Abstract: A ring spacer interposed between plate-shaped objects above and below in a container for storing and transporting the plate-shaped objects when a plurality of plate-shaped objects is stored in an up-and-down direction includes a ring-shaped abutment portion and a control portion. An upper face and a lower face in the abutment portion have an approximately flat shape and the upper face in the abutment portion abuts against a lower face of a peripheral edge portion of the plate-shaped object. The lower face in the abutment portion abuts against an upper face of the peripheral edge portion of the plate-shaped object. The control portion includes a control portion upper face positioned to protrude further upward than the support face of the abutment portion and a control portion lower face positioned at an appropriate location in a thickness direction of the abutment portion.

Abstract: A ring spacer interposed between plate-shaped objects above and below in a container for storing and transporting the plate-shaped objects when a plurality of plate-shaped objects is stored in an up-and-down direction includes a ring-shaped abutment portion and a control portion. An upper face and a lower face in the abutment portion have an approximately flat shape and the upper face in the abutment portion abuts against a lower face of a peripheral edge portion of the plate-shaped object. The lower face in the abutment portion abuts against an upper face of the peripheral edge portion of the plate-shaped object. The control portion includes a control portion upper face positioned to protrude further upward than the support face of the abutment portion and a control portion lower face positioned at an appropriate location in a thickness direction of the abutment portion.

Abstract: According to one embodiment, a metadata processing apparatus which communicates with a server that holds metadata, the metadata processing apparatus includes a metadata update module configured to update metadata pertaining to content, a transmission module configured to transmit, to the server, content identification data for identifying the content to which the metadata updated by the metadata update module pertains, a reception module configured to receive data transmitted from the server, a determination module configured to determine, on the basis of the data received from the server by the reception module, whether it is necessary to upload the metadata updated by the metadata update module, and a notification module configured to invoke notification that presses upload of the metadata updated by the metadata update module to the server when the determination module has determined that upload is necessary.

Abstract: According to one embodiment, a metadata processing apparatus which communicates with a server that holds metadata, the metadata processing apparatus includes a metadata update module configured to update metadata pertaining to content, a transmission module configured to transmit, to the server, content identification data for identifying the content to which the metadata updated by the metadata update module pertains, a reception module configured to receive data transmitted from the server, a determination module configured to determine, on the basis of the data received from the server by the reception module, whether it is necessary to upload the metadata updated by the metadata update module, and a notification module configured to invoke notification that presses upload of the metadata updated by the metadata update module to the server when the determination module has determined that upload is necessary.

Abstract: According to one embodiment, a program search apparatus includes a communication module, a search module, and an output controller. The communication module is configured to communicate with an external apparatus via a network. The search module is configured to search for a corresponding program corresponding to a designated program designated from a program table via the network. The output controller is configured to execute control to output a search result.

Abstract: According to one embodiment of the invention, there is provided an information recording and reproducing apparatus which records information in a recording medium and reproduces information recorded in the recording medium, the information recording and reproducing apparatus includes a recording section which records in the recording medium an first encrypted encryption key aggregate where at least one encryption key for encrypting each of a plurality of pieces of information has been encrypted and registered and information encrypted using the encryption key, a necessity determining section which determines on the basis of conditions decided according to the type of the recording medium whether to record the first encrypted encryption key aggregate into the recording medium, wherein the recording section records in the recording medium the first encrypted encryption key aggregate determined to have to be recorded.

Abstract: According to one embodiment, an information transmission apparatus includes a connection module, a detector, an output module, and a transmitter. The connection module is configured to connect at least one external device. The detector is configured to detect a status of at least one content compatible with the at least one external device connected by the connection module. The output module is configured to output display information for display a connection state with at least one compatible external device compatible with the at least one content having the status, the at least one compatible external device included in the at least one external device connected by the connection module. The transmitter is configured to transmit a selected content to the at least one compatible external device displayed based on the display information.

Abstract: According to one embodiment of the invention, there is provided an information recording and reproducing apparatus which records information in a recording medium and reproduces information recorded in the recording medium, the information recording and reproducing apparatus includes a first recording section which records in the recording medium an encrypted encryption key aggregate where at least one encryption key for encrypting each of a plurality of pieces of information has been encrypted and registered and information encrypted using the encryption key, a second recording section which records encrypted first private key information used to encrypt or decrypt the encryption key into the recording medium and which, if the encrypted encryption key aggregate has not been recorded in the recording medium, records the first private key information into the recording medium only when the encrypted encryption key aggregate is recorded in the recording medium.

Abstract: According to one embodiment, an access management system such as an AACS is used to protect highly confidential information recorded in a write-once medium. To first prepare a title key file for encryption by the AACS, title keys are prepared as many as the number of rules of a usage rule file. The plurality of title keys prepared in this manner are written in the title key file. The title keys written in this title key file are appropriately used to encrypt contents, and the encrypted contents are then recorded in the write-once medium.

Abstract: According to one embodiment, an access control system such as an AACS is used to protect highly confidential data. At the time of powered-on after powered-off due to a power suspension, when a backup file of Read Write MKB exists, the generation of three key files is inspected. According to the result of the inspection, either one of the Read Write MKB and the backup file thereof is used to recover the encryption key from two of the three key files.

Abstract: According to one embodiment, an access management system such as an AACS is used to protect highly confidential information. A new key is generated at the time of starting one recording. This key is used to encrypt an object which is the object obtained by encoding the recording target according to a predetermined method or is the object of the recording target itself. When this object is divided during recording, the same key is used for the one recording processing.

Abstract: According to one embodiment of the invention, there is provided an information recording and reproducing apparatus which records information in a recording medium and reproduces information recorded in the recording medium, the information recording and reproducing apparatus includes a first recording section which records in the recording medium an encrypted encryption key aggregate where at least one encryption key for encrypting each of a plurality of pieces of information has been encrypted and registered and information encrypted using the encryption key, a second recording section which records encrypted first private key information used to encrypt or decrypt the encryption key into the recording medium and which, if the encrypted encryption key aggregate has not been recorded in the recording medium, records the first private key information into the recording medium only when the encrypted encryption key aggregate is recorded in the recording medium.

Abstract: According to one embodiment of the invention, there is provided an information recording and reproducing apparatus which records information in a recording medium and reproduces information recorded in the recording medium, the information recording and reproducing apparatus includes a recording section which records in the recording medium an first encrypted encryption key aggregate where at least one encryption key for encrypting each of a plurality of pieces of information has been encrypted and registered and information encrypted using the encryption key, a necessity determining section which determines on the basis of conditions decided according to the type of the recording medium whether to record the first encrypted encryption key aggregate into the recording medium, wherein the recording section records in the recording medium the first encrypted encryption key aggregate determined to have to be recorded.

Abstract: According to one embodiment, an access management system such as an AACS is used to protect highly confidential information. A specific content is deleted from a medium on which recorded are one or more contents or objects being encrypted using an encryption key (or Title Key) according to the AACS. When the contents are to be deleted, the contents and the encryption key will be deleted simultaneously, provided that the information medium does not record another content or another object encrypted using an encryption key which is equivalent to the encryption key used for encrypting the contents to be deleted.