KR20000050097A - Distributed electronic commerce system and method using digital catalog - Google Patents

Abstract

PURPOSE: A distributed electronic commerce system and method is provided to prevent sellers from high-capacity servers for the electronic transactions by varying digital catalogs in information terminals of purchasers, so that business conclusions can be agreed in the information terminals and accounts can be settled in servers of mediators. CONSTITUTION: A system for electronic transactions comprises a seller terminal(10), a purchaser terminal(20), and a mediator server(30). The seller terminal stores a software module and performs the software module. The software module sets up digital catalogs. The purchaser terminal stores and a software module capable of participating in purchases, and performs the software module. The mediator server registers basic facts of a seller and a purchaser. The mediator server transmits an order bill from the purchaser to the seller, and receives payments by payment information inserted into the order bill. If the seller transmits a product to the purchaser, the mediator server receives a mediating commission, and transmits the rest payment to the seller.

Description

Distributed electronic commerce system and method using digital catalog

The present invention relates to a distributed electronic commerce system and method, and more particularly, to a distributed electronic commerce system and method using a digital catalog, in which commerce conclusion does not occur centrally in a seller's server system but is distributed in a buyer's information terminal. will be.

Recently, e-commerce using cyberspace has been exploding, and the existing conventional commerce system, which has been established until now, is being changed into a new concept of online e-commerce system. As a result, the number of e-commerce sites using the Internet is spreading at an enormous rate. Classic commerce has been carried out between customers and merchants in the real market, whether wholesale or retail, and is largely a B2C (Business to Consumer) retail commerce and B2B (B to B; Business to Business) can be categorized as wholesale commerce, but broadly, commerce is generated between the Internet shopping between the customer and the merchant, that is, the merchant (seller), the electronic shopping mall and the customer (buyer). This will be described with reference to FIG. 1. As shown in FIG. 1, the normal commerce is conducted between the seller 10 and the buyer 20, whether offline or online. When the buyer 20 orders 15 from the seller 10, the seller 10 delivers goods 25 to the buyer 20. In this case, in the case of the e-commerce, the seller 10 establishes a highly reliable internet e-commerce site to generate a mutual trust commerce to the buyers, but in the present computer and communication environment to deliver all the product information to the buyers, Insufficiency is a common reflection. Moreover, although the seller's server environment can carry a lot of product information, the buyer's computer and communication environment will suffer from traffic when the amount of information sent from the seller's server is high, making it difficult to develop smooth commerce.

The technical problem to be achieved by the present invention is to provide a distributed electronic commerce system and method by a digital catalog that occurs in the buyer's information terminal rather than concentrated in the seller's server.

Another technical problem to be achieved by the present invention is that the transaction is made in the buyer's information terminal, the payment takes place in the server of the intermediary, the seller does not need to have a large-scale e-commerce server distributed electronic commerce system and method The purpose is to provide.

Another technical problem to be solved by the present invention is that the product information may necessarily be transmitted through a network such as web information or e-mail, but any offline digital medium may be used, and thus the seller may use digital image, audio and video files. It is an object of the present invention to provide a distributed digital commerce system and method using a digital catalog that can sufficiently input product related information such as (audio, video file) into the digital catalog without worrying about network traffic.

1 is a block diagram illustrating a conventional electronic commerce system.

2 is a block diagram illustrating a distributed electronic commerce system using a digital catalog according to the present invention.

FIG. 3 is a configuration diagram illustrating a first embodiment of a distributed electronic commerce system using a digital catalog shown in FIG. 2.

4 is a configuration diagram illustrating a second embodiment of a distributed electronic commerce system using a digital catalog shown in FIG. 2.

5 is a flowchart illustrating a distributed electronic commerce method using a digital catalog according to the present invention.

6 is a diagram illustrating an example of a digital catalog applied to the present invention.

7 is a view showing an example of an order to be applied to the present invention.

