Sony Corporation

Hiroshi Kuno

Takamichi Hayashi

Yoshiyuki Kobayashi

Munetake Ebihara

Kenjiro Ueda

Koji Yoshimura

Katsumi Muramatsu

Motoki Kato

Takumi Okaue

Hideaki Okubo

Mitsuru Tanabe

Takeshi Ishimoto

Jun Tashiro

Shunichi Soma

Toshiya Hamada

Kazuo Yamamoto

Ichiro Sato

Motohiko Nagano

Tamotsu Ishii

Keiko Saeki

Daisaku Hayashi

Shuichi Makishima

According to a first aspect of the present disclosure, there is provided an information storage device including a storage unit that stores encrypted content, usage control information of the encrypted content, and a revocation list in which revocation information of a content reproduction device is recorded, and a data processing unit that determines whether content reproduction of an information processing device which performs decoding of the encrypted content is permitted. The data processing unit acquires an entry identifier which is designation information for a registration entry of the revocation list recorded in the usage control information, executes an identifier registration determination process for determining whether an identifier of the information processing device which performs decoding of the encrypted content is registered in the entry of the revocation list identified according to the acquired entry identifier, and determines whether a subkey which is a generation key for a title key applied to the decoding of the encrypted content is to be provided to the information processing device based on a result of the identifier registration determination process.

Information processing to set usage permission in content

An information processing apparatus includes a data processing unit which executes processing for decoding and reproducing encrypted content. The data processing unit executes processing for determining whether the content can be reproduced by applying an encrypted content signature file. The encrypted content signature file stores information on issue date of the encrypted content signature file and an encrypted content signature issuer certificate with a public key of an encrypted content signature issuer. In determining whether the content can be reproduced, the data processing unit compares expiration date of the encrypted content signature issuer certificate with the information on issue date of the encrypted content signature file, and does not perform processing for decoding and reproducing the encrypted content when the expiration date is before the issue date, and performs the processing for decoding and reproducing the encrypted content only when the expiration date is not before the issue date.

Information processing apparatus and information processing method for decoding, reproducing and providing encrypted content

An information processing device includes: a data processing unit that executes a process of reproducing content recorded in a medium; and a memory storing a content revocation list in which an identifier (ID) of revoked content is recorded, wherein the data processing unit compares a minimum allowable version of a content revocation list recorded in a token which is management data corresponding to content recorded in the medium with a version of a content revocation list acquired from the memory, and when the version of the content revocation list acquired from the memory is an old version lower than the minimum allowable version of the content revocation list recorded in the token, the data processing unit halts determination on revocation of content based on the content revocation list acquired from the memory and reproduction of content.

Information processing device and information processing method

To realize a configuration to output content to a medium and to use the content stored in the medium under control of the use of content. A content-output-device outputs an encrypted content and an encryption key to be applied to the using process to the medium, and a management server generates a media ID verification value based on a media ID that is an identifier of the medium and transmits the value to the medium. The medium stores the encrypted content, the encryption key, and the media ID verification value in a storage unit. A reproduction device loads the medium and calculates a verification value based on the media ID acquired from the medium, and executes a reproducing process of the encrypted content stored in the medium by data processing to which the encryption key is applied on condition that a matching process performed between the verification value and the media ID verification value stored in the medium is established.

Protection of content based on encryption

An information processing device including: a data processing unit that generates an encryption key of content; and a communication unit that transmits an encryption key generated by the data processing unit, wherein the data processing unit generates, as the encryption key, individual keys that are different for each new content recording processing on a recording medium in a content recording device, and transmits the individual keys through the communication unit.

Information processing device, information processing method, and program

An information storage device including one or more processors configured to store an encrypted content and to control access of an external device to the information storage device is provided. The one or more processors are further configured to store a converted title key obtained by converting a title key which is an encryption key to be applied to decryption of the encrypted content, and a user token obtained by converting binding secret information to be applied to calculate the title key from the converted title key. The one or more processors are further configured to allow the external device having a confirmed access right to the information storage device to read out the user token.

Information processing device, information storage device, server, information processing system, information processing method and medium for reproduction of encrypted content

There is provided a device and a method for preventing using of illegitimate content or manufacturing of the illegitimate media that uses illegitimate media. In a system that has an information storage device, a license management apparatus that generates a media key set (MKS) that is stored in the information storage device, and a content provision apparatus, at the time of manufacturing of the information storage device, the license management apparatus compares an MKS version that is set in the MKS that is stored in the information storage device, and an allowance minimum MKS version that is recorded in a controller of the information storage device, and thus records key information stored in the MKS, in a storage unit under the condition that it is confirmed that the MKS version is equal to or greater in value than the allowance minimum MKS version.

