KR20170067408A

KR20170067408A - Method and apparatus for bidding based on network

Info

Publication number: KR20170067408A
Application number: KR1020150174054A
Authority: KR
Inventors: 박대원
Original assignee: 박대원; (주)원텍
Priority date: 2015-12-08
Filing date: 2015-12-08
Publication date: 2017-06-16

Abstract

A network-based bidding method and apparatus are disclosed. The network-based bidding method includes the steps of sending a bid notification to the plurality of bidder devices based on the encrypted bid information received from the seller's seller device by the bid server, and transmitting the bid notification to the plurality of bidder devices Claims: What is claimed is: 1. A method comprising: receiving request information; requesting retransmission of bid information and bid request information to each of the seller device and a plurality of bidder devices after a bid period has elapsed after the bid server has elapsed; As a successful bidder.

Description

[0001] The present invention relates to a network-based bidding method and apparatus,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bidding method and apparatus, and more particularly, to a network-based bidding method and apparatus.

Modern society is an information society based on the diffusion of computers and the rapid development of networks. Public offices and companies are carrying out basic business and various document processing quickly through computer, internet and e-mail. Many services related to the Internet are being researched and provided in everyday life. Examples include e-commerce, e-voting, secure e-mail, Internet mail-order sales, and e-bidding.

Electronic bidding can be done via the Internet by digitizing the existing bidding process. Current bidding schemes are being implemented in a wide variety of ways, depending on their use and nature. A good example would be to bid for construction of a complex building, to sell a shop, and to bid for art and general goods. Of course, there are various types of bidding methods, but for these various kinds of bidding, e-bidding method composed of factors such as bidder, server, and bidder can be considered.

In the e-bidding system, the bidders can specify the requirements and the internal price of the announcement at the time of bidding announcement, and when the bidders create the specifications and the optimum price or maximum / minimum price is calculated, the bidding can be performed automatically .

KR 10-2009-0089492

One aspect of the invention provides a network-based method of bidding.

Another aspect of the invention provides a network-based bidding device.

A network-based bidding method according to one aspect of the present invention includes the steps of transmitting a bid notification based on encrypted bid information received from a seller's seller device to a plurality of bidder devices, Wherein the bid server is configured to receive the bid request information encrypted based on the digital signature and to request the retransmission of the bid information and the bid request information to each of the seller apparatus and the plurality of bidder apparatuses after the bid deadline The bid server verifies the identity of at least one of the plurality of bidders corresponding to the plurality of bidder devices based on the bid information and the bid request information that have been verified as being identical, , The bidding server determining whether the bidding server And a bidder server for generating a sales contract electronic document for a sales contract based on the bid notification and transmitting the sale contract electronic document to the seller device, Transmitting the electronic document to the resolver device, authenticating the digital signature based on the digital signature, and storing the digital signature in the database, wherein the bid information includes information on a desired price to sell, a bid range, and a bid method, The request information may include information on the bid price.

The bidder is at least one bidder who presents an optimal price for the bid announcement, and the optimal price is a bid price closest to the desired sale price among the bid prices within the bid range included in the bid range, The bid price is the lowest price among the bid prices within the bidding range, the price closest to the average of the bid prices within the bid range, the range where the closest price is larger than the average bid price in the bid range, A price included in a range that is larger than the average of the bid prices in the auction range or smaller than the average of the auction prices within the auction range, and, when the auction range is not set, The nearest price is the price closest to the average of the bid price A range larger than the average and a range smaller than the average of the bid price, a range larger than the average of the bid price or a price falling within a range smaller than the average of the bid price.

The bid server transmits the bid notification to a plurality of guarantee company devices. The bid server receives a plurality of encrypted guarantee information from the plurality of guarantee company devices, The bidding server verifying the identity by requesting retransmission of the plurality of encrypted guarantee information to the plurality of assurance enterprise devices after the expiration of the set bidding deadline, Determining at least one guarantee company among a plurality of guarantee companies corresponding to the plurality of guarantee company apparatuses as a winning bidder for the bid notification on the basis of the guarantee information of the winning bidder, If the bid price of the successful bidder is higher than the bid price of the successful bidder, For it may include performance guarantees and steps to proceed with the contract procedure for warranty repair defects.