<Description of the code | symbol about the principal part of drawing>

10 ... seller, 20 ... buyer

30 ... mediator, 102, 102 '... publisher of digital catalog

104 '... Communication Layer, 202, 202' ... Enabler

204, 204 '... Communication layer, 104, 206, 308 ... Public key operator

208 ... database, 302, 302 '... order forwarder

303 Public key manager, 304 Order queue

306, 306 '... payment applicant, 310 ... public key server

In accordance with one aspect of the present invention, there is provided a seller terminal capable of storing and performing a software module capable of creating a digital catalog in its own terminal. A buyer terminal capable of storing and performing a software module capable of participating in a purchase in its own terminal; And registers the basics of the seller and the buyer, forwards the order sent from the buyer to the seller, receives payment by the payment information described in the order, and when the seller delivers the product to the buyer, the broker takes commission and pays the rest of the payment. It provides a distributed electronic commerce system by a digital catalog comprising a; intermediary server for delivering to.

Preferably, the software module stored in the purchaser terminal includes a database which is a storage device having basic information of a buyer, payment means, delivery location, and also managing a purchase history; A public key operator providing basic functions of a public key infrastructure (PKI) such as certificate request, certificate verification, digital signature, digital signature verification, encryption, and decryption; A communication layer for performing encrypted communication with a corresponding server system in a group of intermediary server systems; And an electronic commerce enabler (EC enabler) for opening an order for opening a digital catalog manufactured and distributed by a seller.

Preferably, the S / W module stored in the purchaser's terminal is provided with an authorization purchase order communication layer called IRP (InterRights Point) and a digital catalog online or offline from the seller through web, email, CD, DVD, etc. It includes an enabler that accepts and opens digital catalogs, including digital content, through an Authorized Purchase Order Communication Layer (IRP).

Preferably, the software module (S / W Module) stored in the seller terminal provides PKI basic functions such as certificate request, certificate verification, digital signature, digital signature verification, encryption, decryption, and issued by different authentication service organizations. PKI Toolkit, basic HTML editing functions, and other HTML files, which allow you to write certificates that you can use, can be imported and digitally attached by attaching the seller's certificate and the seller's digital signature. It includes a digital catalog publisher (EC Publisher) who creates a catalog and delivers it to buyers through various media such as web, email, CD, DVD, and the like.

Preferably, the software module stored in the seller terminal includes an authorization purchase order communication layer called IRP and a digital catalog issuer that has basic HTML editing functions and can import other HTML files.

Preferably, the software module stored in the intermediary server is composed of a certification authority server, a registration authority server, and a directory server to issue certificates and verify certificates to each registered buyer and seller. A public key server that informs a public key of a pre-authenticated person and may receive an external authentication service; A public key operator that provides basic PKI functions such as certificate request, certificate verification, digital signature, digital signature verification, encryption, and decryption, and can write certificates issued by different certification service organizations; An order queue, which is a message queue in which an order received from a purchase order communication layer of a buyer's software module is stored before being processed by an order forwarder; Order forwarder delivering the order to the seller; And a payment supporter for supporting a credit card, electronic money, and money transfer using a financial value added network (VAN).

Preferably, the software module stored in the intermediary server system uses a public key manager (Deployment Manager) to perform a public key server function, a commercial agency (Clearinghouse) and a financial VAN. Includes a Payment Gateway that supports credit cards, electronic money, money transfer, and the like.

According to another aspect of the present invention, in order to achieve the above another technical problem, the seller installs a software module in the terminal that he or she uses to register in the intermediary server system and create a digital catalog, and the buyer is the intermediary server. Installing a software module in its information terminal that can register with the system and participate in a purchase; After this initial registration occurs, the seller creates a digital catalog and distributes the digital catalog to buyers through various media such as Web, email, CD, DVD, etc .; The purchaser opens a digital catalog at his or her information terminal such as a PC, a web TV, a web phone, or the like to determine a purchase item; Then, the buyer delivers the order containing the purchase items, shipping information and payment information to the intermediary server through the network; The broker performs payment processing and delivers the order to the seller; Seller delivers the goods selected by the buyer to the buyer; And the broker provides a distributed electronic commerce method by a digital catalog comprising a; when the goods are delivered to the buyer, taking the brokerage fee and deliver the remaining payment to the seller.

Preferably, the buyer checks whether the digital catalog has been issued by an authorized seller or has not been tampered with; The buyer opens the digital catalog to display the product information on the terminal screen; A buyer viewing the displayed product information and determining a purchase item, a receiving place, and a payment method; Buyer issues an order; The buyer makes an electronic signature to prevent the contents of the order from being altered; An order created by the buyer is delivered to the order queue of the intermediary; And delivering the unsent order to the batch broker server system once the order is finally stored in the database and the buyer finally wants to transmit the order.

