CN110020927A - A kind of open Bidding Methods based on block chain - Google Patents

A kind of open Bidding Methods based on block chain Download PDF

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Publication number
CN110020927A
CN110020927A CN201811513065.0A CN201811513065A CN110020927A CN 110020927 A CN110020927 A CN 110020927A CN 201811513065 A CN201811513065 A CN 201811513065A CN 110020927 A CN110020927 A CN 110020927A
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China
Prior art keywords
tenderer
bidding
bid
block chain
written
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CN201811513065.0A
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Chinese (zh)
Inventor
张思成
张启煊
井皓天
郑泽域
张云飞
董黎刚
蒋献
诸葛斌
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Zhejiang Gongshang University
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Zhejiang Gongshang University
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Priority to CN201811513065.0A priority Critical patent/CN110020927A/en
Publication of CN110020927A publication Critical patent/CN110020927A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/60—Protecting data
    • G06F21/602—Providing cryptographic facilities or services
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/60—Protecting data
    • G06F21/64—Protecting data integrity, e.g. using checksums, certificates or signatures
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q20/00—Payment architectures, schemes or protocols
    • G06Q20/04—Payment circuits
    • G06Q20/06—Private payment circuits, e.g. involving electronic currency used among participants of a common payment scheme
    • G06Q20/065—Private payment circuits, e.g. involving electronic currency used among participants of a common payment scheme using e-cash
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q20/00—Payment architectures, schemes or protocols
    • G06Q20/22—Payment schemes or models
    • G06Q20/28—Pre-payment schemes, e.g. "pay before"
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q30/00—Commerce
    • G06Q30/06—Buying, selling or leasing transactions
    • G06Q30/08—Auctions
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2221/00—Indexing scheme relating to security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F2221/21—Indexing scheme relating to G06F21/00 and subgroups addressing additional information or applications relating to security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F2221/2107—File encryption

Abstract

The invention discloses a kind of open Bidding Methods based on block chain, include the following steps: that tenderer issues the call for tender, information on bidding is written on block chain using the encryption of class Hash；Tenderer obtains information on bidding and obtains wallet address, submits wallet address to tenderer, which is added access sequence and returns to its position id in the sequence by tenderer；Bidding documents, guarantee fund are submitted to tenderer using position id by tenderer；If there is proving material, tenderer is uploaded in third party's document storage system, obtains a storage id, submit this id；5) tenderer parses and encrypts to bidding documents, is written on block chain；6) tenderer submits bidding documents, tenderer after encrypting again within the bid open time and compares with the informative abstract being written on chain before, and ciphertext is identical and meets the bidding documents of entry criteria labeled as effectively bid.The present invention realizes the process optimization under each side visual angle under the premise of guaranteeing that bid process is complete, behavior is effective.