The bid server may set a document owner apparatus, a document viewer apparatus, and a document authenticity checking apparatus for a bid request electronic document based on the bid request information and the sales contract electronic document,

Wherein the document owner device performs setting and digital signing of a document retrieval key for the bid request electronic document and the sales contract electronic document, and the document browsing device, when the document retrieval key is set, The document authenticating device acquires the document retrieving key from the resolver device to browse the bid request electronic document and the sales contract electronic document, and the document authenticity checking device obtains a digital signature after verifying authenticity of the bid request electronic document and the sales contract electronic document Based authentication.

In addition, the winning bidder is at least one guarantor who presents an optimal price for the bid announcement, and the optimal price is the first filtered bid price included in the bid range and higher than the winning bid price A price closest to the desired selling price, a lowest price of the first filtered bid price, a price closest to an average of the first filtered bid price, the closest price being the price of the first filtered bid price A range that is larger than the average of the first filtered bid price or a range that is smaller than the average of the bid price within the range, If the bid range is not set, the average of the second filtered bid price higher than the bid price And if the closest price is in a range that is greater than the average of the second filtered bid price and less than the average of the second filtered bid price, then the average of the second filtered bid price Or a price included in a range that is smaller than the average of the second filtered bid price.

A bid server for network based bidding according to another aspect of the present invention includes a processor for sending a bid notification based on encrypted bid information received from a seller's seller device to a plurality of bidder devices Wherein the bid server receives encrypted bid request information based on a digital signature from the plurality of bidder devices and transmits the bid information and the bid information to each of the seller apparatus and the plurality of bidder apparatuses after the bid deadline Wherein the bidding server verifies the identity by requesting retransmission of each of the bid request information, and the bid server transmits at least one of a plurality of bidders corresponding to the plurality of bidder devices based on the bid information and the bid request information, The bidder is determined to be the successful bidder for the bid announcement And the bid server transmits winning bid information indicating winning bid for the bid notification to the winning bidder of the winning bidder, and the bid server generates a sales contract electronic document for the sales contract based on the bid notification, , The electronic document is transmitted to the successful bidder device and the document authenticity checker device, and authenticated based on the digital signature and stored in the database. The bid information may include information on a desired price to sell, a bid range, And the bid request information may include information on a bid price.

The processor transmits the bid notification to a plurality of guarantee company devices, and receives a plurality of encrypted guarantee information from the plurality of guarantee company devices, wherein the guarantee information includes information on a guarantee price, After the expiration of the bid deadline, requesting retransmission of the plurality of encrypted assurance information to the plurality of assurance enterprise apparatuses to verify their identity, and verifying the identity of the plurality of assurance enterprise apparatuses Of the winning bidder is determined as the winning bidder for the bid announcement, and if the winning bidder of the winning bidder is higher than the winning bidder price of the winning bidder, And to proceed with the contract procedure for the defect repair warranty.

In addition, the processor may be configured to set a document owner apparatus, a document viewer apparatus, and a document authenticity checker apparatus for a bid request electronic document based on the bid request information and the sales contract electronic document, Wherein the setting of the document reading key and the digital signature of the bid request electronic document and the sales contract electronic document are performed, and when the document reading key is set, the document browsing device transmits, to the document owner or the document authenticity checker device, The document authenticity checker device authenticates the bid request electronic document and the sales contract electronic document after authenticating the electronic signature of the bid request document and the sales contract electronic document by acquiring the document access key, can do.

When a network-based bidding method and apparatus according to an embodiment of the present invention is provided, the seller and the bidder can easily, quickly, and accurately perform bidding procedures based on bidding information / bid request information that enhances security and improves accuracy through re- .

1 is a conceptual diagram illustrating a network-based bidding method according to an embodiment of the present invention.
2 is a conceptual diagram illustrating an electronic bidding method according to an embodiment of the present invention.
3 is a conceptual diagram illustrating an electronic bidding method according to an embodiment of the present invention.
4 is a conceptual diagram showing a bid server for an electronic bidding according to an embodiment of the present invention.
5 is a conceptual diagram illustrating a method of providing bid announcement information according to an embodiment of the present invention.
6 is a conceptual diagram illustrating a bid range setting function according to an embodiment of the present invention.

