Abstract: A state updating unit updates first information stored in a storage unit whenever the state of a control unit transitions from an idle state to an active state or from the active state to the idle state. A second power supply unit induces electric power from radio waves received by the antenna unit. An information acquiring unit operates after receiving the supply of electric power from the second power supply unit, acquires second information indicating whether electric power is supplied from the first power supply unit, acquires the first information from the storage unit, and transmits the acquired first and second information to the control device. A diagnosing unit diagnoses faults in the terminal device based on the first and second information transmitted from the information acquiring unit of the terminal device.

Abstract: A data processing device for playing back a digital work reduces the processing load involved in verification by using only a predetermined number of encrypted units selected randomly from multiple encrypted units constituting encrypted contents recorded on a DVD. In addition, the data processing device improves the accuracy of detecting unauthorized contents by randomly selecting a predetermined number of encrypted units every time the verification is performed.

Abstract: To aim provide a software update apparatus including an install module group composed of a plurality of install modules. Each of the install modules has a function of receiving, from an external server, a replacement protection control module to be used for updating a protection control module having a function of verifying whether a predetermined application has been tampered with. Each of the install modules simultaneously running is verified by at least another one of the install modules simultaneously running, as to whether the install module has a possibility of performing malicious operations. If any of the install modules is verified as having the possibility of performing the malicious operations, any another one of the install modules that is verified as not having the possibility revokes the any install module verified as having the possibility.

Abstract: An information processing terminal (101) includes: a storage area (206), in which general information (211) and confidential information (210) are recorded; an input/output receiving unit (201) which receives an access command to general information (211) or confidential information (210); a route information holding unit (203) in which route information is held, the route information indicating an area of activity in which access to the confidential information (210) is allowed; a current location acquisition unit (304) which acquires current location information indicating the current location of the information processing terminal (101); an access determination unit (305) which allows access to the confidential information (210) when the location of the information processing terminal (101) indicated by the current location information is in the route information; and a confidential information access unit (306) which accesses the confidential information (210) in response to the access allowance by the ac

Abstract: A content distribution system for transferring contents between transmission device and reception device. The transmission device includes: key obtaining unit that obtains, from reception device, public keys and public key identifiers; watermark embedding unit that embeds a different public key identifier, as electronic watermark, into each of contents that are identical in substance; an encryption unit that encrypts contents using public keys to generate encrypted contents; and transmission unit that transmits encrypted contents to reception device. The reception device includes: key storage unit storing public keys, public key identifiers, and a private key that makes a pair with one of the public keys; key transmission unit that transmits public keys and public key identifiers to the transmission device; content receiving unit that receives encrypted contents from transmission device; and decryption unit that obtains a content from the received encrypted contents, using the private key.

Abstract: To aim provide a software update apparatus including an install module group (130) composed of a plurality of install modules. Each of the install modules has a function of receiving, from an external server (200), a replacement protection control module (121) to be used for updating a protection control module (120) having a function of verifying whether a predetermined application has been tampered with. Each of the install modules simultaneously running is verified by at least another one of the install modules simultaneously running, as to whether the install module has a possibility of performing malicious operations. If any of the install modules is verified as having the possibility of performing the malicious operations, any another one of the install modules that is verified as not having the possibility revokes the any install module verified as having the possibility.

Abstract: The present invention provides an apparatus for correctly controlling content recorded on an optical disc. An apparatus 600 for using content recorded on an optical disc 601, wherein the optical disc 601 includes a control information area 602 composed of partial areas 603a-603n, each being for recording control information indicating that use of the content is not permitted, the apparatus 600 comprises: a position information holding unit 612 holding therein position information indicating one of the partial areas 603a-603n that is allocated for the apparatus 600 to record the control information; a reading unit 613 reading information within the control information area 602; a judgment unit 614 judging whether use of the content is permitted, with use of the information read by the reading unit 613 and the position information; and a usage control unit 615 using the content when use of the content is judged to be permitted.

Abstract: A malicious-module identification device identifies and deactivates a malicious module operating in an information processing device connected thereto via a network. The malicious-module identification device is provided with a reception unit for receiving results of tampering detection from a plurality of modules for detecting tampering, and a determination unit for assuming that a module among the plurality of modules is a normal module, determining, based on the assumption, whether a contradiction occurs in the received results of tampering detection and identifying the module assumed to be a normal module as a malicious module when determining that a contradiction occurs. A deactivation unit outputs an instruction to deactivate the module identified as the malicious module.

Abstract: An update server acquires, from an apparatus, a result of verifications relating to tampering of a protection control module and each of install modules included in an install module group. The update server determines a processing procedure of the apparatus depending on the acquired result of the verifications. Specifically, if it is judged that the protection control module and each of the install modules is unauthentic, then the update server transmits, to the apparatus, an instruction to perform updating of the unauthentic protection control module in preference to a revocation of the unauthentic install module.

Abstract: Provided is an information security apparatus that has enhanced stability and confidentiality of a hash key. The information security apparatus includes an information generating PUF unit that has tamper resistance set, using physical characteristics, so as to output a preset hash key, a partial error-correction information storage unit that stores partial error-correction information, an error correcting PUF unit that has tamper-resistance set, using physical characteristics, so as to output error-correcting PUF information, an error-correction information generating unit that generates error-correction information using partial correction information and the error-correcting PUF information, and an error correcting unit that corrects an error for the hash key outputted from the information generating PUF unit and outputs an error-corrected hash key.

