CN113191862B - Electronic bidding method, third party device, bidding party device and bidding party device - Google Patents
Electronic bidding method, third party device, bidding party device and bidding party device Download PDFInfo
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- CN113191862B CN113191862B CN202110559302.2A CN202110559302A CN113191862B CN 113191862 B CN113191862 B CN 113191862B CN 202110559302 A CN202110559302 A CN 202110559302A CN 113191862 B CN113191862 B CN 113191862B
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- 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
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- G06F21/60—Protecting data
- G06F21/602—Providing cryptographic facilities or services
Abstract
The disclosure provides an electronic bidding method, a third party device, a bidding party device and a bidding party device, wherein the method comprises the following steps: in response to receiving the random numbers respectively corresponding to the bidding side devices and the first encryption results respectively sent by the bidding side devices, respectively decrypting the first encryption results to obtain second difference values; the first encryption result is generated by decrypting a first difference value of random numbers corresponding to other bidding party quotations and other bidding party equipment when bidding party equipment receives a third encryption result sent by bidding party equipment, calculating a second difference value of the first difference value and the bidding party quotations, and encrypting the second difference value by using an encryption key of third party equipment; determining a winning-party device according to each random number and each second difference value; and sending the determined information of the winning bidder device to each bidder device. A decentralised bidding method is provided, and under the condition of ensuring the confidentiality of quotation, all participants are enabled to know bidding results.
Description
Technical Field
The disclosure belongs to the technical field of communication, and in particular relates to an electronic bidding method, third party equipment, bidding party equipment and bidding party equipment.
Background
The current bidding system has the problems that voting system files are stored in a centralized manner in an electronic bidding platform server, and once the server is tampered by a hacker, huge losses are caused, project bidding results are tampered, and the like, so that the problems of unfairness in bidding are caused.
In electronic bid quotation systems, quotation decisions are made to be successful and even historical quotations become information collected by competitors' analysis. Therefore, how to construct a decentralised bidding method, the decentralised network is also used for carrying out random selection in the selection link of bid evaluation experts, and bid evaluation is realized under the condition that the bid is guaranteed to be kept secret forever, even a bid sender can only carry out fair evaluation but cannot know the true bid of the bid sender, and the method is a current problem to be solved urgently.
Disclosure of Invention
The present disclosure addresses the above-described deficiencies in the prior art by providing an electronic bidding method, a third party device, a bidding party device, and a bidding party device.
As a first aspect of the present disclosure, there is provided an electronic bidding method, comprising:
in response to receiving the random numbers respectively corresponding to the bidding side devices and the first encryption results respectively sent by the bidding side devices, decrypting the first encryption results respectively to obtain second difference values; the first encryption result is generated by decrypting a first difference value of random numbers corresponding to other bidding party quotations and other bidding party equipment when bidding party equipment receives a third encryption result sent by bidding party equipment, calculating a second difference value of the first difference value and the quotations of the bidding party equipment, and encrypting the second difference value by using an encryption key of the third party equipment;
determining a winning-party device according to each random number and each second difference value;
and sending the determined information of the winning bidder device to each bidder device.
Preferably, the determining the winning device according to each random number and each second difference value includes:
respectively calculating the sum of the random number and each second difference value to obtain a third difference value of any two bidding parties;
and determining the winning-winning device according to the third difference value.
As a second aspect of the present disclosure, there is provided an electronic bidding method, comprising:
generating random numbers and bidding books respectively corresponding to the bidding party equipment;
encrypting the corresponding random numbers by utilizing the encryption keys of the locally stored bidding party equipment to obtain a second encryption result of the bidding party equipment;
and respectively transmitting the bidding document, each second encryption result and the random number respectively corresponding to each bidder device to the corresponding bidder device and the third party device.
Preferably, the method further comprises:
in response to receiving the encrypted bid winning bid sent by the bid winning device, decrypting to obtain the bid winning bid;
homomorphic encrypting the winning bid to obtain a first ciphertext;
the first ciphertext is respectively sent to other bidding party equipment;
responding to the received ciphertext combinations returned by the bidding side equipment, and homomorphic decryption is carried out on the ciphertext combinations to obtain decryption results; and determining whether the winning-winning device is correct or not according to each decryption result.