Description

A kind of open Bidding Methods based on block chain
Technical field
The present invention relates to block chain field, a kind of open Bidding Methods based on block chain.
Background technique
It invites and submit bids and purchase cargo, engineering or the details of service is disclosed according to relative program for tenderer, by supplying Quotient or contractor is answered to participate in bidding, both sides are arranged in a manner of contract according to equality, voluntary principle, are adopted in writing Marketing behavior subject to purchase contract.After signing a contract, each side will performance of the contract in accordance with the law, cannot without authorization to contract carry out more Change, or stop, terminate a contract, for tort-feasor, need to generally undertake corresponding responsibility, both sides in fault when, then will be according to mistake Size respectively undertake corresponding responsibility.Invited bidding, competitive bidding are two kinds of main modes of inviting and submitting bids, by purchase requirement And the influence of the factors such as degree of contention.At present in bidding activity, construction unit takes a series of means to protect itself benefit Benefit, but when have a violation operation, for example bright trick is dark fixed, does false bid etc..Tenderer is won victory to compete, it is also possible to be taken Some violation means upset order in the construction market.Some local superintendent offices can not keeping under strict supervision close inspection bidding each side behavior.Study carefully Its reason, be largely that the process of bidding not enough disclose, transparent and data safety it is not high enough, be easy It is distorted.
Li Fei proposes a kind of application of block chain in the management of bidding market achievement, by bidder's performance data and information Record all exists on block chain, makes bidder that can not forge false achievement.But it fakes only for the achievement of bidder, and to trick Unfair, unfair phenomenon that may be present has no idea to be prevented in tendering process.Man Yanxing proposes real using block chain Now invite and submit bids notice information publication storage, in conjunction with the characteristic that block chain data can not distort, keep notice information safer It is credible.But both methods for bid, the assessment of bids, opening of bid, is determined only for a link in bidding links The links such as mark are all without reference to so needing to design one kind can be by block chain technical application to the more polycyclic of bidding and tendering process Section, makes entire bidding process more specification, safety.
Appoint it is big etc. propose a kind of bidding processing method and system based on block chain, make bidding data be difficult to be usurped Change, data time series are able to ensure and data can trace.But still need the artificial assessment of bids when assessment of bids, wherein process cannot Artificial subjective factor is avoided to influence, it is difficult to realize really fair and just.Li Lulu proposes the total of a kind of " block chain+bid " Body framework model is imagined, which is divided into three underlying platform, transaction layer, application layer levels, judging panel's P2P assessment of bids in assessment of bids link It does not interfere with each other, guarantees the objectivity of the assessment of bids to a certain degree.In two above method, assessment of bids link is carried out by judging panel.But It is the assessment of bids is a link important in bidding, artificial assessment of bids result can be influenced by subjective factor, and not can guarantee judging panel Whether link up in advance.So needing to design a kind of completely objective, the assessment of bids, calibration, opening of bid link are completed without using expert judging panel etc. Method, keep result more fair and just.
Freya Sheer Hardwick etc. proposes a kind of method for completing bidding using intelligent contract, and tenderer can To use intelligent contract to complete to upload bidding documents and bid, and it can't see bid profile between tenderer mutually.When having bid Cheng Hou is assessed automatically by computer and is selected best bid and determine winning bidder.But entire bidding and tendering process does not utilize intelligence Contract integration, for example although last assessment of bids link is completed by computer, can guarantee objective and fair.But, the disadvantage is that needing It wants tenderer to start certain computer to complete, does not fully achieve automation.It is therefore desirable to which designing one kind ought effectively submit a tender number Reach requirement and calibration method can be commented automatically after cut-off of submitting a tender.
Summary of the invention
For overcome the deficiencies in the prior art, the object of the present invention is to provide a kind of open bidding sides based on block chain Method.
A kind of open Bidding Methods based on block chain, comprising the following steps:
1) tenderer issues the call for tender, includes following information: project for bidding title, the bid open time, ciphertext submission terminates Time, review standards of designing and entry criteria, value of failing to be sold at auction, guarantee fund, and these information are encrypted to obtain informative abstract using class Hash, This part of informative abstract is written on block chain；
2) tenderer obtains information on bidding and obtains oneself wallet address by block chain, submission wallet address to tenderer, The address is added access sequence and returns to its position id in the sequence by tenderer；
