CN113191862A - Electronic bidding method, third party device, sponsor device and bidder device - Google Patents
Electronic bidding method, third party device, sponsor device and bidder device Download PDFInfo
- Publication number
- CN113191862A CN113191862A CN202110559302.2A CN202110559302A CN113191862A CN 113191862 A CN113191862 A CN 113191862A CN 202110559302 A CN202110559302 A CN 202110559302A CN 113191862 A CN113191862 A CN 113191862A
- Authority
- CN
- China
- Prior art keywords
- bidder
- party
- bidding
- equipment
- encryption
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- 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
- 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
Abstract
The present disclosure provides an electronic bidding method, a third party device, a sponsor device and a bidder device, the method comprising: respectively decrypting each first encryption result to obtain each second difference value in response to receiving the random number respectively corresponding to each bidder device and the first encryption result sent by each bidder device sent by the bidder device; the first encryption result is generated by the bidder equipment decrypting a first difference value between the other bidder quotations and random numbers corresponding to the other bidder equipment after receiving a third encryption result sent by the tenderer equipment, calculating a second difference value between the first difference value and the local bidder quotation and encrypting the second difference value by using an encryption key of the third party equipment; determining winning square equipment according to the random numbers and the second difference values; and sending the determined information of the winning bidder device to each bidder device. A decentralization bidding method is provided, and all participants can know the bidding result under the condition of ensuring the quotation to be confidential.
Description
Technical Field
The disclosure belongs to the technical field of communication, and particularly relates to an electronic bidding method, a third-party device, a tenderer device and a bidder device.
Background
The existing bidding system has the problems that the voting system files are stored in a centralized manner in an electronic bidding platform server, once the server is tampered by a hacker, huge loss is caused or the bidding result of a project is tampered, and the like, so that the bidding is unfair.
In the electronic bid/offer system, the offer is determined to be successful or unsuccessful, and even the historical offer becomes information analyzed and collected by the competitor. Therefore, how to construct a decentralized bidding method is to randomly select the bid in the selection link of the bid evaluation expert through a decentralized network, and realize the bid evaluation under the condition of ensuring that the bid price is always kept secret, even if the bid issuer only can perform fair evaluation but cannot know the real bid price of the bidder, which is a problem to be solved urgently at present.
Disclosure of Invention
In view of the above-mentioned shortcomings in the prior art, the present disclosure provides an electronic bidding method, a third party device, a sponsor device and a bidder device.
As a first aspect of the present disclosure, there is provided an electronic bidding method, including:
respectively decrypting each first encryption result to obtain each second difference value in response to receiving the random number respectively corresponding to each bidder device and the first encryption result sent by each bidder device sent by the tenderer device; the first encryption result is generated by the bidder equipment decrypting a first difference value between the quotations of other bidders and random numbers corresponding to the quotations of other bidder equipment after receiving a third encryption result sent by the tenderer equipment, calculating a second difference value between the first difference value and the quotation of the bidder equipment and encrypting the second difference value by using an encryption key of the third party equipment;
determining winning square equipment according to the random numbers and the second difference values;
and sending the determined information of the winning bidder device to each bidder device.
Preferably, the determining a winning square 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 winning square equipment according to the third difference.
As a second aspect of the present disclosure, there is provided an electronic bidding method, including:
generating random numbers and bidding documents respectively corresponding to each bidder device;
encrypting the corresponding random number by using the locally stored encryption key of each bidder device to obtain a second encryption result of each bidder device;
and respectively sending 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 quotation sent by the bid-winning party equipment, decrypting to obtain the bid-winning quotation;
encrypting the bid-winning quotation in a homomorphic way to obtain a first ciphertext;
respectively sending the first ciphertext to other bidder devices;
responding to the received ciphertext combinations returned by each bidder device, and carrying out homomorphic decryption on each ciphertext combination to obtain each decryption result; and determining whether the winning party equipment is correct or not according to each decryption result.