Preferably, the buyer opens the digital catalog received online or offline through the web, email, CD, DVD, etc. from the seller; Displaying product information included in the digital catalog on a screen; Buyer receives a purchase item, a delivery place, a payment method to generate an order; Storing the audit record in a database protected in an audit record format; And forwarding the order to the intermediary server system when the buyer confirms that the undelivered order is in the protected database.

Hereinafter, with reference to the accompanying drawings, it will be described in more detail the configuration and operation of the distributed electronic commerce system and method by a digital catalog according to a preferred embodiment of the present invention.

2 is a block diagram illustrating a distributed electronic commerce system using a digital catalog according to the present invention. The distributed electronic commerce system by the digital catalog of the present invention will be described with reference to the schematic configuration diagram shown in FIG. As shown in FIG. 2, since the distributed electronic commerce system using the digital catalog of the present invention has an intermediary 30 in addition to the seller 10 and the buyer 20, the commerce purchase act is performed by the seller 10 and the buyer 20. ), The seller 10 distributes the digital catalog 22 to the buyer, the buyer 20 issues an order 35 to the broker 30, and the broker 30 is the seller ( 10) informs the order fact 36, the seller 10 delivers the order goods 25 to the buyer 20, wherein the broker 30 deducts the brokerage fee from the payout received from the buyer 20 The rest of the sale 38 is generated to the merchant 10 in a way to generate the commerce.

Sufficient functions should be implemented to conveniently execute the above-described business model, and measures should be taken to prevent leakage of transaction details, transaction information, and the like. This will be described with reference to FIGS. 3 and 4.

FIG. 3 is a configuration diagram illustrating a first embodiment of a distributed electronic commerce system using a digital catalog shown in FIG. 2. In FIG. 3, Public Key Infrastructure Technology (PKI) is applied. As shown in FIG. 3, the distributed digital commerce system using the digital catalog of the present invention utilizes the existing PKI technology for some of the implementation requirements as follows. That is, the initial registration of the buyer and seller performs PKI authentication, performs PKI digital signature to prevent transaction repudiation, and performs encryption to maintain trade confidentiality. Other parts of the present invention can be implemented as follows. In this embodiment, the Internet is used as the communication network between the buyer 20, the seller 10, and the intermediary 30, and a PC capable of connecting to the Internet is used as the information terminal. In the present invention, the digital catalog is an HTML file attached to the electronic signature of the seller 10 to provide multimedia information about the product and to purchase information (quantity, options, price) online. Or it receives the input offline and delivers to the software module (S / W Module) of the buyer (20). At this time, the electronic signature of the seller 10 should be attached, because it is possible to determine who the seller 10 is not tampered with in the delivery process. The method of displaying purchased item information in the digital catalog is determined by the seller. The broker 30 delivers an order including the purchase item information to the seller 30 in a manner in which the buyer 20 opens the digital catalog to view and make a purchase decision. Hereinafter, detailed configurations and operations of the seller 10, the buyer 20, and the intermediary 30 of FIG. 3 will be described.

First, the buyer software module (S / W Module) stored in the buyer terminal of the buyer 20 is an EC enabler (202), a purchase order communication layer (Communication Layer) 204, a public key operator (PKI Toolkit) 206, and a database 208.

In the software module of the purchaser 20, the database 208 is a persistent storage of the buyer software module which contains information on the basic information of the buyer, payment method, delivery location, and also manages the purchase history. . Manage certificates and public keys of merchants that have already traded. The public key operator 206 provides basic PKI functions such as certificate request, certificate verification, digital signature, digital signature verification, encryption, and decryption. It also allows the use of certificates issued by different certification services. The communication layer 204 performs encrypted communication with a corresponding server system of a group of intermediary server systems. The EC enabler 202 receives information on the basic personal information, payment method, and delivery location of the buyer 20 if the buyer 20 is not registered in the server 310 of the intermediary 30. It registers with the server 310 of the intermediary 30 through the authentication procedure. If the purchaser 20 is already registered, the seller 10 opens the digital catalog produced and distributed and processes the e-commerce as follows.

