摘要:
Apparatus and method for processing information may determine whether a migration condition exists by a source information processing unit executing a program. When a migration condition is determined to exist by the source information processing unit, a destination information processing unit may determine whether an instruction to be executed of the program is a predetermined instruction. The instruction to be executed is converted by an instruction emulator, when a result of a determination by the destination information processing unit is the predetermined instruction.
摘要:
Apparatus and method for processing information may determine whether a migration condition exists by a source information processing unit executing a program. When a migration condition is determined to exist by the source information processing unit, a destination information processing unit may determine whether an instruction to be executed of the program is a predetermined instruction. The instruction to be executed is converted by an instruction emulator, when a result of a determination by the destination information processing unit is the predetermined instruction.
摘要:
An enabling key block (EKB) used in an encrypted key distributing tree structure is generated by forming a simplified 2-branch or multi-branch type tree with a terminal node or leaf which is capable of decrypting on the basis of a key corresponding to a node or a leaf of the simplified tree. Further, the EKB includes a tag for indicating a position of an encrypted key in the tree. The tag not only discriminates position but also stores data for judging the presence of encrypted key data within the EKB. As such, a considerable reduction in data quantity is realized, and the decrypting process in a device is also simplified.
摘要:
A content key, an authentication key, and a program data etc. are transmitted with an enabling key block (EKB) in an encrypted key constitution of a tree structure. The EKB has a constitution in which a device as a leaf of the tree holds a leaf key and a limited node key, and a specific enabling key block (EKB) is generated and distributed to a group specified by a specific node to limit devices that can be renewed. As the devices that do not belong to the group cannot perform decryption, the security for distributing keys etc. can be secured. Thus, distribution of various kinds of keys or data is executed in an encryption key constitution of a tree structure to realize an information processing system and method enabling to distribute data efficiently and safely.
摘要:
When a player cannot play back data because a master key held by the player has a generation older than the generation of a master key having been used for recording the data, or when a recorder cannot record data because a master key held by the recorder has a generation older than the generation of a master key necessary for recording to a recording medium, the user is prompted to renew the master key for acquisition of the necessary master key, thereby enabling the data playback or data recording. The renewed master key is distributed in such a form that can be processed by a specific device via a transmission medium such as a recording medium, network, IC card, telephone line, for example, via a tree-structured distribution system.
摘要:
An information processing apparatus includes a selecting unit for selecting extraction information concerning contents to be extracted from among a plurality of contents organized in time sequence, the extraction information prepared on a per content basis for the contents to be extracted and including a feature contained in the content to be extracted, and an extraction range that is represented with respect to the position of the feature, a detecting unit for detecting, from the contents, the same feature as the feature contained in the extraction information selected by the selecting unit, and an extracting unit for extracting a predetermined content in accordance with the extraction range contained in the extraction information selected by the selecting unit if the detecting unit detects the same feature as the feature contained in the extraction information.
摘要:
An information processing apparatus includes a selecting unit for selecting extraction information concerning contents to be extracted from among a plurality of contents organized in time sequence, the extraction information prepared on a per content basis for the contents to be extracted and including a feature contained in the content to be extracted, and an extraction range that is represented with respect to the position of the feature, a detecting unit for detecting, from the contents, the same feature as the feature contained in the extraction information selected by the selecting unit, and an extracting unit for extracting a predetermined content in accordance with the extraction range contained in the extraction information selected by the selecting unit if the detecting unit detects the same feature as the feature contained in the extraction information.
摘要:
An enabling key block (EKB) used in an encrypted key distributing tree structure is generated by forming a simplified 2-branch or multi-branch type tree with a terminal node or leaf which is capable of decrypting on the basis of a key corresponding to a node or a leaf of the Simplified tree. Further, the EKB includes a tag for indicating a position of an encrypted key in the tree. The tag not only discriminates position but also stores data for judging the presence of encrypted key data within the EKB. As such, a considerable reduction in data quantity is realized, and the decrypting process in a device is also simplified.
摘要:
In a tree-structural key distribution system, renewed data of a master key and medium key are sent along with a key renewal block (KRB). KRB is such that each of devices included as leaves of a tree structure has a leaf key and restricted node key. A specific KRB can be generated for a group identified by a specific node and distributed to the group to restrict a device for which the key can be renewed. Any device not belonging to the group cannot decrypt the key, whereby the security of key distribution can be assured. Especially in a system using a generation-managed master key, a master key renewed with KRB can be distributed.
摘要:
An information processing apparatus includes a selector for selecting removal information concerning contents to be removed, the removal information prepared on a per content basis for the contents to be removed and including a value uniquely determined from data within a data range of whole or part of a content to be removed, a first range that is the data range, and a second range that is a removal range represented by the position of the first range, a detector for detecting a range at a predetermined position within the whole content, having the same range as the first range contained in the removal information selected by the selector and the same value as the value uniquely determined and contained in the removal information, and a remover for removing a predetermined content based on the second range contained in the removal information selected by the selector if the detector detects the range at the predetermined position.