TW202040396A - Online bidding method and online bidding system using the encrypted block chain technology to provide a secured and reliable bidding system - Google Patents

Abstract

The existing bidding websites provide information of outsourcing cases of owners and allows for inquiry for information of the outsourcing cases, but do not offer complete management for processing of the outsourcing cases. In order to improve this shortcoming, the present invention uses the encrypted block chain technology to provide a secured and reliable bidding system and method. In the process of each bidding case, biding operations including announcement, tender acquiring, bid answering, and tendering, bid reviewing, bid opening, and bid awarding are fulfilled completely and reliably.

Description

Online bidding method and online bidding system

The present invention relates to a method and system for protecting computer device components, programs or data to prevent unauthorized behaviors, in particular to a method and system for protecting data access through a platform, such as using a key or controlling access rules , Or methods and systems to ensure the integrity of the user’s information, such as legal verification, verification or signature.

With the high maturity of the development of information technology encryption technology, traditional bidding related operations have gradually been transformed into electronic processing devices (such as computers) for processing, and various encryption technologies have been used to transform into confidential tendering cases. Then conduct bidding, bidding, bid opening and other related operations through the Internet.

However, when the parties concerned perform the above-mentioned related operations through the Internet, the main problem they face is: how to prevent being intercepted and counterfeited by non-party or unauthorized malicious third parties, and further reading and tampering with the relevant content of the bid. Therefore, how to save and disclose the content related to the bid in a safe and reliable manner is one of the main research topics in the current information security technology field. The present invention is based on the existing blockchain tamper-proof mechanism and proposes a security Different practices for storing and disclosing relevant content of the tender.

Therefore, an object of the present invention is to provide an online bidding method that can prevent unauthorized persons from tampering with the content of electronic files.

Therefore, the online bidding method of the present invention is executed by an online bidding system suitable for an original bid, which has an original condition and an original base bid, and the online bidding system includes a bid checking host, and The bidding host communicating with the bid checking host and at least one bidding host communicating with the bid checking host. The bid checking host stores the original bid, multiple account identification codes, and multiple corresponding The public key of the account identification code, a host key, and the host private key corresponding to the host key, and provide multiple private keys corresponding to the public keys, and the bidding host corresponds to the account identifications One of the codes, the at least one bidding host is used to read the relevant information of the original bid.

The online bidding method includes the following:

The bid checking host encrypts the original base bid with the host public key and the public key corresponding to the bidding host to generate an encrypted bid, which has an original condition and an encrypted base bid that does not display the price. .

The bid checking host performs the blockchain conversion on the encrypted bid, and generates a public bid. The public bid has an original condition after the blockchain conversion, and an encrypted background after the blockchain conversion. Mark.

The at least one bidding host reads the public bidding from the bidding checking host, and returns a bidding information to the bidding checking host. The bidding information has a bidding condition corresponding to the original condition converted by the blockchain. And a bid price corresponding to the encrypted base bid that has been converted by the blockchain.

The bid checking host determines whether the public bid read by the at least one bidding host has been tampered with.

In addition, another object of the present invention is to provide an online bidding system that can prevent unauthorized persons from tampering with the contents of electronic documents.

Therefore, the online bidding system of the present invention is suitable for an original bid, which has an original base bid and an original condition. The online bidding system includes a bid checking host, a bidding host, and at least one bidding host.

The bid checking host stores the original bid, multiple account identification codes, multiple public keys corresponding to the account identification codes, a host key, and a host private key corresponding to the host key, and provides Multiple private keys corresponding to the public keys.

The bidding host communicates with the bid checking host and corresponds to one of the account identification codes.

The at least one bidding host communicates with the bid checking host to read relevant information of the original bid.

The bid checking host encrypts the original base bid with the host public key and the public key corresponding to the bidding host to generate an encrypted bid, which has an original condition and an encrypted base bid that does not display the price. .

The bid checking host performs blockchain conversion on the encrypted bid, and generates a public bid. The public bid has an original condition for blockchain conversion and an encrypted base bid after blockchain conversion.

The at least one bidding host reads the public bidding from the bidding reviewing host, and returns a bidding information to the bidding reviewing host. The bidding information has a bidding condition corresponding to the original condition converted by the blockchain. And a bid price corresponding to the encrypted base bid that has been converted by the blockchain.

The bid checking host determines whether the public bid that the at least one bidding host has read has been tampered with.

