EP0565281A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Information handling system incorporated with an information security measure
Assignee: NHK Spring Co Ltd
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Filing: 1993-03-25
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Granted: —
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Expires: 2013-03-25
Abstract
Abstract In an information handling system such as an information recording system and an information communicating system, illicit use of the information, which is normally recorded in a medium or is being communicated, is effectively prevented by requiring decoding information for the use of the information. The medium for carrying the decoding information is provided separate from medium used for the information to the handled. Alternatively, the decoding information may be recording in a medium provided in a key which allows operation of a part of the system. Preferably, the decoding information is recorded in regions of hologram, diffraction grating or light polarizing material.
Inventors
- 👤 Tsugutaka Sugahara
- 👤 Hidekazu Hoshino
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 13:14
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/28; G06; G06F; G06F21/00; G06F21/70; G06F21/78; G06F21/79; G06F21/80; G06K; G06K19/00; G06K19/06; G06K19/08; G06K19/10; G06K19/14; G06K19/16; G11B19/00; G11B19/02; G11B20/00; G11B20/00086; G11B20/00094; G11B20/0021; G11B20/00217; G11B20/00231; G11B20/00876; G06F2211/00; G06F2211/007
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
157 words
An information handling system incorporated with an information security measure, comprising: first information handling means; encoding means provided in association with said first information handling means for encoding information handled by said first information handling means; decoding information carrying means for carrying decoding information which is needed for decoding said information encoded by said encoding means; second information handling means adapted to handle said information which has been handled by said first information handling means; decoding information reading means provided in association with said second information handling means for reading decoding information from said decoding information carrying means; and decoding means provided in association with said second information handling means for decoding said information which was encoded by said encoding means according to said decoding information carried by said decoding information carrying means; said decoding information carrying means being provided separately from a medium used by said first and second information handling means for handling said information.
Claim 2
Dependent Claim
157 words
An information handling system incorporated with an information security measure, comprising: first information handling means; encoding means provided in association with said first information handling means for encoding information handled by said first information handling means; decoding information carrying means for carrying decoding information which is needed for decoding said information encoded by said encoding means; second information handling means adapted to handle said information which has been handled by said first information handling means; decoding information reading means provided in association with said second information handling means for reading decoding information from said decoding information carrying means; and decoding means provided in association with said second information handling means for decoding said information which was encoded by said encoding means according to said decoding information carried by said decoding information carrying means; said decoding information carrying means being provided separately from a medium used by said first and second information handling means for handling said information.
Claim 3
Dependent Claim
86 words
An information handling system according to claim 1, wherein said first information handling means consists of a writer for writing said information as coded by said coding means into a first storage medium, and said second information handling means consists of a reader for reading said coded information from said first storage medium, said decoding information carrying means consisting of a second storage medium which is attached to said first storage medium, and cannot be read by said reader but by said decoding information reading means.
Claim 4
Dependent Claim
19 words
An information handling system according to claim 2, wherein said first storage medium consists of a magnetic recording medium.
Claim 5
Dependent Claim
19 words
An information handling system according to claim 2, wherein said second storage medium consists of an optical recording medium.
Claim 6
Dependent Claim
32 words
An information handling system according to claim 4, wherein said optical recording medium consists of at least one region defined in association with said first storage medium and having a selective reflectivity.
Claim 7
Dependent Claim
35 words
An information handling system according to claim 4, wherein said first storage medium consists of a flexible disk, and said region for said second storage medium is defined on a casing of said flexible disk.
Claim 8
Dependent Claim
46 words
An information handling system according to claim 1, wherein first information handling means consists of a signal transmitter while said second information handling means consists of a receiver, and said decoding information carrying means is incorporated in key means which allows the use of said receiver.
Claim 9
Dependent Claim
34 words
An information handling system according to claim 7, wherein said key means consists of an ID card, and said decoding information carrying means consists of decoding information recording means provided in said ID card.
Claim 10
Dependent Claim
34 words
An information handling system according to claim 7, wherein said key means consists of a mechanical key, and said decoding information carrying means consists of decoding information recording means provided in said ID card.
Claim 11
Dependent Claim
148 words
An information recording system for writing information into a recording medium with a writer and reading the thus recorded information with a reader, wherein: said information recording medium comprises first information recording means for recording coded information, and second information recording means, different from said first recording means, for recording decoding information needed for decoding said coded information; said writer comprises means for encoding information that is to be recorded in said first recording means; and said reader comprises means for optically accessing said second information recording means and reading said decoding information, and means for decoding said encoded information according to said decoding information read by said reader; said information encoded by said writer being recording in said first recording means, and said reader decoding and producing the information recorded in said first information recording means according to said decoding information recorded in said second recording means.
Claim 12
Dependent Claim
148 words
An information recording system for writing information into a recording medium with a writer and reading the thus recorded information with a reader, wherein: said information recording medium comprises first information recording means for recording coded information, and second information recording means, different from said first recording means, for recording decoding information needed for decoding said coded information; said writer comprises means for encoding information that is to be recorded in said first recording means; and said reader comprises means for optically accessing said second information recording means and reading said decoding information, and means for decoding said encoded information according to said decoding information read by said reader; said information encoded by said writer being recording in said first recording means, and said reader decoding and producing the information recorded in said first information recording means according to said decoding information recorded in said second recording means.
Claim 13
Dependent Claim
35 words
An information recording system according to claim 10, wherein said second information recording means comprises a plurality of regions each of which represents information by diffracting, reflecting or polarizing incident light into a specific direction.
Claim 14
Dependent Claim
134 words
An information communicating system for communicating information from transmitting means to receiving means, and producing said transmitted information, comprising: encoding means provided in said transmitting means for encoding information to be communicated; key means provided with optically accessible decoding information recording means for recording decoding information for decoding said coded information; reading means provided in said receiving means for reading said decoding information by optically accessing said decoding information recording means; and decoding means provided in said receiving means for decoding said encoded information according to said decoding information that has been read from said decoding information recording means; said information encoded and transmitted by said transmitting means being received by said receiving means, and decoded and produced by said decoding means according to said decoding information recorded in said decoding information recording means.
Claim 15
Dependent Claim
134 words
An information communicating system for communicating information from transmitting means to receiving means, and producing said transmitted information, comprising: encoding means provided in said transmitting means for encoding information to be communicated; key means provided with optically accessible decoding information recording means for recording decoding information for decoding said coded information; reading means provided in said receiving means for reading said decoding information by optically accessing said decoding information recording means; and decoding means provided in said receiving means for decoding said encoded information according to said decoding information that has been read from said decoding information recording means; said information encoded and transmitted by said transmitting means being received by said receiving means, and decoded and produced by said decoding means according to said decoding information recorded in said decoding information recording means.
References Cited (Backward Citations)
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