As a third aspect of the present disclosure, there is provided an electronic bidding method, including:
in response to receiving a third encryption result sent by other bidder equipment, decrypting the third encryption result to obtain a first difference value between the quotation of the other bidder equipment and the random number corresponding to the other bidder equipment; the third encryption result is generated after the other bidding party equipment receives the second encryption result sent by the sending party equipment, decrypts the random number corresponding to the other bidding party equipment, calculates a first difference value between the other bidding party quotation and the random number corresponding to the other bidding party equipment and encrypts the first difference value by using the encryption key of the local bidding party equipment;
calculating a second difference value between the first difference value and the quoted price of the device of the bidding party;
encrypting the second difference value by using an encryption key of the locally stored third-party equipment to obtain a first encryption result;
and sending the first encryption result to the third-party equipment.
Preferably, the method further comprises:
in response to the received bidding document and the second encryption result sent by the bidding party equipment, decrypting the second encryption result to obtain a random number corresponding to the bidding party equipment;
calculating a first difference value between the quoted price of the bidding party device and the random number corresponding to the bidding party device;
encrypting the first difference values by using encryption keys of other bidder devices respectively to obtain third encryption results;
and transmitting each third encryption result to other bidder devices and the third party device.
Preferably, the method further comprises:
receiving a first ciphertext sent by a caller device;
the bidding party performs homomorphic encryption to obtain a second ciphertext, and performs homomorphic encryption to obtain a third ciphertext according to the random number corresponding to the bidding party equipment;
generating a ciphertext combination according to the first ciphertext, the second ciphertext and the third ciphertext;
and returning the ciphertext combination to the sending party equipment.
Preferably, the method further comprises:
and in response to the fact that the information of the successful bid party device sent by the third party device is received and the information of the successful bid party device is consistent with the information of the bid party device, the encryption key of the bid party device is used for encrypting the successful bid quotation of the bid party device, and the encrypted successful bid quotation is sent to the bid party device.
As a fourth aspect of the present disclosure, there is provided a third party device comprising:
the decryption module is used for responding to the received random numbers respectively corresponding to the bidding party devices and the first encryption results sent by the bidding party devices and respectively decrypting the first encryption results to obtain second difference values; the first encryption result is generated by the bidder equipment decrypting a first difference value between the quotations of other bidders and random numbers corresponding to the quotations of other bidder equipment after receiving a third encryption result sent by the tenderer equipment, calculating a second difference value between the first difference value and the quotation of the bidder equipment and encrypting the second difference value by using an encryption key of the third party equipment;
the determining module is used for determining winning square equipment according to the random numbers and the second difference values;
and the sending module is used for sending the determined information of the successful bidder equipment to each bidder equipment.
As a fifth aspect of the present disclosure, there is provided a maker apparatus comprising:
the generation module is used for generating random numbers and bidding documents respectively corresponding to each bidder device;
the encryption module is used for encrypting the corresponding random number by using the locally stored encryption key of each bidder device to obtain a second encryption result of each bidder device;
and the sending module is used for sending 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.
As a sixth aspect of the present disclosure, there is provided a bidder device comprising:
the decryption module is used for responding to the third encryption result sent by other bidding party equipment and decrypting the third encryption result to obtain a first difference value between 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 sending party equipment, decrypts the random number corresponding to the other bidding party equipment, calculates a first difference value between the other bidding party quotation and the random number corresponding to the other bidding party equipment and encrypts the first difference value by using the encryption key of the local bidding party equipment;
the calculating module is used for calculating a second difference value between the first difference value and the quoted price of the bidding party equipment;
the encryption module is used for encrypting the second difference value by using an 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 device receives the random numbers corresponding to the bidding party devices and the first encryption results sent by the bidding party devices, the random numbers and the second difference values are used for determining the quotation size of the bidding party devices, the bidding party device with the highest quotation is determined as the winning-bid party device according to the quotation size of the bidding party devices, and the third-party device sends the determined information of the winning-bid party device to the bidding party devices. The embodiment of the disclosure provides a decentralization bidding method, and the selection link of the bid evaluation expert is also randomly selected by a decentralization network, so that the bid evaluation is realized under the condition of ensuring that the quotation is kept secret forever, all participants know the final bidding result, but cannot know the quotation of other parties. And random numbers are added in the encryption process as interference factors, so that the effective information of other participants is prevented from being deduced reversely, the safety of the bidder is protected, the fairness and the reliability of bidding are improved, and the safety is greatly improved.