The effect of the present invention is that when the at least one bidding host reads the public bids generated by the bid checking host and encrypts them with the public key corresponding to the bidding host, and performs block chain conversion, and returns the corresponding After bidding information, the bid checking host verifies the authenticity of the open bid, so as to prevent the unauthorized modification of the content of the open bid by the at least one bidding host.

Referring to Figure 1, the present invention is applicable to an embodiment of the online bidding system of an original bid 2, which is based on the existing blockchain conversion technology and asymmetric encryption mechanism to ensure that the relevant data of the original bid 2 cannot be modified. And confidentiality, the original bid 2 has an original condition 21 and an original base bid 22. The online bidding system includes a bid checking host 3, a bidding host 4, and at least one bidding host 5.

The bid verification host 3 includes a database 31 storing a distributed ledger 32a, a plurality of blockchain host units 33 communicatively connected with the database 31, and a bid verification host storing the original bid 2 Unit 34.

The distributed ledger 32a stored in the database 31 is used to newly record the relevant data of the original bid 2.

The blockchain host units 33 respectively store a copy of the ledger 32b copied in the distributed ledger 32a.

The bid verification host unit 34 stores a plurality of account identification codes 35a, a plurality of public keys 35b corresponding to the account identification codes 35a, and a plurality of private keys corresponding to the public keys 35b ( private key 35c, a host key 36a, and a host private key 36b corresponding to the host key 36a. More specifically, the bid verification host unit 34 uses public-key cryptography, The Asymmetric cryptography mechanism encrypts the original base bid 22 of the original bid 2 and the relevant data provided by the at least one bidding host 5, and cooperates with the bidding host 4 with the corresponding private key 35c and The host private key 36b is decrypted, and the actual operation method will be detailed later.

The bidding host 4 communicates with the bid verification host unit 34, corresponds to one of the account identification codes 35a, and receives the private key 35c issued by the bid verification host unit 34.

It should be noted that the original bid 2 can be set by the bidding host 4 and then transferred to the bid checking host unit 34 for storage, or the bidding host 4 can be connected to the bid checking host. 3. Then the bidding host 4 directly performs the relevant settings of the original bid 2 in the operating environment provided by the bid checking host 3, and then stores it in the bid checking host 3.

The at least one bidding host 5 communicates with the bid checking host 3 to read the relevant information of the original bid 2, and furthermore, the at least one bidding host 5 is connected to the bid checking host 3 of the database 31 to read the relevant content of the original bid 2 recorded in the distributed ledger 32a, and the relevant content is the relevant content generated by the original bid 2 through encryption and blockchain conversion technology Information and specific methods will be further detailed as follows.

Referring to Fig. 2, an online bidding method implemented in this embodiment will be explained, including a base bid encryption step S1, a blockchain conversion step S2, a bidding step S3, a bidding information encryption step S4, a comparison step S5, A bid review step S6, a bid information first decryption step S7, a bid information second decryption step S8, and a bid opening step S9.

The base bid encryption step S1 is that the bid verification host 3 uses the host public key 36a and the public key 35b corresponding to the account identification code 35a of the bidding host 4 to encrypt the original base bid 22 to generate an encrypted bid. Case 6, the encrypted bid 6 has an original condition 61 and an encrypted base bid 62 that does not display the price. With reference to Figure 1, the bidding host 4 can usually be further divided into an undertaking host unit 41 and an audit host The unit 42, each corresponds to one of the account identification codes 35a of the bid checking host unit 34. From the viewpoint of maintaining data security, the purpose of this mechanism is to carry out relevant content of the original bid 2. Double confirmation and protection, in order to be closer to specific business applications, the subsequent description of the bidding host 4 will be described with the host host unit 41 and the audit host unit 42.

With reference to Figure 3, in more detail, in the base label encryption step S1, the bid verification host unit 34 sequentially uses its own corresponding public key (that is, the host public key 36a), the host host unit The public key corresponding to 41 and the public key corresponding to the auditing host unit 42 encrypt the original base mark 22 of the original bid 2, thereby generating the encrypted bid 6, where the original encrypted bid 6 is The condition 61 is the original condition 21 of the original bid 2, and the encrypted base 62 of the encrypted bid 6 is the ciphertext data corresponding to the original base 22 encrypted.

Referring again to Figure 2, the blockchain conversion step S2 is that the bid verification host 3 performs the blockchain conversion on the encrypted bid 6 to generate a public bid 7, which has a passing blockchain The original condition 71 of the conversion, and an encrypted base 72 converted by the blockchain.

