Fujitsu Corporation

Other

Sanyo Electric Co., Ltd.

Renesas Electronics Corporation

Fijitsu Limited

Makoto Yoshioka

Ryota Akiyama

Takayuki Hasebe

Mitsuhiro Kokubun

Gengo Tazaki

Keiichi Murakami

Toshio Shinjo

Haruhiko Tsunoda

Kazuharu Hasegawa

Hidefumi Aoe

Hiroyuki Yamamoto

Seigo Kotani

Kenichi Utsumi

Seiichi Iwasa

Hideyuki Motoyama

Takahisa Hatakeyama

Shinichi Yoshimoto

Nobuhisa Shigemi

John W Mackin

Hiroaki Negishi

Yoshihiro Hori

Toshiaki Hioki

Kazuo Nakashima

Mineo Moribe

Miwa Kanamori

Hideyuki Hirano

Satoshi Itami

Takehiko Hayashi

Yoshiaki Uchida

Kouichi Kanamoto

Kazunori Naito

Takeaki Anazawa

Tadaaki Tonegawa

Yuzuru Koga

Masayuki Ishizaki

Koichi Ogawa

Satoshi Kataoka

Masataka Takahashi

Akio Munakata

Masao Fujiwara

Yuji Miyazawa

Tatsuro Masuda

A storage area allocation method for allocating a storage area with a requested allocation size area may include receiving an allocation request for a storage area that includes the requested allocation size, acquiring an available storage area whose size is a smallest size of a product of all of the product of power-of-2 sizes and the region allocation unit size encompassing the requested allocation size from the region; obtaining a binary expression whose value is the requested allocation size divided by the allocation unit size; and allocating a contiguous storage area comprised of storage areas each of whose size is a product of the allocation unit size and a power of 2 of a value of a bit position wherein a 1 is set in the binary expression and which contiguous storage area is conjoined by the storage areas in a sequence of magnitude of sizes of the storage areas.

Storage region management method, storage region allocation method and program

To provide a technology that, regardless of the capacity of a storage device, enables its areas to be flexibly partitioned and managed, and, when a file is allocated to a region also, can also use its areas effectively by means of an efficient method. When a region size of a storage device is expressed as the sum of mutually differing power-of-2 values, and areas whose size is one of the power-of-2 sizes configuring that sum are taken to be master partitions, to partition the areas into partitions each of whose size is the size made by successively dividing each master partition in half and to generate an allocation table holding allocation information expressing the allocation status of each of the files that have partitions with each of the sizes included in the master partitions. To manage a region based on the allocation information stored in the allocation table.

Region management apparatus, region management method, and program

A storage area management method for a data storage apparatus partitions an acquired storage area into storage areas with differing power-of-2 sizes and manages each of them. Also, a storage area allocation method receives an allocation request for a storage area that includes a requested allocation size, and acquires an available storage area whose size is the smallest power-of-2 size encompassing the requested allocation size, and obtains a binary expression of the requested allocation size, and in response to the received allocation request, allocates a contiguous storage area comprised of storage areas each of whose size is a power of 2 of a value of a bit position wherein a 1 is set in the binary expression.

A memory card () stores access restriction information (AC) to a license information hold unit () arranged in a TRM area. Access restriction information (AC) has information for example of a frequency of reproduction allowed and a number of licenses owned. A controller () in reproducing and transferring content initially confirms access restriction information (AC) and thereafter effects reproduction and transfer and after the reproduction and transfer are effected updates access restriction information (AC), as required, for storage in a license information hold unit ().

Data distribution system and recording device for use therein

This invention provides an input switchover means for switching input routes according to the type of medium or communications, a software management means for decoding encrypted software information and for managing monetary charges according to the usage amounts of this software, an information conversion section for converting decoded data outputted from the previously mentioned software management means to visible or audible data, and an output route switchover means for outputting to the previously mentioned software management means encrypted software data, and for outputting to the previously mentioned information conversion section non-encrypted software information.

Software reproduction apparatus

A storage medium stores encrypted electronic data, a medium personal number which is unique for each storage medium and encrypted permission information. At least the medium personal number is written onto the storage medium in an un-rewritable form which a user computer cannot rewrite.

Storage medium for preventing an irregular use by a third party

A CD-ROM is recorded with a CD-ROM effective period and an effective period of a content stored in the CD-ROM. A CD-ROM effective period judging section of a personal computer reads the effective periods, compares these periods with a machine date generated by a machine date generating section and enables a purchase slip transmitting section to transmit a purchase slip only when the machine data falls within the effective periods. A CD-ROM effective period judging section of a center compares the present date with the CD-ROM effective period and the content effective period registered on a goods master, reads the key from the goods master and transmits the key to the personal computer only when both of a CD-ROM number and a content ID written onto the received purchase slip fall within the effective periods.

