Recording medium reproducer, cryptocommunication system and program license system

• US 7,827,111 B2
• Filed: 03/26/2004
• Issued: 11/02/2010
• Est. Priority Date: 10/09/1995
• Status: Expired due to Fees

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Tanaka, Shinichi, Takemura, Yoshinari, Oshima, Mitsuaki, Gotoh, Yoshiho, Koishi, Kenji, Moriya, Mitsurou
• Primary Examiner(s): Agwumezie; Charles C
• Application Number:
  US10/809,904
• Publication Number:
  US 20040181489A1
• Time in Patent Office: 2,412 Days
• Field of Search: 705/50, 705/56, 705/57, 380/28, 380/201, 380/202, 380/203, 380/204, 386/46, 386/95
• US Class Current: 705/56
• CPC Class Codes: G06F 21/1014 to tokens
• CPC Class Codes: G06K 1/126 by photographic or thermographic registration recording apparatus for measuring instruments G01D15/00
• CPC Class Codes: G06K 19/04 characterised by the shape
• CPC Class Codes: G06K 19/06028 using bar codes
• CPC Class Codes: G06K 19/08 using markings of different kinds or more than one marking of the same kind in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means
• CPC Class Codes: G06K 19/14 the marking being sensed by radiation
• CPC Class Codes: G06K 2019/06271 Relief-type marking
• 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 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 19/12 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 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 20/00115 wherein the record carrier stores a unique medium identifier
• CPC Class Codes: G11B 20/00123 the record carrier being identified by recognising some of its unique characteristics, e.g. a unique defect pattern serving as a physical signature of the record carrier
• CPC Class Codes: G11B 20/00137 involving measures which result in a restriction to contents recorded on or reproduced from a record carrier to authorised users
• CPC Class Codes: G11B 20/00144 involving a user identifier, e.g. a unique customer ID
• CPC Class Codes: G11B 20/00152 involving a password
• CPC Class Codes: G11B 20/00173 wherein the origin of the content is checked, e.g. determining whether the content has originally been retrieved from a legal disc copy or another trusted source
• CPC Class Codes: G11B 20/00181 : using a content identifier, e.g. an international standard recording code [ISRC] or a digital object identifier [DOI]
• 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 20/00195 : using a device identifier associated with the player or recorder, e.g. serial numbers of playback apparatuses or MAC addresses
• CPC Class Codes: G11B 20/0021 : involving encryption or decryption of contents recorded on or reproduced 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 20/0026 : the key being stored as a barcode
• CPC Class Codes: G11B 20/00268 : said barcode being recorded in a burst cutting area [BCA]
• CPC Class Codes: G11B 20/00326 : the key being embossed on the record carrier
• CPC Class Codes: G11B 20/00347 : wherein the medium identifier is used as a key
• CPC Class Codes: G11B 20/00492 : wherein content or user data is encrypted
• CPC Class Codes: G11B 20/00514 : wherein the entire content is encrypted with the same key, e.g. disc key or master key
• CPC Class Codes: G11B 20/00528 : wherein each title is encrypted with a separate encryption key for each title, e.g. title key for movie, song or data file
• CPC Class Codes: G11B 20/00543 : wherein external data is encrypted, e.g. for secure communication with an external device or for encrypting content on a separate record carrier
• CPC Class Codes: G11B 20/00586 : said format change concerning the physical format of the recording medium
• CPC Class Codes: G11B 20/0071 : involving a purchase action
• CPC Class Codes: G11B 20/0084 : wherein the usage restriction can be expressed as a specific time or date
• CPC Class Codes: G11B 20/00855 : involving a step of exchanging information with a remote server
• 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 20/10 : Digital recording or reproducing
• CPC Class Codes: G11B 20/1217 : on discs
• CPC Class Codes: G11B 20/1252 : for discontinuous data, e.g. digital information signals, computer programme data
• CPC Class Codes: G11B 20/1403 : characterised by the use of two levels
• CPC Class Codes: G11B 20/1426 : conversion to or from block codes or representations thereof
• 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 2007/0013 : for carriers having multiple discrete layers
• CPC Class Codes: G11B 2020/1259 : with ROM/RAM areas
• CPC Class Codes: G11B 2220/2545 : CDs
• CPC Class Codes: G11B 2220/2562 : DVDs [digital versatile discs]; Digital video discs; MMCDs; HDCDs
• CPC Class Codes: G11B 23/0042 : with provision for auxiliary features sensing such features G11B17/00, G11B19/02
• CPC Class Codes: G11B 23/284 : on the record carrier
• CPC Class Codes: G11B 23/30 : with provision for auxiliary signals
• CPC Class Codes: G11B 23/38 : Visual features other than those contained in record tracks or represented by sprocket holes the visual signals being auxiliary signals
• 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 5/86 : Re-recording, i.e. transcribing information from one magnetisable record carrier on to one or more similar or dissimilar record carriers by varying the order of the information G11B27/029, G11B27/036
• CPC Class Codes: G11B 7/0037 : with discs
• CPC Class Codes: G11B 7/005 : Reproducing G11B7/0065 takes precedence
• 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 7/26 : Apparatus or processes specially adapted for the manufacture of record carriers

Abstract

The operating and other procedures of a disk or recording medium application system of the type for which a network is used are simplified. Disks or recording media have auxiliary data recording areas, where different IDs for individual disk, and/or cipher keys and/or decoding keys for ciphers are recorded in advance in a factory. By using the IDs to release the soft ciphers, and using the cipher keys when sending the ciphers, and using the decoding keys when receiving the ciphers, user authorization procedures are simplified.

Claims

1. An optical disk comprising:

a first recording area having a main data and control data area with such data recorded therein as pits,

a second recording area located radially inward of the first recording area and having auxiliary information including disk identification information unique to said optical disk recorded therein,

wherein said auxiliary information is recorded as circumferentially arranged multiple stripe patterns on pits, each stripe of which extends along a radius of the disk; and

a control data area in the first recording area comprising an auxiliary information presence indicator indicating whether said stripe patterns are present or not in the second recording area,

wherein said stripe patterns have a lower reflectivity than an average reflectivity of an area between one stripe pattern and another stripe pattern.

2. A reproducing method for an optical disk comprising a first recording area having a main data and control data area with such data recorded therein as pits, a second recording area located radially inward of the first recording area and having auxiliary information including disk identification information unique to said optical disk recorded therein, wherein said auxiliary information is recorded as circumferentially arranged multiple stripe patterns on pits, each stripe of which extends along a radius of the disk, and a control data area in the first recording area comprising an auxiliary information presence indicator indicating whether said stripe patterns are present or not in the second recording area, wherein said stripe patterns have a lower reflectivity than an average reflectivity of an area between one stripe pattern and another stripe pattern, the method comprising:

reproducing said first recording area and said second recording area by the same optical pickup; and

detecting a signal of said stripe patterns from a reproducing signal of said second recording area by detecting a signal lower than a certain slice level for reproducing a signal of said second recording area.