摘要:
A memory card and a recording/playback device are provided that are capable of deterring a memory card manufacturer from illicitly storing a same media ID on a plurality of memory cards. A memory card (100) includes a media ID storage module unit (610) and a memory unit (120). The media ID storage module unit (610) includes a media ID storage unit (611) that stores therein a media ID that is specific to the memory card, and a certification unit (609) that generates certification information that certifies the validity of the memory card based on the media ID. The memory unit (120) includes an encrypted content storage unit (122) for storing encrypted digital content. The recording/playback device (200) includes a memory card verification unit (200) that acquires the certification information from the memory card (100), verifies the validity of the memory card (100) based on the acquired certification information, and when the verification has failed, prohibits decrypting an encrypted content or encrypting a content, and a content encryption unit (209) that, when the verification has succeeded, encrypts the digital content or decrypts the encrypted digital content.
摘要:
Offenbart ist ein Verfahren und eine Anordnung (1) zur Herstellung und Zugriffskontrolle auf ein verschlüsseltes Dateisystem (14) eines Speichermediums, wobei das Speichermedium eine individuelle Kennung aufweist, die mit einem auf dem Speichermedium hinterlegten und dem Dateisystem (14) zugeordneten Schlüssel verglichen wird. Erfindungsgemäß wird aus der Kennung des Speichermediums und einer Referenz auf einen Schlüssel einer Schlüsselgruppe (10) ein Teilschlüssel gebildet, wobei der Zugriff auf das Dateisystem (14) erlaubt wird, wenn Kennungen mit korrekter Relation zueinander vorliegen und der referenzierte Schlüssel vorhanden ist. Des Weiteren ist ein Speichermedium gemäß einem derartigen Verfahren offenbart.
摘要:
[PROBLEMS] To provide a magnetic card reader system in which a magnetic head and a computer can determine mutual validity, and unauthorized duplication of the magnetic card can be prevented. [MEANS FOR SOLVING PROBLEMS] In a magnetic card reader system (10), a computer (13) and a microprocessor perform authentication of each other. When the mutual authentication is successful, the microprocessor encrypts a digital signal and transmits the encrypted digital signal to the computer (13), and the computer (13) decodes the encrypted digital signal.
摘要:
A user terminal (20) converts stored contents of an SD card (SDq) to contain second encrypted content key data (Enc (Kmu, Kc)) equivalent to an encrypted title key of SD Audio, and encrypted content (Enc (Kc, C)) equivalent to encrypted content of the SD Audio. Accordingly, compatibility can be realized between an encryption dual key system as a first encryption system and an encryption (single) key system as a second encryption system.
摘要:
A recording arrangement operable to apply access control processing to input data content using a set of one or more content keys and to record access-controlled data content on a content storage medium, the arrangement comprising:
an encryption apparatus having means for encrypting portions of the data content in dependence upon the set of content keys; and an interface to provide a secure data connection between the encryption apparatus and an access control memory device; an access-control memory device connected to the encryption apparatus via the interface and operable to store securely information from which the private key is derivable; the encryption apparatus and the access-control memory device co-operating to provide means for generating content access control data comprising at least one encrypted version of a respective subset of the set of content keys, the content access control data being generated in dependence upon at least one public key of a respective public key / private key pair associated with a further access-control memory device so that decryption of the set of content keys requires access to a private key of the respective public key / private key pair, the at least one public key used in the generation of the content access control data depending on data stored by the access-control memory device; and the recording arrangement having means for recording the encrypted information content and the content access control data on the content storage medium such that the information content may selectively be decrypted in dependence upon access to the private key of the respective public key / private key pair.
摘要:
An audio recording and reproducing apparatus includes a controller for controlling the entire behaviors, hard disc for write and read of audio data, audio compression/expansion circuit for expanding compressed audio data, and external I/O port. The audio recording and reproducing apparatus is connected to a network service center to obtain desired music data from storage of the network service center and to store it in the hard disc.
摘要:
A picture retrieval system is disclosed which comprises a record carrier (184) and a read device (11). A coded picture (8 TV, 16 TV, 64 TV, 256 TV) composed of consecutive coded picture lines is recorded in a continuous track (20) of the recorded carrier (184). The read device comprises means which scan the track by means of a read head (280) to read coded picture lines recorded in the track and means for moving the read head (280) to a track portion having a selected address with a certain search accuracy. Together with the coded picture lines (APDB) a line number (LN) and a line synchronization are recorded in the track (20). The line number specifies the sequence number of the relevant picture line in the coded picture. The line synchronization specifies the beginning of the relevant picture line. Moreover, addresses (ADLN#1,..., ADLN#1009) for a number of coded picture lines of the coded picture are recorded in a portion (IIDB) of the track, to specify the positions where the relevant picture lines have been recorded in the track (20). The device further comprises means (140) for searching a coded picture line on the basis of the addresses read from the track portion (IIDB).
摘要:
A leading read apparatus (401) and a trailing read apparatus (403) include all of the necessary front-end electronics to provide a square wave output. Each of the leading read apparatus (401) and the trailing read apparatus (403) includes a current amplifier (403) and a zero crossing detector (420). The processing device (404) includes a transition detector (406), a counter (412), and a second transition detector (406). The processing device (404) is connected to a memory (410).
摘要:
A leading read apparatus (401) and a trailing read apparatus (403) include all of the necessary front-end electronics to provide a square wave output. Each of the leading read apparatus (401) and the trailing read apparatus (403) includes a current amplifier (403) and a zero crossing detector (420). The processing device (404) includes a transition detector (406), a counter (412), and a second transition detector (406). The processing device (404) is connected to a memory (410).