JP2002109105A - System for distributing digital contents - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a digital contents distribution system using an electronic player for containerizing digital contents having copyright to distribute electrically to the public through a transmission path and decoding enciphered digital contents to reproduce the enciphered digital contents. SOLUTION: This digital contents distribution system uses the electronic player for providing such a distribution container preventing a user who purchases the digital contents from performing illegal action such as invasion action into the copyright in the case of selling the digital contents having the copyright electrically to the public through the transmission path, simultaneously using a distribution container for the digital contents, which can reliably seek after illegal action in case the user conducts the illegal action such as to invade the copyright, and also decoding the enciphered digital contents stored in the distribution container to be able to reproduce the enciphered digital contents so as not to leak out the digital contents to the outside.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital content distribution system, and more particularly, to a method for distributing content composed of encrypted digital information and an unauthorized use of the content composed of the digital information. The present invention relates to a digital content distribution system including a method for performing the above.

[0002]

2. Description of the Related Art In recent years, with the technological innovation related to information communication, it has become possible to easily exchange large-capacity digital data using an open computer network such as the Internet. On the Internet, exchange of application programs and digital works (digital contents) such as music, movies, images, games and the like are also actively performed. These digital contents are
Operations such as duplication, editing, transmission, etc. are easy, and quality is not degraded even if these operations are performed. Therefore, the third party who has no right
It is expected that consumers will illegally use digital contents. Therefore, from the viewpoint of protecting the right of the digital content provider, it is indispensable to implement a charging method for digital content, prevention of illegal copying, and the like, or implementation of a detection technique.

Conventionally, a system for embedding a digital watermark in digital data and managing the digital data has been proposed in order to protect the copyright of digital contents. What is a digital watermark?
This technology embeds digital content and rights information for identifying the copyright in the digital content in a form that is difficult to falsify. In the system using the digital watermark, the copyright of the content provider or the like is obtained by depositing the digital content and the right information with the service provider, and creating the content with the digital watermark by the embedded server or the like owned by the service provider. I was In recent years, a super distribution system technology has been proposed as a charging method for digital contents.

[0004] The super-distribution technology utilizes the characteristics of digital data, which is easy to copy, to permit copying of digital contents and to charge for its use. In other words, this means that digital content can be encrypted and the encrypted digital content can be obtained freely, but cannot be used unless the user purchases an encryption key for decrypting the content. Is intended to protect copyright. Conventionally, in the digital content distribution system as described above, the copyright is surely protected, and the digital content is configured so as not to be used improperly.
Means for transporting digital content circulating on the transmission path,
The delivery system could not be used effectively because there was no player to take in and play back the digital content circulating through the transmission route, and furthermore, the transmission route.

[0005]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to improve the above-mentioned conventional problems and to sell digital contents having copyright to the public electronically via a transmission path. In the event that the user who purchased the content provides a distribution container that does not allow illegal acts such as infringement of the copyright, and at the same time the user has committed illegal acts such as infringing the copyright, Use a digital content distribution container that can reliably pursue the act, decrypt the encrypted digital content stored in the distribution container, and play back the digital content so that it does not leak to the outside The present invention provides a digital content distribution system including using an electronic player. Still another object of the present invention is to provide a digital content distribution system capable of preventing unauthorized use of the digital content by using the encrypted watermark information stored in the distribution container.

[0006]

