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Double-blind bidding and tendering system and method based on block chain

A bidding and blockchain technology, applied in business, equipment, buying and selling/lease transactions, etc., to ensure fairness and transparency, information disclosure, and prevent repeated submission of review information.

Active Publication Date: 2020-07-28
YANTAI UNIV
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AI Technical Summary

Problems solved by technology

[0005] Furthermore, if the review expert information is disclosed to the bidder, the bidder can collect the review expert information of historical projects, and guess the experts participating in the review through data analysis, which may lead to early communication with experts

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  • Double-blind bidding and tendering system and method based on block chain

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Embodiment Construction

[0048] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

[0049] Please refer to figure 1 As shown, it is a schematic structural diagram of the blockchain-based double-blind bidding system of the present invention. The block chain-based double-blind bidding system includes: a main module 1, a bidding module 2, a bidding module 3, an evaluation expert module 4, a supervisor module 5, an agent module 6 and a supervision module 7.

[0050] Use the alliance chain to build the system. This solution chooses hyperledger fabric, enables idemix, and realizes anonymous login of users.

[0051] The system establishes five organizations: the government procurement office belongs to the competent module 5, the bidding agency belongs to the agent module 6, the notary office belongs to ...

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Abstract

The invention discloses a double-blind bidding and tendering system based on a block chain. An alliance chain building system is used and comprises a tendering module, a main module, a bidding moduleand an evaluation expert module, the main module generates a graph G for each specific tendering project, randomly generates a token for each bidding user and each evaluation expert user, performs hash calculation on the token and then stores the token; the bidding user or an evaluation expert user selects own private transformation ni or ni' to generate the same composition Gi or Gi' of the graphG, then a public transformation pi or pi' is selected, Gii or Gii' is generated on the basis of Gi or Gi', and then bidding information M or review information M' comprising pi or pi', Gii or Gii 'isconstructed. Therefore, the function of verifying whether the opposite side is an effective bidding user or an effective evaluation expert on the premise of hiding the real identity of the bidding user or the evaluation expert is realized. The invention further discloses a double-blind bidding and tendering method based on the block chain.

Description

technical field [0001] The present invention relates to the application field of blockchain, in particular to a blockchain-based double-blind bidding system and bidding method. Background technique [0002] With the development of information technology, there are already many electronic bidding platforms based on the network. These platforms have improved the efficiency of public bidding business, making the bidding process more open, transparent and standardized; Implemented through web applications, there is a problem of centralized storage. Once the server is attacked, it will lead to information leakage, or even be tampered with forgery; blockchain is a distributed ledger, which uses consensus mechanism, encryption algorithm and other methods to prevent data from being stolen. tampering or forgery. [0003] At present, there are also blockchain-based electronic bidding designs, but they are limited to using the characteristics of the blockchain to save information in a...

Claims

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Application Information

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IPC IPC(8): G06Q30/08G06Q30/06G06Q30/00
CPCG06Q30/08G06Q30/0611G06Q30/0185
Inventor 赵金东马娜娜程雪王国辉
Owner YANTAI UNIV
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