Abstract: An apparatus stores first divided trust information which is one portion resulting from division of trust information generated by a transmission target apparatus that is a transmission target for data, receives a transmission request for the data from the target apparatus and receives second divided trust information which is the other portion resulting from division of the trust information of the target apparatus and verification information generated using information indicating a state of the target apparatus that made the request, recovers the trust information using the first divided trust information stored and the received second divided trust information, verifies trustworthiness of the target apparatus using the recovered trust information and the received verification information, transmits the data indicated by the request to the target apparatus when the verification of trustworthiness is successful.

Abstract: an apparatus comprises a data display unit which causes a display device to output display data that indicates a drawing screen complying with the display request, a reliability decision unit which decides a legality of a transmission source of the display request, and which makes an output request for information capable of confirming a reliability of the display data that the data display unit causes the display device to output, on the basis of a result of the decision, and an output unit which outputs the information capable of confirming the reliability of the display data as complies with the output request from the reliability decision unit, separately from the display data that is caused to be outputted by the data display unit.

Abstract: In a system for receiving and storing broadcast content data, a reception and storage device receives and stores a portion of broadcast content data in a storage unit, and then generates and stores a first piece of error check data for the data portion. The reception and storage device receives, from a further device, a second piece of error check data for a portion of the broadcast content data corresponding to the data portion stored in the storage unit, compares the first piece of error check data with the second piece of error check data to determine whether the first piece of error check data is valid, receives, if the first piece of error check data is determined to be invalid, the corresponding data portion associated with the second piece of error check data, from another reception and storage device, and corrects the stored data portion in the storage unit based on the received corresponding data portion.

Abstract: A secure device has an input unit for dividing content into a plurality of blocks and inputting the plurality of blocks, a key generating unit for sequentially generating keys for encrypting one or plural blocks, a content encrypting unit for encrypting the one or plural blocks by using the generated key, a key information generating unit for generating key information for restoring the generated key used for the encrypting by the generated key, and a storage control unit for outputting contents of each of the blocks encrypted by the content encrypting unit and the key information generated by the key information generating unit to an external storage. The key sequentially generated by the key generating unit is newly generated when a predetermined condition is satisfied, and varies by every one or plural blocks.

Abstract: An information processor has an information dispersing function, a dividing unit for dividing a first data (DT0) into n pieces of disperse information, and executing secret sharing scheme capable of restoring the first data (DT0) by using arbitrary k pieces (1<k<n) of disperse information out of the n pieces of disperse information, a first storage control unit for storing the arbitrary k pieces of disperse information generated by the dividing unit into plurality of portable recording devices, an editing unit for reconstructing the first data (DT0) by using the k pieces of disperse information stored in the plurality of recording devices and editing the restored first data (DT0), a difference generating unit, after the dividing unit divides a second data which is post-data (DT1) originated in the restored first data into n pieces of post-edit disperse information, for calculating the difference between post-edit disperse information corresponding to the recording device and pre-edit disperse informatio

Abstract: An information processing unit is an unit which has an information division recording function in which a file is divided and stored. The information processing unit includes a first storage section for storing a first partial file of a file divided, a second storage section for storing a second partial file, a state detection section for checking an operating state of the information processing unit and detecting that the operating state has changed in a specific manner, and a control section for performing a lock processing in accordance with the state detected to the second partial file stored on the second storage section when the state detected by the state detection section is determined as a risky state in which unauthorized access can be performed.

Abstract: A method of providing a service to a terminal device via the Internet from a service provision apparatus in response to access from the terminal device includes the steps of (a) establishing and maintaining connection between the service provision apparatus and a relay device specified by a global IP address on the Internet at a request for connection of the service provision apparatus so that the service provision apparatus and the relay device are in communication with each other via the Internet, (b) accessing the service provision apparatus for the service by way of the relay device from the terminal device connected thereto, and (c) providing the service from the service provision apparatus to the terminal device by way of the relay device.

Abstract: An IC chip, a board, information processing equipment, and a storage medium are provided that can prevent, even when information is transferred between a plurality of programs, leaking of a right protection algorithm of information in connection with the transfer, by generating an encryption key using a separately provided secure module and encrypting information to be stored into a main memory. Information processing equipment includes a security board being mounted thereon an IC chip having a secure module. In the information processing equipment, the secure module receives an encryption key request signal, from an external CPU that executes a program for transferring information; generates a communication encryption key every time when the encryption key request signal is received, the communication encryption key being used to encrypt information to be transferred between a plurality of programs; and supplies the generated communication encryption key to the external CPU.

