CN117934129A - Block chain electronic auction method, equipment and storage medium for protecting user privacy - Google Patents
Block chain electronic auction method, equipment and storage medium for protecting user privacy Download PDFInfo
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Abstract
The invention relates to a blockchain electronic auction method, equipment and a storage medium for protecting user privacy, wherein the method comprises the following steps: acquiring auction parameter information, and completing deployment of intelligent contracts; receiving registration information of a new user, and finishing registration of the new user, wherein the registration information comprises user role categories, and the user role categories comprise auction players and auctioneers; receiving zero knowledge range proving information of the deposit from the auction player, and completing deposit delivery; receiving bid information based on petdersen commitments from an auction person who has completed deposit submission, and the bid information is signed by a linkable ring signature; the auctioneer determines the winning auction bidder based on the bidding information of each auction bidder; bid information and zero knowledge range proving information of winning bidders are disclosed and only disclosed. Compared with the prior art, the invention has the advantages of ensuring the privacy of participants in auction, preventing bidders from bidding for multiple times, and the like.
Description
Technical Field
The invention relates to the technical field of blockchain, in particular to a blockchain electronic auction method, equipment and a storage medium for protecting privacy of users.
Background
The rise of the mobile internet has further driven the expansion of this novel form of network auction systems. The popularity of smartphones and mobile devices has brought new user groups and more convenient access to electronic auctions. The explosion of computer networks has led to an increasing growth in online auctions, with the potential to replace off-line auctions, and also to expose clear problems.
Firstly, the performance bottleneck problem of a single authorization center is solved, and for this reason, chinese patent application publication No. CN113362147a discloses a traceable electronic auction method based on multiple authorization centers under the internet of things, which includes five steps of system initialization, verification and generation of auction private keys, bidding, price revealing, and malicious node tracing. During operation, any authority center can generate partial keys, and a core central authority center exists for tracing malicious authority centers. The device enhances the performance of user registration in auction events and has certain anti-malicious robustness, but does not consider the privacy of user identity.
Chinese patent application publication No. CN116029801a discloses a reverse sealed electronic auction method based on blockchain, which includes four stages of contract deployment, bidding, confusion and disclosure, and under working state, the privacy of bidding price is protected by homomorphic encryption and noise confusion, and the operation is efficient, but the true identity of bidders is disclosed externally, and the seller is required to cooperate, so that the intelligent contract can calculate auction winner.
To sum up, there is currently no electronic auction method that can preserve user anonymity while conducting an auction on a chain, and also can resist the repeated bidding problem of the same individual.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a blockchain electronic auction method, equipment and a storage medium for protecting the privacy of users so as to ensure the privacy of participants during auction.
The aim of the invention can be achieved by the following technical scheme:
in one aspect of the present invention, there is provided a blockchain electronic auction method for protecting privacy of a user, comprising the steps of:
Acquiring auction parameter information, and completing deployment of intelligent contracts;
receiving registration information of a new user, and finishing registration of the new user, wherein the registration information comprises user role categories, and the user role categories comprise auction players and auctioneers;
Receiving zero knowledge range proving information of the deposit from the auction player, and completing deposit delivery;
Receiving bid information based on petdersen commitments from an auction person who has completed deposit submission, and the bid information is signed by a linkable ring signature;
the auctioneer determines the winning auction bidder based on the bidding information of each auction bidder;
Bid information and zero knowledge range proving information of winning bidders are disclosed and only disclosed.
As a preferred technical scheme, the auction parameter information includes auction duration, auction population limit, goods to auction attribute and mathematical group for generating public-private key pair.
Preferably, the registration information includes a public key of the user.
As a preferred technical scheme, the method further comprises:
A query request is received from an auction person, and a bid winning result is returned based on the query request, wherein the query request comprises bid information packaged by the public key and a random number bound with a petderson promise.