Abstract: An encryption apparatus prevents plaintext data from leaking even if accumulated data is analyzed, while preventing the size of encrypted data from increasing. The encryption apparatus encrypts a data piece that is smaller than a unit length and stores management information indicating a used area within an encryption area defined based on the unit length. The used area is an area already used for encryption. When encrypting a new data piece that is smaller than the unit length, the encryption apparatus generates encrypted data by adding the new data piece to an unused area within the encryption area with reference to the management information. The unused area is an area not yet used for encryption. The encryption apparatus updates the management information to include an area for the new data piece into the used area, after generating the encrypted data.

Abstract: Provided is a software update apparatus including an install module group (130) composed of a plurality of install modules. Each of the install modules receives, from an external server (200), a replacement protection control module (121) for updating a protection control module (120) having a function of verifying whether a predetermined application has been tampered with. Each of the install modules simultaneously running is verified, by at least another one of the install modules simultaneously running, as to whether the install module has a possibility of performing malicious operations.

Abstract: The management-apparatus card capable of being attached to a management apparatus receives, from the measuring apparatus, first unique information indicating the measuring apparatus, and identification information indentifying a user of the measuring apparatus; stores second unique information indicating the management-apparatus card; generates a decryption key corresponding to an encryption key, using the first unique information, the second unique information, and the identification information; stores the generated decryption key; receives encrypted vital sign data from the measuring apparatus; decrypts the received vital sign data using the stored decryption key; and obtains the decrypted vital sign data.

Abstract: An authenticator apparatus which makes it difficult for an unauthorized user to masquerade and enhances safety includes an authenticating information holding unit (102) previously stores characteristic information indicating an input and output characteristic involving an environment change of an authentic authenticatee apparatus entitled to be authentic, an authenticating information transmitting unit (107) which transmits authenticating information to a portable medium (2), a response information receiving unit (108) which receives response information outputted from the portable medium (2) in response to an input of the authenticating information, an environment selecting unit (105) which identifies an environment of the portable medium (2), and a response information confirming unit (109) which determines whether or not the authenticating information and the response information satisfy the input and output characteristic indicated in the characteristic information stored in the authenticating information

Abstract: A signature generating device generating digital signature data for certifying authenticity of information of a person, and obfuscating the information. The signature generating device includes a storage unit storing attribute information concerning the person and a private key corresponding to the attribute information, an obfuscated information generating unit selecting one or more pieces of dummy information in relation to the attribute information, and generating the obfuscated information including the attribute information and the dummy information; and a public key obtaining unit obtaining a public key corresponding to the attribute information and public keys respectively corresponding to the dummy information.

Abstract: To provide a playback device that plays back a content recorded in an optical disc in conjunction with execution of an application supplied by a server. The playback device includes a disc region code detection unit operable to detect a region code from the optical disc; an application region code estimation unit operable to estimate a region code assigned to the application based on an address of the server; a restriction unit operable, if a region code assigned to the playback device, the region code detected from the optical disc, and the estimated region code assigned to the application do not match each other, to restrict the playback of the content in conjunction with the execution of the application.

Abstract: In order to allow a user to backup data, a backup system is used to transfer data from an information terminal to a backup device via a relay device. The information terminal includes a storing unit storing the data to be backed up, and includes a communication unit transmitting the data to the relay device and transferring condition information indicating a condition to be satisfied by the relay device. Further, the relay device includes (i) a storing unit storing information relating to transfer destination devices, (ii) a receiving unit receiving the data and the transfer condition information, and (iii) a transfer control unit selecting a transfer destination device that satisfies the condition indicated by the transfer condition information, and controlling transfer of the received data in accordance with the selection. The backup device includes a receiving unit receiving the data transferred by the relay device, and a storing unit storing the received data.

Abstract: A data processing device for playing back a digital work reduces the processing load involved in verification by using only a predetermined number of encrypted units selected randomly from multiple encrypted units constituting encrypted contents recorded on a DVD. In addition, the data processing device improves the accuracy of detecting unauthorized contents by randomly selecting a predetermined number of encrypted units every time the verification is performed.

Abstract: To aim to provide an information security device capable of reducing a period necessary for performing a power operation used for secret communication or authentication. The information security device performs secret communication or authentication by calculating an exponentiation X^d based on target data X and a secret value d using the window method. In the process of calculating the exponentiation X^d, immediately after square of a random value R acquired for multiplication is repeatedly performed a predetermined number of times, for example 256 times, a result of square of the random value R is cancelled using a cancellation value S (=R^(?2^256)). This makes it unnecessary to perform cancellation processing that has been conventionally performed.

Abstract: A data processing device for playing back a digital work reduces the processing load involved in verification by using only a predetermined number of encrypted units selected randomly from multiple encrypted units constituting encrypted contents recorded on a DVD. In addition, the data processing device improves the accuracy of detecting unauthorized contents by randomly selecting a predetermined number of encrypted units every time the verification is performed.