The present invention basically employs the following technical configuration to achieve the above object. That is, as a basic aspect according to the present invention, a digital content processing unit converts a content including one or more pieces of copyrighted image information or audio information into a digital content, and a watermark information is embedded by the embedding unit. By embedding watermark information in the digital content,
A step of publishing a plurality of digital contents including the watermark information via the Internet as a list; a step of publishing only a part of the digital content including the watermark information as a sample via the Internet by a preview sample supply means; But the user
If the user wishes to use any of the digital content including the watermark information, the user and the distributor of the digital content will be required to determine the digital content that the user wishes to use. A step of negotiating a contract for the digital content including usage conditions, a copyright fee, and a method of paying the copyright fee, and a process for distributing content preliminarily defining the digital content including the watermark information specified by the user. Creating a content for distribution by encrypting the digital content with a decryption key that has been decrypted using the decryption key and adding the usage condition of the digital content agreed to by the user to the encrypted digital content; container Containerize the content for distribution by creating means A step in which the fee payment confirming means determines whether the user has paid a predetermined fee for the usage conditions of the digital content; a container delivery means, and the fee payment confirming means determines whether the user has used the digital content. A step of distributing the container on the Internet when the payment of the predetermined fee for the condition is confirmed, a step of previously displaying the electronic player on the Internet by the electronic player supply means, and a step of distributing the user terminal via the Internet A step of downloading the electronic player into its own terminal, a step in which the user terminal downloads the container distributed by the distributor of the digital content to the user through the Internet into the terminal, The downloaded In the digital content the encrypted contained in the container to play using the electronic player downloaded the relevant, a part of the delivered encrypted digital content,
The encrypted digital content of the part stored in the buffer means is temporarily stored in a predetermined buffer means of the electronic player, and the part of the encrypted digital content stored in the buffer means is decrypted and reproduced using the decryption key. The other part of the encrypted digital content is overwritten and stored on the already reproduced digital content stored in the buffer means, and the decryption key is used to encrypt the other part of the encrypted digital content. Decrypting and playing back the content, repeating the same operation, and repeating the above operation until the last part of the encrypted digital content is played back. At the time of playback, the digital content to be played matches predetermined use conditions. Judging whether or not the digital content to be reproduced is matched by the management program with a predetermined use condition, the reproduction operation is permitted, and the digital content is not matched. In this case, the step of stopping the reproduction operation, the step of analyzing the use state of the digital content reproduced online via the Internet, the step of analyzing the use state of the digital content, and the step of monitoring unauthorized use are performed via the Internet. Inspecting whether or not there is digital content having predetermined image information or audio information from among digital contents circulated through the Internet; Or if digital content with audio information is found, A step of determining whether or not predetermined watermark information is embedded to determine whether or not there is unauthorized use; the copyright fee distribution means converts the copyright fee paid by the user to the copyright of the digitized content; Paying to a user via the Internet.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The digital content distribution container and the digital content reproduction electronic player according to the present invention employ the above-described technical configuration, and therefore, have a transmission path constituting a wide area network including the Internet. In a system that distributes digital content containing predetermined copyright information to users who want to use and use it online, the system prevents illegal use of the digital content and prevents copyright infringement of the digital content. By using an electronic player that can effectively avoid the digital content and reproduce the digital content without leaking it to a third party, the digital content can be transmitted through a conventional transmission path. The distribution system can be operated automatically and efficiently.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A concrete example of a digital content distribution container and an electronic player for reproducing the same according to the present invention will be described below in detail with reference to the drawings. That is,
FIG. 1 is a block diagram showing a configuration of a specific example of a digital content distribution container 40 according to the present invention. In FIG. 1, a digital content distribution container 40 that circulates in a transmission path is defined in advance. Storage means 51 for storing the digital content 30 encrypted by the encryption means, output means 52 for outputting the encrypted digital content 30 to the outside, and storage means 5
1, a container driving unit 53 that outputs the encrypted digital content 30 to the external output unit 52, a usage condition storage unit 54 that stores at least one usage condition of the digital content 10, and at least the digital content Use of the digital content including at least one of a use number counter means 56 for counting the number of uses each time it is used, a clock means 57, and a time counter means 58 for counting an elapsed time after the distribution container 40 is distributed. A status confirmation unit 59, an operation input unit 60 operated when a user uses the digital content 10, and a user
When the operation input unit 60 is operated to use the digital content 10 and the use of the digital content 10 is within the use permission condition of the digital content 10 stored in the use condition storage unit 54, By operating the container driving means 53, the digital content 10
If the use of the digital content 10 is inconsistent with the use permission condition of the digital content 10 stored in the use condition storage unit 54, the container driving unit 53 is stopped and the user And a container drive control unit 61 that functions to transmit the use state of the digital content 10 to the digital content use state analysis unit 17 separately provided via the transmission path 4. It is shown.

