JP2003216828A - System and method for contents sale - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a contents sale system which can reduce the burden of development and maintenance concerned in copyright protection and can set a payment means in detail for every digital content. <P>SOLUTION: The contents sale system is characterized in that it is provided with a member managing means which inputs and records a user's registration application, a commodity managing means which sets information consisting of one or more digital contents and sells it as a commodity, a license managing means which issues and distributes licenses to respective digital contents, a contents managing means which records and distributes the digital contents included in the commodity, an authenticating means which confirms that a user is a legal commodity purchaser when inquired of by the contents managing means and license managing means, and an information terminal by which the user purchases and uses the commodity. <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 sales system for selling digital contents via the Internet.

[0002]

2. Description of the Related Art In recent years, digital books, music, photographs, videos, etc. have been digitized via a network on the assumption that they are used by an information terminal such as a personal computer.
Background services called screen images on screen, or copyrighted works such as software, have become popular.

In the distribution of such digital contents, it is a virtual store unit called a mall or shop that sets one or more payment methods such as credit card payment, debit card debit, transfer, cash payment at receipt, etc. It is common to be done in.

Therefore, in the conventional sale of digital contents, it is inconvenient that the user can select only one payment method in one purchase operation for purchasing a plurality of products at the same time.

[0005] In addition, such digital contents are generally used in order to prevent infringement of rights related to the digital contents such as illegal copying and illegal acquisition.
A copyright protection system provided by a company, such as Soft Inc., which proposes a data format of digital contents and a technology for producing and using the same is used.

[0006] Although various methods have been proposed for copyright protection, a distributor of digital contents is encrypted with a dedicated device (including software) for reproducing the contents for each data format of the digital contents. A method is mainly used in which digital content is distributed, a user obtains a license from the distributor of the content under a certain condition, and the digital content is decrypted and used by the license.

[0007] However, in the past, even in the case of copyright protection of the method of issuing the same license, Ado
Copyright protection related to documents such as books and photo books advocated by be, and copyright protection related to playback of music and images advocated by Microsoft differ according to the characteristics of digital content. Need to use multiple systems.

Therefore, when constructing one content sales system including a plurality of copyright protection systems,
There is a problem that the development man-hours increase because the interface for calling the functions of the copyright protection system from the program and the items required for license management and issuance are different.

[0009]

In order to solve such a problem, the present invention can reduce the development and maintenance load related to copyright protection, and can finely set the payment means for each digital content. The purpose is to provide a content sales system.

[0010]

In order to solve the above problems, the first aspect of the present invention is a user application for registration in a content sales system for distributing or selling digitized contents via the Internet. Member management means for inputting and recording, product management means for setting product information consisting of one or more digital contents and selling as a product, license management means for issuing and distributing a license to each of the digital contents And content management means for recording and distributing the digital content contained in the product, and authentication for confirming that the user is a legitimate purchaser of the product in response to inquiries from the content management means and the license management means. Means and an information terminal through which a user purchases and uses the product are provided.

A second aspect of the present invention is, in the content sales system according to the first aspect, a product in which the product management means is associated with the product and one or a plurality of digital contents constituting the product. A product setting means for setting and recording information, a payment method setting means for setting a different payment method for each of the products, and a product selling means for allowing the user to select and purchase the product are provided. It is a thing.

A third aspect of the present invention is, in the content selling system according to the first or second aspect, a license condition setting means for setting and recording a condition for issuing a license in the license management means, First authentication requesting means for requesting the authentication means to confirm that the person requesting the distribution is an authorized purchaser of the product before delivering the license, and to the authorized purchaser of the product. A license issuing means for issuing a license and a license delivery means for delivering a license for each of the plurality of digital contents constituting the product to a purchaser of the product collectively or individually are provided.

According to a fourth aspect of the present invention, in the content sales system according to the above-mentioned first to third aspects, the content management means is provided with different works depending on the data format of each digital content constituting the product. An encryption unit that performs encryption for right protection, a content recording unit that stores the encrypted digital content, and a person who requests distribution before distributing the digital content that constitutes the product Second authentication requesting means for requesting the authentication means to confirm that the customer is an authorized purchaser, and content distribution means for collectively or individually distributing the plurality of digital contents constituting the product to the purchaser of the product. Is provided.

