Abstract: A problem to be solved is that a conventional device is not equipped with a unit that enables efficient circuit update taking into consideration an unconfigured area in the reconfigurable circuit in the device. A data using device 101 of the present invention transmits, to a design data generation apparatus 102, device information relating to functions and structures of circuits included in the data using device 101, and receives design data generated by the design data generation apparatus 102. The data using device 101 updates the function thereof based on the received design data. With this structure, the present invention can provide the data using device 101 and the design data generation apparatus 102 that are capable of managing the configuration of the circuits in the data using device 101, and acquiring properly the data to update the function thereof.

Abstract: A source generates a medium key (KM) and a media secret table including a plurality of entries, each entry including (KM) encrypted by a public key (PU-PD) of a plurality of devices, obtains the medium ID of a medium therefrom, generates a content key (KD) for a piece of content, encrypts the content with (KD) to result in (KD(content)), encrypts (KD) with (KM) to result in (KM(KD)), generates a package for the content including (KD(content)), (KM(KD)), the medium ID, and a signature based on at least the medium ID and verifiable with (KM), and copies the generated package and the media secret table to the medium. Thus, a device with the medium and a private key (PR-PD) corresponding to an entry of the media secret table can access and render the content.

Abstract: Apparatuses are classified into a plurality of categories, and based on a media key and device key data held by apparatuses belonging to the respective categories, revocation data intended for revoking the device key held by a specific apparatus of the respective categories is generated for the respective categories, and recorded on a recording medium.

Abstract: An unauthorized apparatus detection device detecting clones of a playback device. In a management server, a reception processing unit acquires a user terminal identifier and a first random number of a user terminal, judges whether a second management server random number, which is stored in a storage unit in correspondence with the user terminal identifier, matches the first user terminal random number. If the two fail to match, a display unit displays a message indicating that a clone exists. If the two match, a terminal information generation unit generates a new random number, and writes the generated random number as the second random number in the storage unit. A transmission processing unit transmits the generated random number to the user terminal via a transmission/reception unit and the user terminal updates the first user terminal random number to the generated random number.

Abstract: Provided is a new-type recordable DVD medium characterized in having medium characteristics not defined in the DVD-R standards and-having compatibility with the DVD-ROM standards. Since information on the new-type recordable DVD medium can be played back by an existing player, even when content data protected by CSS (Content Scrambling System) is recorded on the new-type recordable DVD medium, the recordable DVD medium can be used for content distribution service using a kiosk terminal.

Abstract: To provide a highly user-friendly content moving device which prevents unauthorized copying of content and, when content that has been irreversibly converted and moved to a recording medium is moved back to a move source, can use the content in its form before irreversible conversion. A partial information extraction unit extracts, from content stored on a content storage unit, partial data necessary for playback of the content, and a write/read unit writes the partial data to a partial information storage unit and overwrites a portion of the content corresponding to the partial data with different data, while a conversion unit transcodes the content and writes the transcoded content and the partial data to the recording medium.

Abstract: A copyright protection system includes a recording device and a reproduction device. The recording device writes encrypted content, an encrypted content key for decrypting the encrypted content, and license information on a recording medium on which a unique media number has been recorded in an unrewritable state. The license information is generated using both the media number and the encrypted content key, and therefore reflects both values. The reproduction device reads the media number, the encrypted content key, and the license information from the recording medium, and judges whether the license information reflects both the media number and the encrypted content key. The reproduction device decrypts the encrypted content key, and decrypts the encrypted content using the content key only if the license information reflects both values. Thus, the copyright protection system allows only original recording media to be reproduced, and prohibits reproduction of copy recording media.

Abstract: An executing device for conducting playback is high during the playback of contents. The executing device is equipped with a highly efficient processor and reduces the processing load involved in verification by using, for the verification, only a predetermined number of encrypted units selected randomly from multiple encrypted units constituting encrypted contents recorded on a DVD. In addition, the executing device is capable of improving the accuracy of detecting unauthorized contents by randomly selecting a predetermined number of encrypted units every time the verification is performed.

Abstract: An information processing apparatus is provided with a reconfigurable unit (101) in which a circuit can be reconfigured. The provision of a generation unit (103) enables the generation of design data of a circuit configured by the reconfigurable unit (101), and enables a reduction in the amount of design data to be held by a design data storage unit (102).

Abstract: When a plurality of types of copyright information are detected on a disk or the like, a content playback device and method can appropriately control playback of content in accordance with the copyright information. As the content playback device, a digital watermark detection device attempts to detect watermark information in blocks that make up the content, and a result storage subunit (401) stores result information constituted from detected watermark information and frequency information indicating how often the watermarks appear. Each time watermark information is detected in one of the blocks, a comparison subunit (402) compares the detected watermark information to the watermark information in the result information, and judges whether updating the result information is necessary with reference to a predetermined condition. An update subunit (403) performs an update, and a control unit (307) performs a playback restriction of the content with use of the result information.

Abstract: A design data storage unit stores a plurality of pieces of design data. A judgment unit 203 judges whether a circuit for decrypting an encrypted content received from a content server 10 is realized in a reconfigurable unit 208, and judges whether a piece of the design data for realizing the circuit for decrypting the encrypted content is held. If the desired circuit is not realized in the reconfigurable unit 208 and the desired piece of the design data is not held, the desired piece of the design data is acquired from a design data server 30 via a network.