Here, the configuration of a specific example of a digital content distribution system using the digital content distribution container 40 according to the present invention will be briefly described. That is, the configuration of one specific example of the digital content distribution system using the digital content distribution container 40 and the electronic player 13 according to the present invention is as follows.
For example, as shown in FIG. 2, a watermark information embedding unit 1 that embeds at least one of copyright information, distributor information, and user information as watermark information in a content 10 formed from digital information, and the watermark information is embedded. Content processing means 2 for encrypting the content 20 and adding a condition relating to a usage form of the content 10 and a condition relating to a copyright fee to process the content for distribution, wherein the distributor is one or more. List publishing means 3 for publishing a list of contents in which watermark information is embedded in the digital information on the transmission path 4
Access means 6 for the user to access the list of contents via the transmission path 4 using his / her own terminal 5; if the user wants to use the contents 10 selected by himself / herself, 5 through the transmission path 4 to access the contract execution system connected to the transmission path 4, and at least between the distributor and the user, regarding the distribution of the content 10, Registration of a user name of the content, selection of usage conditions, and usage fees including a copyright fee determined by the selected usage conditions, with reference to the usage conditions, usage fees, etc. predetermined for 10 Contract execution system means 7 for determining the payment and the method of paying the fee, and in the contract execution system means 7, the distributor and the user After an agreement is reached on a contract for distribution of the content 10 with the distributor, the distributor sets a fee payment confirmation unit 8 for confirming whether the user has paid the contract fee. The selected content for distribution (already encrypted) 30
A container forming means 9 for forming a container 40 from the distributor, by the distributor, by a transfer to a bank account designated by the distributor in advance, or by electronic settlement,
When payment of the predetermined usage fee is confirmed, the distribution unit 11 that distributes the distribution container 40 to the transmission path 4 via the distribution system using the distribution system, and uses a decryption key for reproducing the container. The electronic player supply means 12 prepares and supplies the electronic player 13 to be used, and transfers the usage status of the content to the usage status analysis system 19 connected to the transmission path via the transmission path 4 and, for each content, Content usage status analysis means 17 for recording and managing usage status, content 10
Is constantly monitored globally via the transmission path 4 to determine whether or not the content is illegally used. If content similar to the content suspected of unauthorized use is found, the An operation is performed to identify whether or not the watermark information is included. If the watermark information is detected, the content of the content registration database 23 in which the content 20 in which the watermark information is embedded is registered in advance. The content unauthorized use monitoring means 22 that compares the content with the watermark information, if the user has paid the usage fee for the predetermined content 10 to the distributor, the copyright information held by the background Copyright distribution means 24 for processing a predetermined copyright fee to be paid to the copyright holder of the content based on the above. Among the means, at least the list publishing means 3, the contract execution system means 7, the container delivery system means 11, the user terminal means 5, the use state analysis system, which publishes at least the registered digital watermark-embedded digital content 20 on the transmission path 4. The means 17 and the contents unauthorized use monitoring means 22 are connected to the transmission path 4, and the contents distribution system 100 is configured such that these means are controlled by the computer 50.

The above-described content distribution system 100
Preferably includes, as the transmission path 4, a wide area communication network including the Internet. In the digital content distribution system according to the present invention,
First, when the distribution wants to sell the digital content 10 created by the copyright holder to the public, the digital content 10 is accepted from the copyright holder and the analog / digital
After the digital conversion, the digital content database 2 is transmitted via the digital content registration means 27 on the distribution side.
9 and the use condition of the digital content 10 is confirmed from the copyright holder of the digital content, and the use condition is also registered in the digital content database 29 at the same time.