To further illustrate, in this step, the bid check host unit 34 newly writes the encrypted bid 6 to the distributed ledger 32a in the database 31, so that the encrypted bid 6 Converted into the public bid 7 (the public bid 7 is the content of the encrypted bid 6 presented in the distributed ledger 32a), the original condition 71 of the public bid 7 is the encrypted bid 6 of the original conditions 61, the encrypted base 72 of the public bid 7 is the encrypted base 62 of the encrypted bid 6, and then each blockchain host unit 33 writes the public bid 7 according to To update the corresponding stored copy of the account 32b, even if the respective account copy 32b is written into the public bid 7, so that the public bid 7 (that is, the encrypted bid 6) Distributedly stored in each block chain host unit 33, the feature of this mechanism is that the data of the distributed ledger 32a is added to the data to be updated in a running account, rather than directly changing the original record The content of each blockchain host unit 33 is synchronously copied to its respective account copy for update. Therefore, even if the content of the original record of the distributed account is rewritten, through the comparison of each blockchain host unit 33, It can be found at any time to ensure that the data cannot be modified.

It should be further explained that, in conjunction with Figure 4, the blockchain conversion mechanism adopted in this embodiment is to generate new data through hash function operations with the data blocks to be added together with the data blocks of the distributed ledger (Figure The hash code 1) shown in 4, when additional data is to be added later (for example: data block 2,..., data block N+1), the addition is made in this way. In addition, in this embodiment The bid checking host unit 34 can also select all or part of the stored host public key 36a, the host private key 36b, the public keys 35b, and the private keys 35c, and encrypt or unencrypt them. It is written in the distributed ledger 32a to prevent tampering by unauthorized persons, to further ensure the security of data encryption, and to solve the problem of storage and management of public keys.

2 again, then the bidding step S3 is that the bidding host 5 reads the original conditions 71 of the public bidding 7 from the database 31, and returns a bidding information 8 to the bidding checking host unit 34 for processing For bidding, the bid information 8 has a bid condition 81 corresponding to the original condition 71 converted via the blockchain, and a bid price 82 corresponding to the encrypted base bid 72 converted via the blockchain.

With reference to Fig. 5, the bid information protection step S4 is that the bid review host unit 34 uses the host public key 36a, the public key 35b corresponding to the undertaking host unit 41, and the public key 35b corresponding to the audit host unit 41, Encrypt the bid price 82 in sequence to generate an encrypted bid information 9. The bid checking host unit 34 then additionally writes the encrypted bid information 9 into the distributed ledger 32a, and each block chain host unit 33. According to the distributed ledger 32a written in the encrypted bid information 9, the respective account copies 32b are updated, wherein the encrypted bid information 9 has a bid condition 91 and an encrypted bid with no price displayed. Price 92, the bid condition 91 of the encrypted bid information 9 is the bid condition 81 of the bid information 8, and the encrypted bid price 92 of the encrypted bid information 9 is the bid price 82 of the bid information 8 The corresponding data generated after being encrypted by the bid checking host unit 34. In this step, the bid information 8 is encrypted and blockchain converted to ensure that the bid related information of the bidder (the bid host 5) is not Open and will not be tampered with.

2 again, the comparison step S5 is that the bid checking host unit 34 then judges whether the public bid 7 read by the bidding host 5 has been tampered with according to the blockchain conversion technology, and the judgment method is the same as the area As described in the block chain conversion step S2, the distributed ledger 32a is compared with the data previously recorded in the respective ledger copy 32b through each block chain host unit 33 to determine whether the data has been tampered with.

The bid review step S6 is that after confirming that the data has not been tampered with, the bid checking host unit 34 then judges whether the bid condition 91 of the encrypted bid information 9 meets the original condition 21 of the original bid 2. Generally speaking, The related procedures for bid opening of the bid are mainly to examine whether the bid content (bidding condition 91 of this embodiment) of the bidder (the bidding host 5 of this embodiment) meets the set conditions of the original bid (original condition 21 of this embodiment) In addition, according to actual needs, it can be judged whether the number of eligible bidders meets the set minimum number. If there are no bidders that meet the set conditions of the original bid, or the number of bidders that meet the set conditions is lower than the set minimum number, Then it is determined that this bid is invalid. In this embodiment, to simplify the description, the number of bidding hosts 5 is one, and the minimum number of bidders that must meet the conditions for bid setting is also one.