1. Check the certificate and the digital signature of the seller. That is, it is checked whether the digital catalog is issued by the authorized seller 10 or is not tampered with.

2. The purchaser 20 opens the digital catalog via the EC enabler 202 and displays the product information on its terminal screen.

3. The purchaser 20 looks at the product information displayed through the EC enabler 202 and determines the purchase item, the receiving place and the payment method.

4. The buyer 20 issues an order. The order form is automatically generated in a predetermined form.

5. The purchaser 20 makes an electronic signature through the public key operator 206. That is, the purchaser 20 makes an electronic signature to prevent the contents of the order from being altered.

6. The order form 10, once stored in the database 208 and finally the buyer 20 wants to send the undelivered order to the intermediary server system through the purchase order communication layer (Communication Layer) (204) . The order created by the buyer 20 is delivered to the order queue 304 of the intermediary (30).

Next, the software module (S / W Module) stored in the seller terminal of the seller 10 includes a public key function (PKI Toolkit) 104 and the digital catalog publisher (EC Publisher) 102.

Like the purchaser software module, the public key operator 104 of the seller software module provides basic PKI functions such as certificate request, certificate verification, digital signature, digital signature verification, encryption, and decryption. Make the certificate available. In addition, the publisher of the digital catalog can import basic HTML editing functions and other HTML files, and create a digital catalog by attaching the certificate of the seller and the electronic signature of the seller. ), Through the various media such as email (email), CD, etc. to the buyer 20. In FIG. 3, the digital catalog produced at the seller side is delivered to the EC enabler 202 of the buyer. The seller 10 also registers the seller's registration information in the public key server 310 of the intermediary 30 through an authentication procedure through the seller's public key operator 104.

Finally, the software module stored in the server system of the intermediary 30 is a component of the public key server (PKI Server) 310, the public key functional tool (PKI Toolkit) 308, the order queue (304) ), An EC Broker 302, and a Payment Gateway 306.

The intermediary 30 side is provided with a public key server 310 which is absent from the buyer and seller. Although not shown in the drawing, the public key server 310 is composed of a certification authority server, a registration authority server, and a directory server to issue certificates to each registered buyer and seller. It verifies the certificate and tells you the public key of an already authenticated person. The intermediary 30 may receive an external authentication service without directly operating the public key servers.

Next, as in the buyer and seller, includes a public key operator 308, which provides PKI basic functions such as certificate request, certificate verification, digital signature, digital signature verification, encryption, decryption. It also allows the use of certificates issued by different certification services. The order queue 304 is a message queue in which the order received from the purchase order communication layer 204 of the software module of the buyer 20 is stored before being processed by the order forwarder 302.

In addition, the order forwarder 302 in the intermediary 30 performs the following process.

1. First, the order forwarder 302 fetches an order from the order queue 304.

2. Next, check the certificate digital signature of the order form.

3. In the payment processing, the payment information is parsed and processed through the payment gateway 306.

4. Deliver the order to the seller (10). The order delivery method is delivered online or offline according to the seller 10's needs.

Here, the payment supporter 306 supports a credit card, electronic money, money transfer, etc. using a financial value added communication network (VAN).

So far, the first embodiment of the distributed electronic commerce system and method by digital catalog using the public key technology of the present invention has been described. Hereinafter, the second embodiment of the present invention will be described with reference to FIG. . 4 is a configuration diagram illustrating a second embodiment of a distributed electronic commerce system using a digital catalog shown in FIG. 2. In FIG. 4, Digital Rights Management (DRM Technology) is used. In the meantime, digital rights management (DRM) technologies have been developed to support copyright protection and electronic commerce of digital content. Among them, the technology of the US InterTrust company is a structure that can be utilized in the present invention. Looking at the structure, every commerce participant's terminal should have a module called an InterRights Point (IRP) installed, and all IRPs should be registered in a kind of clearinghouse. The content provider sets the rules for using digital content and encrypts it together with the content to create a product containing digital content called DigiBox. Digibox is delivered to content consumers through various digital media such as Web, email, CD, DVD. The content consumer, who has received the content, obtains and uses the usage right from the Clearinghouse. The commerce agency may collect payment information and usage history from the user. Since this entire process applies encryption technology, it is possible to replace the security functions such as non-repudiation confidentiality achieved by using the public key technology in the first embodiment, and the communication mechanism between the IRPs can be utilized in the present invention as it is. The IRP registration process can also be regarded as the registration of buyers and sellers. In this embodiment, the Internet is used as the communication network between the buyer, the seller, and the intermediary, and the DRM-enabled PC capable of internet connection is used as the information terminal. In the present invention, the basic format of the digital catalog is the same as the first embodiment, but is reprocessed in the form of a digital box of Intertrust. That is, it provides multimedia information about the product as an HTML file and receives the purchased item information (quantity, options, price) and delivers it to the software module (S / W Module) of the buyer 20. The method of displaying purchased item information in the digital catalog is determined by the seller. The broker 30 delivers an order including the purchase item information to the seller 30 in a manner in which the buyer 20 opens the digital catalog to view and make a purchase decision. Hereinafter, detailed configurations and operations of the seller 10, the buyer 20, and the intermediary 30 of FIG. 4 will be described.