The digital contents 10 used in the present invention include music information including MID system, books, photographs,
Still image information including maps, paintings, art drawings, character marks, and the like, and moving image information including videos, movies, and the like are included. Further, the digital content 10 includes a copyright mark, a privacy mark, other official marks indicating that the source of the content is correct, an authorization issued by a predetermined official organization, an authentication mark, and the like. Things are also desirable. In the digital content distribution system 100 according to the present invention, the distributor distributes a list of the distribution contents 30 as a PR activity for selling the plurality of types of digital contents 10 owned by the distributor. It is also desirable to meet the publishing means 3 and publish it on the transmission path 4 or to publish the list on a home page owned by the distributor.

On the other hand, in the digital content distribution system according to the present invention, the content (not encrypted) 20 in which the watermark information is embedded is stored in a predetermined database 23. At least a part of the specific content 20, that is, when the digital content is music, for the first 20 seconds,
It is also preferable to include a trial sample providing means 25 for publishing as a trial sample on the transmission path. In the present invention, at least a part of the content (not encrypted) 20 in which the watermark is embedded and stored in a predetermined database 23 is used as a sample sample for a predetermined recording. It is also desirable to include a trial sample providing means 26 for recording on a medium, for example, a CD, and then spreading it out to the public so that the user can play and listen to the recording medium using his / her own terminal.

The sample sample may be such that at least a part of the specific content 20 stored in the predetermined database 23 is recorded on a CD, for example, and then the CD is distributed free of charge. If the user who listened to the sample on his / her terminal or installed the CD on his / her terminal and listened to it, if he / she wants to use the specific digital content, he / she will disconnect his / her terminal. The user can access the contract execution system means 7 through the system to execute a predetermined contract act. The user is responsible for the contract execution system means 7
When you access, a menu of contract contents is displayed in order on the predetermined contract screen, so by selecting the condition that matches the user's wish from each menu, the contract between the distributor and the user is automatically It is configured to be performed.

That is, in the contract execution system means 7, as described above, each digital content 1
In 0, the author's name, the copyright fee and the distribution fee collected by the distributor are registered by the distribution digital content processing means 2 in accordance with the usage conditions of the digital content 10, so that the user From the above conditions for the selected digital content, the usage conditions, for example, the number of times of use, may be permanent use, use once or a predetermined number of times, or time may be one week,
If you select from the menu whether to use it for a period called the year, the copyright fee and the commission fee on the distribution side are automatically calculated according to that, and the total cost is displayed. In addition, the user selects an appropriate payment method from the menu and sets the payment method for the user. If the user finishes selecting the payment method for the predetermined transfer destination and agrees on the cost, a contract is automatically established at that time.

On the distribution side, on the other hand, the container creating means 9 described above combines the selected digital content for distribution 30 and the usage condition information to create a distribution container 40 in accordance with the contract conditions, and After confirming the payment of the predetermined amount from, the container 40 is delivered to the user via the transmission path 4. Further, the container 40 formed by the execution of the contract execution system means 7 according to the present invention is the delivery system 11.
A database that creates a user information management database 31, a product management database 32, and a sales management database 33 from information that is distributed to the transmission path 4 via the communication path 4 and the usage status of the content 10 is analyzed by the usage status analysis system 17. It is also desirable that a forming means 34 be further included. By using such a database, it is possible to automatically and easily obtain marketing information such as the degree of popularity of a given digital content 10 in the market and the age of the user.

On the other hand, as another aspect according to the present invention, a step of embedding at least one of copyright information, distributor information and user information as watermark information in a content 10 formed from digital information, Encrypting the embedded content and processing the content 10 for distribution by adding a condition relating to a use form of the content 10 and a condition relating to a copyright fee;
A step in which the distributor publishes a list of contents in which watermark information is embedded in one or more pieces of the digital information on the transmission path 4; Through the process of accessing the list of the contents and confirming the contents, or downloading a preview sample and previewing a part of the digital contents 10, when the user wants to use the contents 10 selected by himself / herself The user accesses the contract execution system 7 connected to the transmission path 4 via the transmission path 4 using his / her own terminal 5, and at least transmits the content between the distributor and the user. Regarding the distribution of the content 10, the use of the content 10 A step of registering a name, selecting usage conditions, determining a usage fee including a copyright fee determined by the selected usage conditions, and specifying a payment method, and the distribution in the contract execution system 7. After an agreement has been reached between the distributor and the user on a contract for distribution of the content, the distributor checks whether the user has paid the contract fee. The distribution container 40 is created based on the selected distribution content (already encrypted) 30.