According to a fifth aspect of the present invention, in the content selling system according to the first to fourth aspects, the information terminal is connected to the product selling means, the license managing means and the content managing means. Information exchange means for exchanging information, decryption means for decrypting the encryption applied to the digital contents constituting the product by using the distributed license, and utilization utilizing the digital contents constituting the product And means are provided.

According to a sixth aspect of the present invention, in the content selling system according to the above-mentioned first to fifth aspects, the merchandise selling means has a member screen individually prepared for each member. , A list of the products, a payment method set for each of the products, a list of one or more digital contents constituting the products, and a copyright protection method applied to each of the digital contents. The product information display area is provided.

According to a seventh aspect of the present invention, in the content sales system according to the above-mentioned first to sixth aspects, the membership screen displays the license related to the digital content constituting the product purchased by the user. A license status display area for displaying the distribution status, the validity of the license, or the invalidity of the license is provided.

An eighth aspect of the present invention is the content sales system according to the first to seventh aspects, wherein the member screen of the information terminal is provided with start-up means for starting execution of the utilizing means. It is a thing.

A ninth aspect of the present invention is a content selling method for distributing and selling digitalized content via the Internet, the step of creating digital content and the license issuing conditions for the digital content. A step of setting, a step of applying copyright protection to the digital content data based on the type of data of the digital content and an issuance condition of the license, and a product combining one or a plurality of the digital contents. A step of setting a payment method for each product, a step in which the user browses the product and selects a desired product for purchase and a payment method,
Purchasing a product by selecting the desired product and payment method, authenticating a user who purchased the product, and distributing licenses relating to a plurality of digital contents constituting the sold product, Distributing a plurality of digital contents constituting the sold product, and using each digital content according to copyright protection given to the digital contents constituting the product by a user who purchased the product. It is provided.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below with reference to illustrated embodiments. Here, for ease of understanding, a conceptual embodiment will be described first, and then a specific embodiment will be described.

FIG. 1 is a block diagram showing an embodiment of a content sales system of the present invention. Member management means 2 for inputting a user (hereinafter referred to as member) registration application and recording member information 1 , A product management unit 5 that sets and sells product information 4 related to a product composed of one or a plurality of digital contents 3, and a license 6 is issued and distributed to each of the digital contents 3 to distribute the digital contents 3
The license management unit 7 that permits the use of the license, the content management unit 8 that records and distributes the digital content 3 that configures the product, and the members from the license management unit 7 and the content management unit 8 are authorized by the member. It comprises an authentication means 9 for confirming that the person is a purchaser of a product, an information terminal 10 capable of purchasing the product and reproducing each of the digital contents 3 constituting the product, and a communication means 11.

Member management means 2, product management means 5, license management means 7, content management means 8 are communication means 1
1 is a computer system capable of exchanging information with the information terminals 10 of an unspecified number of users according to 1. From the viewpoint of hardware, a recording device for a computer (magnetic disk, optical disk, etc.) for recording information, a computer It is realized by an input device (keyboard, mouse, bar code reader, etc.) for giving instructions, a CPU for performing calculations, a display device such as a CRT for displaying results, an interface for exchanging information with other devices, and the like.

Further, the product management means 5 sets and records the product information 4 in which the product and one or more digital contents 3 constituting the product are associated with each other and recorded.
And a payment method setting means 14 capable of setting a different payment method 13 for each of the products, and allowing the member to select the product,
It is provided with a commodity selling means 15 for purchasing.

The license management means 7 sets the license issuance condition 16 for issuing the license 6 and records the license condition setting means 17 and the person who requests the distribution of the license 6 are authorized purchasers of the product. First authentication requesting means 18 for requesting the authentication means 9 to confirm that
And a license issuing means 19 for issuing a license 6 to a legitimate purchaser of the product, and a license delivery means for delivering the license 6 to each of the digital contents 3 constituting the product to the purchaser of the product collectively or individually. 20 and 20 are provided.

Further, the content management means 8 is an encryption means 2 for performing encryption for copyright protection according to each data format of the digital content 3 constituting the product or software for using the digital content 3.
1, content recording means 22 for recording the digital content 3, and before distributing the digital content constituting the product, the authentication means confirms that the person requesting the distribution is a legitimate purchaser of the product. The second authentication requesting means 23 for making a request to the customer and the content distributing means 24 for distributing the digital contents 3 constituting the product to the purchaser of the product collectively or individually.

