摘要:
A method of recording and/or reproducing data to and/or from a recording medium is provided. A user identification data read from a recording medium having recorded therein main data to be recorded and/or reproduced and the user identification data is compared with a one read from a data recorder/player for recording or reproducing the main data, and the main data are recorded to or reproduced from the recording medium when the user identification data read from the recording medium is coincident with that read from the data recorder/player.
摘要:
An information reproducing method and an information reproducing device in which the key renewal block (KRB) of the latest verison is selectively used to encrypt the content to store the encrypted contents in a recording medium. A plural num er of KRBs of different generations and versions are stored in a recording medium. If the latest KRB is detected, it is stored in a memory unit within the recording and/or reproducing device. A plural number of KRBs having plural different generations or versions are stored on the recording medium. With the present method and device, in storing the content in the recording medium, the latest usable one of the KRB in the memory unit of the reproducing device and plural KRBs on the recording medium is detected to acquire an encrypting key, such as a media key, to execute the content encryption. In this manner, the encrypted content based on a KRB of a newer version can at all times be stored on the recording medium.
摘要:
When a player cannot play back data because a master key held by the player has a generation older than the generation of a master key having been used for recording the data, or when a recorder cannot record data because a master key held by the recorder has a generation older than the generation of a master key necessary for recording to a recording medium, the user is prompted to renew the master key for acquisition of the necessary master key, thereby enabling the data playback or data recording. The renewed master key is distributed in such a form that can be processed by a specific device via a transmission medium such as a recording medium, network, IC card, telephone line, for example, via a tree-structured distribution system.
摘要:
An information generating apparatus (C) for generating output information to be outputted is provided with: an error correcting code adding device (2) for adding an error correction code (31, 32), which is used for an error correction of the output information when the output information is outputted, to the output information to thereby generate the output information having the error correction code; and a replacing device (3) for replacing a part of the output information having the error correction code, which is generated by the error correcting code adding device, with identification information (35) indicating that the output information to be outputted is not illegally copied to thereby generate the partially replaced output information and for replacing another part of the output information having the error correction code with position information (PP) indicating a position of the identification information within the partially replaced output information.
摘要:
A data transmitting/receiving unit receives electronically allotted encrypted digital data for recording on a primary recording medium. Digital data use provider-dependent different encryption systems and contain attribute information describing encryption systems. Digital data retrieved at a data retrieving unit is judge for an encryption system at a judging unit and is decoded at one proper decoding unit. An inherent information acquiring unit acquires identification information of a secondary recording medium or a reproducing device depending on whether or not the second recording medium is mountable/demountable to/from the reproducing device. An encryption system instructing unit selects one encrypting unit out of a plurality of encrypting units based on the acquired identification information. The one encrypting unit creates an encryption key based on the identification information and encrypts digital data. A recording unit records digital data on the secondary recording medium, and an accounting unit charges costs according to accounting information described in the attribute information.
摘要:
Pour enregistrer un message (3) embrouillé dans un décodeur (2) de télévision à l'aide d'une clé (10) afin d'y accéder à une date différée on enregistre le message embrouillé dans une mémoire (11) du décodeur et on chiffre la clé en utilisant des paramètres (13) d'identification uniques du décodeur. Ainsi, le message embrouillé ne pourra être accessible qu'avec le décodeur qui a permis de chiffrer la clé permettant de désembrouiller le message ainsi enregistré. On peut ainsi visualiser en clair et donc enregistrer un message embrouillé en ayant les droits d'accès à ce message et le regarder à une date ultérieure même si on n'a plus les droits d'accès, la date ultérieure arrivant par exemple après une date limite de validité de ces droits.
摘要:
A data processing apparatus is disclosed, that comprises a large capacity memory means for storing a plurality of files, a memory means for storing move/copy history when a particular file is moved/copied from the large capacity memory means to a non-volatile memory, a reference menas for referencing the history information stored in the memory means when the particular file is moved/copied from the large capacity memory means to the non-volatile memory, and a control means for prohibiting the particular file from being moved/copied from the large capacity memory means to the non-volatile memory when the reference means has detected that the history information is stored in the memory means.
摘要:
In a mutual authentication method for use between a recording apparatus which records copied contents on a recording medium having an arithmetic processing function, and the recording medium, the method includes a step of storing in the recording medium at least first information (MID) which depends on the recording medium, and second information (SMID) which is to be shared by the recording apparatus in executing mutual authentication with the recording apparatus and depends on the recording medium, and a step of generating by the recording apparatus authentication information (K M [MID]) used in mutual authentication with the recording medium on the basis of the first information (MID) obtained from the recording medium, and executing mutual authentication between the recording apparatus and the recording medium using the generated authentication information (K M [MID]) and the second information (SMID).