As a preferred technical solution, the process of determining the winning auction player includes:
based on bid information signed by the linkable ring signature, a first bid of each bidder is selected as a comparison object, and the winning bidder is determined by the comparison.
As a preferred technical solution, before receiving the zero knowledge range proof information of the deposit from the auction player, the method further includes:
Authentication of the auction person is achieved based on pre-acquired and unique biological information.
As a preferred technical solution, at the time of bidding, each auctioneer realizes the determination of the winning auctioneer by sending a secret value of bidding information for opening its own peterson promise on the blockchain, wherein the secret value is encrypted with the public key corresponding to the auctioneer.
As a preferred technical scheme, the method further comprises:
and returning the deposit of the unbiased bidder and executing settlement of the unbiased bidder.
In another aspect of the present invention, there is provided an electronic apparatus including: one or more processors and memory, the memory having one or more programs stored therein, the one or more programs including instructions for performing the blockchain electronic auction method for protecting user privacy described above.
In another aspect of the invention, a computer-readable storage medium is provided that includes one or more programs for execution by one or more processors of an electronic device, the one or more programs including instructions for performing the blockchain electronic auction method described above that protects user privacy.
Compared with the prior art, the invention has at least one of the following beneficial effects:
(1) Guaranteeing privacy of participants in auction: in the bidding process, the auction player signs and transmits bidding information through the linkable ring signature based on the peterson promise, and only the bidding information and the zero knowledge range proving information of the winning bidder are disclosed after bidding, so that the bidding player can be ensured to verify the bidding and deposit of the winning bidder, and the privacy information of other bidding players except the winning bidder is ensured.
(2) Preventing bidders from bidding multiple times: through adopting the mode of the linkable ring signature to transfer the bidding information, each bidder can calculate by self-help by using public keys of other peers, the identity of each bidder is hidden in a group which is at most all bidders, in addition, for the information of the same person, the clue series connection of the information is achieved by using the linkable ring signature, in addition, the bidder can be assisted to lock the action that a single bidder possibly sends multiple bids, and bidding fairness is ensured.
Drawings
FIG. 1 is a flow chart of a blockchain electronic auction method for protecting user privacy in an embodiment;
FIG. 2 is a diagram of annotation of meaning of various types of entities and technical icons in the embodiment;
FIG. 3 is a schematic diagram of an initialization flow of parameters such as deployment and status of an intelligent contract according to an embodiment;
FIG. 4 is a schematic diagram of a process for acquiring active participation qualification through user registration in an embodiment;
FIG. 5 is a schematic diagram of a deposit payment stage in an embodiment;
FIG. 6 is a schematic diagram of a bidder bid phase in an embodiment;
FIG. 7 is a diagram showing a privately-opened price period of an auction player to an auctioneer in an embodiment;
FIG. 8 is a schematic diagram of an auction result disclosure and a winning bidder transaction flow in an embodiment;
fig. 9 is a schematic overview of a full-cycle flow in an embodiment.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
Example 1
In view of the foregoing problems in the prior art, referring to fig. 1, the present embodiment provides a blockchain electronic auction method for protecting user privacy, which includes six stages of uplink deployment, user registration, deposit submission, encrypted bidding, exposed bidding, and auction result. See fig. 2 for roles and related techniques that appear in fig. 3-9.
S1, uplink deployment.
The uplink deployment comprises parameters such as intelligent contracts, corresponding duration conventions, auction population limits, goods to auction attributes, mathematical groups for generating public-private key pairs, and the like. The process deployed on the blockchain involves setting up intelligent contracts and their associated parameters, see fig. 2, for contract expiration dates, upper limit of number of participants, characteristics of the auction item, and a set of algorithms for creating key pairs, respectively.
A user with a willingness to sell an item declares that an auction is initiated, as a seller providing a payment to the auction host, initiates an auction intelligence contract using a set of parameters, determines the item description, maximum duration, maximum number of people, public key code group for the auction.
S2, registering the user.