As a third aspect of the present disclosure, there is provided an electronic bidding method, comprising:
in response to receiving a third encryption result sent by other bidding party equipment, decrypting the third encryption result to obtain a first difference value of a random number corresponding to the bidding price of the other bidding party equipment and the other bidding party equipment; the third encryption result is generated after the other bidding party equipment receives the second encryption result sent by the bidding party equipment, decrypts the random number corresponding to the other bidding party equipment, calculates a first difference value of the random number corresponding to the other bidding party equipment and quoted by the other bidding party, and encrypts the first difference value by using the encryption key of the bidding party equipment;
calculating a second difference between the first difference and the bid of the bidding party equipment;
encrypting the second difference value by using a locally stored encryption key of the third party equipment to obtain a first encryption result;
and sending the first encryption result to the third party device.
Preferably, the method further comprises:
in response to receiving a bidding document and a second encryption result sent by bidding party equipment, decrypting the second encryption result to obtain a random number corresponding to the bidding party equipment;
calculating a first difference value of the quotation of the bidding party equipment and the random number corresponding to the bidding party equipment;
encrypting the first difference value by using encryption keys of other bidding party equipment to obtain each third encryption result;
and sending each third encryption result to other bidder devices and third party devices.
Preferably, the method further comprises:
receiving a first ciphertext transmitted by a mark transmitting side device;
the homomorphic encryption bidding party quotes to obtain a second ciphertext, and the homomorphic encryption bidding party equipment corresponds to a random number to obtain a third ciphertext;
generating a ciphertext combination according to the first ciphertext, the second ciphertext, and the third ciphertext;
and returning the ciphertext combination to the mark issuing side equipment.
Preferably, the method further comprises:
and in response to receiving the information of the bid-winning party equipment sent by the third party equipment, wherein the information of the bid-winning party equipment is consistent with the information of the bidding party equipment, encrypting the bid-winning bid price of the bidding party equipment by using an encryption key of the bidding party equipment, and sending the encrypted bid-winning bid price to the bidding party equipment.
As a fourth aspect of the present disclosure, there is provided a third party device comprising:
the decryption module is used for respectively decrypting each first encryption result to obtain each second difference value in response to the received random numbers respectively corresponding to the bidding party devices and the first encryption results sent by the bidding party devices; the first encryption result is generated by decrypting a first difference value of random numbers corresponding to other bidding party quotations and other bidding party equipment when bidding party equipment receives a third encryption result sent by bidding party equipment, calculating a second difference value of the first difference value and the quotations of the bidding party equipment, and encrypting the second difference value by using an encryption key of the third party equipment;
the determining module is used for determining the winning-winning device according to the random numbers and the second difference values;
and the sending module is used for sending the determined information of the winning bidder equipment to each bidder equipment.
As a fifth aspect of the present disclosure, there is provided a signer apparatus comprising:
the generation module is used for generating random numbers and bidding books respectively corresponding to the bidding party equipment;
the encryption module is used for encrypting the corresponding random numbers by utilizing the locally stored encryption keys of the bidding party equipment to obtain a second encryption result of the bidding party equipment;
and the sending module is used for respectively sending the bidding document, each second encryption result and the random number respectively corresponding to each bidding party device to the corresponding bidding party device and the third party device.
As a sixth aspect of the present disclosure, there is provided a bidder apparatus comprising:
the decryption module is used for responding to the received third encryption result sent by other bidding party equipment, decrypting the third encryption result and obtaining a first difference value of the quotation of the other bidding party equipment and the random number corresponding to the other bidding party equipment; the third encryption result is generated after the other bidding party equipment receives the second encryption result sent by the bidding party equipment, decrypts the random number corresponding to the other bidding party equipment, calculates a first difference value of the random number corresponding to the other bidding party equipment and quoted by the other bidding party, and encrypts the first difference value by using the encryption key of the bidding party equipment;
a calculating module, configured to calculate a second difference between the first difference and a bid of the bidding device;
the encryption module is used for encrypting the second difference value by utilizing the encryption key of the locally stored third party equipment to obtain a first encryption result;
and the sending module is used for sending the first encryption result to the third party equipment.
