摘要:
According to one embodiment, a playback apparatus includes a data read-out unit which reads out digital content from a storage medium, a copy control information update process unit which executes, if a second copy control information is defined in a file stored in the storage medium, a process of replacing a first copy control information which is embedded in the digital content that is read out of the storage medium, with the second copy control information, and a copy restriction process unit which analyzes the digital content that is output from the copy control information update process unit and executes a copy restriction process for restricting copy of the digital content, in accordance with one of the first copy control information and the second copy control information, which is embedded in the digital content.
摘要:
According to one embodiment, a firmware protection method applied to an electronic apparatus comprising a chip of a processor, wherein the processor stores external unique information and chip unique information that is assigned uniquely to the chip, the firmware protection method comprising: transferring a firmware to the electronic apparatus, the firmware subjected to an encryption and a tampering check data addition by using information that is identical with the external unique information; performing a tampering check and a decryption of the firmware by using the external unique information stored in the chip; performing an encryption of the firmware and an addition of a tampering check data to the firmware by using the chip unique information; and storing the firmware in a predetermined storage.
摘要:
According to one embodiment, since key information is written after a drive unit and host unit are assembled into a player, it is not necessary to manage, in the assembled player, the correspondence in secret key information between the drive unit and host unit. Further, in the player, even if, for example, the drive unit must be exchanged for another, encrypted key data can be shared simply by writing another key data item.
摘要:
On receiving a fast-forward playback instruction from a remote-control manager, a system controller determines whether the fast-forward playback speed is equal to or higher than a predetermined speed and whether the display screen should be divided into sections. If it determines that the display screen should be divided, the system controller determines how many sections the screen should be divided into, in accordance with the fast-forward playback speed. The system controller informs a GUI manager that the display screen should be divided into sections, the number of which has been determined.
摘要:
According to one embodiment, there is provided a playback apparatus which plays back content including an encrypted video object and an encrypted resource file, including a memory including a file cache area, a module configured to decrypt the video object, a playback process module configured to play back the decrypted video object and to output a resource file acquisition request, a module configured to determine whether the resource file is decrypted, to decrypt the resource file, to write the decrypted resource file over the encrypted resource file, to update the management information, and to send the decrypted resource file to the playback process module, and a module configured to determine whether the resource file is decrypted, to encrypt the decrypted resource file, to write the encrypted resource file over the decrypted resource file, to update the management information, and to send the encrypted resource file to the storage.
摘要:
A content reproducing apparatus includes: a disc drive device that reproduces content recorded on a recording medium; a network controller that controls data transmission between an external server specified by the content reproduced by the disc drive device; a content protection encoder/decoder unit that: (1) encodes a request to be sent to the external server via a proxy server that decodes the request; and (2) decodes a response from the external server being transmitted in response to the request decoded by the proxy server, the response being encoded by the proxy server; and a controller that controls the network controller and the content protection decode/encoder unit.
摘要:
A content playback apparatus includes an SKF selecting unit that selects one segment key file from plural segment key files recorded in a DVD media at a time of playback of a content of the sequence key section, a data selecting unit that selects each content corresponding to a segment number of each key entry registered in the selected segment key file, a moving picture data decrypting unit that decrypts the selected moving picture data by a segment key corresponding to the segment number, and a decoder that plays back the decrypted moving picture data.
摘要:
According to one embodiment, a playback apparatus includes a unit which determines whether a value of a pointer included in each of video object units read out of a storage media is larger than the total number of hash values in a content hash table stored in the storage media, a unit which computes a hash value of a video object unit selected at a given probability from among the video object units read out of the storage media and determines whether the computed hash value coincides with a hash value stored in a hash entry indicated by a pointer included in the selected video object unit, and a unit which stops playing back digital content when the value of the pointer is larger than the total number of hash values or when the computed hash value does not coincide with the hash value stored in the hash entry.
摘要:
A wireless AV station is furnished with an Internet browsing function, a TV viewing function, a TV recording and playback function and a message board function, and these multiple functions are activated by a command from a plurality of personal computers each operating as remote controllers, and/or a dedicated remote controller. A control portion executes exclusive control among multiple functions based on exclusive control data, so that concurrently available functions may be used independently by a plurality of remote controllers.
摘要:
There is disclosed a digital information system which has a digital contents protection function using WM information. The system uses the WM information during a first ripping processing to execute a first verification processing for verifying validity regarding use of contents. In this case, ID information of music contents as a ripping object is registered. The system uses the ID information to execute a second verification processing for verifying the validity regarding the use of the contents without executing the first verification processing using the WM information during the ripping processing of the music contents corresponding to the registered ID information.