The information that the user registration needs to send to the smart contract includes 0/1 bit, application role (auctioneer/auctioneer), identity, user public key, etc. As shown in fig. 3, when platform users intend to participate, they need to submit a series of data to the smart contract, including binary bits (0 or 1), which are used to distinguish the role they wish to play (auctioneer or auctioneer). Further, personal identification, public keys, and the like are included.
The bidder acquires the bidding right of an auction event in a pre-acquired and unique biological information authentication mode, generates public and private key pairs on the agreed group, and submits hand over to the collective or the state keys to the auction contract. The proxy auctioneer registers through contracts and hosts the auction. The roles of the user applications can be distinguished according to the 0/1 judgment in fig. 3: 0 is the auctioneer and 1 is the auctioneer.
S3, deposit submitting.
The deposit delivery phase contract receives a set of evidence from the sealed deposit and a zero knowledge range about the deposit. FIG. 4 illustrates that, during the stage of payment of a deposit, an engagement date receives a set of encrypted deposit and its associated zero knowledge proof.
Both the bidder and auctioneer submit deposit and corresponding scope evidence to contract escrow.
S4, encryption bidding.
The encrypted bidding phase user must provide a linkable ring signature containing the peterson commitments of the actual bid and the signed bid. The sealed bidding phase depicted in fig. 5 requires participants to provide a peterson commitment containing a specific bid, and a ring signature for the bid.
Each bidder uses the peterson promise mechanism to present promise regarding bid price and uses the linkable ring signature to sign this promise and send it on the chain, the intelligent contract checks the association between each bid and earlier bids, acknowledging only the first bid for each bidder.
S5, bidding is disclosed.
In the bid opening stage, the user sends the auction master a price packaged with his public key and a random number binding the promise. The bid uncovering stage of fig. 6, the participants send a hidden bid encrypted with a public key to the auctioneer.
When the event proceeds to the bidding period, the auction groups each send the secret value encrypted with the auction master key for the promise of opening themselves to the blockchain, exposing the price and auction winner uniformly by the auctioneers.
S6, auction results.
When the auction is completed, the auctioneer should disclose the winner's purchase price and the provided coverage proof. Referring to fig. 7, at the end of the auction, the auctioneer discloses the bid of the bidder and the corresponding proof on the bulletin board. Referring to fig. 8, the contents of the present method are summarized.
The auctioneer takes the highest legal bid as the winner, and only its bid and corresponding zero knowledge range proof. After the auction is successfully completed, the contract number returns all mortgage amounts participating in Fang Yujiao, and transaction settlement between the seller and the winning buyer is executed.
The method has the privacy of the bidding personnel, the privacy of the bidding contents of buyers except winners and the audit enhancement for avoiding multiple bidding. The method has the advantages of focusing on the information safety of the user while considering the fairness of the blockchain, having profound practical significance and wide application potential.
Firstly, through a zero knowledge proving means, the sealed deposit can prove the rationality of the price without opening, and the deposit paid by each buyer and even the projected user economic level are kept secret to the greatest extent. Moreover, by using a ring signature mechanism, each bidder can calculate by self-help using the public keys of other peers, and hide the identity of the bidder in a group of at most all the bidders, and in addition, for the information of the same person, the clue series connection of the information is achieved by using the linkable signature.
Secondly, the linkable application is applied in the bidding stage, can assist the auctioneer to lock the action that a single bidder may send multiple bids, and helps to standardize the transaction actions of the bidder, and the efficiency of auction events can be improved by one person bidding once.
In addition, the peterson promise scheme with simple calculation process and homomorphism of addition or multiplication operation is used, the encrypted bid has unidirectionality consistent with a hash function and the property that adversaries are difficult to forge, the successfully verified sealed bid is equivalent to the effective bid, and the promise does not reveal any information about contained prices. The promise supports the simultaneous opening of multiple batches, which is beneficial to the improvement of the calculation efficiency and the reduction of the gas cost. The scope attestation technique applied in this scheme has a logarithmic level of computational complexity for attestation generation and verification, as well as logarithmic level of attestation volume, which is fast and efficient for computation on blockchains.
