Optical disk reading device using both a decipher key and disk identification information

• US 6,343,282 B1
• Filed: 11/30/1999
• Issued: 01/29/2002
• Est. Priority Date: 10/09/1995
• 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: Tanaka, Shinichi, Oshima, Mitsuaki, Gotoh, Yoshiho, Koishi, Kenji, Moriya, Mitsurou, Takemura, Yoshinari
• Primary Examiner(s): Trammell, James P.
• Assistant Examiner(s): Dixon, Thomas A.
• Application Number:
  US09/450,413
• Time in Patent Office: 791 Days
• Field of Search: 705/59, 705/58, 705/57, 705/50, 705/1, 705/51, 713/190, 369/54, 369/57, 369/58, 369/59, 369/84
• US Class Current: 705/57
• 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

A device for reading encrypted information recorded on an optical disk having first and second recording areas, the device can read disk identification information recorded in the second recording area, select a specific decipher key among multiple decipher keys, and decrypt encrypted information from the optical disk using both the disk identification information unique to that optical disk and the specific decipher key.

Claims

1. An information reproducing device for reading encrypted information recorded on an optical disk comprising a first recording area and a second recording area, said device comprising:

means for reading disk identification information recorded in a second recording area of such an optical disk said means including an optical head which is also capable of reading information recorded in the first recording area;

means for selecting a specific decipher key from multiple decipher keys; and

means for decrypting encrypted information read from an optical disk using at least both said disk identification information unique to said optical disk and said specific decipher key.

2. The information reproducing device of claim 1, wherein said means for selecting a specific decipher key includes means for reading key identification information.

3. The information reproducing device of claim 1, wherein said device further comprises:

means for demodulating encrypted information recorded by a first modulation method; and

means for demodulating disk identification information recorded by a second modulation method.

4. The information reproducing device of claim 1, wherein said disk identification information recorded in said second recording area of an optical disk comprises circumferentially arranged multiple stripe patterns each stripe of which extends along a radius of the optical disk.

5. The information reproducing device of claim 1, wherein said second recording area is disposed within said first recording area.

6. An information reproducing device for reading encrypted information recorded on an optical disk comprising a first recording area and a second recording area, said device comprising:

means for reading disk identification information recorded in a second recording area of such an optical disk;

means for selecting a specific decipher key from multiple decipher keys;

means for demodulating encrypted information recorded by a first modulation method using 8-16 modulation;

means for demodulating disk identification information recorded by a second modulation method; and

means for decrypting encrypted information read from an optical disk using at least both said disk identification information unique to said optical disk and said specific decipher key.

7. The information reproducing device of claim 6, wherein said means for demodulating encrypted information demodulates information using 8-16 modulation as said first modulation method, and said means for demodulating disk identification information demodulates information modulated using phase encoded (PE) modulation as said second modulation method.

8. An information reproducing device for reading encrypted information recorded on an optical disk comprising a first recording area and a second recording area, said device comprising:

means for reading disk identification information recorded in a second recording area of such an optical disk;

means for selecting a specific decipher key from multiple decipher keys;

means for demodulating encrypted information recorded by a first modulation method;

means for demodulating disk identification information recorded by a second modulation method using phase encoded (PE) modulation; and

means for decrypting encrypted information read from an optical disk using at least both said disk identification information unique to said optical disk and said specific decipher key.