Abstract: An IC chip, a board, information processing equipment, and a storage medium are provided that can prevent, even when information is transferred between a plurality of programs, leaking of the right protection algorithm of information in connection with the transfer. A security board is included an IC chip having a secure module. The secure module receives an encryption key request signal, and generates a communication encryption key every time when the encryption key request signal is received, the communication encryption key being used to encrypt information to be transferred between a plurality of programs. The number of times the communication encryption key is supplied is counted. If the counted number is equal to or less than a predetermined number, the communication encryption key is supplied to outside. If the counted number exceeds the predetermined number, the supply of the generated communication encryption key to outside is stopped.

Abstract: Provided is information processing apparatus, information processing method and a record medium, which can prevent occurrence of manipulation, in a case of accessing a memory, without consuming the access band of the memory. A main-processing unit, a sub-processing unit and a memory for loading a program are provided and process limit information stored in the memory is stored in storing means. The sub-processing unit judges whether a program to be executed is manipulated or not, and loads a program to be executed in the memory in case that the program is not manipulated. The sub-processing unit refers to the process limit information before execution of a program, and not permits execution of the program of the main-processing unit in case that a process by the main-processing unit for information stored in the memory accords with a process included in the process limit information.

Abstract: A home gateway which receives an e-mail and transmits a file as instructed by the e-mail, comprises: a mail receiver receiving an e-mail; a mail analyzer analyzing the e-mail received by the mail receiver and specifying a requested file for transmission; a file transmitter transmitting, to a web server on the Internet, the file specified by the mail analyzer; and a mail notification unit transmitting, to a terminal, an e-mail indicating that the file transmitter has transmitted the requested file to the web server.

Abstract: A method of providing a service to a terminal device via the Internet from a service provision apparatus in response to access from the terminal device includes the steps of (a) establishing and maintaining connection between the service provision apparatus and a relay device specified by a global IP address on the Internet at a request for connection of the service provision apparatus so that the service provision apparatus and the relay device are in communication with each other via the Internet, (b) accessing the service provision apparatus for the service by way of the relay device from the terminal device connected thereto, and (c) providing the service from the service provision apparatus to the terminal device by way of the relay device.

Abstract: A contents sharing system for general purpose use is provided, in which devices share contents distributed via a network, and contents can be shared even among devices of private addresses. The contents sharing system comprises plural devices connected with each other via a network. Each of the devices includes storage means for storing contents, communication means for connecting to the network and process means for executing a software program. Each of the devices generates a communication packet containing an identifier unique to the device and information indicating whether a connection address of the device is a global address or a private address. When a first device having a private address obtains contents held by a second device that belongs to the contents sharing system and has a private address, a third device that belongs to the contents sharing system and has a global address works as a proxy for file transmission.

Abstract: The invention allows easier determination of a cooperative operation for devices connected to a LAN (50). A control unit (11) in an information processing device (10) connected to the LAN provides to a display, in accordance with selection of devices (10, 20, 30, 40) by a user, data representative of cooperative operations executable by using the selected devices. The control unit provides, to the display, data representative of cooperative operations executed in the past and recorded in a memory (12). The control unit provides to the selected devices, via the LAN, a necessary command to execute one of the executable cooperative operations that is selected by the user. The control unit provides, to the display, data representative of a device which is connected to the LAN and substitutable for a necessary device.

Abstract: In the synchronous motor controlling apparatus and method of the invention, a current is detected and subjected to coordinate transformation onto &ggr;-&dgr; axis assumed for the rotor. A correction term is obtained on the basis of the derived current and an arbitrarily given correction current instruction. A &ggr;-&dgr; axis voltage instruction is computed by adding a value obtained by multiplying the correction term by a proper gain to a voltage equation in a steady state of the synchronous motor. Consequently, a control method of small computational load, which does not require gain adjustment according to the inertia of a motor load, can be attained.

Abstract: A conventional synchronous motor controlling method estimates the speed and performs a vector control, so that the gain of a speed control system has to be adjusted according to the inertia of a load connected to the motor shaft, and computation is also relatively complicated.

Abstract: Disc storage case (1) for storing a plurality of discs (20) comprises a case body (2) having a cylindrical protuberance (4), the outer diameter 4a of which is encompassed by an elastic member (5), and a protrusion (10) that freely enters and exits the inner diameter (4a) of the protuberance (4).