The distribution container 40 according to the present invention has the above-described configuration, and the distribution content 30 which is the encrypted digital content described above.
The digital content 10 agreed by the user to
Of the content and the selected usage condition, and a driving program for the container 40 based on the usage condition and a management program for managing the usage status of the content are added to form the container 40. Things.

In the distribution container 40, every time the content 30 in the container 40 is reproduced, the reproduction program is operated by operating a management program connected to the container 40, and Via the storage device provided in the container 40, the data is transferred to the usage analysis system 17 connected to the transmission path 4 via
It is preferable that a function of transferring the content to the usage analysis system 17 connected to the transmission path 4 via the transmission path 4 and recording and managing the usage of each content is provided. The management program provided in the case where the content is about to be used in violation of the usage conditions of the content 10 pertaining to the contract conditions for the content 10, or whether the content violates the usage conditions of the content 10, In a case where the container 40 is to be used beyond the use conditions, or when it is to be used against a predetermined warning, the drive program of the container 40 may be configured to be in a stop state. preferable.

Further, the distribution container 4 according to the present invention.
0, the use condition confirmation means 59 of the digital content stores a condition for using the distribution container every time the distribution container is used, in accordance with the digital content stored in the use condition storage means 54. Usage condition determining means 5 for determining whether or not the usage permission condition is matched
5, each time the distribution container 40 is used, a counter means 56 for counting the number of times the distribution container 40 is used, and a usage count judging means 62 for comparing with a usage count condition of the digital content stored in the usage condition storage means 54; The elapsed time output by the elapsed time counting means 58 that counts the elapsed time from the time at which the delivery container was delivered to the current time via the clock means 57 is stored in the use condition storage means 54. It is desirable to include any of the elapsed use time determination means 63 for determining whether or not the usage time condition of the digital content is satisfied.

On the other hand, the container drive control means 61
When either the use count determining unit 62 or the elapsed use time determining unit 63 outputs a determination that the use of the digital content does not match the predetermined use condition of the digital content. It is also preferable that the apparatus has a function 65 for controlling the container driving means 53 to stop driving the container and notifying the user of the result.

When the user uses the digital content off-line, the container drive control means 61 separately stores at least part of the usage count information and usage time information related to the usage. A function to temporarily store the data in the provided auxiliary storage means 66, a message output function 65 to warn the user to execute the use of the digital content online next time, It is also preferable to have a function of transmitting the information stored in the preliminary storage means 66 to the digital content use status analysis means 17 when the digital content has been executed online.

On the other hand, the container drive control means 61
If the user has used the digital content offline and the warning has been issued, the specified time has elapsed, or the user has not used the digital content online after the next use or the specified number of uses, the container is not used. It is also preferable to have a function of giving a warning to the driving means 53 to stop the driving.

That is, the distribution container 4 according to the present invention.
0 is digital content storage means 51 for storing digital content 30 encrypted by predetermined encryption means, and usage condition storage for storing usage conditions contracted between the user and the distributor of the distribution container. In response to the input of the use input command information by the means 54 and the user, the use of the digital content by the user is contracted between the user and the distributor of the distribution container when outputting to the appropriate reproducing means. Judge whether or not the usage is within the usage conditions, and if the usage is determined to be within the usage conditions, output of the digital content is permitted, and the usage is determined to be outside the usage conditions. In that case, the output of the digital content is not permitted, and if the use of the digital content is permitted, It is made of a container drive control means 61 and having a function of controlling so as to transmit the broadcast digital content usage analysis means provided separately via a transmission path.

According to the present invention, the management program means 21 provided in the control means 61 provided in the distribution container 40 determines whether or not the content 10 uses the content 10 according to the contract conditions for the content 10. If the user intends to use the content 10 in violation of the conditions, or the user violates the usage conditions of the content 10 or intends to use the content 10 beyond the usage conditions, or intends to use the content 10 against a predetermined warning. In such a case, it is also desirable to have a function of stopping the driving program of the container.