The license issuing means 19 and the encrypting means 21 are, as described in the prior art, Adobe or Mi.
It is common to use a copyright protection system provided by a company that proposes a data format of digital contents or a technique for producing and using digital contents, such as Microsoft Corporation.
Therefore, different types of digital content 3
In a content sales system that handles a plurality of types, a plurality of types of license issuing means 19 and encryption means 21 are provided for each data format, production and utilization technology.

Member information 1, digital contents 3, merchandise information 4, settlement information 14, license issuance conditions 16, etc. are recorded in the database 25, respectively. Also, FIG.
In the above, the purchase history 26 of the member is also recorded in the database.

The information terminal 10 used by a member who wants to purchase a product can exchange information with the member management unit 2, the product management unit 5, the license management unit 7, and the content management unit 8 via the communication unit 11. Information exchange means 2
7, a decrypting means 28 for decrypting the digital content 3 using the license 6, and a utilizing means 29 for actually utilizing the digital content. The device is not limited to a specific device as long as it has the above-mentioned means, but a personal computer is generally used.

The communication means 11 actually uses the Internet, which is a general-purpose wide area network. The member management unit 2, the product management unit 5, the license management unit 7, the content management unit 8 and the information terminal 10 are connected.

Next, the data structure and operation used by the content sales system shown in FIG. 1 will be described in detail with reference to FIGS. 2 to 6.

First, the digital content 3 will be described. Digital contents 3 are 1) books, 2) photos,
It is various kinds of digitized data such as 3) music, 4) video, 5) wallpaper, 6) software.

The above-mentioned method of using the digital contents 3 includes 1) a method of using after downloading all data to the information terminal 10 and 2) a method of using while downloading to the information terminal 10 called a streaming method. There is. Since the content delivery means 24 are different between the download method and the streaming method, a plurality of different method content delivery means 24 are provided.

For example, books, wallpapers, and software are typical examples of digital contents 3 of the download type, and music and video are typical examples of the streaming type. However, music and video can also be downloaded. It is used properly depending on the amount of data and the content of the digital content 3.

Next, the configuration of the product, the product information 4, and the payment method 13 will be described with reference to the examples of FIGS. 2 (a) to 2 (d). FIG. 2 is an example of the data structure, and the data structure is not limited as long as the association shown in FIG. 2 can be realized.

2A and 2B show "Shinjuku".
Indicates the product. Figure 2 (a) shows the product "Shinjuku"
It is shown that it is composed of three digital contents 3 of "video 1", "music 1", and "music 2", and different copyright protection is applied to each of the video and music data depending on the type of data.

FIG. 2 (b) shows that when purchasing the product "Shinjuku", "credit card", "prepaid card",
This is a data structure indicating that “Postal transfer” can be selected as the payment method 13.

Therefore, the product "Shinjuku" has three digital contents 3 with different copyright protections.
Can be sold or purchased using one of the three payment methods 13 with a single operation.

Further, FIG. 2 (c) and FIG. 2 (d)
Indicates a product called "Wallpaper Collection (Shibuya)". As shown in Fig. 2 (c), the product "Wallpaper collection (Shibuya edition)" consists of two wallpapers, "Wallpaper 1" that has a digital watermark for copyright protection and "Wallpaper 2" that does not require copyright protection. Digital content 3
2D, as shown in FIG. 2D, it is a product for which “bank transfer” and “convenience store settlement” can be selected as the payment method 13.

By configuring the product information 4 as shown in FIGS. 2 (a) and 2 (c), the product can be composed of a plurality of digital contents 3 having different copyright protection systems, and one product can be sold or sold. It becomes possible to make a unit of purchase.

By configuring the payment information 13 as shown in FIGS. 2 (b) and 2 (d), it is possible to set different payment methods 13 for different products. Although the operation at the time of purchase is often complicated, FIG. 2 (b) and FIG.
By changing the product in (d) to the digital content 3, it is possible to sell or purchase a plurality of digital contents 3 constituting one product by different payment methods 13.

Next, referring to FIG. 3, a product, which is a unit of sales from the production of the digital content 3, that is, product information 4
Up to setting, the two products and the five digital contents shown in FIGS. 2A and 2C will be described as an example.

First, five kinds of digital contents 3 of "picture 1", "music 1", "music 2", "wallpaper 1" and "wallpaper 2" are created using commercially available or publicly available tools. Create (step S1).