First, a buyer software module (S / W Module) stored in the buyer terminal of the buyer 20 is an authorization purchase order communication layer 204 'and an EC enabler 202 called IRP (InterRights Point) as its components. ') Is included. The IRP 204 'replaces the public key function (PKI Toolkit), communication layer, and database functions of the first embodiment with an IRP provided by InterTrust. The EC enabler 202 'performs the following operations.

1. The enabler 202 'receives the digital catalog online or offline from the seller 10 via the web, email, CD, etc., through the authorized purchase order communication layer (IRP) 204'. Open a digital catalog in the form of.

2. Display the product information included in the digital catalog on the screen.

3. The enabler 202 ′ of the purchaser 20 generates an order by generating a purchase order, a delivery place, and a payment method.

4. The creation of an Audit Record, which is stored in a database protected by Intertrust's Audit Record format.

5. With the order transfer process, after the buyer confirms that he would send an undelivered order in the protected database of the IRP 204 ', he then forwards it to the intermediary server system to the communication mechanism of the IRP.

Next, the software module (S / W Module) stored on the seller 10 side includes an authorization purchase order communication layer 104 'and an digital catalog publisher 102' called IRP.

As its function, the IRP 104 'replaces the public key operator (PKI Toolkit) of the first embodiment with an IRP of Intertrust. The digital catalog publisher 102 'has basic HTML editing functionality and can import other HTML files. You can create DigiBox, which is free to use.

Finally, the software module stored in the intermediary server system of the second embodiment is a public key manager (303), a clearinghouse (302 ') and a payment gateway (306'). It includes. The public key manager 303 substitutes the public key server function of the first embodiment by using a public key deployment manager 303 of Intertrust. The order forwarder 302 'performs the following operations.

1. Authorization of the purchaser 20 Fetches the order entered through the purchase order communication layer 204 '. In other words, the order is brought into the Usage Clearinghouse and parsed.

2. As the payment processing, payment processing is performed through the payment applicant 306 '.

3. As the order delivery process, delivers the order to the seller (10).

Payment Gateway 306 ′ utilizes a financial VAN to support credit cards, electronic money, and money transfer.

Based on the configuration of the embodiments of FIGS. 3 and 4 described above, referring to FIG. 5, a distributed electronic commerce method using a digital catalog according to the present invention will be described.

As shown in FIG. 5, in the distributed electronic commerce method using the digital catalog of the present invention, commerce participants are initially installed and registered. That is, the seller 10 installs a software module that can register in an intermediary server system and make a digital catalog in a terminal used by the seller, and the buyer 20 registers a software module that can register in an intermediary server system and participate in a purchase. It is installed in its own information terminal (S500). After this initial registration occurs, the seller 10 creates a digital catalog and distributes and delivers the digital catalog to the purchaser 20 through various media such as web, email, CD, DVD, etc. (S510). . The buyer 20 opens a digital catalog at his or her information terminal such as a PC, a web TV, a web phone, and determines a purchase item (S520). Then, the purchaser 20 transmits the purchase item, the delivery information, and the order written payment information to the server of the intermediary 30 through the network (S530). The intermediary 30 processes the payment and delivers the order to the seller 10 (S540). Seller 10 delivers the product selected by the buyer to the buyer 20 (S550). When the broker 30 delivers the goods to the buyer, the broker takes the commission and delivers the remaining price to the seller 10 (S560). Then, the process proceeds to step S510 to repeat the operations of the above-described steps S510 to S560.

