Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Taihei Yugawa

Teruto Hirota

Masayuki Kozuka

Makoto Tatebayashi

Masataka Minami

Hideki Matsushima

Shunji Harada

Osamu Shibata

Yoshiyuki Saito

Yasushi Uesaka

Masaya Miyazaki

Kenji Tagawa

Toshihiko Otake

Tsutomu Sekibe

Mitsuhiro Inoue

Masanori Nakanishi

Hideaki Harumoto

Kunihiko Sakoda

Toshiyuki Ochiai

A semiconductor memory card comprising a control IC, a flash memory, and a ROM. The ROMholds information such as a medium IDunique to the semiconductor memory card. The flash memoryincludes an authentication memoryand a non-authentication memory. The authentication memorycan be accessed only by external devices which have been affirmatively authenticated. The non-authentication memorycan be accessed by external devices whether the external devices have been affirmatively authenticated or not. The control ICincludes control unitsand, an authentication unitand the like. The control unitsandcontrol accesses to the authentication memoryand the non-authentication memory, respectively. The authentication unitexecutes a mutual authentication with an external device.

Semiconductor memory card and data reading apparatus, and data reading/reproducing apparatus

A semiconductor memory card comprising a control IC, a flash memory, and a ROM. The ROMholds information such as a medium IDunique to the semiconductor memory card. The flash memoryincludes an authentication memoryand a non-authentication memory. The authentication memorycan be accessed only by external devices which have been affirmatively authenticated. The non-authentication memorycan be accessed by external devices whether or not the external devices have been affirmatively authenticated or not. The control ICincludes control unitsand, an authentication unitand the like. The control unitsandcontrol accesses to the authentication memoryand the non-authentication memory, respectively. The authentication unitexecutes a mutual authentication with an external device.

A distribution serverdistributes a content via a network, and a KIOSK terminalreceives the content via the network and records the content in an SD memory cardA customer devicereceives a content via the SD memory cardchecks out the content and records a copy on a recording medium. SD-Audio playerstoreceive a copy of the content and play back the copy. Here, the KIOSK terminalrecords a Usage Rule that certifies the right to control recording of content on the SD memory cardMove Control Information showing the number of times that moving of rights is permitted is set in the Usage Rule.

Distribution system, semiconductor memory card, receiving apparatus, computer-readable recording medium and receiving method

A device and method for encrypting content in an encryption device including a content-key storage section is disclosed. The method includes generating a content-key used for encrypting content based on random numbers and storing the generated content-key in the content-key storage section, encrypting the content-key used for encrypting the content so as to obtain an encrypted content-key and outputting the encrypted content-key to outside of the encryption device, determining whether or not a value of the content-key storage section in its initial state and a current value of the content-key storage section are different, and when it is determined that the value of the content-key storage section in its initial state and the current value of the content-key storage section are different, encrypting the content using the current value of the content-key storage section as a content-key so as to obtain a second output data and output the second output data to outside of the encryption device, wherein, for the determination step, a register stores a value of the content-key storage section at the time that said register receives a Power On Reset (POR) signal, and wherein the POR signal is a signal which pulses only once immediately after power-on or immediately after reset, so that the content-key storage section is in an initial state immediately after a corresponding power-on or reset of the encryption device.

Encryption device and method

An authentication communication system includes an storage medium having an area for storing digital information and an access device for reading/writing digital information from/into the area. The access device authenticates whether the storage medium is authorized according to a challenge-response authentication protocol in which scrambled access information generated by scrambling the access information which shows the area is used. The storage medium authenticates whether the access device is authorized. When the access device and the storage medium have authenticated each other as authorized devices, the access device reads/writes digital information from/into the area in the storage medium according to the access information separated from the scrambled access information by the access device.

Method, apparatus and system for performing authentication according to challenge-response protocol using scrambled access information

A decryption device includes: an internal-key storage section for storing an internal-key; a content-key storage section for storing a content-key; a determination section for determining whether or not a value of the content-key storage section in its initial state and a current value of the content-key storage section are different; and an operation section, the operation section including a first decrypting section which, when an encrypted content-key is input to the operation section, decrypts the encrypted content-key using the internal-key so as to obtain a content-key and stores the content-key in the content-key storage section, and a second decrypting section which, when an encrypted content is input to the operation section and the determination section determines that the value of the content-key storage section in its initial state and the current value of the content-key storage section are different, decrypts the encrypted content using the current value of the content-key storage section as a content-key so as to obtain a first output data and outputs the first output data to outside of the decryption device.

Decryption device

A distribution serverdistributes a content via a network, and a KIOSK terminalreceives the content via the network and records the content in an SD memory card. A customer devicereceives a content via the SD memory card, checks out the content and records a copy on a recording medium. SD-Audio playerstoreceive a copy of the content and play back the copy. Here, the KIOSK terminalrecords a Usage Rule that certifies the right to control recording of content on the SD memory card. Move Control Information showing the number of times that moving of rights is permitted is set in the Usage Rule.

Semiconductor memory card, data reading apparatus and data reading/reproducing apparatus

A semiconductor memory card comprising a control IC , a flash memory , and a ROM . The ROM holds information such as a medium ID unique to the semiconductor memory card. The flash memory includes an authentication memory and a non-authentication memory . The authentication memory can be accessed only by external devices which have been affirmatively authenticated. The non-authentication memory can be accessed by external devices whether the external devices have been affirmatively authenticated or not. The control IC includes control units and , an authentication unit and the like. The control units and control accesses to the authentication memory and the non-authentication memory , respectively. The authentication unit executes a mutual authentication with an external device.

Semiconductor memory card, data reading apparatus, and data reading/reproducing apparatus

Semiconductor memory card

A bus bridge apparatus that connects two system buses independent of each other to which a bus arbiter operating independently and located outside of the apparatus, has a function for serving as a master and a slave of the system buses, a base address holding means, and a bus address generating means. When, to access a slave device on a first system bus, a master device on a second system bus attempts to access the apparatus, generating offset from addresses received from the master device and combining the offset with base addresses previously stored in said base address holding means, to generate an access destination address in the slave device by using said bus address generating means, this bus bridge apparatus performs functions: (i) issuing the generated access destination address by serving as a bus master on the first system bus, to access the slave device; and (ii) performing data transfer between the master device and the slave device by serving as a slave of the master device on the second system bus. It is thus possible to realize mutual access between system buses having an independent arbitration function, without changing system design.

Bus bridge apparatus

A multimedia server has: a server section having a transfer-request accepting section for accepting a transfer request for data, a processor connected to the transfer-request accepting section, for discriminating the kind of the data and for converting the transfer request to a transfer instruction, and a bus interface; a storage device for storing data; an accelerator section having a storage-device interface for interfacing to the storage device and for retrieving data therefrom, a data transfer section for transferring the data, a processor for processing the transfer instruction issued from the server section, and for issuing a transfer instruction to have the data transferred from the storage-device interface to the data transfer section and then issuing a transfer instruction to the data transfer section to transfer the data to a requesting destination, and a bus interface; and a bus for connecting the server section with the accelerator section.

Growing community of inventors

Nara, Japan

Taihei Yugawa