JP2003163656A - Contents publication control system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To limit a publication date and publication destinations for the contents of a package system medium. <P>SOLUTION: This system consists of a key delivery processing 110 for delivering a decoding key from a server 1 to a player 2, decoding processing 120 for decoding the contents by the decoding key, and content reproduction processing 130 for reproducing contents that has been decoded. The key delivery processing 110 performs the automatic connection of the Internet 3, the automatic access of domain and downloading of the decoding key in this order. The decoding processing 120 decodes the content of an animation file by using the decoding key downloaded from the server 1 by a decoding program. The content reproduction processing 130 dynamically combines files of a decoded moving image, sound, etc., and displays them on a personal computer display position by a reproducing method designated in synchronizm with the time axis of a time table by a reproduction program. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a content publication control system for controlling the publication of content by limiting the publication date and time of the content recorded on a package medium such as a CD-ROM and the publication partner.

[0002]

Due to the speeding up of communication lines, the advancement of moving image compression technology, and the significant improvement in the processing capacity of personal computers, there is a need for the distribution of video and audio such as news programs, music programs, and movie trailers. It is rising. Two mainstream content distribution / public media for distributing video and audio are a package media represented by a conventional CD-ROM and a network media represented by the Internet.

Among these, network media include a download type in which all files are once downloaded and played back, a streaming type in which files are played back while downloading, and a live type in which live images are transmitted like a concert relay. The download type has a problem that it takes too long to download a huge amount of data such as video and audio, and the streaming type and the live type have a problem that the movement of the screen is awkward. Therefore, until these problems are resolved, it is considered that the demand for packaged media continues to be extremely high.

However, in the case of network media, the contents are distributed online, so the publication date and time and the parties to be published can be freely limited. However, in the case of package media, the contents are distributed in advance to the viewers. You can't limit the public. For this reason, it has been impossible to manage the publication schedule of the contents recorded in the package media and to appropriately protect the paid contents.

Therefore, the present invention has an object to make it possible to limit the publication date and the publication partner for the contents of the package media as well as the network media.

[0006]

In order to achieve the above object, the present invention has the following constitution.

That is, according to the first aspect of the invention, in a system in which contents are distributed from a server to a player via a network, the contents are encrypted and recorded in a package-type medium, and a publication permission condition is set for each content. Then, the server is provided with a release key for releasing the encryption of the content recorded in the package-type medium, and a delivery means for selectively delivering the release key according to the disclosure permission condition. Receiving means for receiving the release key delivered by the server, reading means for reading the content recorded on the package-type medium, releasing means for releasing the encryption of the read content with the received release key, and decrypted content And a reproducing means for reproducing in a predetermined procedure,
However, it is a content publication control system that makes it possible to selectively publish content recorded in package media. The invention according to claim 2 is the content disclosure control system according to claim 1, wherein when the server delivers the release key, authentication of the other party is performed to verify the validity of the player. The invention of claim 3 is the content publication control system according to claim 1, wherein the publication permission condition is publication date and time. The invention of claim 4 is the content publication control system according to claim 1, wherein the publication permission condition is a publication partner.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a block diagram of a content publication control system embodying the present invention. The content disclosure control system is composed of a server 1 and a player 2 of a personal computer, and connects them via the Internet 3. The player 2 has a CD-ROM drive or a DVD-RO.
An external storage device 4 such as an M drive is attached.

The CD-ROM or DVD-ROM includes
Contains various programs and video files. The moving image file is encrypted with content encryption in advance, and a release key for decrypting this content encryption is placed in the server 1. Similarly, various programs may be placed on the server 1 and distributed from the server 1 to the player 2.

The content encryption is composed of a scramble key, a media key (password), etc. to be applied to the contents such as moving images and sounds. If this cannot be solved, the encoded moving images and sounds are restored or locked moving image files. Becomes inaccessible. The ciphers are multiplexed by using various kinds of content ciphers, thereby increasing the cipher strength of the contents. In addition, disclosure permission conditions such as the publication date and disclosure partner are set for each encrypted content.

Various programs include a connection program for connecting to the Internet 3 and communicating with the server 1.
It is composed of a decryption program for decrypting the content encryption and a reproduction program for reproducing the decrypted content.

FIG. 2 shows a block diagram of a content publication control system embodying the present invention. The content disclosure control system includes a key distribution process 110 for delivering a release key from the server 1 to the player 2, a decryption process 120 for decrypting the content encryption with the release key, and a content reproduction process 130 for reproducing the decrypted content. Constitute.

