present invention relates to controlling access to storage media, such as data recorded on optical media. BACKGROUND OF THE INVENTION [0003] Optically readable storage media, such as music and software CD's and video DVD's, provide inexpensive ways to share and disseminate digital information, making such media the media of choice among both producers and consumers. This is clearly evident as CDs have nearly replaced cassette tapes and floppy disks in the music and software industries and DVDs have made significant inroads in replacing v...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G11B19/04G11B5/09G11B7/246G11B19/12G11B20/00
CPCG11B7/246G11B7/2472G11B7/252G11B7/2534G11B19/12G11B19/122G11B2007/24612G11B20/00123G11B20/00586G11B20/00608G11B20/00768G11B20/00876G11B20/00927G11B20/00086
Inventor SELINFREUND, RICHARD H.GOYETTE, DONALD ROLANDDREW, JEFFREY M.VIG, RAKESH
Owner VERIFICATION TECH INC
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