Finally, the semi-trusted third-party auctioneer in the scheme can host the auction until the auction is finished smoothly without directly interacting with the seller, the outside only can know the bidding price of the winner after the transaction is finished, and the deposit amounts of other users are hidden together with the cast price details, so that the firmness degree of the privacy of the user is further enhanced.
Example 2
The present embodiment provides an electronic device, including: one or more processors and memory having stored therein one or more programs including instructions for performing the blockchain electronic auction method of protecting user privacy as described in embodiment 1.
Example 3
The present embodiment provides a computer-readable storage medium comprising one or more programs for execution by one or more processors of an electronic device, the one or more programs comprising instructions for performing the blockchain electronic auction method of protecting user privacy as described in embodiment 1.
While the invention has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.
Claims (10)
1. A block chain electronic auction method for protecting user privacy is characterized by comprising the following steps:
Acquiring auction parameter information, and completing deployment of intelligent contracts;
receiving registration information of a new user, and finishing registration of the new user, wherein the registration information comprises user role categories, and the user role categories comprise auction players and auctioneers;
Receiving zero knowledge range proving information of the deposit from the auction player, and completing deposit delivery;
Receiving bid information based on petdersen commitments from an auction person who has completed deposit submission, and the bid information is signed by a linkable ring signature;
the auctioneer determines the winning auction bidder based on the bidding information of each auction bidder;
Bid information and zero knowledge range proving information of winning bidders are disclosed and only disclosed.
2. The method of claim 1, wherein the auction parameter information includes auction duration, auction population limit, goods to auction attributes, and mathematical groups for generating public-private key pairs.
3. The blockchain electronic auction method of claim 1, wherein the registration information includes a user public key.
4. The blockchain electronic auction method of claim 3, further comprising:
A query request is received from an auction person, and a bid winning result is returned based on the query request, wherein the query request comprises bid information packaged by the public key and a random number bound with a petderson promise.
5. The method of claim 1, wherein the step of determining the winning auction master comprises:
based on bid information signed by the linkable ring signature, a first bid of each bidder is selected as a comparison object, and the winning bidder is determined by the comparison.
6. The method of claim 1, further comprising, prior to receiving zero knowledge range proof of deposit information from an auction master:
Authentication of the auction person is achieved based on pre-acquired and unique biological information.
7. The blockchain electronic auction method of claim 1, wherein each auctioneer, upon bidding, effects the determination of the winning auctioneer by sending a secret value of the bid information for opening its own petderson promise on the blockchain, wherein the secret value is encrypted with the auctioneer's corresponding public key.
8. The blockchain electronic auction method of claim 1, further comprising:
and returning the deposit of the unbiased bidder and executing settlement of the unbiased bidder.
9. An electronic device, comprising: one or more processors and memory, the memory having stored therein one or more programs, the one or more programs comprising instructions for performing the blockchain electronic auction method of protecting user privacy of any of claims 1-8.
10. A computer readable storage medium comprising one or more programs for execution by one or more processors of an electronic device, the one or more programs comprising instructions for performing the blockchain electronic auction method of protecting user privacy of any of claims 1-8.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311837750.XA CN117934129A (en) | 2023-12-28 | 2023-12-28 | Block chain electronic auction method, equipment and storage medium for protecting user privacy |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311837750.XA CN117934129A (en) | 2023-12-28 | 2023-12-28 | Block chain electronic auction method, equipment and storage medium for protecting user privacy |
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| CN117934129A true CN117934129A (en) | 2024-04-26 |
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| CN202311837750.XA Pending CN117934129A (en) | 2023-12-28 | 2023-12-28 | Block chain electronic auction method, equipment and storage medium for protecting user privacy |
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