Copyright protection is applied to the created "picture 1", "music 1", "music 2" and "wallpaper 1". The license condition setting means 17 sets the license issuance condition 16 for issuing the license 6 such as the usable period of the digital content 3, the usable number of times, the propriety of copy creation, and records it in the database 25 (step S2). .

In the example of FIG. 2A, the same method is used for copyright protection of "music 1" and "music 2" having the same data type. Even for digital contents 3 of the same music, if the data format is different, that is, the software of the player for reproduction is different, the copyright protection method may be different.

Next, the encryption means 21 uses the license issuance condition 16 and the data formats of "video 1", "music 1", "music 2", and "wallpaper 1", respectively, for "video" and "video", respectively. The contents recording means 22 performs the database 25 by performing encryption such as "for music" and "digital watermark".
(Steps S3 and S4).

FIG. 4 shows an example of the license issuing condition 16. FIG. 4A shows a digital content 3 such as “viewing time limit and end date”, “rental permission”, “print count and permission period” which is supposed to be used for viewing and printing digitized books. Is a part of the items of the license issuance condition 16 relating to

FIG. 4B is assumed to be used for reproduction of digitized video such as "reproduction environment", "reproduction count", "disclosure start date and end date", "whether or not stream data can be stored". It is a part of the items of the license issuance condition 16 relating to the digital content 3 to be generated.

The structure of the license issuance condition 16 shown in FIGS. 4A and 4B is recorded in association with an identifier for identifying the digital content 3 and information of a server requesting authentication related to copyright protection.

When selling a digital content 3 such as "wallpaper 2" which does not require copyright protection, the digital data 3 is not encrypted and the original data is stored in the database 25 by the content recording means 22. Record (step S4).

Next, the product setting means 12 sets that the combination of the three digital contents 3 of "picture 1", "music 1" and "music 2" is one product called "Shinjuku". Then, the product information 4 is recorded in the database 25 (step S5).

Furthermore, the price of each digital content is determined, and the payment method setting means 14 selects "credit" as the payment method 13 that can be selected when the product "Shinjuku" is purchased as shown in FIG. 2 (b). Database 25 for 3 types of "card", "prepaid card" and "postal transfer"
(Step S6).

Similarly, for the product "Wallpaper collection (Shibuya edition)", "Wallpaper 1" and "Wallpaper 2" are designated as the digital contents 3 constituting the product, and "Bank transfer" and "Convenience store settlement" are the products. Is recorded in the database 25 as a payment method 13 that can be selected when purchasing (step S
6).

Next, with reference to FIG. 5, the process from the purchase of the product to the use of the digital content will be described with reference to an example of purchasing the product “Shinjuku” from the above two products.

The member uses the information terminal 10 to connect to the product sales means 15 and inputs the member number and password. The merchandise selling means 15 uses the input information as the member information 1
By contrasting with the above, it is confirmed that the member is a member who can use the content sales system (step S
7).

The member displays the member screen 30 individually prepared for each member on the information terminal 10 by the product selling means 15, selects the product “Shinjuku”, and selects “credit card” as the payment method 13. Purchase products (step S
8).

FIG. 6 shows an example of the member screen 30. The member screen 30 is a product information that displays a list of products, a payment method 13 that can be selected when purchasing the product, a list of digital contents 3 that compose the product, and a copyright protection method applied to the digital contents 3. The display area 31 is provided so that the member can make a necessary selection from the displayed contents and purchase the product.

The merchandise selling means 15 records the purchase history 26 of the member in the database 25 based on the information input through the member screen 30, and carries out the procedure related to the payment by a separately constructed payment system or the like.

Since the three digital contents 3 constituting the purchased product "Shinjuku" are copyright-protected, it is necessary to obtain the license 6 in order to use the "video 1". The license 6 can be acquired at any time after the procedure for purchasing the product is completed and before the digital content 3 is used.

The member connects to the license management means 7 through the information terminal 10 to request the distribution of the license 6 relating to "Video 1" and to prove that he / she is a purchaser who has a valid usage right. Information (membership number and password, etc.) is transmitted (step S9).

The license management means 7 uses the first authentication requesting means 18 to encrypt the member number, the product number, etc. for security and passes them to the authenticating means 9, and gives the member "image 1".
It is determined whether the license 6 is issued and distributed (step S10).

The authenticating means 9 refers to the purchase history 26, for example, based on the information passed by the first authentication requesting means 18, and confirms whether or not the member purchases the product "Shinjuku". Is encrypted for security and returned to the first authentication requesting means 18.