According to the electronic bidding method provided by the embodiment of the disclosure, if the third party equipment receives the random numbers corresponding to the bidding party equipment and the first encryption results sent by the bidding party equipment, which are sent by the bidding party equipment, the bidding size of the bidding party equipment is determined according to the random numbers and the second difference values, the bidding party equipment with the highest bidding is determined as the bidding party equipment according to the bidding size of the bidding party equipment, and the third party equipment sends the determined information of the bidding party equipment to the bidding party equipment. The embodiment of the disclosure provides a decentralised bidding method, wherein the selection link of bid evaluation experts is also randomly selected by a decentralised network, bid evaluation is realized under the condition that the bid is guaranteed to be kept secret forever, all participants are enabled to know the final bid result, but the quotations of other parties cannot be known. And the random number is added as an interference factor in the encryption process, so that the reverse deduction of the effective information of other participants is avoided, the safety of bidding parties is protected, the fairness and reliability of bidding are improved, and the safety is greatly improved.
Drawings
FIG. 1 is a flow chart of an electronic bidding method for a third party device side provided in an embodiment of the present disclosure;
FIG. 2 is a flowchart of an electronic bidding method on the device side of the bidding initiator according to an embodiment of the present disclosure;
FIG. 3 is a flow chart of an electronic bidding method for the bidder device side provided by embodiments of the present disclosure;
fig. 4 is a schematic structural diagram of a third party device according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of a label issuing side device according to an embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of a bidder device according to an embodiment of the present disclosure.
Detailed Description
In order that those skilled in the art will better understand the technical solutions of the present disclosure, the present disclosure will be described in further detail with reference to the accompanying drawings and detailed description.
In order to construct a decentralised bidding method, the decentralised network is also used for random selection in the selection link of bid evaluation experts, and under the condition of ensuring that the bid price is always kept secret, bid evaluation is realized, and even a bid issuing party can only perform fair evaluation but cannot know the true bid price of the bid issuing party. The disclosure provides an electronic bidding method, third party equipment, bidding party equipment and bidding party equipment. The following detailed description is provided with reference to the accompanying drawings of the embodiments provided by the present disclosure, respectively.
In the initial stage, encryption keys and decryption keys of bidding party equipment, bidding party equipment and third party equipment are respectively set, and corresponding terminal numbers are prestored in each equipment.
The bidding party equipment, the bidding party equipment and the third party equipment respectively acquire encryption keys and terminal numbers of other parties in advance through off-line or on-line modes. For example, a bidding server or other device is provided that is dedicated to storing the identification, encryption key, terminal number of each bidding party device, third party device, and bidding party device. In order to avoid tampering of network transmission terminal numbers and the like, bidding party equipment and third party equipment prestore own identifications, terminal numbers and encryption keys in a bidding server in an offline handling mode. After receiving the label sent by the label issuing device, the bidding server sends the identifications and the encryption keys of the bidding device, the label issuing device and the third party device to each party in a short message or message mode.
In the embodiment of the present disclosure, a total of three bidder devices (bidder device a, bidder device b, bidder device c) are taken as an example, and the following discussion is made.
Fig. 1 shows a flowchart of an electronic bidding method at a third party device side provided in an embodiment of the present disclosure. As shown in fig. 1, the electronic bidding method provided in this embodiment includes the following steps.
Step S101, in response to receiving the random numbers respectively corresponding to the bidding side devices sent by the bidding side devices and the first encryption results sent by the bidding side devices, respectively decrypting the first encryption results to obtain second difference values.
Step S102, determining the winning-winning device according to the random numbers and the second difference values.
And step S103, the determined information of the winning bidder equipment is sent to each bidder equipment.
The first encryption result is generated by decrypting a first difference value of random numbers corresponding to the bidding devices and quoted by other bidding devices when the bidding devices receive a third encryption result sent by the bidding device, calculating a second difference value of the first difference value and the quoted price of the bidding devices, and encrypting the second difference value by using an encryption key of the third party device.