3) bidding documents, guarantee fund are submitted to tenderer using position id by tenderer；
4) if there is proving material, tenderer is uploaded in third party's document storage system, obtains a storage id, mention Hand over this id to tenderer；
5) tenderer is parsed and is encrypted to bidding documents using class Hash encryption method, and obtained informative abstract is written to area On block chain；
6) tenderer submits bidding documents again within the bid open time, tenderer using after the encryption of class hash method and with before The informative abstract comparison on chain is written, ciphertext is identical and meets the bidding documents of entry criteria labeled as effectively bid；
7) effectively bid number is failed to be sold at auction less than value of failing to be sold at auction, and otherwise calculates evaluation criteria compatible degree, compatible degree to every a effectively bidding documents Soprano's acceptance of the bid；
8) tenderer returns the guarantee fund of non-bid winner, collects bid winner guarantee fund；
9) tenderer's confirmation bid winner's bid information is true and after signing a contract, deposit released.
In the step 2), realize that process is as follows:
2.1) after tenderer reads tenderer's information on bidding, to tenderer's application license in the form of under line；
2.2) after tenderer agrees to, array access sequence is written into the wallet address of tenderer；
2.3) tenderer returns to position id of the wallet address of tenderer in the array, then is submitted a tender by informing under tenderer's line Side position id.
Opaque, data that the invention has the following beneficial effects: information can distort, result is easier by subjective factor shadow Sound etc. makes entire bidding field face problems.Data on block chain are open and clear and can not distort, and ensure that number According to safety.Intelligent contract can set certain condition, and when condition is triggered, process executes automatically.The present invention passes through first to be made It with block chain technology by the data cochain of links, guarantees data security, so that disclosing data cannot be tampered, can solve Equity problem caused by certainly the safety problem caused by data are tampered and information are opaque etc..Secondly, the present invention proposes Calibration method is thrown twice, submits ciphertext for the first time, is submitted in plain text for second, verifies whether tenderer modifies bidding documents.It can prevent Only tenderer modifies oneself bidding documents content according to the bidding documents of rival, and prevents internal staff and leak tenderer's bidding documents letter Breath.Finally, the present invention can be automatically performed assessment of bids link using intelligent contract, do not influenced by subjective factor, makes assessment of bids result more Add objective, just.
Specific embodiment
The present invention is further elaborated and is illustrated below with reference to embodiment.The technology of each embodiment is special in the present invention Sign can carry out the corresponding combination under the premise of not conflicting with each other.
A kind of open Bidding Methods based on block chain, comprising the following steps:
1) tenderer issues the call for tender, includes following information: project for bidding title, the bid open time, ciphertext submission terminates Time, review standards of designing and entry criteria, value of failing to be sold at auction, guarantee fund, and these information are encrypted to obtain informative abstract using class Hash, This part of informative abstract is written on block chain；
2) tenderer obtains information on bidding and obtains oneself wallet address by block chain, submission wallet address to tenderer, The address is added access sequence and returns to its position id in the sequence by tenderer；
3) bidding documents, guarantee fund are submitted to tenderer using position id by tenderer；
4) if there is proving material, tenderer is uploaded in third party's document storage system, obtains a storage id, mention Hand over this id to tenderer；
5) tenderer is parsed and is encrypted to bidding documents using class Hash encryption method, and obtained informative abstract is written to area On block chain；
6) tenderer submits bidding documents again within the bid open time, tenderer using after the encryption of class hash method and with before The informative abstract comparison on chain is written, ciphertext is identical and meets the bidding documents of entry criteria labeled as effectively bid；
7) effectively bid number is failed to be sold at auction less than value of failing to be sold at auction, and otherwise calculates evaluation criteria compatible degree, compatible degree to every a effectively bidding documents Soprano's acceptance of the bid；
8) tenderer returns the guarantee fund of non-bid winner, collects bid winner guarantee fund；
9) tenderer's confirmation bid winner's bid information is true and after signing a contract, deposit released.
In the step 2), realize that process is as follows:
2.1) after tenderer reads tenderer's information on bidding, to tenderer's application license in the form of under line；
2.2) after tenderer agrees to, array (access sequence) is written into the wallet address of tenderer；
2.3) tenderer returns to position id of the wallet address of tenderer in the array, then is submitted a tender by informing under tenderer's line Side position id.
Embodiment
The present invention is understood and implemented for the ease of persons skilled in the art, now provides a kind of the method for the invention Specific embodiment.Open Bidding Methods based on block chain take full advantage of the characteristics of block chain intelligence contract and advantage, solution Determined current Bidding Mode the problem of, and current bidding process is improved, to provide a kind of more fair public Positive Bidding Methods.
