Content receiving terminal, content reproducing terminal, content write-out method, and program
OwnerHisashi TSUJIinventor
Life of this patent
Estimating the term…
Abstract
During the export processing for the video content (S107), the content receiving terminal causes an encryption key for content stored in the recording medium, to be present in the content receiving terminal (S103, S105, and S106). Only when the export processing is completed or when suspension processing is normally performed, the content receiving terminal writes the content encryption key in the recording medium (S111 and S112). When the export processing is abnormally suspended, since the content encryption key is not stored in the recording medium, the other video reproducing terminals cannot reproduce the video content for which the export is incomplete.
Claims13
A content receiving terminal which encrypts content by using an encryption key and records the encrypted content in a recording media together with the encryption key, the content receiving terminal comprising:
- a request receiving unit which receives a write-out request for the content from a user;
- a content encryption key storing unit which stores the content encryption key;
- and
- a control unit which controls write-out of the content and the encryption key to the recording media including a content recording section and a content encryption key recording section , wherein
- the control unit includes a unit which can perform transmission and reception with at least the request receiving unit, the content encryption key storing unit, and the recording media, and determine whether the content encryption key is present in the content encryption key recording section, and
- the control unit further
- does not record, when the encrypted content is recorded in the content recording section of the recording media according to the write-out request for the content, the encryption key in the content encryption key recording section of the recording media but stores the encryption key in the content encryption key storing unit of the content receiving terminal,
- moves, when processing for recording the encrypted content in the content recording section of the recording media is normally temporarily suspended, the encryption key stored in the content encryption key storing unit of the content receiving terminal, to the content encryption key recording section of the recording media,
- does not move, when the processing for recording the encrypted content in the content recording section of the recording media is abnormally temporarily suspended, the encryption key stored in the content encryption key storing unit of the content receiving terminal, to the content encryption key recording section of the recording media,
- moves, when the recording of the encrypted content is continued, if the encryption key is recorded in the content encryption key recording section of the recording media, the encryption key, to the content receiving terminal, encrypts the content, and continuously records the encrypted content in the recording media, and
- moves, when the recording of the encrypted content in the recording media is completed, the encryption key, to the content key recording section of the recording media.
A write-out method for content in a content receiving terminal which encrypts content by using an encryption key and records the encrypted content in a recording media together with the encryption key,
- the write-out method comprising:
- not recording, when the encrypted content is recorded in the recording media, the encryption key, in the recording media but storing the encryption key in the content receiving terminal;
- moving, when processing for recording the encrypted content in the recording media is normally temporarily suspended, the encryption key stored in the content receiving terminal, to the recording media;
- not moving, when the processing for recording the encrypted content in the recording media is abnormally temporarily suspended, the encryption key stored in the content receiving terminal, to the recording media;
- moving, when the recording of the encrypted content is continued, if the encryption key is recorded in the recording media, the encryption key, to the content receiving terminal, encrypting the content, and continuously recording the encrypted content in the recording media;
- and
- moving, when the recording of the encrypted content in the recording media is completed, the encryption key to the recording media.
A program embodied on a non-transitory and tangible computer-readable medium, the program causing a computer to execute;
- a write-out method for content in a content receiving terminal which encrypts content by using an encryption key and records the encrypted content in a recording media together with the encryption key, the write-out method comprising:
- not recording, when the encrypted content is recorded in the recording media, the encryption key, in the recording media but storing the encryption key in the content receiving terminal;
- moving, when processing for recording the encrypted content in the recording media is normally temporarily suspended, the encryption key stored in the content receiving terminal, to the recording media;
- not moving, when the processing for recording the encrypted content in the recording media is abnormally suspended, the encryption key stored in the content receiving terminal, to the recording media;
- moving, when the recording of the encrypted content is continued, if the encryption key is recorded in the recording media, the encryption key, to the content receiving terminal, encrypting the content, and continuously recording the encrypted content in the recording media;
- and
- moving, when the recording of the encrypted content in the recording media is completed, the encryption key to the recording media.
Dependencies are inferred from the claim text.