When the bid review step S6 determines that the original condition 21 of the original bid 2 is met, then the encrypted bid price 91 of the encrypted bid information 9 is decrypted to open the bid, and the decryption is mainly done by the The audit host unit 42, the undertaking host unit 41, and the bid review host unit 34 respectively use the corresponding private key 35c and host private key 36b to make an encrypted bid for the encrypted bid information 9 after a predetermined time (bid opening time) The price 92 is decrypted to be converted into the bid price 82 of the bid information 8, and the bid checking host unit 34 compares the size relationship between the bid price indicated by the bid information and the original base bid, and the decryption process Together with the bid opening, it can be further subdivided into the following three steps (S7, S8, S9), and illustrated in conjunction with Figure 6 and Figure 2.

First is the first decryption step S7 of the bid information: the bidding auditing host 42 and the undertaking host unit 41 respectively decrypt the encrypted bid price 92 of the encrypted bid information 9 after a predetermined time with the corresponding private key 35c.

Next is the second decryption step S8 of the bid information: the bid verification host unit then uses the host private key to decrypt the bidding audit host 42 and the undertaking host unit 41 to decrypt the encrypted bid information 9 as a third Decryption to convert the encrypted bid information 9 into the bid price 82 of the bid information 8.

Next, in the bid opening step S9, the bid checking host unit 34 compares the size relationship between the bid price 82 indicated by the bid information 9 and the original base bid 22. It should be noted that, in conjunction with FIG. 7, in this step , The bidding auditing host 42, the undertaking host unit 41, and the bidding reviewing host unit 34 each use the corresponding private key 35c, the private key 35c, and the host private key 36b for the public bid 7 The encrypted base bid 72 is decrypted to convert the original bid 2 with the original base bid 22 for the bid checking host unit 34 to perform bid price comparison.

Referring to Figure 8, this embodiment is another form of specific application. The overall online bidding system also includes a bank transaction server 11a, an electronic invoice server 11b, and a clearing house server 11c. The bidding network server 11d corresponds to the aforementioned bid checking host 3, the bidder 11e corresponds to the aforementioned bidding host 4, and the supplier 11f corresponds to the aforementioned bidding host 5.

The bank transaction server 11a has a bidding project account, which is used when the supplier 11g pays the pledged money online.

The electronic invoice server 11b is used to collect service fees (for example, when the bidding contractor 11e sets a bid on the bidding network server 11d, or the supplier 11f pays the deposit), it is used to issue electronic invoices .

The clearing house server 11c is for inquiring whether the tenderer 11e (or the aforementioned bidding host 4) and the supplier 11g (or the aforementioned bidding host 5) have any refund records.

The bidding network server 11d is a website server that provides the bidder 11e (including its bid contractor and bid auditor) and the supplier 11f to complete the bidding operations. In addition, for each bidding case, its bidding There can be zero or more auditors.

It should be noted that this specific application form also provides functions such as online real-time bargaining, bidding project account, and refund record query. The three functions are described below.

Online real-time bargaining function: When the bid amount is higher than the base price of the contract and the bid cannot be awarded, the bidding contractor of the tenderer 11e can choose to stream the bid or use the online real-time bargaining message function to send a request to the supplier 11f with the lowest base price Price reduction. If the bidding contractor agrees to the bid amount after the price reduction, the supplier 11f will win the bid. If the bidding contractor disagrees with the bid amount after the price reduction, then ask the next lowest price reduction until the price reduction is agreed. The bid amount or bid rejection.

Tender project account function: It can be further divided into the following four points for explanation.

(A) The bank's transaction server 11a has a bidding project account, which is used when the supplier 11f pays the deposit.

(B) When the bid is awarded, the bid deposit will be returned to the unsuccessful supplier 11f. If the winning supplier 11f fails to sign a contract with the tenderer 11e, the bid deposit will be transferred after deducting the service fee. Remit it to the tenderer 11e. If the winning supplier 11f completes the contract with the tenderer 11f, after being notified by the tenderer 11e, the bid deposit will be refunded to the winning supplier 11f after deducting the service fee.

(C) When the bid is cancelled, the bid deposit paid by supplier 11f shall be returned to supplier 11f after deducting the handling fee.

(D) When the project starts, a bidding project account is generated in the bank's transaction server 11a.

Refund record query function: The bidding network server 11d can query the clearing house server 11c for the supplier 11f/tenderer 11e for refund records. If the refund record is found, the bidding or bidding of the supplier 11f/tenderer 11e will be stopped Function, when the refund record is cleared, it will be restored.