Information storage device, information processing system, information processing method, and program

Disclosed is a structure that includes: an information processing apparatus that stores content into an information storage device such as a memory card including an access allowed block based on an access right check made on each block, and uses the content; a content usage managing server that provides content usage permission information to the information processing apparatus; and a content correspondence information providing server that provides the encryption key to be used in decrypting the encrypted content stored in the information storage device. The content usage managing server determines the block for storing the encryption key and notifies the content correspondence information providing server of a block identifier that is the identifier of the determined block, and the content correspondence information providing server performs a process to write the encryption key into the block corresponding to the received block identifier.

Information processing apparatus, information processing system, information processing method, and program

An information processing apparatus includes a data processing section for reproducing contents stored in a medium having a general purpose area in which encrypted contents and corresponding utilization controlling information are stored and a protected area including a plurality of blocks having access limitation set thereto and including a block having an encryption key for decrypting the encrypted contents stored therein. The data processing section acquires utilization controlling information corresponding to a content from the general purpose area, decides, based on the utilization controlling information, whether validity period information indicative of a content utilization permission period is to be acquired from the utilization controlling information or the encryption key storage block, acquires the validity period information based on a result of the decision and then compares the acquired validity period information and current date information to decide permission or inhibition of content reproduction.

Information processing apparatus, information processing method and program

The present invention enables execution of predetermined content usage control processing without depending on a framework of a content playback program (application). Upon content playback processing, a flag which sets information of determination as to whether or not it is necessary to refer to a management information file such as a token or a usage control information file associated with content is recorded in a content file including encrypted content to be stored in a recording medium. Upon the content playback processing, a playback apparatus acquires the content file including the encrypted content stored in the recording medium, refers to a flag recorded in the content file and determines whether or not it is necessary to refer to the management information file based on a setting of the flag. When the setting of the flag indicates that it is necessary to refer to the management information file, it is possible to select a correct management information file based on a content file identifier as a search key.

Information processing apparatus, information processing method, and program

Provided is an information storage device including a storage unit configured to store encrypted content and an encryption key to be applied to decryption of the encrypted content, wherein the storage unit stores a converted encryption key generated through an arithmetic operation of the encryption key and an electronic signature that is constituent data of an encrypted content signature file set corresponding to the encrypted content, wherein the electronic signature is an electronic signature for data that includes constituent data of the encrypted content and the encryption key, and wherein a reproduction device configured to read the encrypted content from the storage unit and execute a decryption process is able to be caused to perform acquisition of the encryption key through an arithmetic operation of applying the electronic signature to the converted encryption key.

Information processing device, information storage device, information processing system, information processing method, and program

There is provided an information processing apparatus including: a data processing unit, on which a medium as an information storage apparatus is mounted, which controls reproduction of content stored on the medium, wherein the data processing unit executes host device ID registration processing for outputting a host device ID, which is an identifier of the host device, to the medium and storing the host device ID on the medium, receives the host device ID, which is stored on the medium, from the medium after execution of the host device ID registration processing, executes connection consistency confirmation processing for executing matching processing between the received host ID and the host device ID of the host device, and executes or continues content reproduction under a condition that the matching processing has been established in the connection consistency confirmation processing, or stops the content reproduction if the matching processing has not been established.

Information processing apparatus, information storage apparatus, information processing system, and information processing method and program for controlling content use

An information processing device includes: a data processing unit that executes a process of reproducing content recorded in a medium, wherein the data processing unit acquires a token from the medium, the token being management data corresponding to content recorded in the medium, compares a server ID recorded in the acquired token with a server ID recorded in a server certificate acquired from a server from which the management data is acquired, and halts reproduction of content when the two server IDs are not identical.

The present invention provides a time setting system and method thereof that are capable of correctly setting time if a delay occurs in the transmission of time information. In the system for setting a master time outputted from a master apparatus to a slave time of a slave apparatus that counts time independently of the master apparatus, the slave apparatus has transmission section for transmitting master time request information to the master apparatus via a network and the master apparatus has an allowable range information acquisition section for acquiring allowable range information indicative of an allowable time in which the master time may be set to the slave time of the slave apparatus and transmission section for transmitting the master time and allowable range information to the slave apparatus. The slave apparatus obtains a time difference between a first slave time to be obtained before or after the transmission of master time request information and a second slave time to be obtained at reception of the master time and the allowable range information. If the allowable time is greater than the obtained time difference, the master time is set.

Time setting system and time setting method

An information storage apparatus includes a storage unit configured to store an encrypted content and an encryption key to be applied to decryption of the encrypted content, the storage unit including a protected area in which a converted encryption key is stored and to which access restrictions are set, the converted encryption key being a data item acquired through conversion of the encryption key, and a general purpose area storing the encrypted content and an encrypted content signature file set correspondingly to the encrypted content, the encrypted content signature file containing, as a recorded data item, a block identifier indicating in which of areas in the protected area storage of the converted encryption key is permitted, to permit a reproducing apparatus to execute content reproduction possibility judgment applying the block identifier, the reproducing apparatus being configured to read the encrypted content from the storage unit and execute a reproducing process.

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Kanagawa, Japan

Hiroshi Kuno