Abstract: An encryption apparatus 100a including: a CRL storage unit 111 storing a CRL; a device key ring storage unit 112 storing a device key KD_A specific to each copyright protection module 210a used by a decryption apparatus 200a; a content key storage unit 113 storing a content key Kc that is a secret key for encrypting a content; a hashing function processing unit 114 calculating a hash value of the CRL stored in the CRL storage unit 111 according to a hashing function; and an Ex-OR unit 115 obtaining an exclusive OR value between the hash value and the device key KD_A. The encryption apparatus also includes an Enc unit 116 encrypting the content key Kc using an output value from the Ex-OR unit, and storing the hash value, the encrypted content key and the encrypted content in a DVD2a.

Abstract: Conventionally, before reading content from a recording medium, a drive device and a playback device that plays back content perform device authentication, in order to verify whether the playback device is authorized or not. Once the playback device has been verified as authorized, the playback device is permitted to read any content stored on the recording medium. In view of this, a reading device is provided that limits a type of content acquirable by the playback device by permitting the playback device to read content which satisfies a specific condition and prohibiting the playback device to read other content.

Abstract: The present invention provides an apparatus for securely acquiring a circuit configuration information set corresponding to a new cryptosystem without increasing the number of reconfigurable circuits. A content playback apparatus 100 includes an FPGA 122 that is reconfigurable. The content playback apparatus 100 stores a decryption circuit program that shows the structure of a decryption circuit that executes decryption in accordance with a prescribed cryptosystem. The FPGA is reconfigured in accordance with the program to configure the decryption circuit. The playback apparatus 100 acquires, from outside, an encrypted file that has been generated by encrypting a file including a decryption circuit program corresponding to the new cryptosystem in accordance with the prescribed cryptosystem, and decrypts the encrypted file by the decryption circuit.

Abstract: To provide a backup management device that deletes a content so as to be restorable in the future while protecting a copyright of the content, in a case where there exists a backup of the content. In an HD recorder 100, a first information storage unit 102 stores a content, a second information storage unit 103 stores a backup of the content, a secure storage unit 104 stores a hash value of the content. If receiving an instruction to delete the content so as to be restorable, a control unit 113 deletes the content from the first information storage unit 102. When the content is played back, an encryption processing unit 109 applies a calculation to the content to generate detection information, and the control unit 113 compares the hash value with the detection information to judge whether the content has been tampered.

Abstract: A group management device provides with a content a device included in a group managed by the group management device. The group management device includes a storage unit that stores a total number of remote device that the group management device currently registers, a maximum number of remote devices that the group management device is permitted to register, a total number of local device that the group management device currently registers, and a maximum number of local devices that the group management device is permitted to register. The group management device also includes a judging unit that judges whether the total number of the remote device exceeds the maximum number of the remote devices when it is judged that the one device is the remote device. The judging unit judges whether the total number of the local device exceeds the maximum number of the local devices when it is judged that the one device is the local device.

Abstract: A multilayer wiring board includes a substrate and even numbered wiring patterns. The substrate is made of an insulating material. Each of the even numbered wiring patterns is made of a conductive material, and the wiring patterns are laminated onto one another in a lamination direction via the substrate. One of the wiring patterns has a generally equivalent volume to that of a corresponding one of the wiring patterns. Here, the one of the wiring patterns is located on one plane symmetrical to a corresponding plane, on which the corresponding one of the wiring patterns is located, relative to a central position of the wiring patterns in the lamination direction.

Abstract: To provide a terminal device with which, even if content that has undergone conversion is moved to another device, the content before the conversion can be used when moving the content from the device which is a move destination of the content back to a move source of the content. The terminal device stores the content in advance, applies an irreversible conversion which causes a decrease in quality to the content to generate converted content, and writes the converted content to a storage medium. The terminal device encrypts a block in the content using an encryption key to generate an encrypted block, replaces the block in the content with the encrypted block, and writes the encryption key to the storage medium.

Abstract: A group formation/management system rigidly sets a group range, allows contents to be used freely among member devices in the group, and includes one or more registered member devices for holding common secret information unique to the group, a new member device for transmitting a request for registration in the group and receiving and holding common secret information, and a group management device for receiving the registration request from the new member device and, when the number of registered member devices is less than the maximum number of registerable member devices, outputting the common secret information to the new member device. Furthermore, because member devices are authenticated using the common secret information when contents are to be used, and contents are only delivered if the authentication is successful, member devices that do not hold the common secret information (i.e. unregistered member devices) can be prevented from using contents.

Abstract: A system structured from a management device, a content key distribution device and a plurality of terminals suppresses the data volume of a terminal revocation list (TRL). The management device generates and transmits a TRL formed from data that expresses terminal IDs of all terminals to be invalidated, by only a value and a position of a common bit string in the IDs, to the content key distribution device. Each terminal holds a terminal ID that includes a manufacturer ID and a serial number, and requests the distribution of a content key by sending the terminal ID to the content key distribution device. The content key distribution device refers to the TRL, judges whether the terminal ID transmitted from the terminal is that of an invalidated terminal, and if negative, encrypts and transmits the content key to the terminal.