According to the electronic bidding method provided by the embodiment of the disclosure, if the third party equipment receives the random numbers corresponding to the bidding party equipment and the first encryption results sent by the bidding party equipment, which are sent by the bidding party equipment, the decryption key of the third party equipment is utilized to decrypt the second difference value, the bidding size of the bidding party equipment is determined according to the random numbers and the second difference value, the bidding party equipment with the highest bidding price is determined according to the bidding size of the bidding party equipment and is used as the bidding party equipment, and the third party equipment sends the determined information of the bidding party equipment to the bidding party equipment. The embodiment of the disclosure provides a decentralised bidding method, wherein the selection link of bid evaluation experts is also randomly selected by a decentralised network, bid evaluation is realized under the condition that the bid is guaranteed to be kept secret forever, all participants are enabled to know the final bid result, but the quotations of other parties cannot be known. And the random number is added as an interference factor in the encryption process, so that the reverse deduction of the effective information of other participants is avoided, the safety of bidding parties is protected, the fairness and reliability of bidding are improved, and the safety is greatly improved.
In some embodiments, the determining the winning device according to the random numbers and the second differences (i.e. step S102) includes: respectively calculating the sum of the random number and each second difference value to obtain a third difference value of the bidding price of any two bidding parties; and determining the winning-square equipment according to the third difference value.
In the embodiment of the disclosure, the third party device decrypts to obtain the second difference in the form of B-Rb-ase:Sub>A, C-Rc-ase:Sub>A, ase:Sub>A-Rase:Sub>A-C, B-Rb-C, C-Rc-B, ase:Sub>A-Rase:Sub>A-B, and then adds Rb, rc, rase:Sub>A to the numbers to obtain the third difference, i.e., the value of ase:Sub>A-B, B-ase:Sub>A, C-ase:Sub>A, ase:Sub>A-C, B-C, C-B, and ranks the bid amounts (A, B, C) of the bidding devices according to whether the third difference is greater than 0 or less than 0, but the ABC specific value is not known. And selecting the top bid from the bid according to the sorting result of A, B, C as a bid winning bid, wherein bidding equipment corresponding to the bid winning bid is bid winning equipment.
It should be noted that a is a bid amount of bidder device a, B is a bid amount of bidder device B, C is a bid amount of bidder device C, ra is a random number corresponding to bidder device a, rb is a random number corresponding to bidder device B, and Rc is a random number corresponding to bidder device C.
It should be noted that, in the embodiment of the present disclosure, all information may be sent to the device by means of a message, or may be sent to a terminal number corresponding to the device by means of a short message.
Fig. 2 shows a flowchart of an electronic bidding method at the bidding device side provided by an embodiment of the present disclosure. As shown in fig. 2, the electronic bidding method provided in this embodiment includes the following steps.
Step S201, a random number and a bid corresponding to each bidder device are generated.
Step S202, encrypting the corresponding random numbers by using the encryption keys of the locally stored bidding party equipment to obtain second encryption results of the bidding party equipment.
And step S203, the bidding books, the second encryption results and the random numbers corresponding to the bidding party equipment are respectively sent to the corresponding bidding party equipment and the third party equipment.
According to the electronic bidding method provided by the embodiment of the disclosure, the bidding party equipment generates random numbers and bidding books corresponding to bidding parties respectively, the encryption keys of the bidding party equipment stored locally are utilized to encrypt the corresponding random numbers to obtain second encryption results Ea (Ra), eb (Rb) and Ec (Rc) of the bidding party equipment respectively, the bidding books, ea (Ra), eb (Rb), ec (Rc), ra, rb and Rc are sent to the corresponding bidding party equipment respectively, and Ea (Ra), eb (Rb), ec (Rc), ra, rb and Rc are sent to the third party equipment. The embodiment of the disclosure provides a decentralised bidding method, wherein the selection link of bid evaluation experts is also randomly selected by a decentralised network, bid evaluation is realized under the condition that the bid is guaranteed to be kept secret forever, all participants are enabled to know the final bid result, but the quotations of other parties cannot be known. And the random number is added as an interference factor in the encryption process, so that the reverse deduction of the effective information of other participants is avoided, the safety of bidding parties is protected, the fairness and reliability of bidding are improved, and the safety is greatly improved.
In some embodiments, the method further comprises:
in response to receiving the encrypted bid winning bid sent by the bid winning device, decrypting to obtain the bid winning bid; homomorphic encryption bid winning bid to obtain a first ciphertext; the first ciphertext is respectively sent to other bidding party equipment; responding to the received ciphertext combinations returned by the bidding side equipment, and homomorphic decryption is carried out on the ciphertext combinations to obtain decryption results; and determining whether the winning-side equipment is correct according to each decryption result.
