摘要:
A server apparatus includes a CPU, a RAM, a cipher processing unit for carrying out encryption and decryption, a communication processing unit for carrying out communication with an information processing terminal, and a data storage unit for storing information that does not require confidentiality. The server apparatus also includes a distribution information storage unit for storing information such as a program to be distributed, and a specific information distribution history holding unit for holding a specific information distribution history for managing a record of a program specific information of a program previously distributed to the information processing terminal.
摘要:
The server apparatus (120) includes a CPU (121), a RAM (122), a cipher processing unit (123) for carrying out encryption and decryption, a communication processing unit (124) for carrying out communication with an information processing terminal (100), a data storage unit (125) for storing information that does not require confidentiality, a distribution information storage unit (126) for storing information such as a program to be distributed, and a specific information distribution history holding unit (140) for holding a specific information distribution history (600) for managing a record of a program specific information of a program previously distributed to the information processing terminal (100).
摘要:
A management apparatus stores pairs of copyrighted contents and numbers of permitted check-outs. On being requested to perform check-out for a semiconductor memory card, the management apparatus records an audio object (AOB) corresponding to a content in the semiconductor memory card, assigns a content ID to the AOB, and decrements a corresponding number of permitted check-outs. An editing and playback apparatus plays back the AOB recorded in the semiconductor memory card. The editing and playback apparatus edits the AOB and assigns a content ID, which is the same as the content ID of the original AOB, to each new AOB obtained by the editing. A local storage holds history information including a media ID and the content ID assigned to the original AOB. On being requested to perform check-in for the semiconductor memory card, the management apparatus sets, in a non-playable state, the AOB assigned a content ID that is the same as the content ID in the history information and increments the number of permitted check-outs.
摘要:
Area management information is cached in a cache memory by controlling the access size when an information processor accesses the area management information in an information recording medium. When the processing content of the information processor is to retrieve a free area from the area management information, a physical management block size determined from the physical characteristics of the information recording medium is used. When the processing content is to acquire a link destination from the area management information, minimum access unit of the information recording medium is used. Consequently, overhead can be lessened when the area management information is accessed.
摘要:
A memory controller (220) that controls the writing of data into or the reading of data from a non-volatile memory (230) includes a host interface unit (210) and a host information management unit (223). The host interface unit (210) receives an application ID identifying an application used when recording user data into the non-volatile memory (230) and a device ID identifying an external device (100) that uses the stated application. The host information management unit (223) records a host information table indicating a correspondence relationship between the application ID and the device ID into the non-volatile memory. The memory controller (220) can thus easily determine by what data processing device the data stored in a non-volatile storage device (200) attachable to/removable from the external device (100) has been updated.
摘要:
In a file system such as an FAT file system, clusters are linked only in the forward direction. To perform seeks to clusters in the reverse direction, links need to be followed from the beginning side of the file data in every seeking operation. When a large amount of data is subjected to such reverse seeking, the overhead will be particularly large. A memory controller (101) for controlling data writing or reading to or from an information recording medium includes a control unit (105) that detects continuity of data in an address space of a file system managing data that is recorded into the information recording medium and a data-continuity management unit (103) that stores information about the continuity of the data as data-continuity information.
摘要:
The invention presents an encrypted content playback equipment capable of decryption and playback of an encrypted content by using key information when a key medium storing the key information is not inserted, an encrypted content playback method, a program, and a recording medium for storing the program.An encrypted content playback equipment 100 obtains key information 1 for a key medium 120, and stores the key information 1 in a provisional-key storage memory 102 as provisional key 1a, and obtains provisional-key usage limitation information 2 for limiting the use of provisional key 1a from the key medium 120. The encrypted content playback equipment 100 judges whether the provisional key 1a is usable or not based on the provisional-key usage limitation information 2, and if usable, plays back an encrypted content 3 by using the provisional key 1a.
摘要:
An information processing device that reads out and records data from and on an information recording medium includes a file system controller. File system control information is constructed in a system memory within the information processing device, and the file system controller unifies and controls a plurality of information recording media which are managed by individual file systems into a single virtual file system. In addition, the file system controller manages a priority order that indicates an information recording medium to be utilized with priority if files having the same name exist. This priority order can be changed in response to a request from an application program. Thus, the processor can unify and manage the plurality of information recording media and, also, enables the application to access all of the files having the same name.
摘要:
A content search device calculates the number of valid encrypted contents as comparison objects contained in encrypted content databases and the number of valid decryption keys contained in decryption key databases. The database having the smaller number is decided to be a reference database. By successively reading out entries contained in the reference database, a combination of an encrypted content and a corresponding decryption key is searched.
摘要:
A system including a secure LSI 1 establishes a communication path to/from a server 3 (UD1), and receives a common key-encrypted program generated by encryption with a common key and transmitted from the server 3 (UD6 and UD7). The received common key-encrypted program is decrypted to generate a raw program, and the raw program is re-encrypted with an inherent key to newly generate an inherent key-encrypted program, which is stored in an external memory.