In the present embodiment, certain company's first is intended through a collection of display of bidding and purchasing.First company uses system publication bid Bulletin, including following information: project for bidding title, bid open time, ciphertext are submitted the end time, value of failing to be sold at auction, guarantee fund, with And the specific requirement to display.Specific requirement is shown in Table 1, and first company stores the file of specific requirement to third party's file system Middle acquisition stores id:89242549883a2ef85dc81b90fb606046.After issuing the call for tender, system determines that weighting is commented Divide formula 1, and provides exclusive intelligent contract for company's first.
Project for bidding title: display buying
Project guaranteed sum: 2000
The project bid time started: 2018-05-15
Ciphertext submits the end time: 2018-05-25
The project bid end time: 2018-06-10
Project minimum bid number: 2
Project specifically describes: 89242549883a2ef85dc81b90fb606046
1. first company of table is to display requirement
1. weighted scoring formula of formula
The specific requirement of first company bid is learnt by the inquiry call for tender by tri- company of A, B, C, it is successively online under to first company It is proposed Request For Bid.First company receives the Request For Bid of three companies, carries out prequalification to three companies respectively, and confirmation has throwing Mark the list of qualification.Finally, A, B, C pass through prequalification, the wallet address of oneself is provided to first company respectively, is shown in Table 2.First After company receives the wallet address of three companies, address is added to access sequence, three companies obtain oneself in access respectively The position id of sequence, and bid qualification is formally obtained, bidding documents can be submitted.The position id of three companies is specifically shown in Table 3.
The wallet address of 2. 3 company of table
Company Wallet address
A 0x578f5d43359ecef7521e590d3565e901f93bd46ab69fe079c48bd8f9e03754cf
B 0xe94fb33455f0b989bb29cfd7787e79067ef19d0277ad604e8c126d468842b0c1
C 0xbc0e6f03439770cfcf7a1ebf9620d788ae5aae0d74646dd824e4e9612fefe43f
The position id of 3. 3 company of table
Company Position id
A 0001
B 0002
C 0003
A, B, C submit respective bidding documents using the position id of oneself respectively before ciphertext submits end cut-off, for the tool of first company Body requirement, every company provides oneself product information and quotation information, is specifically shown in Table 4, table 5, table 6.Three companies submit interior Hold and respectively obtains corresponding ciphertext cryptographic Hash after being encrypted by class Hash.The cryptographic Hash of three companies is shown in Table 7.
4. company A bid content of table
Specific item Size Resolution ratio Refresh metric Brightness Unit price
Bid content 24 1K 60 250 1199
5. B company bid content of table
Specific item Size Resolution ratio Refresh metric Brightness Unit price
Bid content 27 4K 60 350 3299
6. C company bid content of table
Specific item Size Resolution ratio Refresh metric Brightness Unit price
Bid content 24 1K 60 250 789
Table 7 first time ciphertext cryptographic Hash
Company Ciphertext cryptographic Hash
A 151a7e1abc3e1d304fae5adba5c0859d8c4a56e9e61f3aab94ff5cfc
B acaae9e765b378df75c74a8910eddfb8941ebb0427037639bb6cd70a
C dcc41ec6b843f6bb041fd254598d1e0969d8b5c64115baafa2ee2f16
After three companies submit for the first time, bidding documents is submitted second before bid cut-off, every company submits specific Content is shown in Table 8, table 9, table 10.Three companies, second of content submitted equally is used class Hash to encrypt to obtain cryptographic Hash, is had Body is shown in Table 11.By the cryptographic Hash comparison of every company Hash encryption twice, cryptographic Hash is consistent twice and accords with for discovery A with B company The requirement of He Jia company, labeled as effectively bid；And cryptographic Hash is inconsistent twice for C company, shows the content submitted twice not phase Together, it submits a tender labeled as invalid.
8. company A bid content of table
Specific item Size Resolution ratio Refresh metric Brightness Unit price
Bid content 24 1K 60 250 1199
9. B company bid content of table
Specific item Size Resolution ratio Refresh metric Brightness Unit price
Bid content 27 4K 60 350 3299
10. C company bid content of table
Specific item Size Resolution ratio Refresh metric Brightness Unit price
Bid content 24 2K 60 250 789
Second of the ciphertext cryptographic Hash of table 11.
Company Ciphertext cryptographic Hash
A 151a7e1abc3e1d304fae5adba5c0859d8c4a56e9e61f3aab94ff5cfc
B acaae9e765b378df75c74a8910eddfb8941ebb0427037639bb6cd70a
C 8669160f9f4bb9feac7de447a6d4fc97208b394855986e844f21566d
Two company of A, B enters the last assessment of bids stage, and effective bid number is greater than project minimum bid number.Intelligent contract use shifts to an earlier date The bidding documents that the weighted scoring formula set submits two companies is assessed, and respective score is calculated separately out.The assessment of bids is most Scores are shown in Table 12 afterwards.The score of company A is greater than B company, therefore company A is got the bid.First company collects the guarantee of company A automatically Gold returns the guarantee fund of B company, and the result publicity that will call for bid.This bid terminates.
12. final score of table
Company Final score
A 7506.255213
B 3940.588057

