IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0631585
(2000-08-03)
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등록번호 |
US-7486790
(2009-02-03)
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발명자
/ 주소 |
- Selinfreund,Richard H.
- Goyette,Donald Roland
- Drew,Jeffrey M.
- Vig,Rakesh
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출원인 / 주소 |
- Verification Technologies, Inc.
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
8 인용 특허 :
292 |
초록
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A method and apparatus for controlling access to a storage medium, such as an optically readable medium. Light sensitive or other materials 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 contro
A method and apparatus for controlling access to a storage medium, such as an optically readable medium. Light sensitive or other materials 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.
대표청구항
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What is claimed is: 1. A data storage medium comprising: a structure adapted to support data which is optically-readable by an optical reader; a material associated with said structure adapted to support data, said material characterized by displaying at least two different optical states to an opt
What is claimed is: 1. A data storage medium comprising: a structure adapted to support data which is optically-readable by an optical reader; a material associated with said structure adapted to support data, said material characterized by displaying at least two different optical states to an optical reader, a first of said optical states occurring prior to exposure to an activating radiation and a second optical state after exposure to said activating radiation; a software instruction set comprising code preventing read of one or more portions of said structure of data unless an optical change of said material from said first optical state to said second optical state occurs on said data storage medium. 2. The data storage medium of claim 1, wherein said material is a light sensitive material. 3. The data storage medium of claim 1, wherein said second optical state is a state in which reading of the data encoded in the data structure associated with the material is affected as compared to reading of such data when the material is in its first optical state. 4. The data storage medium of claim 1, wherein said activating radiation is electromagnetic radiation. 5. The data storage medium of claim 1, wherein the data storage medium is an optical disc. 6. The data storage medium of claim 1, wherein said material is a cyanine dye. 7. The data storage medium of claim 1, wherein the material has a delay time in conversion of said first optical state to said second optical state after absorption of said activating radiation that, is greater than about 1 millisecond. 8. The storage medium of claim 7, wherein said delay time is less than a time required to read data supported by the data structure of data by an optical reader using oversampling. 9. The storage medium of claim 7, wherein said delay time is greater than a time required to read data supported by the structure of data by an optical reader using oversampling. 10. The storage medium of claim 1, wherein said material transiently changes from said first optical state to said second optical state upon exposure to said activating radiation with a persistence of greater than one nanosecond during which said material remains in said second state before changing back to said first optical state. 11. The storage medium of claim 1, wherein said material is positioned in or on one or more discrete area(s) of said structure of data. 12. The storage medium of claim 11 wherein when said structure of data comprises a plurality of pits and lands, said discrete area(s) comprise less than each pit and/or each land of said structure of data. 13. The storage medium of claim 11, wherein at least one of said discrete areas comprises material having a delay time and a persistence such that the discrete area presents two different data reads of said structure of data at said discrete area to said optical reader depending on whether said material is in said first optical state or in said second optical state. 14. The storage medium of claim 13, wherein said two different data reads, and/or transition between the same, may be used to at least one of: authenticate said structure of data, decrypt data supported by said structure of data, correct data read from said structure of data, and provide a watermark in data copied from said structure of data. 15. The storage medium of claim 1, wherein said material is temporary such that said material is not detectable in one of said first and second optical state after a certain amount of time or number of times that the material is exposed to said activating radiation. 16. The storage medium of claim 1, wherein at least some of said material is disposed at different depths at different locations in the data storage medium. 17. The storage medium of claim 1, wherein said software instruction set uses the detection of said material to prevent unauthorized access to data supported by said structure. 18. The storage medium of claim 17, wherein said optical data both supports data that is freely accessible, and supports data that may be accessed only if said material is detected. 19. An optical recording medium comprising: a recording medium; a plurality of areas in or on said recording medium providing for distinctly different optical characteristics readable by an optical reader, said plurality of areas encoding data which is convertible by a processor coupled to said optical reader into data; and a material capable of existing in a first optical state and a second optical state disposed on at least a portion of said recording medium wherein said material is of a character, and is positioned with respect to said plurality of areas in a manner, such that said material provides different reads of said data encoded by said plurality of areas when said material is in its first optical state versus when it is in its second optical state, a first of said optical states occurring prior to an activating radiation and a second optical state after exposure to said activating radiation; an instruction set incorporated onto said recording medium, said instruction set limiting decoding of at least a portion of said data encoded by said plurality of areas when said material is in its first optical state. 20. The optical recording medium of claim 19, wherein the material is decomposable. 21. The optical recording medium of claim 20, wherein the material is decomposable by exposure to a light source. 22. The optical recording medium of claim 20, wherein the material is decomposed to such an extent that at least a portion of said data recording layer is inaccessible to said optical reader. 23. A method of verifying the authenticity of an optical storage medium having optically-stored data embodied therein and comprising a material capable of a change from a first optical state to a transient second optical state, said method comprising the steps of: reading optically-stored data with said optical reader at least one locus on the optical medium comprising said material positioned with respect to said optically-stored data to cause different data reads when said material is its first optical state and its second optical state; and determining that the optical medium is authentic if the read of said optically-stored data at such locus is different upon one optical read than a subsequent optical read wherein said transient second optical state eventuates upon interaction of the material with one or more electromagnetic radiation sources, and said second optical state spontaneously converting to said first optical state, said optically-stored data being readable by an optical reader, and change from said first optical state to said second optical state being effectuated by said optical reader. 24. The method of claim 23, further comprising the step of: inputting an identification string that is used to determine the at least one locus. 25. The method of claim 23, wherein the persistence time of said material in its second optical state is less than 99 ms. 26. The method of claim 23, wherein the step of reading at least one locus comprises: reading a plurality of loci on the medium in a specified order. 27. A data storage medium comprising: a structure adapted to support data so that the data may be optically read; and a material disposed in or on the structure, wherein said material is adapted to be altered between at least two states, and wherein it is positioned with respect to said structure to affect a read of at least some of said data by an optical reader in a manner that when it is in a first state it inhibits read of said data, but when it is in a second state it allows read of said data, said material requiring an input signal to change from its first state to its second state wherein said input signal is electromagnetic radiation. 28. The storage medium of claim 27, wherein, when said material is a transient state material which does not require an input signal to change from said second state to said first state. 29. The storage medium of claim 28, wherein said material is temporary such that, after a certain amount of time or reads by said optical reader, no data with respect to the at least some of said data is readable by said optical reader. 30. The storage medium of claim 27, wherein said material is a light sensitive material. 31. The storage medium of claim 27 wherein the storage medium is an optical disc. 32. The storage medium of claim 27, wherein said material is a cyanine dye. 33. The storage medium of claim 27, wherein the material has a delay time after which the material changes from the first state to the second state after receiving the input signal. 34. The storage medium of claim 33, wherein said delay time is less than an a time required to read said data supported by said structure using oversampling. 35. The storage medium of claim 27, wherein said material has a persistence during which the material remains in said second state. 36. The storage medium of claim 27, wherein the storage medium includes code that requires detection of said material to at least one of: authenticate the structure, decrypt data supported by the structure, correct data read from the structure, and provide a watermark in data copied from the structure. 37. The storage medium of claim 27, wherein the material is positioned in a plurality of unique discrete areas compared to other storage media in a group. 38. The storage medium of claim 27, wherein the material is disposed at different depths at different locations in the structure. 39. The storage medium of claim 33, wherein said delay time is greater than a time required to read said data supported by said structure using oversampling.
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