In the embodiment of the disclosure, if the bid-winning device receives the encrypted bid-winning bid price sent by the bid-winning device, the bid-winning bid price is obtained through decryption. The bidding devices can only know the bid winning bid, but not the bid of other bidding devices except the bidding device. The bidding device homomorphically encrypts the bid winning bid to obtain a first ciphertext, e.g., computes HEn (a) (assuming the bidding device is bidding device a). The bidding side device transmits HEn (a) to bidding side device b and bidding side device c, respectively. If the sender device receives the ciphertext combination [ Hen (a) -Hen (B) ] returned by the bidder device B and receives the ciphertext combination [ Hen (a) -Hen (C) ] Hen (Rc) returned by the bidder device C, the sender device respectively performs homomorphic decryption on the [ Hen (a) -Hen (B) ]hen (Rb) and the [ Hen (a) -Hen (C) ]hen (Rc), and respectively obtains a decryption result (a-B) Rb and a decryption result (a-C) Rc. Offers A, B, C can be ordered according to the positive and negative of (a-B) Rb and (a-C) Rc. And if the A is the maximum value according to the sorting, the correct winning-winning party equipment determined by the third-party equipment is indicated.
If the winning bid device is the bidding device b or the bidding device c, the winning bid device is also verified to be correct by the same procedure as described above.
It should be noted that, in the embodiment of the present disclosure, all information may be sent to the device by means of a message, or may be sent to a terminal number corresponding to the device by means of a short message.
Fig. 3 shows a flowchart of an electronic bidding method at the bidder device side provided by an embodiment of the present disclosure. As shown in fig. 3, the electronic bidding method provided in this embodiment includes the following steps.
In step S301, in response to receiving the third encryption result sent by the other bidder device, the third encryption result is decrypted, so as to obtain a first difference value between the quoted price of the other bidder device and the random number corresponding to the other bidder device.
Step S302, a second difference between the first difference and the bid of the bidding device is calculated.
Step S303, the second difference value is encrypted by using the encryption key of the locally stored third party device, and a first encryption result is obtained.
Step S304, the first encryption result is sent to the third party device.
The third encryption result is generated after other bidding party equipment receives the second encryption result sent by the bidding party equipment, decrypts the random numbers corresponding to the other bidding party equipment, calculates first difference values of the random numbers corresponding to the other bidding party equipment and quoted by the other bidding party, and encrypts the first difference values by using the encryption key of the bidding party equipment.
According to the electronic bidding method provided by the embodiment of the disclosure, if the bidding party equipment receives the third encryption result sent by other bidding party equipment, the bidding party equipment decrypts by using the decryption key of the bidding party equipment to obtain the first difference value 'B-Rb' and 'C-Rc' (assuming that the bidding party equipment is a), calculates the second difference value 'B-Rb-A' and 'C-Rc-A' of the first difference value and the quotation of the bidding party equipment, encrypts by using the prestored encryption key of the third sending equipment to obtain the first encryption result, and sends the first encryption result to the third party equipment. The embodiment of the disclosure provides a decentralised bidding method, wherein the selection link of bid evaluation experts is also randomly selected by a decentralised network, bid evaluation is realized under the condition that the bid is guaranteed to be kept secret forever, all participants are enabled to know the final bid result, but the quotations of other parties cannot be known. And the random number is added as an interference factor in the encryption process, so that the reverse deduction of the effective information of other participants is avoided, the safety of bidding parties is protected, the fairness and reliability of bidding are improved, and the safety is greatly improved.
The same procedure as described above is also performed for the bidder device b and the bidder device c.
In some embodiments, the method further comprises:
in response to receiving the bidding document and the second encryption result sent by the bidding party sending equipment, decrypting the second encryption result to obtain a random number corresponding to the bidding party sending equipment; calculating a first difference value of the quotation of the bidding party equipment and the random number corresponding to the bidding party equipment; encrypting the first difference value by using encryption keys of other bidding party equipment to obtain third encryption results; and sending each third encryption result to other bidder devices and third party devices.
