Medium, apparatus, and method related to encryption resultant information

• US 6,243,330 B1
• Filed: 05/05/1999
• Issued: 06/05/2001
• Est. Priority Date: 01/29/1992
• Status: Expired due to Term

• Current Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Oshima, Mitsuaki
• Primary Examiner(s): Neyzari, Ali
• Application Number:
  US09/305,318
• Time in Patent Office: 762 Days
• Field of Search: 369/13, 369/32, 369/14, 369/33, 369/116, 369/47, 369/48, 369/44.29, 369/44.28, 369/275.2, 369/275.3, 369/275.4, 360/59, 360/114
• US Class Current: 380/228
• CPC Class Codes: G06F 2003/0697 device management, e.g. handlers, drivers, I/O schedulers
• CPC Class Codes: G06F 21/00 Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
• CPC Class Codes: G06F 21/80 in storage media based on magnetic or optical technology, e.g. disks with sectors preventing unauthorised reproduction or copying of disc-type recordable media G11B20/00
• CPC Class Codes: G06F 3/0601 Interfaces specially adapted for storage systems
• CPC Class Codes: G06F 3/061 Improving I/O performance
• CPC Class Codes: G06F 3/0632 by initialisation or re-initialisation of storage systems
• CPC Class Codes: G06F 3/0634 by changing the state or mode of one or more devices
• CPC Class Codes: G06F 3/0653 Monitoring storage devices or systems
• CPC Class Codes: G06F 3/0674 Disk device
• CPC Class Codes: G06F 3/0677 Optical disk device, e.g. CD-ROM, DVD
• CPC Class Codes: G11B 11/10502 characterised by the transducing operation to be executed
• CPC Class Codes: G11B 11/10532 Heads
• CPC Class Codes: G11B 11/10556 with provision for moving or switching or masking the transducers in or out of their operative position
• CPC Class Codes: G11B 11/10558 in view of the loading or unloading of the carrier
• CPC Class Codes: G11B 11/10595 Control of operating function
• CPC Class Codes: G11B 13/00 Recording simultaneously or selectively by methods covered by different main groups among G11B3/00, G11B5/00, G11B7/00 and G11B9/00; Record carriers therefor not otherwise provided for; Reproducing therefrom not otherwise provided for G11B9/14, G11B11/002 take precedence; driving or moving of heads G11B3/02, G11B5/48, G11B7/08, G11B21/02
• CPC Class Codes: G11B 13/04 magnetically or by magnetisation and optically or by radiation, for changing or sensing optical properties
• CPC Class Codes: G11B 13/045 combined recording by magnetic and optic means
• CPC Class Codes: G11B 17/04 Feeding or guiding single record carrier to or from transducer unit guiding during transducing operation G11B17/34
• CPC Class Codes: G11B 17/041 specially adapted for discs contained within cartridges
• CPC Class Codes: G11B 17/043 : Direct insertion, i.e. without external loading means
• CPC Class Codes: G11B 17/056 : with sliding loading means
• CPC Class Codes: G11B 19/02 : Control of operating function, e.g. switching from recording to reproducing
• CPC Class Codes: G11B 19/04 : Arrangements for preventing, inhibiting, or warning against double recording on the same blank or against other recording or reproducing malfunctions
• CPC Class Codes: G11B 19/10 : by sensing presence or absence of record in accessible stored position or on turntable
• CPC Class Codes: G11B 19/12 : by sensing distinguishing features of or on records, e.g. diameter end mark
• CPC Class Codes: G11B 19/122 : involving the detection of an identification or authentication mark record carriers indicating unauthorised or prior use G11B23/28
• CPC Class Codes: G11B 19/24 : Arrangements for providing constant relative speed between record carrier and head
• CPC Class Codes: G11B 19/247 : using electrical means
• CPC Class Codes: G11B 20/00007 : Time or data compression or expansion audio compression based on psychoacoustics G10L19/00; data processing for reproducing audio data at different playback speeds G10L21/04; video compression H04N19/00; data compression per se H03M7/30
• CPC Class Codes: G11B 20/00086 : Circuits for prevention of unauthorised reproduction or copying, e.g. piracy indicating unauthorised use of record carriers in general G11B23/28; scrambling for television signal recording H04N5/913; network architectures or network protocols for network security H04L63/00; cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
• CPC Class Codes: G11B 20/00094 : involving measures which result in a restriction to authorised record carriers
• CPC Class Codes: G11B 20/00166 : involving measures which result in a restriction to authorised contents recorded on or reproduced from a record carrier, e.g. music or software
• CPC Class Codes: G11B 20/00188 : involving measures which result in a restriction to authorised devices recording or reproducing contents to/from a record carrier
• CPC Class Codes: G11B 20/00224 : wherein the key is obtained from a remote server
• CPC Class Codes: G11B 20/00253 : wherein the key is stored on the record carrier
• CPC Class Codes: G11B 20/00268 : said barcode being recorded in a burst cutting area [BCA]
• CPC Class Codes: G11B 20/00318 : the key being stored in the TOC
• CPC Class Codes: G11B 20/00347 : wherein the medium identifier is used as a key
• CPC Class Codes: G11B 20/00557 : wherein further management data is encrypted, e.g. sector headers, TOC or the lead-in or lead-out areas
• CPC Class Codes: G11B 20/00586 : said format change concerning the physical format of the recording medium
• CPC Class Codes: G11B 20/00594 : wherein the shape of recording marks is altered, e.g. the depth, width, or length of pits
• CPC Class Codes: G11B 20/00601 : wherein properties of tracks are altered, e.g., by changing the wobble pattern or the track pitch, or by adding interruptions or eccentricity
• CPC Class Codes: G11B 20/0071 : involving a purchase action
• CPC Class Codes: G11B 20/00876 : wherein physical copy protection means are attached to the medium, e.g. holograms, sensors, or additional semiconductor circuitry
• CPC Class Codes: G11B 20/1217 : on discs
• CPC Class Codes: G11B 20/1833 : by adding special lists or symbols to the coded information G11B20/1806, G11B20/1866 take precedence