The following detailed description of the invention refers to the accompanying drawings, which illustrate, by way of illustration, specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It should be understood that the various embodiments of the present invention are different, but need not be mutually exclusive. For example, certain features, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the invention in connection with an embodiment. It is also to be understood that the position or arrangement of the individual components within each disclosed embodiment may be varied without departing from the spirit and scope of the invention. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the present invention is to be limited only by the appended claims, along with the full scope of equivalents to which such claims are entitled, if properly explained. In the drawings, like reference numerals refer to the same or similar functions throughout the several views.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the drawings.

1 is a conceptual diagram illustrating a network-based bidding method according to an embodiment of the present invention.

1, an electronic bidding method through networking between a user device (hereinafter referred to as a bidder device 100) of a bidder (goods purchaser, a bidder), a user device (seller device) 120 of a seller of the goods, and a bid server 140 .

Referring to FIG. 1, the seller apparatus 120 can digitally sign the contents of a notice for bid via authentication, and transmit the digital signature to the bid server 140. The bidding server 140 may start the announcement contents including the bid information received from the seller apparatus 120 to the bidder apparatus 100. [ For example, the bid information may include information on a bid price (or bid price), a winning bid (or a bid range), a winning bid (or a bid method), and the like. The portion of the bidding information that needs to be encrypted is encrypted, and the portion of the bidding information that is not required to be encrypted may be transmitted to the bid server 140 without being encrypted. The bid server 140 may store the bid information in a database.

The bidder who receives the contents of the announcement through the bidder apparatus 100 can perform the bid procedure. The bidder may send the bid request information to the bid server 140 through the bidder apparatus 100. [ The bid request information includes information on the bid price to be bid by the bidder, and the bid request information may be encrypted and stored in the bid server. The bid server 140 may store the bid request information in a database.

The bidding server 140 sets a predetermined period of time to perform the bidding, and may terminate the bidding if the set time limit expires. When the bid is closed, the seller device 120 resends the encrypted (or non-encrypted) bid information to the bid server 140, and the bidder device 100 sends the bid (or non-encrypted) (140). &Lt; / RTI >

The bidding server 140 receives the encrypted bid information / bid request information transmitted on the bid procedure stored in the database based on the bid verification and processing unit of the bid server 140 and the encrypted bid information / Or encrypted) bidding information / bid request information to determine whether to win or not, and to select at least one bidder as the winning bidder. The bidding server 140 can determine the bidders who are in the auction range among the bidding prices based on the bidding information / bid request information and present the optimal bid price as the successful bidder.

A mutual contract between the seller and the successful bidder is generated as an electronic document, and the seller and the successful bidder can digitally sign the electronic document. In addition, a document authenticity verifier (e.g., a lawyer) can authenticate the generated electronic document, and the authenticated electronic document can be stored in the bid server.

According to an embodiment of the present invention, the optimal bid price may be determined in various ways. For example, the bid price closest to the price offered by the seller among the bid prices suggested by the bidder belonging to the bid range proposed by the seller may be determined as the optimal bid price.

Or the lowest bid price among the bid prices offered by the bidder belonging to the bid range proposed by the seller may be determined as the optimal bid price.

Alternatively, the average value of the bid prices suggested by the bidder belonging to the bid range proposed by the seller may be obtained, and the price closest to the average value may be determined as the optimal bid price. At this time, if the average value of the bid prices proposed by the bidder belonging to the bid range proposed by the seller is obtained and the price closest to the average value is the same, the lower price may be determined as the bid price. On the contrary, when the average value of the bid prices proposed by the bidder belonging to the bid range proposed by the seller is obtained and the price closest to the average value is the same, the high price can be determined as the bid price.

Or if there is no bid range offered by the seller, the average value of all the bid prices offered by the bidder may be obtained, and the price closest to the average value may be determined as the optimal bid price. At this time, if the average value of the bid prices proposed by the bidder belonging to the bid range proposed by the seller is obtained and the price closest to the average value is the same, the lower price may be determined as the bid price. On the contrary, when the average value of the bid prices proposed by the bidder belonging to the bid range proposed by the seller is obtained and the price closest to the average value is the same, the high price can be determined as the bid price.

2 is a conceptual diagram illustrating an electronic bidding method according to an embodiment of the present invention.

In FIG. 2, a method of bidding a guarantee company apparatus through a bid server is disclosed.