In the embodiment of the disclosure, if the bidding device receives the bidding document and the second encryption result sent by the bidding device, the bidding device determines the bid price of the bidding device according to the bidding document, decrypts the bid price by using the decryption key of the bidding device to obtain Ra (assuming that the bidding device is a), calculates a first difference value a-Ra, encrypts the a-Ra by using the encryption key of the bidding device b/c according to a predetermined algorithm to obtain a third encryption result Eb/c (a-Ra), and sends Eb/c (a-Ra) to the bidding device b, the bidding device c and the third party device.
The same procedure as described above is also performed for the bidder device b and the bidder device c.
In some embodiments, the method further comprises:
receiving a first ciphertext transmitted by a mark transmitting side device; the homomorphic encryption bidding party quotes to obtain a second ciphertext, and the homomorphic encryption bidding party equipment corresponds to a random number to obtain a third ciphertext; generating a ciphertext combination according to the first ciphertext, the second ciphertext and the third ciphertext; and returning the ciphertext combination to the mark issuing party equipment.
In the embodiment of the disclosure, a bidding party device B receives a Hen (a) sent by a bidding party device, a bid B of the homomorphic encryption bidding party device B obtains a second ciphertext Hen (B), a random number Rb corresponding to the homomorphic encryption bidding party device B obtains a third ciphertext Hen (Rb), a ciphertext combination [ Hen (a) -Hen (B) ], a Hen (Rb) is generated according to a preset algorithm, and the [ Hen (a) -Hen (B) ], the Hen (Rb) is returned to the bidding party device. Meanwhile, the bidding party equipment C receives the Hen (A) sent by the bidding party equipment, the bid C of the homomorphic encryption bidding party equipment C obtains a second ciphertext Hen (C), the random number Rc corresponding to the homomorphic encryption bidding party equipment C obtains a third ciphertext Hen (Rc), a ciphertext combination [ Hen (A) -Hen (C) ]hen (Rc) is generated according to a preset algorithm, and the [ Hen (A) -Hen (C) ]hen (Rc) is returned to the bidding party equipment. And verifying whether the winning party device determined by the third party device is correct by the winning party device.
In some embodiments, the method further comprises:
and in response to receiving the information of the bid-winning party equipment sent by the third party equipment, wherein the information of the bid-winning party equipment is consistent with the information of the bidding party equipment, encrypting the bid-winning bid price of the bidding party equipment by using an encryption key of the bidding party equipment, and sending the encrypted bid-winning bid price to the bidding party equipment. The bid-issuing side equipment can decrypt the encrypted bid-winning bid by utilizing the decryption key of the bid-winning side equipment to obtain the bid-winning bid. The bidding devices can only know the bid winning bid, but not the bid of other bidding devices except the bidding device.
In a preferred embodiment, each bidder device may also actively obtain information of the winning bidder device from the third party device to determine whether the bidding device is the winning bidder device.
It should be noted that, in the embodiment of the present disclosure, all information may be sent to the device by means of a message, or may be sent to a terminal number corresponding to the device by means of a short message.
Fig. 4 shows a schematic structural diagram of a third party device provided in an embodiment of the present disclosure. Based on the same technical concept as the embodiment corresponding to fig. 1, as shown in fig. 4, the third party device provided by the embodiment of the disclosure includes the following modules.
A decryption module 11, configured to, in response to receiving the random numbers respectively corresponding to the bidding side devices sent by the bidding side devices and the first encryption results sent by the bidding side devices, decrypt each of the first encryption results to obtain each of the second difference values; the first encryption result is generated by decrypting a first difference value of random numbers corresponding to other bidding party quotations and other bidding party equipment when bidding party equipment receives a third encryption result sent by bidding party equipment, calculating a second difference value of the first difference value and the quotations of the bidding party equipment, and encrypting the second difference value by using an encryption key of the third party equipment;
a determining module 12, configured to determine a winning device according to each of the random numbers and each of the second differences;
and the sending module 13 is used for sending the determined information of the winning bidder device to each bidder device.
In some embodiments, the determining module 12 is specifically configured to:
respectively calculating the sum of the random number and each second difference value to obtain a third difference value of any two bidding parties;
and determining the winning-winning device according to the third difference value.