Next, the distribution container 40 according to the present invention is described.
The configuration of a specific example of an electronic player used in combination with the above will be described in detail with reference to FIG. That is, as shown in FIG. 3, the electronic player 13 according to the present invention includes input means 70 connected to the digital content distribution container 40, and encrypted digital content provided in the digital content distribution container 40. Buffer means 71 for taking out a part of the digital content 30 from the storage means 51 and temporarily storing it, a decryption key storage means 72 for storing a decryption key for decrypting the encrypted digital content 30, and a buffer Decryption means 7 for decoding the part of the encrypted digital content 30 stored in the means 71 into the original digital content using the decryption key 72
3. Reproducing means 74 for reproducing the decrypted part of the digital content, and control means 7 for controlling the respective means.
5 is shown.

The operation of the electronic player 13 according to the present invention will be described in detail. The digital content storing means 51 provided in the digital content distribution container 40 stores a part of the digital content. And storing it in a buffer means 71 for temporarily storing it via the input means 70, and using the decryption key 72 for decrypting the encrypted digital content 30 in the buffer means 71. A decryption step of decoding the encrypted part of the digital content into the original digital content, a playback step of playing back the decrypted part of the digital content, and a digital content distribution container 40. The data is stored in the encrypted digital content storage means 51 provided. Step of taking out the other part of the barrel contents 30, and stored in the buffer means,
A decryption step of decoding the encrypted other digital content stored in the buffer means 71 into the original digital content using the decryption key 72; The step of reproducing the content, and thereafter, the same operation as described above is repeated from the encrypted digital content storage means 51 provided in the digital content distribution container until all the portions of the digital content have been reproduced. In the process, the storing process in the buffer means 71, the decryption process, or the reproduction process, whether the processed data is deleted by being overwritten by the respective data to be input next. Erasing by a separately provided data erasing means.

The electronic player 13 according to the present invention comprises:
It is desirable that it is arranged in the transmission path 4 so that the user can download it to his / her terminal for a fee or free of charge.

[0028]

Since the distribution container and the electronic player according to the present invention employ the above-described technical configuration, the distribution container and the electronic player are required to sell digital contents having copyright to the public electronically via a transmission path. , At the same time as providing a distribution container that prevents the user who purchased the digital content from committing such infringement of the copyright, etc., In that case, we will provide a distribution container for digital content that can surely pursue that action,
An electronic player capable of decrypting the encrypted digital content stored in the distribution container and reproducing the digital content without leaking to the outside is provided.

[Brief description of the drawings]

FIG. 1 is a block diagram showing the configuration of a specific example of a distribution container according to the present invention.

FIG. 2 is a block diagram illustrating a configuration of a specific example of a digital content distribution system in which a distribution container according to the present invention is used.

FIG. 3 is a block diagram showing a configuration of a specific example of an electronic player according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Embedding means 2 ... Content processing means for distribution 3 ... List disclosure means 4 ... Transmission path 5 ... User terminal 6 ... Access means 7 ... Contract execution system means 8 ... Contract fee payment confirmation means 9 ... Container formation means 10 ... Content 11 ... distribution means, distribution system 12 ... electronic player supply means 13 ... electronic player 14 ... download means 15 ... reproduction means 16 ... content reproduction means 17 ... content use situation analysis means 18 ... storage means 19 ... use situation analysis system 20 ... watermark information 21 ... Management program means 22 ... Content illegal use monitoring means 23 ... Content registration database 24 ... Copyright fee distribution means 25 ... Preview sample providing means 27 ... Digital content registration means 29 ... Digital content database 30 ... Distribution Content 31 ... User information management database 32 ... Product management database 33 ... Sales management database 34 ... Database forming means 40 ... Distribution container 41 ... Distributor, distributor homepage 50 ... Computer 51 ... Storage means 52 ... Output means 53 ... Container Driving means 54 ... Use condition storage means 56 ... Use count counter means 57 ... Clock means 58 ... Time counter means 59 ... Use status confirmation means 60 ... Operation input means 61 ... Container drive control means 62 ... Use count determination means 63 ... Use progress Time determination means 70 Input means 71 Buffer means 72 Decryption key storage means 73 Decryption means 74 Reproduction means 75 Control means 100 Digital content distribution system