Referring to FIG. 2, a plurality of assurance company user devices (hereinafter, assurance company apparatus) 200 registered through authentication may be selected through a bidding procedure through a bidding server 250.

A plurality of the assurance company apparatuses 200 that have been registered through authentication may encrypt the assurance-related information for the announcement started by the seller, and then transmit the assurance-related information to the bid server 250 by digital signature. The warranty related information may include the lowest guaranteed price information. The bid server 250 may store the warranty related information in the database.

When the bidding process by the bidding server 250 is completed, a plurality of assurance companies may retransmit the assurance-related information transmitted to the bidding server before the bidding deadline to the bid server 250 by encrypting / not encrypting them.

The bid server 250 may compare the first guarantee related information received before the bid deadline stored in the database with the second guarantee related information retransmitted after the bid deadline. It can be compared whether the first guarantee related information is the same as the second guarantee related information.

If the bid price of the winning bidder is higher than the guarantee price of the guarantee company, the successful bidder can conclude the contract for the performance guarantee and the repair guarantee for the guarantee company and the related notice and conclude the contract for the announcement. On the contrary, if the bid price of the winning bidder is lower than the guarantee price of the guarantee company, the seller and the successful bidder can conclude a contract for the announcement.

If a guarantor is added, the optimal bid price may be determined in one of the following ways:

The bid price closest to the price suggested by the seller can be determined as the optimum bid price among the bid prices higher than the guarantee price of the guarantee company, while belonging to the bid range proposed by the seller.

Or the lowest bid price among the bid prices belonging to the bid range offered by the seller and higher than the guarantee price of the guarantee company may be determined as the optimal bid price.

Alternatively, the average value of the bid prices higher than the guarantee price of the guarantee company while belonging to the bid range proposed by the seller can be obtained, and the bid price closest to the average value can be determined as the optimal bid price.

Alternatively, if the average value of the bid prices higher than the guarantee price of the guarantor is found while belonging to the bid range proposed by the seller, and the bid price closest to the average value is the same, the lower price may be determined as the optimal bid price.

Or the average value of the bid price higher than the guarantee price of the guarantee company while the seller is within the bidding range and if the average price is closest to the guaranteed price, the higher price may be determined as the optimal bid price.

Or if there is no bid range offered by the seller, the bid price closest to the average value of the bid price of the bid price higher than the guarantee price of the guarantee company may be determined as the optimal bid price.

Or if there is no bid range offered by the seller, if the price closest to the average value of the bid price higher than the guarantee price of the guarantee company is the same, the lower price may be determined as the optimal bid price.

Or if there is no bid range offered by the seller, the highest price may be determined as the optimal bid price if the price closest to the average value of the bid price higher than the guarantee price of the guarantee company is the same.

3 is a conceptual diagram illustrating an electronic bidding method according to an embodiment of the present invention.

3, a method for generating an electronic document on an electronic bidding method is disclosed.

3, an electronic document 300 used for electronic bidding may be generated by authenticating the document owner 310, the document viewer 320, and a document authenticity verifier (e.g., an attorney) have. The document owner 310, the document viewer 320, the document viewer device, and the document authenticity checker 330 may be interpreted as a document authenticity checker device.

The document owner 310 can store the document in the document management server and view the document, but can generate the document viewing key when necessary and perform digital signature.

The document viewer 320 can read the document without having a document view generation key but opens the view key with the help of the document owner 310 or the document authenticity checker (for example, an attorney) 330 if the generated document view key is present You can browse the document, download the document as needed, and print the document.

The document authenticity verifier (e.g., attorney) 330 may authenticate that the document is correct by determining the authenticity of the document and then digitally signing it. Specifically, the document authenticity verifier (e.g., attorney) 330 can verify that the electronic document containing the contents of the electronic contract can be protected by the law after confirming the electronic document, . The document authenticity checker 330 can output the electronic contract when the seller and the successful bidder wish to.

4 is a conceptual diagram showing a bid server for an electronic bidding according to an embodiment of the present invention.

4, the bidding server includes a registration unit 400, a database 410, a database interlocking unit 420, an authentication unit 430, a bid acceptance unit 440, a bid verification and processing unit 450, . &Lt; / RTI > Each component of the bidding server may be implemented to perform operations of the bid server described above with reference to Figs.