Content sales period verifying system and content decryption key effective period verifying system

A content usage control system comprises a copyright holder system, content server, license server and user system. The ACL setting section of the copyright holder system sets a license ACL expressed as a structure by a combination of logic sums and logic products of a plurality of partial licenses for the content, based on the user ID and a plurality of physical element IDs including media used in the user system, and stores the license ACL in an access control list. The license server controls the usage of the content by the user utilizing the access control list.

Content usage control system, content usage apparatus, computer readable recording medium with program recorded for computer to execute usage method

When encoding software, two or more encoding algorithms are employed. Conversely, for software decoding processing, decoding algorithms are prepared that correspond to these two or more encoding algorithms. Then, in software encoding processing, encoded algorithm combination identification information is transferred to the software decoding processing along with the encoded software. During software decoding processing, opposite algorithms possessed by the decoding means are selected based on the previously mentioned algorithm combination identification information, and the previously mentioned encoded software is decoded.

Software encoding using a combination of two types of encoding and encoding type identification information

A random-number generator generates first and second title keys on the basis of random numbers. A first DES encryption circuit for the title encrypts input data with the first title key. Initial values of this item of input data are a data identifier (ID) and program clock reference (PCR) that are extracted from a packet header. After completing the encryption of the initial values, a result of an encryption by a second DES encryption circuit for title serves as the input data for the first DES encryption circuit for title. The second DES encryption circuit for title encrypts a value of result of the encryption by the first DES encryption circuit for title with the second title key. An exclusive OR circuit outputs an exclusive OR of the data stored in the packet and a value of result of the encryption by the second DES encryption circuit for title. This exclusive OR turns out encrypted data.

Encryption processing system

A structured data management system which provides services concerning a structured electronic data object. In this system, a structured data storage unit stores a plurality of structured data objects associated with each other. Each structured data object can be represented as a tree structure constructed by a plurality of data elements, or nodes. Further, the individual nodes of a tree structure are associated with their respective process scripts. Through an input/output interface unit, a message addressed to a certain destination node arrives. Upon receipt of the message, a structured data processing unit identifies the destination node by tracing the tree structure of a particular structured data object where the destination node resides. The structured data processing unit then executes a process script associated with the destination node being identified. During the execution of this process script, the structured data processing unit may encounter another message that is addressed to a node in a different structured data object. In this case, the structured data processing unit reads out the specified object from the structured data storage unit and executes a process script of that node.

Structured data management system and computer-readable method for storing structured data management program

A structured data management system capable of easily changing the definition of a logical structure and controlling semantics described in data adapted to the defined structure as intended by persons who have defined the logical structure. A contents model defines an internal structure of a contents description. The contents description describes data to be managed according to the contents model. An operation description is coupled to the contents model and manipulates data in the contents description depending on the structure of the data in the contents description. The operation description functions to define semantics of each element of the structure defined by the contents model. An operation description executing unit executes the operation description coupled to the contents model. A structure managing unit verifies and manages the structure of the contents description according to the contents model.

Structured data management system and computer-readable recording medium storing structured data management program

A program ID is provided for each authoring program, the program ID of the authoring program is copied to the program ID whenever the authoring program processes contents, and contents ID are newly generated and provided also for each contents. Thereby, the management of an authoring program or contents such as assuring of copyright, preventing of alteration, or maintaining of security is simplified.

Information management method and recording medium

A goods master is stored with sales prices and sales effective periods of respective contents. A contract master is stored with data as to whether the sales price can be reduced. A key sales section charges a content purchaser for the sale price stored in the goods master. An updating section compares the present time with a sales effective period recorded on the goods master and reduces the sales price recorded on the goods master as far as the contract master is recorded with data indicating that the sales price can be reduced for a content with a remainder of the sales effective period being one month or less.

Content sales price accounting system and accounting method thereof

In an information management system, individual entity information items related to one another are assigned unique identifiers. A smaller number of pointers are used to define high, low, front and rear-rank links among the entity information items. In an entity management table are placed records having a pointer to an entity information item and an identifier of the entity information item. In a structure management table are placed records representing types of the entity information items and having pointers to high, low, front and rear-rank records. There is further provided an identifier management table that relates the types of the entity information items to the identifiers. Use of these tables permits data retrieval in four directions of upward, downward, forward and rearward.

Information management system

Growing community of inventors

Kawasaki, Japan

Makoto Yoshioka