Claims (2)

1. a kind of open Bidding Methods based on block chain, which comprises the following steps:
1) tenderer issues the call for tender, includes following information: project for bidding title, the bid open time, ciphertext submission terminates Time, review standards of designing and entry criteria, value of failing to be sold at auction, guarantee fund, and these information are encrypted to obtain informative abstract using class Hash, This part of informative abstract is written on block chain；
2) tenderer obtains information on bidding and obtains oneself wallet address by block chain, submission wallet address to tenderer, The address is added access sequence and returns to its position id in the sequence by tenderer；
3) bidding documents, guarantee fund are submitted to tenderer using position id by tenderer；
4) if there is proving material, tenderer is uploaded in third party's document storage system, obtains a storage id, mention Hand over this id to tenderer；
5) tenderer is parsed and is encrypted to bidding documents using class Hash encryption method, and obtained informative abstract is written to area On block chain；
6) tenderer submits bidding documents again within the bid open time, tenderer using after the encryption of class hash method and with before The informative abstract comparison on chain is written, ciphertext is identical and meets the bidding documents of entry criteria labeled as effectively bid；
7) effectively bid number is failed to be sold at auction less than value of failing to be sold at auction, and otherwise calculates evaluation criteria compatible degree, compatible degree to every a effectively bidding documents Soprano's acceptance of the bid；
8) tenderer returns the guarantee fund of non-bid winner, collects bid winner guarantee fund；
9) tenderer's confirmation bid winner's bid information is true and after signing a contract, deposit released.
2. the open Bidding Methods according to claim 1 based on block chain, which is characterized in that in the step 2) In, realize that process is as follows:
2.1) after tenderer reads tenderer's information on bidding, to tenderer's application license in the form of under line；
2.2) after tenderer agrees to, array access sequence is written into the wallet address of tenderer；
2.3) tenderer returns to position id of the wallet address of tenderer in the array, then is submitted a tender by informing under tenderer's line Side position id.
CN201811513065.0A 2018-12-11 2018-12-11 A kind of open Bidding Methods based on block chain Pending CN110020927A (en)

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CN110458673A (en) * 2019-08-09 2019-11-15 全链通有限公司 Bidding system, equipment and computer readable storage medium based on block chain
CN110751544A (en) * 2019-10-18 2020-02-04 中国联合网络通信集团有限公司 Bidding information, supervision information and bid evaluation information processing method, terminal and system
CN110765211A (en) * 2019-11-06 2020-02-07 腾讯科技（深圳）有限公司 Engineering bid inviting management method, device, terminal and storage medium based on block chain
CN110796447A (en) * 2019-10-22 2020-02-14 全链通有限公司 Electronic bid supervision method and device based on block chain and storage medium
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CN112991027A (en) * 2021-03-30 2021-06-18 青岛海链数字科技有限公司 Bidding information processing method, device, equipment and medium based on block chain
CN113254407A (en) * 2021-05-31 2021-08-13 上海万向区块链股份公司 Bid file storage method, system, medium and device based on block chain
CN113515490A (en) * 2021-05-06 2021-10-19 深圳市地铁集团有限公司 Subway project bidding document whole-course management method and system
CN113706056A (en) * 2021-09-23 2021-11-26 常州市公共资源交易中心 Bidding unit performance identification early warning method, device, equipment and storage medium
CN114422156A (en) * 2022-03-31 2022-04-29 北京国电通网络技术有限公司 Bidding file compensation authentication method and system based on block chain