The registering unit 400 may be implemented to allow the bidding process to proceed only for sellers, bidders, and guarantors registered for the announcement case, registered seller, bidders, and guarantee companies.

The database 410 may be implemented to manage various information of the registered seller / bidder / guarantee company and information related to the bid business.

The database interworking unit 420 may be implemented to transmit the contents of the database 410 via the Internet.

The authentication unit 430 can be implemented so that the seller / bidder / guarantee company can not be authenticated and the name of another person can not be stolen.

The bid acceptance unit 440 may be implemented by the bidder / guarantor to register their bid price. The bid acceptance unit 440 may be implemented by the bidder / guarantor to modify the bid price. Modifications to bid prices may not be possible.

The bidding verification and processing unit 450 restricts further information from being modified after the bidding is completed, inputs encrypted or unencrypted ticket keys, compares the previously encrypted information with the previously encrypted information, maintains the consistency of the bidding information, And can be implemented to determine whether to win or not.

The processor 460 is implemented to control operations of the registration unit 400, the database 410, the database interlock unit 420, the authentication unit 430, the bid acceptance unit 440, the bid verification and processing unit 450 .

5 is a conceptual diagram illustrating a method of providing bid announcement information according to an embodiment of the present invention.

FIG. 5 illustrates a method of transmitting advertisement information of a seller to a user device based on a user's interest.

Referring to FIG. 5, the bidding server 550 may transmit notification information to the user device 500 in consideration of a user's interest. The bidding server 550 may determine the interest items of interest to the user based on the user's previous search record / previous bid record.

The bidding server 550 may send information about the bidding item to the user device 500 if the item of interest and a similar category of article are advertised by the seller as a bidding item. The information about the bidding item may include the bidding range, the detailed information of the bidding item, the minimum bid price bid deadline, and the like.

The user can receive information on the advertised bidding item from the bidding server 550, determine whether to bid on the bidding item, and proceed with the bidding process.

6 is a conceptual diagram illustrating a bid range setting function according to an embodiment of the present invention.

6 shows an automatic setting function of a bid range for a merchandise of a seller.

Referring to FIG. 6, the bidding range for the article may be directly set by the seller, but may be set by the bidding server.

The bidding server may determine the article in the same / similar range as the seller's article based on the previous bid details (step S600). Thereafter, the bidding server determines the bidding range of the merchandise based on the previous bidding history (step S610).

For example, if the seller intends to sell the TV, the bid server can determine whether the auction result for the same item exists based on the model name of the TV that the user wants to sell.

If there is at least one auction result for the same article based on the model name of the TV, the minimum bid price for the seller's article may be determined based on the auction result, and the bid range may be set.

If the bid server does not have a transaction history for the same article as the seller's article, the bid server can set the bid range of the seller's article based on the previous transaction history of the article in the similar range. The bidding server may search for previous bid records for other goods that were traded at the same price as the seller's goods to determine similar range items. For example, a seller might want to sell a C-model TV of the A brand, but there may not be a sales record of the C-model TV of the A-brand in the previous bid record.

In this case, the bidding server can search for a model of the A-brand C model and the same model. The same-class model may be a product that was sold with a price range similar to that of the A-brand C model of the other brand / other model.

The bidding server sets the similarity range item of the TV model of the C model of the A brand to the similar range item and searches the previous bid history of the TV model of the C model of the A model and the previous bid record of the same model to set the bidding range of the TV of the C model of the A brand .

The bidding server may set the bidding range for the goods of the seller in consideration of the transaction tendency information of the articles having the same category as the article, if the same / similar range of the article is not present based on the previous bidding history have. For example, the bidding server may set the bidding range for the merchandise of the merchant to take into account the information on the yearly depreciation rate for a particular article (e.g., TV), the transaction preference, and the winning price difference based on the article status .

Alternatively, the bidding server may set the bidding range in consideration of the available time limit of the user. Certain users may want to sell goods faster, even if they sell goods cheaper, and others may not want to sell goods quickly, and may want to pay for them. Therefore, when the user requests the quick transaction, the bidding server may set the bidding range lower than the bidding range determined based on the previous transaction details, and proceed the bidding procedure.

Such a network-based bidding method may be implemented in an application or implemented in the form of program instructions that may be executed through various computer components and recorded on a computer-readable recording medium. The computer-readable recording medium may include program commands, data files, data structures, and the like, alone or in combination.

