Patent application number | Description | Published |
20080219442 | Information processing apparatus and method, and a program - Disclosed herein is an information processing apparatus that processes an encrypted content. The apparatus includes a control section configured to control the following processes, such as a generation process, a moving range determination process, a holding process, a copying process, and an inactivation process. Such processes are to be performed independently in a specified order as a process for achieving moving out of at least a part of the encrypted content from a moving source to a moving destination. | 09-11-2008 |
20110239004 | MEMORY DEVICE, HOST DEVICE, AND MEMORY SYSTEM - A memory device includes: a storage unit that stores public key information of a certificate authority for verifying a certificate and includes a secret area storing data of which secrecy is assured; and a control unit that controls access to the storage unit depending on reception information, wherein the reception information includes information where access control information is added to certificate information authenticated by the certificate authority, and the control unit verifies the certificate using the public key, identifies the access control information, and limits the accessible secret area in the storage unit. | 09-29-2011 |
20110258409 | MEMORY DEVICE, HOST DEVICE, AND MEMORY SYSTEM - A memory device is provided including: a storage section configured to store a content with a time limit for use; an elapsed time counting section configured to count the time limit; a battery section configured to be supplied with power from an external device accessing the time-limited content so as to be charged with power for operating the elapsed time counting section; and a control section configured to include a function of determining an expected time period during which the battery section can sustain the elapsed time counting section operating to count the time limit. | 10-20-2011 |
20110320810 | INFORMATION PROCESSING DEVICE, INFORMATION PROCESSING METHOD, AND PROGRAM - 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. | 12-29-2011 |
20110320811 | INFORMATION PROCESSING DEVICE, INFORMATION PROCESSING METHOD, AND PROGRAM - 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. | 12-29-2011 |
20110320812 | INFORMATION PROCESSING DEVICE, INFORMATION PROCESSING METHOD, AND PROGRAM - An information processing device includes: a memory having a protected area which is a data recording area in which access restriction is set; and a data processing unit that determines accessibility in response to a request for accessing the protected area from an access requesting device, wherein the data processing unit verifies a device certificate received from the access requesting device and determines accessibility to the protected area based on access control information recorded in the device certificate. | 12-29-2011 |
20120030479 | STORAGE APPARATUS, HOST APPARATUS, AND STORAGE SYSTEM - Disclosed herein is a storage apparatus including: a first storage block configured to record and hold encrypted content data and output the encrypted content data on an on-demand basis; a second storage block configured to record and hold a confidential title key; a title stream key generation block configured to generate a title stream key corresponding to a subject of encryption of the content data by use of the held confidential title key; and a communication block configured to transmit the generated title stream key with confidentiality thereof held. | 02-02-2012 |
20120045062 | INFORMATION PROCESSING DEVICE, INFORMATION PROCESSING METHOD, AND PROGRAM - 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. | 02-23-2012 |
20120047360 | INFORMATION PROCESSING DEVICE, INFORMATION PROCESSING METHOD, AND PROGRAM - An information processing device including: a data processing unit that generates content for transmitting to a client; and a communication unit that transmits the generated content of the data processing unit, wherein the data processing unit generates, based on basic encrypted content having a plurality of units that each includes a SEED that is data for encryption key generation and a block that is encrypted data that is encrypted by an encryption key generated using the SEED, each data of (a) converted encrypted content on which conversion processing to replace the SEED with dummy data or to delete the SEED is performed, and (b) encrypted SEED that is the SEED encrypted by content transmission processing or by individual keys that are different by units of users at a transmission destination, and transmits the generated converted encrypted content and encrypted SEED as data provided to the client via the communication unit. | 02-23-2012 |
20120144206 | INFORMATION PROCESSING APPARATUS, REMOVABLE STORAGE DEVICE, INFORMATION PROCESSING METHOD, AND INFORMATION PROCESSING SYSTEM - An information processing apparatus includes an encrypted authentication unit that obtains, as encrypted information, the estimated total capacity of a storage medium included in a removable storage device, which is the target of encrypted authentication, a storage use unit that obtains the total capacity of a storage medium to which data is written, and a determination unit that restricts the use by the storage use unit of the storage medium to which the data is written depending on whether the difference between the estimated total capacity and the total capacity is equal to or more than a predetermined threshold. | 06-07-2012 |
20120159196 | INFORMATION PROCESSING APPARATUS, INFORMATION PROCESSING METHOD, AND PROGRAM - A content providing system includes: a server which provides to a host apparatus a first encrypted content including an encrypted area having applied thereto a replacement key; a host apparatus which receives the first encrypted content and replacement key application area information indicating the encrypted area having applied thereto the replacement key from the server; and a data storage device which receives the replacement key from the server and an individual key set in terms of content distribution processing from the server and performs key replacement processing for changing the replacement key application area of the first encrypted content to an encrypted area by the individual key to store a second encrypted content after the key replacement processing in a data recording area. | 06-21-2012 |
20120173799 | DATA STORAGE APPARATUS, INFORMATION PROCESSING APPARATUS, INFORMATION PROCESSING METHOD, AND PROGRAM - An information storage apparatus that includes a memory unit, a first controller that reads data from the memory unit, and a second controller included in the memory unit that reads a first identification and outputs the first identification in response to an external instruction, wherein the first identification may only be read by the second controller. | 07-05-2012 |
20150046719 | INFORMATION PROCESSING DEVICE, INFORMATION PROCESSING METHOD, AND PROGRAM - 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 prates sing on a recording medium in a content recording device, and transmits the individual keys through the communication unit. | 02-12-2015 |