• CPC Class Codes: G11B 20/1866 : by interleaving G11B20/1809 takes precedence
• CPC Class Codes: G11B 20/24 : for reducing noise control of amplification in general, e.g. dependent upon noise level H03G
• CPC Class Codes: G11B 2007/0013 : for carriers having multiple discrete layers
• CPC Class Codes: G11B 2020/1259 : with ROM/RAM areas
• CPC Class Codes: G11B 2220/20 : Disc-shaped record carriers
• CPC Class Codes: G11B 2220/211 : Discs having both read-only and rewritable or recordable areas containing application data; Partial ROM media
• CPC Class Codes: G11B 2220/213 : Read-only discs
• CPC Class Codes: G11B 2220/237 : having exactly two recording layers
• CPC Class Codes: G11B 2220/2525 : Magneto-optical [MO] discs
• CPC Class Codes: G11B 2220/2529 : Mini-discs
• CPC Class Codes: G11B 2220/2545 : CDs
• CPC Class Codes: G11B 2220/2587 : Laser Discs; Optical disc using analog recording
• CPC Class Codes: G11B 2220/65 : wherein solid state memory is used for storing indexing information or metadata
• CPC Class Codes: G11B 2220/655 : Memory in cassette [MIC]
• CPC Class Codes: G11B 2220/90 : Tape-like record carriers
• CPC Class Codes: G11B 23/0302 : Auxiliary features
• CPC Class Codes: G11B 23/0306 : Means for locking the record carriers
• CPC Class Codes: G11B 23/0308 : Shutters G11B23/0317 takes precedence
• CPC Class Codes: G11B 23/28 : Indicating or preventing prior or unauthorised use, e.g. cassettes with sealing or locking means, write-protect devices for discs write-protect devices for tapes G11B23/042, G11B23/08714; dummy cassettes for locking in the drive G11B33/005
• CPC Class Codes: G11B 23/281 : by changing the physical properties of the record carrier
• CPC Class Codes: G11B 23/284 : on the record carrier
• CPC Class Codes: G11B 23/40 : Identifying or analogous means applied to or incorporated in the record carrier and not intended for visual display simultaneously with the playing-back of the record carrier, e.g. label, leader, photograph
• CPC Class Codes: G11B 23/44 : Information for display simultaneously with playback of the record, e.g. photographic matter associated working of cameras or projectors with sound recording or reproducing means G03B31/00
• CPC Class Codes: G11B 25/04 : using flat record carriers, e.g. disc, card
• CPC Class Codes: G11B 27/034 : on discs G11B27/036, G11B27/038 take precedence
• CPC Class Codes: G11B 27/105 : of operating discs
• CPC Class Codes: G11B 27/107 : of operating tapes
• CPC Class Codes: G11B 27/11 : by using information not detectable on the record carrier
• CPC Class Codes: G11B 27/24 : by sensing features on the record carrier other than the transducing track ; sensing signals or marks recorded by another method than the main recording
• CPC Class Codes: G11B 27/3027 : used signal is digitally coded
• CPC Class Codes: G11B 27/3063 : Subcodes
• CPC Class Codes: G11B 27/329 : on a disc [VTOC]
• CPC Class Codes: G11B 27/34 : Indicating arrangements indicating means incorporated in magazine or cassette G11B23/046 and G11B23/0875; indicating measured values in general G01D
• CPC Class Codes: G11B 27/36 : Monitoring, i.e. supervising the progress of recording or reproducing for digital recording G11B20/00 and s.gr.; for monitoring, testing or measuring of TV recorders of the type covered by H04N5/76 and subgroups, see H04N17/06
• CPC Class Codes: G11B 31/00 : Arrangements for the associated working of recording or reproducing apparatus with related apparatus with cameras or projectors G03B31/00 ; recording/reproducing of music for electrophonic musical instruments G10H1/0033; automatic arrangements for answering calls or for recording messages for absent subscribers H04M1/64; telephonic communication systems adapted for combination with dictation recording and playback systems H04M11/10; connection of TV recorder with other related apparatus, e.g. TV camera or receiver, in which the TV signal is significantly involved H04N, e.g. H04N23/00, H04N5/765; combination of radio or TV with other apparatus, e.g. with vehicles H05K11/00
• CPC Class Codes: G11B 5/00 : Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor G11B11/00 and G11B13/00 take precedence
• CPC Class Codes: G11B 5/012 : Recording on, or reproducing or erasing from, magnetic disks G11B17/00, G11B19/00 take precedence
• CPC Class Codes: G11B 5/1278 : specially adapted for magnetisations perpendicular to the surface of the record carrier
• CPC Class Codes: G11B 5/17 : Construction or disposition of windings
• CPC Class Codes: G11B 5/2654 : for recording or erasing
• CPC Class Codes: G11B 5/5526 : Control therefor; circuits, track configurations or relative disposition of servo-information transducers and servo-information tracks for control thereof G11B5/556 takes precedence
• CPC Class Codes: G11B 5/5543 : servo-format therefor
• CPC Class Codes: G11B 5/59677 : with optical servo tracking
• CPC Class Codes: G11B 7/0037 : with discs
• CPC Class Codes: G11B 7/005 : Reproducing G11B7/0065 takes precedence
• CPC Class Codes: G11B 7/007 : Arrangement of the information on the record carrier, e.g. form of tracks , actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track
• CPC Class Codes: G11B 7/00736 : Auxiliary data, e.g. lead-in, lead-out, Power Calibration Area [PCA], Burst Cutting Area [BCA], control information sector headers or adresses in prepits G11B7/00745; address data in track wobble G11B7/24082
• CPC Class Codes: G11B 7/00745 : Sectoring or header formats within a track formats in general G11B20/12
• CPC Class Codes: G11B 7/013 : for discrete information, i.e. where each information unit is stored in a distinct discrete location , e.g. digital information formats within a data block or sector
• CPC Class Codes: G11B 7/24 : Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the arrangement of information on the carrier G11B7/007
• CPC Class Codes: G11B 7/26 : Apparatus or processes specially adapted for the manufacture of record carriers
• CPC Class Codes: G11B 7/28 : Re-recording, i.e. transcribing information from one optical record carrier on to one or more similar or dissimilar record carriers