Fig. 5 shows a schematic structural diagram of a mark issuing device provided in an embodiment of the present disclosure. Based on the same technical concept as the embodiment corresponding to fig. 2, as shown in fig. 5, the label issuing side device provided by the embodiment of the disclosure includes the following modules.
A generation module 21 for generating a random number and a bid corresponding to each bidder device, respectively;
a first encryption module 22, configured to encrypt the corresponding random number with an encryption key of each bidder device stored locally, so as to obtain a second encryption result of each bidder device;
and the sending module 23 is configured to send the bidding document, each second encryption result, and the random number corresponding to each bidding device to the corresponding bidding device and the third party device, respectively.
In some embodiments, further comprising:
the first decryption module is used for responding to the received encrypted bid winning bid price sent by the bid winning party device and decrypting to obtain the bid winning bid price;
the second encryption module is used for homomorphism encrypting the winning bid and winning bid to obtain a first ciphertext;
the sending module 23 is further configured to send the first ciphertext to each other bidder device;
the second decryption module is used for responding to the received ciphertext combinations returned by the bidding party equipment and homomorphic decrypting the ciphertext combinations to obtain decryption results;
and the determining module is used for determining whether the winning-party equipment is correct or not according to each decryption result.
Fig. 6 illustrates a schematic structure of a bidder device provided by an embodiment of the present disclosure. Based on the same technical concept as the embodiment corresponding to fig. 3, as shown in fig. 6, the bidder device provided by the embodiment of the present disclosure includes the following modules.
A first decryption module 31, configured to decrypt the third encryption result in response to receiving the third encryption result sent by the other bidder device, to obtain a first difference value between the quoted price of the other bidder device and the random number corresponding to the other bidder device; the third encryption result is generated after the other bidding party equipment receives the second encryption result sent by the bidding party equipment, decrypts the random number corresponding to the other bidding party equipment, calculates a first difference value of the random number corresponding to the other bidding party equipment and quoted by the other bidding party, and encrypts the first difference value by using the encryption key of the bidding party equipment;
a first calculating module 32, configured to calculate a second difference between the first difference and the bid of the bidding device;
a first encryption module 33, configured to encrypt the second difference value with a locally stored encryption key of a third party device, to obtain a first encryption result;
and the sending module 34 is configured to send the first encryption result to the third party device.
In some embodiments, further comprising:
the second decryption module is used for decrypting the second encryption result in response to receiving the bidding document and the second encryption result sent by the bidding party equipment to obtain a random number corresponding to the bidding party equipment;
the second calculation module is used for calculating a first difference value of the quotation of the bidding party equipment and the random number corresponding to the bidding party equipment;
the second encryption module is used for encrypting the first difference value by using encryption keys of other bidding party equipment respectively to obtain third encryption results;
the sending module 34 is further configured to send each third encryption result to other bidder devices and third party devices.
In some embodiments, further comprising:
the receiving module is used for receiving the first ciphertext sent by the mark sending device;
the third encryption module is used for homomorphic encrypting the bidding party to obtain a second ciphertext and homomorphic encrypting the random number corresponding to the bidding party equipment to obtain a third ciphertext;
the generation module is used for generating a ciphertext combination according to the first ciphertext, the second ciphertext and the third ciphertext;
the sending module 34 is further configured to return the ciphertext combination to the sender apparatus.
In some embodiments, further comprising:
the fourth encryption module is used for responding to the received information of the bid-winning party equipment sent by the third party equipment, the information of the bid-winning party equipment is consistent with the information of the bid-winning party equipment, and the bid-winning quotation of the bid-winning party equipment is encrypted by utilizing the encryption key of the bid-winning party equipment;
the sending module 34 is further configured to send the encrypted bid winning bid to a bidding sender device.
It is to be understood that the above embodiments are merely exemplary embodiments employed to illustrate the principles of the present disclosure, however, the present disclosure is not limited thereto. Various modifications and improvements may be made by those skilled in the art without departing from the spirit and substance of the disclosure, and are also considered to be within the scope of the disclosure.