When the member purchases the product "Shinjuku", the license issuing means 19 uses the license issuing condition 1
6, the license 6, which is a digital key for decrypting the encryption applied to the "video 1", is created, and is distributed to the information terminal 10 by the license distribution means 20 (step S11).

The delivered license 6 is the information terminal 10
Save to. As shown in FIG. 6, the member screen 30 displays information related to the license 6, such as the presence or absence of distribution of the license 6 and the expiration date, in the license status display area 32.

Next, the member connects to the content management means 8 through the information terminal 10 and makes a request for distribution of "picture 1",
Information for certifying that the customer is a purchaser who has a valid usage right is transmitted (step S12).

The content management means 8 uses the second authentication requesting means 23 to encrypt the member number, the product number, etc. for security and passes them to the authenticating means 9 to give the member "image 1".
Whether or not to distribute the data of (step S
13).

Based on the information passed by the second authentication requesting means 23, the authenticating means 9 refers to, for example, the purchase history 26 and confirms whether or not the member has purchased the product "Shinjuku", and the result Is encrypted for safety and returned to the second authentication requesting means 23.

When the member purchases the product "Shinjuku", the content distribution means 24 distributes the data of "Video 1" recorded in the database 25 to the information terminal 10 (step S14). .

The member decrypts "Video 1" using the license 6 stored in the information terminal 10 after being distributed by the decryption means 28, and determines the usage conditions such as the permitted period or the number of times. Originally, "video 1" can be enjoyed using the utilizing means 29 (step S15).

It is also possible to collectively deliver the three licenses 6 for "video", "music 1", and "music 2" constituting the product "Shinjuku" by one delivery request. Also,
It is also possible to collectively deliver the three data of "video", "music 1", and "music 2" by one delivery request.

In this embodiment, after purchasing the product, the license 6 is first acquired, and then the distribution of "picture 1" is requested. This is for streaming video data,
This is because download and reproduction to the information terminal 10 are performed at the same time, and therefore, even if the license 6 is not obtained in advance, the download is substantially impossible.

Therefore, in the case of digital contents 3 such as books and photographs which are not in the streaming system, it is possible to have the digital contents 3 delivered first and obtain and use the license 6 later. Even if an attempt is made to use the digital content 3 before the license 6 is distributed, the copyright of the digital content 3 is protected because the decryption means 28 does not have the license 6.

The member screen 30 is provided with a start-up means 33 for starting up the use means 29. In the case of streaming type digital content 3, when the license 6 is received, the start-up means 33 starts up the use means 29, and the digital content is displayed. It is also possible to enjoy 3. It is possible to omit the procedure for the member to record the digital content 3 and activate the utilization means 29.

The present invention has been described above in detail based on the embodiments. However, the license management system according to the present invention is not limited to the above embodiments and does not depart from the gist of the present invention. It goes without saying that various changes can be made in the range.

For example, it is possible to record the digital content without encryption, and when the member requests the distribution of the license, the digital content is encrypted and distributed simultaneously with the license.

In this case, a flexible license issuing condition and a price corresponding to the license issuing condition can be set by having the member select the condition for issuing the license within the agreed range. Is possible,
It becomes possible to provide a wider variety of products.

[0075]

As described above, according to the content sales system and method of the present invention, the digital content and the license issuance condition are associated with each other and stored in the database, so that the license issuance condition can be simply referred to. Copyright protection according to digital contents can be implemented, and there is no need to perform development such as branching processing by program logic.

Also, when the copyright protection means is changed or added, the license issuing condition recorded in the database is changed or a new license issuing condition is simply added to deal with it without program development. Is possible.

Further, even when there are a plurality of license issuing means having different specifications, the license issuing means can easily issue a license by simply confirming the purchase of the user's product by the authentication means. It becomes possible to judge the propriety. The exchange of information in the authentication means is encrypted and safe. The content distribution means is also the same.

Further, since a product screen, a digital content, a copyright protection system, a license status, etc. are displayed on a member screen prepared individually for each member, and a starting means is provided, the digital content can be used from the purchase of the product. You can enjoy digital contents with few operations, because the information up to is sufficiently presented.

Further, since the payment method can be selected from a plurality of options for each product, the mall or shop has a variety of products and is convenient for the user. At shops and malls, it is possible to sell according to the price of products and the characteristics of digital contents, so it can be expected to improve profits.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a content sales system of the present invention.

