摘要:
A memory storing AV data for playing back encrypted video on a playback device is provided. The AV data includes a system stream file including encrypted video information, and a management information file. The system stream file includes a first segment in which is repeated a first data unit that can be individually decrypted using a first decryption key, and has a second data unit of the same data size as the first data unit but cannot be decrypted by the first decryption key. The system stream file also includes a second segment which can all be decrypted using a second decryption key that the playback device has in common with another playback device. The management information file has a time map in which are correlated I-picture serving as random access point, and a presentation clock time of the I-picture. The I-picture is multiplexed in the second segment.
摘要:
In a playback method of a playback device that plays a system stream file including encrypted video information, the system stream file includes a first segment in which is repeated a first data unit that can be decrypted using a first decryption key that the playback device has and a second data unit of the same data size as the first data unit but cannot be decrypted by the first decryption key, and a second segment which can all be decrypted using a second decryption key that differs from the first decryption key. The playback method reads the system stream file, and performs conversion processing to convert the system stream file that has been read out into a post-conversion system stream, in which the second data unit in the first segment in the system stream file that has been read out is replaced with a plurality of continuous invalid packets, and outs the post-conversion system stream.
摘要:
A device comprises a data storage media storing data content and a digital signature. At least a portion of the digital signature is encrypted on the data storage media. The device also includes a removable control circuitry including a unique key. If the unique key corresponds to the encrypted portion of the digital signature, the removable control circuitry allows access to the data content. If the unique key does not correspond to the encrypted portion of the digital signature, the removable control circuitry prevents access to the data content. Embodiments of the invention may be useful to prevent a user from accessing the data content without the original control circuitry used to write the data content. For example, embodiments of the invention may prevent a user from using a different control circuitry that would readily allow unauthorized copying and distribution of the data content.
摘要:
A recording device configured to store content data in an encrypted manner, the recording device comprises a memory unit which stores various data, and a controller which controls the memory unit. The controller possesses a controller key and unique identification information, and is configured to generate a controller-unique key unique for each controller in accordance with the controller key and the identification information. The memory unit stores an MKB generated by encrypting a medium key with a device key set that is a collection of a plurality of device keys, an encrypted device key set generated by encrypting the device key set with the controller-unique key, and a device-key-set index which uniquely identifies the device key set.
摘要:
An information processing device includes: a local memory unit storing data including encrypted content; a memory storing data including key information to be used in a process of reproducing the encrypted content; and a data processing unit selectively reproducing encrypted content stored in a disk or the local memory unit, wherein the data processing unit reads a medium ID from the disk when the content to be reproduced is stored in the disk and reads a medium ID from the memory when the content to be reproduced is stored in the local memory unit.
摘要:
To protect device keys, an optical media recording device capable of performing AACS encryption on data does not have any device keys, and the optical media recording device performs AACS encryption by activating recording software stored in a memory the optical media recording device, and utilizing a pre-calculated media key stored in the memory of the optical media recording device to perform AACS encryption on the data.
摘要:
Systems and methods for performing secure playback of media content are described. One embodiment, among others, is a method for performing secure playback of video in a hardware protection module. The method comprises receiving media content from a media player comprising video data, audio data, and navigation data. The method further comprises receiving digital rights management (DRM) information relating to the media content, removing a portion of the video data from the media content, forwarding the audio data, navigation data, and a remaining portion of the video data to the media player for decoding, and decoding, in the hardware protection module, the portion of the video data.
摘要:
The present invention relates to accessing content stored on a storage device and protecting the content with a digital rights management (DRM) scheme. The storage device may be a disk drive, or network attached storage. The storage device can perform cryptographic operations and provide a hardware root of trust. The DRM employs a binding key, a content key, and an access key. The binding key binds the content to the storage device and is based on a key concealed on the storage device. The binding key itself is not stored anywhere on the storage device. The content key is a key assigned to the content. The access key is determined based on a cryptographic combination of the content key and binding key. In one embodiment, the content is encrypted based on the access key and stored in encrypted form in the storage device.
摘要:
A configuration is provided for a process in which appropriate content code corresponding to apparatuses and applications of various model types and versions is selected to be performed. In a configuration in which content code recorded on an information recording medium is obtained, and processing, such as a security check in accordance with the content code, conversion of the content data, and embedding of player information into the content, is performed, at least a portion of the content code is set as encrypted data, and as an encryption key, a node key set so as to correspond to a node of a key tree having a hierarchical structure is used.
摘要:
A method of distributing a key to encrypt data for storing on a removable data storage item in a data transfer device library, the library comprising a controller having a key associated therewith and being connected to a plurality of data transfer devices each being operable to transfer data to a removable data storage item and having a key store, the method comprising: providing the key for the library to the controller; the controller providing the key to the key store of each data transfer device connected to the controller. A data transfer device library is also disclosed.