Abstract

A disk-shaped recording medium includes a transparent substrate, and an optical recording layer formed on the transparent substrate. A light source emits light. An optical head is operative for applying the light to the optical recording layer from the light source via the transparent substrate, for focusing the light on the optical recording layer, and for reproducing information from the optical recording layer. A position detecting device is operative for detecting at least one of a pit depth and a physical position of information which has a first given relation with a specified address and which is recorded on the recording medium, and for generating first positional information representing at least one of the pit depth and the physical position. A previously-recorded secret code is reproduced from the recording medium. The secret code represents second positional information. The secret code is decoded into the second positional information. The second positional information represents at least one of a predetermined reference pit depth and a predetermined reference physical position. The first positional information and the second positional information are collated, and a check is made as to whether or not the first positional information and the second positional information are in a second given relation. When the first positional information and the second positional information are not in the second given relation, one of outputting of a reproduced signal of the recording medium, operation of a program stored in the recording medium, and decoding of the secret code is stopped.

Claims

1. A reproducing apparatus comprising:

reproducing means for reproducing encryption-resultant information from a recording medium;

decrypting means for decrypting the reproduced encryption-resultant information into decryption-resultant information representing a physical feature of the recording medium;

detecting means for detecting the physical feature of the recording medium and generating physical-feature information representative of the detected physical feature;

deciding means for deciding whether or not a predetermined relation exists between the decryption-resultant information and the physical-feature information; and

suspending means for suspending a specified action when said deciding means decides that the predetermined relation does not exist between the decryption-resultant information and the physical-feature information.

2. A reproducing apparatus as recited in claim 1, wherein the decrypting means comprises signal responsive means for decrypting the reproduced encryption-resultant information into the decryption resultant information in response to a signal representing a public key.

3. A reproducing apparatus as recited in claim 2, wherein the signal representing the public key includes an RSA signal.

4. A method comprising the steps of:

reproducing encryption-resultant information from a recording medium;

decrypting the reproduced encryption-resultant information into decryption-resultant information representing a physical feature of the recording medium;

detecting the physical feature of the recording medium and generating physical-feature information representative of the detected physical feature;

deciding whether or not the decryption-resultant information and the physical-feature information are in a specified relation; and

suspending a specified action when it is decided that the decryption-resultant information and the physical-feature information are not in the specified relation.

5. A method as recited in claim 4, further comprising the step of providing a negative indication when it is decided that the decryption-resultant information and the physical-feature information are not in the specified relation.

6. A method as recited in claim 4, wherein said decrypting step comprises decrypting the reproduced encryption-resultant information into the decryption-resultant information in response to a signal representing a public key.

7. A method as recited in claim 6, wherein the signal representing the public key includes an RSA signal.