The program instructions recorded on the computer-readable recording medium may be ones that are specially designed and configured for the present invention and are known and available to those skilled in the art of computer software.

Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks and magnetic tape, optical recording media such as CD-ROMs and DVDs, magneto-optical media such as floptical disks, media, and hardware devices specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like.

Examples of program instructions include machine language code such as those generated by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like. The hardware device may be configured to operate as one or more software modules for performing the processing according to the present invention, and vice versa.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined in the appended claims. It will be possible.

Claims

The network-
Transmitting a bid notification based on the encrypted bid information received from the seller device of the seller to the plurality of bidder devices;
The bid server receiving encrypted bid request information based on a digital signature from the plurality of bidder devices;
After the bidding server has set a bid deadline, requesting retransmission of each of the bid information and the bid request information to each of the seller apparatus and the plurality of bidder apparatuses to verify the identity thereof;
Determining at least one bidder among the plurality of bidder devices corresponding to the plurality of bidder devices as a successful bidder for the bid notification based on the bid information and the bid request information for which the bid server verifies the identity;
The bidding server transmitting successful bidder information indicating a winning bid for the bid notification to the successful bidder apparatus of the successful bidder; And
The bid server generates a sales contract electronic document for a sales contract according to the bid notification, transmits the electronic document to the seller device, the auctioneer device and the document authenticity checker device, authenticates based on the digital signature, , &Lt; / RTI >
The bidding information includes information on a desired selling price, a bidding range, and a bidding method,
Wherein the bid request information includes information on a bid price.

The method according to claim 1,
The bidder is at least one bidder who presents an optimal price for the bid announcement,
The optimal price may be,
A bid price closest to the desired selling price among the bid prices within the bidding range included in the bid range among the bid prices;
The lowest price among the bid prices within the bid range;
When the closest price exists in a range that is larger than the average of the bid prices in the bid range and smaller than the average of the bid prices in the bid range, A price included in a range that is larger than the average of the bid price in the bid range or smaller than the average of the bid price in the bid range; And
And when the bid range is not set, a price closest to the average of the bid price is obtained, and if the closest price exists in a range larger than the average of the bid price and smaller than the average of the bid price, A price which is included in a range larger than the average of the prices or smaller than the average of the bid prices,
&Lt; / RTI >

The method according to claim 1,
The bid server transmitting the bid announcement to a plurality of assurance company devices;
The bidding server receiving a plurality of encrypted warranty information from the plurality of guarantee company devices, the guarantee information including information on a guaranteed price;
After the bidding server expires the set bidding deadline, requesting retransmission of the plurality of encrypted guarantee information to the plurality of guarantee company devices to verify identity; And
Determining, by the bidding server, at least one guarantee company among a plurality of guarantee companies corresponding to the plurality of guarantee company apparatuses as a successful bidder for the bidding announcement based on the assurance information of the identities verified;
And if the bid server has a winning bid price of the winning bidder higher than the winning bid price of the winning bidder, proceeding the contracting process for the guarantee for the bid notification and the warranty repair guarantee between the winning bidder and the winning bidder Lt; / RTI >

The method of claim 3,
The bid server establishes a document owner apparatus, a document viewer apparatus and a document authenticity checking apparatus for a bid request electronic document based on the bid request information and the sales contract electronic document,
The document owner apparatus performs setting and digital signature of the document viewing key for the bid request electronic document and the sales contract electronic document,
Wherein the document browsing device acquires the document browsing key from the document owner or the document authenticity checker device to browse the bid request electronic document and the sales contract electronic document when the document browsing key is set,
Wherein the document authenticity checker device authenticates based on a digital signature after authenticity determination of the bid request electronic document and the sales contract electronic document.