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5C063 AA01 AB03 AB07 AC01 AC05 AC10 CA23 CA36 DA03 DA07 DA13 DB09 5C064 BA07 BB01 BB02 BC04 BC06 BC17 BC18 BC22 BC25 BD02 BD03 BD04 BD08 BD09 BD10 CA14 CA16 CB08 CC04 5J104 AA14 PA07

Claims (4)

[Claims] A digital content processing means for converting a content comprising one or more pieces of image information or audio information to which a copyright has been given into digital content, and embedding watermark information into the digital content; Embedding process, listing the plurality of digital contents including the watermark information by the list disclosure means via the Internet, and listening to only a part of the digital content including the watermark information via the Internet by the trial sample supply means. If the user wishes to use any of the digital contents including the watermark information, the contract execution means may determine whether the user and the distributor of the digital content can use the digital content. If you wish to use For digital content, the process of negotiating the terms and conditions of the digital content, including the terms and conditions of use of the digital content, the copyright fee, and the method of payment of the copyright fee. Digital content including information is encrypted by using a code that can be decrypted with a predetermined decryption key, and the encrypted digital content is added with the use condition of the digital content agreed to by the user and distributed. Creating content for distribution; containerizing the content for distribution by container creation means; determining payment payment means determining whether the user has paid a predetermined fee for use conditions of the digital content; Container delivery means is a payment confirmation When the user confirms payment of a predetermined fee for the usage condition of the digital content, the step of distributing the container on the Internet, the step in which the electronic player supply means previously discloses the electronic player on the Internet, A step in which the user terminal downloads the electronic player into its own terminal via the Internet, the user terminal stores the container distributed by the distributor of the digital content to the user through the Internet in the terminal; Downloading the encrypted digital content included in the downloaded container at the user terminal using the downloaded electronic player at the user terminal. Is temporarily stored in a predetermined buffer means of the electronic player, the encrypted digital content of the part stored in the buffer means is decrypted using the decryption key, and played back, After the reproduction, the other part of the encrypted digital content is overwritten and stored on the already reproduced digital content stored in the buffer means, and the other part is stored using the decryption key. Decrypting and playing back a part of the encrypted digital content, repeating the same operation, and repeating the above operation until the last part of the encrypted digital content is played back, according to a predetermined management program. When reproducing the digital content, the digital content to be reproduced is used for a predetermined time. A step of determining whether or not the digital content to be reproduced is matched with a predetermined use condition by the management program; If they do not match, the step of stopping the playback operation, the step of analyzing the use state of the digital content reproduced online via the Internet, the step of analyzing the use state of the digital content, and the step of monitoring unauthorized use are performed. Checking the presence or absence of digital content having predetermined image information or audio information among digital contents distributed through the Internet; If digital content having the obtained image information or audio information is found, A step of judging whether or not predetermined watermark information is embedded in the content and judging the presence or absence of unauthorized use, wherein the copyright fee distribution means converts the copyright fee paid by the user into Paying the copyright owner of the content via the Internet. 2. Terms of use of the digital content are as follows:
2. The digital content distribution system according to claim 1, wherein the digital content distribution number is the number of times the digital content has been reproduced or the elapsed time that can be reproduced. 3. The digital content distribution system according to claim 1, wherein the use of the digital content by the user is performed off-line,
2. The digital content distribution system according to claim 1, further comprising a step of issuing a warning to use the digital content from the next time online. 4. The digital content distribution system, when the user uses the digital content offline, and warns the user to execute the digital content from the next time online. 4. The method according to claim 3, further comprising the step of prohibiting the user from playing back the digital content if the user has used the digital content offline a predetermined number of times even after issuing the digital content. Content distribution system.