To sum up, the above embodiment uses the online bidding platform to sequentially encrypt and convert the original base bid of the original bid with the corresponding public key, and then use the blockchain conversion technology to add the corresponding data and store it in the distributed And allow the blockchain host units to update to their respective copy of the account. When the public bid is read by the bidding host from the database, if it is tampered with, it can be accessed through the copy of the account The comparison found that in order to maintain the security of the data, it can indeed achieve the purpose of the invention.

However, the above are only examples of the present invention. When the scope of implementation of the present invention cannot be limited by this, all simple equivalent changes and modifications made in accordance with the scope of the patent application of the present invention and the content of the patent specification still belong to Within the scope of the patent for the present invention.

2: Original bid 21: Original conditions 22: Original base standard 3: Bid verification host 31: Database 32a: Decentralized ledger 32b: A copy of the ledger 33: Blockchain host unit 34: Bid verification main unit 35a: account identification code 35b: Public key 35c: private key 36a: host public key 36b: host private key 4: Bidding host 41: Host unit 42: Audit host unit 5: Bidding host 6: Encryption tender 61: Original conditions 62: Encrypted base standard 7: Public bidding 71: original condition 72: Encrypted base standard 8: Bidding information 81: Bid conditions 82: bid price 9: Encrypted bidding information 91: Bid conditions 92: Encrypted bid price S1: Bottom standard encryption step S2: Blockchain conversion steps S3: Bidding steps S4: Steps to encrypt bid information S5: Comparison steps S6: Steps for bid review S7: The first decryption step of bid information S8: The second decryption step of bid information S9: Bid opening steps 11a: Bank transaction server 11b: Electronic invoice server 11c: Clearing house server 11d: Bidding Network Server 11e: Tenderer 11f: Supplier

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, in which: Figure 1 is a block diagram illustrating an embodiment of the online bidding system of the present invention; Figure 2 is a flowchart illustrating the online bidding method implemented by this embodiment; Figure 3 is a schematic diagram to assist in explaining a reserve price encryption process regarding the online bidding method; Figure 4 is a schematic diagram to assist in explaining the blockchain protection data mechanism adopted in this embodiment; Figure 5 is a schematic diagram to assist in explaining a bidding amount encryption process regarding the online bidding method; Figure 6 is a schematic diagram to assist in explaining a bidding amount decryption process regarding the online bidding method; Figure 7 is a schematic diagram to assist in explaining a reserve price decryption process regarding the online bidding method; and Fig. 8 is a schematic diagram to assist in explaining the specific business application architecture of this embodiment.

2: Original bid

21: Original conditions

22: Original base standard

3: Bid verification host

31: Database

32a: Decentralized ledger

32b: A copy of the ledger

33: Blockchain host unit

34: Bid verification main unit

35a: Account ID

35b: Public key

35c: private key

41: host unit

42: Audit host unit

5: Bidding host

6: Encryption tender

61: Original conditions

62: Encrypted base standard

7: Public bidding

71: original condition

72: Encrypted base standard

8: Bidding information

81: Bid conditions

82: bid price

36a: host public key

36b: host private key

4: Bidding host

9: Encrypted bidding information

91: Bid conditions

92: Encrypted bid price

Claims (10)

