Method and apparatus for transmitting and receiving a decoding key encoded with specific information to decode encrypted information of a record medium

• US 20050209968A1
• Filed: 03/24/2005
• Published: 09/22/2005
• Est. Priority Date: 06/30/1995
• Status: Active Grant

• Current Assignee: Akira Kurihara, Hideo Owa, Isao Kawashima, Yoichiro Sako, Yoshitomo Osawa
• Original Assignee: Akira Kurihara, Hideo Owa, Isao Kawashima, Yoichiro Sako, Yoshitomo Osawa
• Inventors: Osawa, Yoshitomo, Sako, Yoichiro, Kurihara, Akira, Owa, Hideo, Kawashima, Isao
• Granted Patent: US 7,246,096 B2
• Time in Patent Office: Days
• US Class Current: 705/51
• CPC Class Codes: G06F 21/1011 to devices
• CPC Class Codes: G06F 2211/007 Encryption, En-/decode, En-/decipher, En-/decypher, Scramble, (De-)compress
• CPC Class Codes: G06Q 20/3829 involving key management
• 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 20/00144 involving a user identifier, e.g. a unique customer ID
• CPC Class Codes: G11B 20/00152 involving a password
• CPC Class Codes: G11B 20/00188 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 20/00246 wherein the key is obtained from a local device, e.g. device key initially stored by the player or by the recorder
• CPC Class Codes: G11B 20/00304 the key being stored in the lead-in area [LIA]
• 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 20/00492 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

Abstract

A data recording apparatus capable of preventing easily copying of information is disclosed with which, even if information is copied, the copied information cannot be reproduced, the data recording apparatus having a terminal to which encoder ID specific for the data recording apparatus is input, a recording unit for recording at least the encoder ID on an optical disk, and an encoding circuit for, in accordance with the encoder ID, encoding data supplied through a terminal and required to be recorded so that encoded data is, together with the encoder ID, recorded on the optical disk.

Claims

1-69. -69. (canceled)

70. An information providing apparatus comprising:

transmitting and receiving means for transmitting and receiving information to and from an information collecting side through information transmitting means;

key encoding means which uses a plurality of specific information transmitted from said information collecting side and possessed by said information collecting side to encode key information required to decode encoded information recorded on a non-unique information medium, said plurality of specific information being non-specific to said information medium, and includes a user ID, a user password and a medium reading apparatus ID;

wherein the encoded key information is electronically transmitted to receiving means located at the collecting side which decodes the encoded key information by using said specific information,

determining means for determining whether a retrieval operation has been performed; and

display means for displaying retrieved content when the determining means determines that a retrieval operation has been performed.