The key distribution process 110 is performed in the order of automatic connection of the Internet 3, automatic domain access, and download of a release key. The automatic connection of the Internet 3 is performed by the CD-ROM or DVD-R distributed to the external storage device 4.
When the OM is set, the built-in connection program is automatically started, and the player 2 other than the always connected environment is dial-up connected to the Internet 3. The domain automatic access automatically calls the home page of the URL specified by the connection program.

[0016] To download the release key, the release key of the server 1 is downloaded to the player 2 by performing a predetermined exchange between the server 1 and the connection program. At this time, the server 1 authenticates whether the CD-ROM or DVD-ROM set in the external storage device 4 is properly registered, and downloads the release key if it is recognized as correct. The other party authentication at this time is performed by the server 1 decrypting the data encrypted with the public key by the connection program using the private key by using the elliptic curve cryptography and verifying the data. Also,
The server 1 selects only the release key of the content satisfying the release permission condition such as the release date and the release partner and delivers it to the player 2.

In the decryption processing 120, the decryption program downloaded from the server 1 by the decryption program is used to decrypt the content encryption of the moving image file. The release key is automatically erased when the encryption is released. For this reason, unless the re-connection to the Internet 3 is made and the de-scrambling key is downloaded from the server 1, the de-scrambling cannot be performed on the player 2 side.

The content reproduction processing 130 dynamically combines files such as moving images and sounds whose decryption has been canceled by the reproduction program, and displays them on the personal computer at the specified display position and reproduction method in synchronization with the time axis of the timetable. . The moving image and sound for which the encryption is released are automatically deleted when the reproduction is finished. Therefore, the content cannot be reproduced on the player 2 side unless the connection is reconnected to the Internet 3 and the encryption is released.

The content disclosure control system of the present invention is configured as described above, and when the CD-ROM or DVD-ROM distributed to the external storage device 4 of the player 2 is set, it is automatically connected to the Internet 3 and designated. Only the release key that satisfies the publishing permission condition by accessing the created domain is downloaded from the server 1 to the player 2.
Then, the content encryption is released by the downloaded release key, and only the content satisfying the publication permission condition is reproduced.

[0019]

As described above, the content publication control system of the present invention makes it possible to selectively publish the content recorded in the package media. Therefore, according to the present invention, it is possible to specify the publication date and time of the content, so that it becomes possible to previously distribute the CD-ROM of the content such as the introduction video of the new product which should not be known before the announcement to the viewer. Also, for example, by preparing content to be published one month, two weeks before, the day before, and specifying the date and time of publication individually, effective promotion that increases the viewer's expectation is possible. It will be possible. In addition, since the content disclosure partner can be designated, it is possible to easily distribute paid content in which the content itself is a product. Further, even if a third party illegally acquires the CD-ROM, the content cannot be browsed unless it is connected to the Internet to obtain the release key, so that the confidentiality of the content recorded in the package-type medium is guaranteed.

[Brief description of drawings]

FIG. 1 is a block diagram of a content disclosure control system embodying the present invention.

FIG. 2 is a block diagram of a content disclosure control system embodying the present invention.

[Explanation of symbols]

1 server 2 players 3 Internet 4 External storage device 110 Key distribution process 120 Decryption processing 130 Content playback processing

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 5B017 AA07 BA07 BB10 CA16                 5D044 AB07 DE50 FG18 FG23 GK12                       GK17 HL02 HL11                 5J104 AA12 AA16 EA04 EA15 NA02                       PA07 PA10

Claims (4)

[Claims] 1. A system for distributing content from a server to a player via a network, wherein the content is encrypted and recorded in a package-type medium, and a publishing permission condition is set for each content, A release key for releasing the encryption of the content recorded in the packaged medium, and a delivery means for selectively delivering the release key according to the disclosure permission condition, and the release key delivered by the server to the player. Receiving means for receiving the content, a reading means for reading the content recorded on the package-type medium, a releasing means for releasing the encryption of the read content with a release key that has received the content, and reproducing the decrypted content in a predetermined procedure. It is equipped with playback means, but it is recorded on package media. Content publishing control system comprising it possible to selectively expose the Ceiling. 2. When the server delivers the release key,
The content disclosure control system according to claim 1, wherein the authenticity of the player is verified by authenticating the other party. 3. The content publication control system according to claim 1, wherein the publication permission condition is a publication date and time. 4. The content disclosure control system according to claim 1, wherein the disclosure permission condition is a disclosure partner.