5. The method of claim 4,
The winning bidder is at least one guarantor who presents an optimal price for the bid notification,
The optimal price may be,
A price of the bid price closest to the desired selling price among the first filtered bid price included in the bid range and higher than the winning bid price;
A lowest price of the first filtered bid price;
A price closest to the average of the first filtered bid prices and the closest price exists in a range that is larger than the average of the first filtered bid price and smaller than the average of the first filtered bid price A price included in a range that is larger than the average of the first filtered bid price or smaller than the average of the bid price within the range; And
A bid price that is closest to an average of a second filtered bid price higher than the winning bid price if the bid range is not set and the closest price is larger than an average of the second filtered bid price, 2 filtered bid price, a price included in a range that is greater than the average of the second filtered bid price or less than the average of the second filtered bid price,
&Lt; / RTI >

1. A bidding server for network-based bidding,
The bidding server comprising a processor,
The processor sends a bid notification to the plurality of bidder devices based on the encrypted bid information received from the seller device of the seller by the bid server,
Wherein the bid server receives encrypted bid request information based on the digital signature from the plurality of bidder devices,
After the bidding period set by the bidding server has elapsed, requests the resellers and the plurality of bidder devices to retransmit the bid information and the bid request information, respectively,
The bid server determines at least one bidder among the plurality of bidder devices corresponding to the plurality of bidder devices as the winning bidder for the bid notification based on the bid information and the bid request information for which the identities are verified,
The bidding server transmits winning bid information indicating the winning bid for the bid notification to the winning bidder device of the winning bidder,
The bid server generates a sales contract electronic document for a sales contract according to the bid notification, transmits the electronic document to the seller device, the auctioneer device and the document authenticity checker device, authenticates based on the digital signature, However,
The bidding information includes information on a desired selling price, a bidding range, and a bidding method,
Wherein the bid request information includes information on a bid price.

The method according to claim 6,
The bidder is at least one bidder who presents an optimal price for the bid announcement,
The optimal price may be,
A bid price closest to the desired selling price among the bid prices within the bidding range included in the bid range among the bid prices;
The lowest price among the bid prices within the bid range;
When the closest price exists in a range that is larger than the average of the bid prices in the bid range and smaller than the average of the bid prices in the bid range, A price included in a range that is larger than the average of the bid price in the bid range or smaller than the average of the bid price in the bid range; And
And when the bid range is not set, a price closest to the average of the bid price is obtained, and if the closest price exists in a range larger than the average of the bid price and smaller than the average of the bid price, A price which is included in a range larger than the average of the prices or smaller than the average of the bid prices,
Of the bidding server.

The method according to claim 6,
Wherein the processor transmits the bid announcement to a plurality of assurance enterprise devices,
Receiving a plurality of encrypted warranty information from the plurality of guarantee company devices, the guarantee information including information on a guarantee price,
After the expiration of the set bid period, requests a plurality of the assurance enterprise apparatuses to retransmit the plurality of encrypted assurance information to verify the identity,
Determining at least one guarantee company among a plurality of guarantee companies corresponding to the plurality of guarantee company apparatuses as a winning bidder for the bid notification based on the guarantee information that has been verified as being identical,
If the winning bidder of the winning bidder is higher than the winning bid price of the winning bidder, the contracting process for the performance guarantee and the defect repair guarantee for the bid notification is executed between the winning bidder and the winning bidder.

9. The method of claim 8,
Wherein the processor is configured to set a document owner apparatus, a document viewer apparatus, and a document authenticity checker apparatus for a bid request electronic document based on the bid request information and the sales contract electronic document,
The document owner apparatus performs setting and digital signature of the document viewing key for the bid request electronic document and the sales contract electronic document,
Wherein the document browsing device acquires the document browsing key from the document owner or the document authenticity checker device to browse the bid request electronic document and the sales contract electronic document when the document browsing key is set,
Wherein the document authenticity verification device authenticates based on a digital signature after authenticity determination of the bid request electronic document and the sales contract electronic document.

10. The method of claim 9,
The winning bidder is at least one guarantor who presents an optimal price for the bid notification,
The optimal price may be,
A price of the bid price closest to the desired selling price among the first filtered bid price included in the bid range and higher than the winning bid price;
A lowest price of the first filtered bid price;
A price closest to the average of the first filtered bid prices and the closest price exists in a range that is larger than the average of the first filtered bid price and smaller than the average of the first filtered bid price A price included in a range that is larger than the average of the first filtered bid price or smaller than the average of the bid price within the range; And
A bid price that is closest to an average of a second filtered bid price higher than the winning bid price if the bid range is not set and the closest price is larger than an average of the second filtered bid price, 2 filtered bid price, a price included in a range that is greater than the average of the second filtered bid price or less than the average of the second filtered bid price,
Of the bidding server.