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CN110458673A (en) * 2019-08-09 2019-11-15 全链通有限公司 Bidding system, equipment and computer readable storage medium based on block chain
CN110751544A (en) * 2019-10-18 2020-02-04 中国联合网络通信集团有限公司 Bidding information, supervision information and bid evaluation information processing method, terminal and system
CN110796447A (en) * 2019-10-22 2020-02-14 全链通有限公司 Electronic bid supervision method and device based on block chain and storage medium
CN110830452A (en) * 2019-10-22 2020-02-21 全链通有限公司 Block chain-based electronic bidding method, device and storage medium
CN110765211A (en) * 2019-11-06 2020-02-07 腾讯科技（深圳）有限公司 Engineering bid inviting management method, device, terminal and storage medium based on block chain
CN110969517A (en) * 2019-11-25 2020-04-07 佰聆数据股份有限公司 Bidding life cycle association method, system, storage medium and computer equipment
CN110969517B (en) * 2019-11-25 2023-02-03 佰聆数据股份有限公司 Bidding life cycle association method, system, storage medium and computer equipment
CN111242738A (en) * 2020-01-10 2020-06-05 中国联合网络通信集团有限公司 Spectrum trading party screening method and device
CN111461851A (en) * 2020-05-22 2020-07-28 烟台大学 Double-blind bidding system and bidding method based on block chain
CN111461851B (en) * 2020-05-22 2023-04-14 烟台大学 Double-blind bidding system and bidding method based on block chain
CN111651795A (en) * 2020-06-09 2020-09-11 吴其震 Bid document disclosing method, system and storage medium based on block chain
CN112116222A (en) * 2020-09-01 2020-12-22 上海康诚建设工程咨询有限公司 Engineering project bid inviting management method, system, terminal equipment and storage medium
CN112257085A (en) * 2020-10-22 2021-01-22 政采云有限公司 Bidding processing method, system, equipment and medium based on block chain
CN112348596A (en) * 2020-11-26 2021-02-09 中国联合网络通信集团有限公司 Bidding and quotation method, system, equipment and storage medium based on block chain
CN112348596B (en) * 2020-11-26 2023-08-11 中国联合网络通信集团有限公司 Bid quotation method, system, equipment and storage medium based on blockchain
CN112702159A (en) * 2020-12-15 2021-04-23 浙江工商大学 Online expert scoring method and system based on block chain
CN112767091A (en) * 2021-01-29 2021-05-07 湖南大学 Method, device and medium for processing supervisable bid and privacy based on block chain
CN112767091B (en) * 2021-01-29 2024-03-01 湖南大学 Block chain-based method, device and medium for processing supervision bidding and privacy
CN112991027A (en) * 2021-03-30 2021-06-18 青岛海链数字科技有限公司 Bidding information processing method, device, equipment and medium based on block chain
CN113515490A (en) * 2021-05-06 2021-10-19 深圳市地铁集团有限公司 Subway project bidding document whole-course management method and system
CN113254407A (en) * 2021-05-31 2021-08-13 上海万向区块链股份公司 Bid file storage method, system, medium and device based on block chain
CN113254407B (en) * 2021-05-31 2023-05-26 上海万向区块链股份公司 Bid and tendered file storage method, system, medium and equipment based on block chain
CN113706056A (en) * 2021-09-23 2021-11-26 常州市公共资源交易中心 Bidding unit performance identification early warning method, device, equipment and storage medium
CN114422156A (en) * 2022-03-31 2022-04-29 北京国电通网络技术有限公司 Bidding file compensation authentication method and system based on block chain

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Application publication date: 20190716