FIG. 2 is a structural diagram of data used in the present invention.

FIG. 3 is a flowchart from production of digital contents of the present invention to setting as a product.

FIG. 4 is a configuration diagram of an embodiment of a license issuance condition of the present invention.

FIG. 5 is a flowchart from the purchase of a product of the present invention to the use of digital content.

FIG. 6 is an example of a member screen of the present invention.

[Explanation of symbols]

1 Member information 2 Member management means 3 Digital contents 4 product information 5 Product management means 6 licenses 7 License management means 8 Content management means 9 Authentication means 10 Information terminal 11 Communication means 12 Product setting means 13 payment methods 14 Payment method setting means 15 Product sales means 16 License issuance conditions 17 License condition setting means 18 First Authentication Request Means 19 License issuing means 20 License distribution means 21 encryption means 22 Content recording means 23 Second Authentication Request Means 24 Content Delivery Means 25 database 26 Purchase history 27 Information Exchange Means 28 Decoding means 29 means of use 30 Member screen 31 Product information display area 32 License status display area 33 Starting means

Claims (9)

[Claims] 1. A content sales system for distributing or selling digitized contents via the Internet, wherein a member management means for inputting and recording a user registration application and one or more digital contents. And a license management unit that issues and distributes a license to each of the digital contents, and a content that records and distributes the digital contents included in the products. Management means, authentication means for confirming that the user is a valid purchaser of the product in response to inquiries from the content management means and the license management means, and information for the user to purchase and use the product. A content sales system comprising: a terminal. 2. The content sales system according to claim 1, wherein the product management unit sets and records product information in which the product and one or more digital contents forming the product are associated with each other. Content comprising: setting means, payment method setting means capable of setting a different payment method for each of the products, and product selling means by which a user can select and purchase the product. Sales system. 3. The content sales system according to claim 1, wherein the license management means sets a license issuing condition and records the license condition setting means, and before distributing the license. First authentication requesting means for requesting the authentication means to confirm that the person requesting distribution is a legitimate purchaser of the product, and license issuance for issuing a license to the legitimate purchaser of the product. A content distribution system comprising: means and a license distribution means for collectively or individually distributing a license for each of the plurality of digital contents constituting the product to a purchaser of the product. 4. The content sales system according to any one of claims 1 to 3, wherein the content management means protects different copyrights depending on the data format of each digital content constituting the product. Before distributing the digital content forming the product, the encryption means for performing the encryption of the above, the content recording means for storing the encrypted digital content, and the person requesting the distribution Second authentication requesting means for requesting the authentication means to confirm that the customer is a purchaser; content distribution means for distributing the plurality of digital contents constituting the product to the purchaser of the product collectively or individually;
A content distribution system comprising: 5. The content sales system according to claim 1, wherein the information terminal comprises:
Information exchange means for connecting to the product selling means, the license managing means, and the content managing means for exchanging information, and using the distributed license, encrypt the digital contents constituting the product. A content sales system, comprising: a decryption unit for decrypting; and a utilization unit for utilizing the digital content constituting the product. 6. The content selling system according to claim 1, wherein the product selling unit includes a member screen individually prepared for each member, and the product is displayed on the member screen. , A payment method set for each product, a list of one or more digital contents constituting the product, and a copyright protection system applied to each of the digital contents. A content sales system comprising an information display area. 7. The content sales system according to claim 1, wherein the member screen is
A content sales system, comprising: a license status display area for displaying the distribution status of the license or the validity of the license or the invalidity of the license related to the digital contents constituting the product purchased by the user. 8. The content sales system according to claim 1, wherein, in the information terminal, the member screen includes an activation unit that starts execution of the utilization unit. And content sales system. 9. A content selling method for distributing and selling digitalized content via the Internet, the steps of creating digital content, and setting license issuance conditions for the digital content. Based on the type of data of the digital content and the issuance conditions of the license, a step of applying copyright protection to the data of the digital content, and a step of setting a product by combining one or a plurality of the digital content. A step of setting a payment method for each product, a step in which the user browses the product and selects a desired product and a payment method, and a step of purchasing the product by selecting the desired product and the payment method And a step of authenticating a user who purchased the product, and a step of composing the sold product. A number of licenses relating to digital contents, a plurality of digital contents constituting the sold product, and a user who purchased the product applied to the digital contents constituting the product. According to copyright protection, a step of using each digital content is provided, and a content selling method characterized by the above.