So far, the first and second embodiments of the present invention have been described, but compared to the implemented method, the first embodiment is a distributed electronic commerce system using a digital catalog, and a purchase activity occurs at the buyer side, so that payment is made at the intermediary side. In the second embodiment, a digital entitlement technology (DRM) is made for digital copyright protection for digital content commerce, in which a software module stored and operated on the buyer, seller, and intermediary sides is required. It is used as a basic tool for distributed e-commerce. Since the first embodiment is implemented by using a public key, which is a very basic security technology, it is possible to make a purchaser software module having a relatively smaller size than the second embodiment.

6 is a diagram illustrating an example of a digital catalog applied to the present invention. As shown in FIG. 6, the digital catalog is produced through various media such as a web, an email, a CD, a DVD, etc. in a seller terminal, and a document used therein is made of an HTML file. The HTML file contains product information, the seller's electronic signature, certificate, and order form. These digital catalogs are delivered online or offline to the purchaser terminal. When the digital catalog is driven in the purchaser terminal, the display device of the purchaser terminal displays an image of the product, a description of the product, an audio and video clip of the product, a unit price of the product, a quantity, and options. In addition, the seller's certificate and digital signature are displayed. The buyer side opens the digital catalog and decides to purchase a product, and calls out the order form as shown in FIG. 7 to generate an order form. The order includes the item's item, order date, quantity, options, shipping address, payment method, and buyer's electronic signature.

As described above, the distributed electronic commerce system by the digital catalog of the present invention has the following features and advantages as compared to the existing centralized electronic commerce.

1) Transaction conclusion does not occur centrally in the seller's server, but occurs in the buyer's information terminal.

2) Since the transaction is made at the buyer's information terminal and the payment is made at the server of the intermediary, the seller does not need to have a large server for e-commerce.

3) Sellers can sell goods through e-commerce simply by producing and distributing digital catalogs without a server.

4) The seller can use any offline digital media without the need for product information to be transmitted through the network. Therefore, the seller can provide information related to product information such as digital images, audio and video files in the digital catalog. We can put enough without worrying about traffic.

5) Buyers can make e-commerce transactions at their information terminals without connecting or registering at various shopping malls.

6) You can make a purchase decision based on abundant product information.

7) You only need to enter your basic information, payment information and shipping information once.

Thus, the present invention can deliver a large number of product information to consumers without worrying about communication traffic by using a digital catalog, it is necessary to establish a server on the seller side to make a purchase act on the buyer side and a settlement act on the intermediary side. This can significantly reduce the cost and effort of the seller to build a large-scale electronic commerce system.

Claims (10)