Drawings
FIG. 1 is a flow chart of an electronic bidding method at the third-party device side according to an embodiment of the present disclosure;
fig. 2 is a flowchart of an electronic bidding method at the side of a sponsor device according to an embodiment of the present disclosure;
FIG. 3 is a flow chart of an electronic bidding method at the bidder device side according to an embodiment 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 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
For a better understanding of the technical aspects of the present disclosure, reference is made to the following detailed description taken in conjunction with the accompanying drawings.
In order to construct a decentralized bidding method, random selection is carried out by a decentralized network in the selection link of a bid evaluation expert, and the bidding comparison is realized under the condition of ensuring that the quotation is kept secret forever, even a bid sender can only carry out fair comparison but cannot know the real quotation of the bidder. The present disclosure provides an electronic bidding method, a third party device, a sponsor device and a bidder device. The following detailed description is made with reference to the accompanying drawings which respectively illustrate embodiments provided by the present disclosure.
In the initial stage, the encryption key and the decryption key of each bidder device, each bidder device and each third party device are respectively set, and a corresponding terminal number is prestored in each device.
The bidder device, the tenderer device and the third party device respectively acquire the encryption keys and the terminal numbers of other parties in an off-line or on-line mode in advance. For example, a bidding server or other device is provided that is dedicated to storing the identities, encryption keys, and terminal numbers of the respective bidder, third party, and sponsor devices. In order to avoid tampering of network transmission terminal numbers and the like, the bidding party device, the sending party device and the third party device pre-store own identification, terminal numbers and encryption keys in the bidding server in an offline handling mode. After receiving the bidding document sent by the device of the sending party, the bidding server sends the identification and the encryption key of each device of the sending party, the device of the sending party and the third party device to each party in a short message or message mode.
The following discussion is made in the disclosed embodiment taking as an example a total of three bidder devices (bidder device a, bidder device b, and bidder device c).
Fig. 1 shows a flowchart of an electronic bidding method on the third-party device side provided by the embodiment of the present disclosure. As shown in fig. 1, the electronic bidding method provided by the present embodiment includes the following steps.
Step S101, in response to receiving the random numbers respectively corresponding to each bidder device and the first encryption results sent by each bidder device sent by the sponsor device, respectively decrypting each first encryption result to obtain each second difference.
And S102, determining winning square equipment according to the random numbers and the second difference values.
Step S103, the information of the identified winning bidder device is transmitted to each bidder device.
The first encryption result is generated by the bidder equipment receiving a third encryption result sent by the tenderer equipment, decrypting a first difference value between the other bidder quotations and random numbers corresponding to the other bidder equipment, calculating a second difference value between the first difference value and the quotations of the tenderer equipment and encrypting the second difference value by using an encryption key of the third party equipment.
In the electronic bidding method provided by the embodiment of the disclosure, if the third-party device receives the random number corresponding to each bidding party device and the first encryption result sent by each bidding party device, the random number and the first encryption result are sent by the sending party device, the decryption key of the third-party device is used for decryption, a second difference value is obtained, the size of the bid price of each bidding party device is determined according to each random number and each second difference value, the bidding party device with the highest bid price is determined according to the size of the bid price of each bidding party device and is used as the winning party device, and the third-party device sends the determined information of the winning party device to each bidding party device. The embodiment of the disclosure provides a decentralization bidding method, and the selection link of the bid evaluation expert is also randomly selected by a decentralization network, so that the bid evaluation is realized under the condition of ensuring that the quotation is kept secret forever, all participants know the final bidding result, but cannot know the quotation of other parties. And random numbers are added in the encryption process as interference factors, so that the effective information of other participants is prevented from being deduced reversely, the safety of the bidder is protected, the fairness and the reliability of bidding are improved, and the safety is greatly improved.
In some embodiments, the determining a winning bid square device according to the random numbers and the second difference values (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 any two bidding parties; and determining winning square equipment according to the third difference.