An online bidding method, which is executed by an online bidding system suitable for an original bid, the original bid has an original condition and an original base bid, the online bidding system includes a bid check host, and a bid check check The bidding host connected by the host communication, and at least one bid host communicating with the bid checking host. The bid checking host stores the original bid, multiple account identification codes, and multiple corresponding account identification codes. The public key of the host, a host key, and the host private key corresponding to the host key, and provide multiple private keys corresponding to the public keys, and the bidding host corresponds to one of the account identification codes 1. The at least one bidding host is used to read the relevant information of the original bid, and the online bidding method includes: The bid checking host encrypts the original base bid with the host public key and the public key corresponding to the bidding host to generate an encrypted bid, which has an original condition and an encrypted base bid that does not display the price; The bid checking host performs a blockchain conversion on the encrypted bid to generate a public bid, which has an original condition for the blockchain conversion and an encrypted base bid after the blockchain conversion; The at least one bidding host reads the public bidding from the bidding checking host, and returns a bidding information to the bidding checking host. The bidding information has a bidding condition corresponding to the original condition converted by the blockchain. And a bid price corresponding to the encrypted base bid converted by the blockchain; and The bid checking host determines whether the public bid that the at least one bidding host has read has been tampered with. For the online bidding method described in claim 1, the bid checking host includes a database storing a distributed ledger, a plurality of communication links with the database, and storing a copy of the distributed ledger respectively A copy of the blockchain host unit and a bid verification host unit, of which, The bid checking host unit newly writes the encrypted bid to the distributed ledger in the database, so that the encrypted bid is converted into the public bid, and each blockchain host unit is based on the A copy of the account corresponding to the distributed account update written in the encrypted bid. According to the online bidding method described in claim 1, the bid checking host includes a plurality of blockchain host units and a bid checking host unit, and each blockchain host unit stores a ledger loaded into the public bid A copy, wherein the bid checking host unit judges whether the public bid read by the at least one bidding host has been altered according to the account copy stored in at least one of the blockchain host units. For the online bidding method described in claim 1, the bid checking host further includes a database storing a distributed ledger, a plurality of communication links with the database, and storing a copy of the distributed ledger. The blockchain host unit of a copy of the ledger and a bid verification host unit, and the online bidding method also includes: The bid checking host unit encrypts the bid price with the host public key and the public key corresponding to the bidding host to generate encrypted bid information, the encrypted bid information has a bid condition and an encrypted bid price that does not display the price Amount; and The bid checking host unit newly writes the encrypted bid information into the distributed ledger, and each blockchain host unit updates the corresponding stored account according to the distributed ledger written with encrypted bid information copy. For the online bidding method described in claim 1, the bid verification host further includes a bid verification host unit, and when the bid verification host unit determines that the bidding condition of the encrypted bid information meets the original bid Condition, the bidding host and the bid checking host unit respectively decrypt the encrypted bid price of the encrypted bid information with the corresponding private key and host private key after a predetermined time to convert it into the bid price of the bid information , The bid checking host unit compares the size relationship between the bid price indicated by the bid information and the original base bid. An online bidding system, suitable for an original bid, which has an original base bid and an original condition. The online bidding system includes: A bid verification host stores the original bid, multiple account identification codes, multiple public keys corresponding to the account identification codes, a host key, and a host private key corresponding to the host key, and Provide multiple private keys corresponding to the public keys; A bidding host, which communicates with the bid checking host and corresponds to one of the account identification codes; and At least one bidding host communicates with the bid checking host to read relevant information of the original bid, The bid checking host encrypts the original base bid with the host public key and the public key corresponding to the bidding host to generate an encrypted bid, which has an original condition and an encrypted base bid that does not display the price. , The bid checking host performs a blockchain conversion on the encrypted bid to generate a public bid, which has an original condition for the blockchain conversion and an encrypted base bid after the blockchain conversion. The at least one bidding host reads the public bidding from the bidding reviewing host, and returns a bidding information to the bidding reviewing host. The bidding information has a bidding condition corresponding to the original condition converted by the blockchain , And a bid price corresponding to the encrypted base bid after the blockchain conversion, The bid checking host determines whether the public bid read by the at least one bidding host has been tampered with. The online bidding system according to claim 6, wherein the bid checking host includes a database storing a distributed account book, a plurality of communication links with the database, and storing a copy of the distributed account book respectively The blockchain host unit of the copy of the account, and a bid checking host unit, which newly writes the encrypted bid to the distributed ledger in the database, and makes the encryption The bid is converted into the public bid, and each blockchain host unit updates the corresponding stored copy of the account according to the distributed ledger written into the encrypted bid. The online bidding system according to claim 6, wherein the bid verification host includes a plurality of blockchain host units, and a bid verification host unit, and each blockchain host unit stores one and loads the public bid The bid checking host unit judges whether the public bid read by the at least one bidding host has been tampered according to the account copy stored in at least one of the blockchain host units. The online bidding system according to claim 6, wherein the bid checking host includes a database storing a distributed account book, a plurality of communication links with the database, and storing a copy from the distributed account book respectively The blockchain host unit of the copy of the account book, and a bid verification host unit, The bid checking host unit encrypts the bid price with the host public key and the public key corresponding to the bidding host to generate encrypted bid information, the encrypted bid information has a bid condition and an encrypted bid price that does not display the price amount, The bid checking host unit newly writes the encrypted bid information into the distributed ledger, and each blockchain host unit updates the corresponding stored account according to the distributed ledger written with encrypted bid information copy. The online bidding system according to claim 6, wherein the bid checking host includes a bid checking host unit, and when the bid checking host unit determines that the bidding condition of the encrypted bid information meets the original bid of the original bid Condition, the bidding host and the bid checking host unit respectively decrypt the encrypted bid price of the encrypted bid information with the corresponding private key and host private key after a predetermined time to convert it into the bid price of the bid information , The bid checking host unit compares the size relationship between the bid price indicated by the bid information and the original base bid.

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