Claims (8)
1. An electronic bidding method, comprising:
in response to receiving the random numbers respectively corresponding to the bidding side devices and the first encryption results respectively sent by the bidding side devices, decrypting the first encryption results respectively to obtain second difference values; the first encryption result is generated by decrypting a first difference value of random numbers corresponding to other bidding party quotations and other bidding party equipment when bidding party equipment receives a third encryption result sent by bidding party equipment, calculating a second difference value of the first difference value and the quotations of the bidding party equipment, and encrypting the second difference value by using an encryption key of the third party equipment;
determining a winning-party device according to each random number and each second difference value;
and sending the determined information of the winning bidder device to each bidder device.
2. The electronic bidding method of claim 1, wherein said determining the winning bid device based on each of the random numbers and each of the second differences comprises:
respectively calculating the sum of the random number and each second difference value to obtain a third difference value of any two bidding parties;
and determining the winning-winning device according to the third difference value.
3. An electronic bidding method, comprising:
in response to receiving a third encryption result sent by other bidding party equipment, decrypting the third encryption result to obtain a first difference value of a random number corresponding to the bidding price of the other bidding party equipment and the other bidding party equipment; the third encryption result is generated after the other bidding party equipment receives the second encryption result sent by the bidding party equipment, decrypts the random number corresponding to the other bidding party equipment, calculates a first difference value of the random number corresponding to the other bidding party equipment and quoted by the other bidding party, and encrypts the first difference value by using the encryption key of the bidding party equipment;
calculating a second difference between the first difference and the bid of the bidding party equipment;
encrypting the second difference value by using a locally stored encryption key of the third party equipment to obtain a first encryption result;
and sending the first encryption result to the third party device.
4. The electronic bidding method of claim 3, wherein the method further comprises:
in response to receiving a bidding document and a second encryption result sent by bidding party equipment, decrypting the second encryption result to obtain a random number corresponding to the bidding party equipment;
calculating a first difference value of the quotation of the bidding party equipment and the random number corresponding to the bidding party equipment;
encrypting the first difference value by using encryption keys of other bidding party equipment to obtain each third encryption result;
and sending each third encryption result to other bidder devices and third party devices.
5. The electronic bidding method of claim 3, wherein the method further comprises:
receiving a first ciphertext transmitted by a mark transmitting side device;
the homomorphic encryption bidding party quotes to obtain a second ciphertext, and the homomorphic encryption bidding party equipment corresponds to a random number to obtain a third ciphertext;
generating a ciphertext combination according to the first ciphertext, the second ciphertext, and the third ciphertext;
and returning the ciphertext combination to the mark issuing side equipment.
6. The electronic bidding method of claim 5, further comprising:
and in response to receiving the information of the bid-winning party equipment sent by the third party equipment, wherein the information of the bid-winning party equipment is consistent with the information of the bidding party equipment, encrypting the bid-winning bid price of the bidding party equipment by using an encryption key of the bidding party equipment, and sending the encrypted bid-winning bid price to the bidding party equipment.
7. A third party device, comprising:
the decryption module is used for respectively decrypting each first encryption result to obtain each second difference value in response to the received random numbers respectively corresponding to the bidding party devices and the first encryption results sent by the bidding party devices; the first encryption result is generated by decrypting a first difference value of random numbers corresponding to other bidding party quotations and other bidding party equipment when bidding party equipment receives a third encryption result sent by bidding party equipment, calculating a second difference value of the first difference value and the quotations of the bidding party equipment, and encrypting the second difference value by using an encryption key of the third party equipment;
the determining module is used for determining the winning-winning device according to the random numbers and the second difference values;
and the sending module is used for sending the determined information of the winning bidder equipment to each bidder equipment.
8. A bidder device, comprising:
the decryption module is used for responding to the received third encryption result sent by other bidding party equipment, decrypting the third encryption result and obtaining a first difference value of the quotation of the other bidding party equipment and the random number corresponding to the other bidding party equipment; the third encryption result is generated after the other bidding party equipment receives the second encryption result sent by the bidding party equipment, decrypts the random number corresponding to the other bidding party equipment, calculates a first difference value of the random number corresponding to the other bidding party equipment and quoted by the other bidding party, and encrypts the first difference value by using the encryption key of the bidding party equipment;
a calculating module, configured to calculate a second difference between the first difference and a bid of the bidding device;
the encryption module is used for encrypting the second difference value by utilizing the encryption key of the locally stored third party equipment to obtain a first encryption result;
and the sending module is used for sending the first encryption result to the third party equipment.
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