A seller terminal capable of storing and performing a software module capable of creating a digital catalog in its terminal; A buyer terminal capable of storing and performing a software module capable of participating in a purchase in its own terminal; And Register the basics of the seller and the buyer, forward the order sent from the buyer to the seller, receive payment by the payment information described in the order, and when the seller delivers the goods to the buyer, the broker takes commission and pays the rest to the seller. Distributed e-commerce system by a digital catalog comprising a broker server to deliver. The software module of claim 1, wherein the software module stored in the purchaser terminal comprises: a database having a purchaser's basic personal information, a payment method, information on a delivery location, and a storage device for managing a purchase history; Public key operators that provide basic PKI functions such as certificate request, certificate verification, digital signature, digital signature verification, encryption, and decryption; A communication layer for performing encrypted communication with a corresponding server system in a group of intermediary server systems; And A distributed electronic commerce system using a digital catalog, including; an electronic commerce enabler that opens a digital catalog produced and distributed by a seller and sends an order. The system of claim 1, wherein the buyer software module stored in the buyer terminal comprises: an entitlement purchase order communication layer called an InterRights Point (IRP); And an e-commerce enabler that receives the digital catalog online or offline from the seller through web, email, CD, DVD, etc., and opens the digital catalog including the digital contents through an authorized purchase order communication layer (IRP). Distributed e-commerce system by digital catalog. According to claim 1, Software module (S / W Module) stored in the seller terminal provides a basic PKI functions such as certificate request, certificate verification, digital signature, digital signature verification, encryption, decryption, and different authentication services You can import PKI Toolkit, a basic HTML editing function, and other HTML files that allow you to write certificates issued by your organization. You can also import your certificate and your digital signature. A distributed electronic commerce system by digital catalog including a digital catalog publisher (EC Publisher) which makes a digital catalog attached and delivers it to buyers through various media such as web, email, CD, DVD, etc. The software module of claim 1, wherein the software module stored in the seller terminal has an authorization purchase order communication layer called an IRP, and has a basic HTML editing function, and includes a digital catalog issuer capable of importing another HTML file. Distributed e-commerce system by catalog. The software module of claim 1, wherein the software module stored in the intermediary server comprises a certification authority server, a registration authority server, and a directory server to issue certificates to each registered buyer and seller. A public key server for verifying a certificate, informing a public key of an already authenticated person, and receiving external authentication service; A public key operator that provides basic PKI functions such as certificate request, certificate verification, digital signature, digital signature verification, encryption, and decryption, and can write certificates issued by different certification service organizations; An order queue, which is a message queue in which an order received from a purchase order communication layer of a buyer's software module is stored before being processed by an order forwarder; Order forwarder delivering the order to the seller; And a payment supporter using a financial VAN to support credit cards, electronic money, money transfer, and the like. The software module of claim 1, wherein the software module stored in the intermediary server system includes a public key manager (Deployment Manager) that performs a public key server function using a public key manager, a commerce broker and a financial institution. Decentralized e-commerce system using a digital catalog, including; Payment Gateway that supports credit cards, electronic money, and money transfer using VAN. Seller installs a software module on his or her terminal using the software module to register on the intermediary server system and create a digital catalog, and the buyer installs a software module on his information terminal to register on the intermediary server system and participate in the purchase. ; After this initial registration occurs, the seller creates a digital catalog and distributes the digital catalog to buyers through various media such as Web, email, CD, DVD, etc .; The purchaser opens a digital catalog at his or her information terminal such as a PC, a web TV, a web phone, or the like to determine a purchase item; Then, the buyer delivers the order containing the purchase items, shipping information and payment information to the intermediary server through the network; The broker performs payment processing and delivers the order to the seller; Seller delivers the goods selected by the buyer to the buyer; And When the broker delivers the goods to the buyer, taking the brokerage fee and delivers the remaining payment to the seller; Distributed electronic commerce method by a digital catalog comprising a. Seller installs a software module on his or her terminal using the software module to register on the intermediary server system and create a digital catalog, and the buyer installs a software module on his information terminal to register on the intermediary server system and participate in the purchase. ; After this initial registration occurs, the seller creates a digital catalog and distributes and delivers the digital catalog to the buyer through various media such as Web, email, CD, etc .; The purchaser opens a digital catalog at his or her information terminal such as a PC, a web TV, a web phone, or the like to determine a purchase item; Then, the buyer delivers the order containing the purchase items, shipping information and payment information to the intermediary server through the network; The broker performs payment processing and delivers the order to the seller; Seller delivers the goods selected by the buyer to the buyer; And When the broker delivers the goods to the buyer, taking the brokerage fee and delivers the remaining payment to the seller; Distributed electronic commerce method by a digital catalog comprising a. 10. The method of claim 8, further comprising: checking, by the buyer, whether the digital catalog is issued or not tampered with by an authorized seller; The buyer opens the digital catalog to display the product information on the terminal screen; A buyer viewing the displayed product information and determining a purchase item, a receiving place, and a payment method; Buyer issues an order; The buyer makes an electronic signature to prevent the contents of the order from being altered; An order created by the buyer is delivered to the order queue of the intermediary; And forwarding the unsent order to the batch intermediary server system once the buyer wants to send the order form after it is stored in the database. The method of claim 8, wherein the buyer opens a digital catalog received online or offline through a web, email, CD, DVD, etc. from a seller; Displaying product information included in the digital catalog on a screen; Buyer receives a purchase item, a delivery place, a payment method to generate an order; Storing the audit record in a database protected in an audit record format; And forwarding the order to the intermediary server system if the buyer confirms that the undelivered order in the protected database is to be transmitted.