In the disclosed embodiment, the third party device decrypts to obtain the second difference value in the form of B-Rb-A, C-Rc-A, A-Ra-C, B-Rb-C, C-Rc-B, A-Ra-B, and then adds Rb, Rc, Ra to the numbers to obtain the value of the third difference value, namely A-B, B-A, C-A, A-C, B-C, C-B, and the size of the quote (A, B, C) of each bidder device can be sorted according to whether the third difference value is greater than 0 or less than 0, but the specific value of ABC is unknown. According to the sorting result of A, B, C, the price listed at the top is selected as the bidding price, and the bidding party device corresponding to the bidding price is the bidding party device.
Note that a is a bid of the bidder device a, B is a bid of the bidder device B, C is a bid of the bidder device C, Ra is a random number corresponding to the bidder device a, Rb is a random number corresponding to the bidder device B, and Rc is a random number corresponding to the bidder device C.
It should be noted that, in the embodiment of the present disclosure, all the information may be sent to the device in a message manner, or may be sent to the terminal number corresponding to the device in a short message manner.
Fig. 2 is a flowchart illustrating an electronic bidding method at the side of a sponsor device according to an embodiment of the present disclosure. As shown in fig. 2, the electronic bidding method provided by the present embodiment includes the following steps.
In step S201, a random number and a bid amount corresponding to each of the bidder devices are generated.
Step S202, the encryption key of each locally stored bidder device is used for encrypting the corresponding random number to obtain a second encryption result of each bidder device.
Step S203, the bidding document, each second encryption result, and the random number corresponding to each bidding party device are respectively transmitted to the corresponding bidding party device and third party device.
In the electronic bidding method provided by the embodiment of the disclosure, the tenderer device generates random numbers and bidding documents corresponding to each bidder, encrypts the corresponding random numbers by using the locally stored encryption key of each bidder device to obtain second encryption results ea (Ra), eb (Rb), ec (Rc), and sends the bidding documents ea (Ra), eb (Rb), ec (Rc), Ra, Rb and Rc to the corresponding bidder devices, and sends ea (Ra), eb (Rb), ec (Rc), Ra, Rb and Rc to the third party devices. The embodiment of the disclosure provides a decentralization bidding method, and the selection link of the bid evaluation expert is also randomly selected by a decentralization network, so that the bid evaluation is realized under the condition of ensuring that the quotation is kept secret forever, all participants know the final bidding result, but cannot know the quotation of other parties. And random numbers are added in the encryption process as interference factors, so that the effective information of other participants is prevented from being deduced reversely, the safety of the bidder is protected, the fairness and the 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 quotation sent by the bid-winning party equipment, decrypting to obtain the bid-winning quotation; carrying out homomorphic encryption on bid-winning quotation to obtain a first ciphertext; respectively sending the first ciphertext to other bidder devices; responding to the received ciphertext combinations returned by each bidder device, and carrying out homomorphic decryption on each ciphertext combination to obtain each decryption result; and determining whether the winning party equipment is correct or not according to each decryption result.
In the embodiment of the disclosure, if the equipment of the bid-winning party receives the encrypted bid-winning offer sent by the equipment of the bid-winning party, the encrypted bid-winning offer is decrypted to obtain the bid-winning offer. The bidder device may only know bid-winning offers but may not know offers of bidder devices other than the bidding device. The bidding party device encrypts the bid-winning offer to obtain the first ciphertext, and calculates hen (a) (assuming that the bidding party device is the bidding party device a). The issuer device transmits hen (a) to the bidder device b and the bidder device c, respectively. If the sending-side device receives the ciphertext combination [ hen (A) -hen (B) ] hen (Rb) returned by the bidding-side device B and receives the ciphertext combination [ hen (A) -hen (C)) ] hen (Rc) returned by the bidding-side device C, the sending-side device performs homomorphic decryption on the [ hen (A) - (B)) ] hen (Rb) and the [ hen (A) - (C)) ] hen (Rc) respectively to obtain a decryption result (A-B) # Rb and a decryption result (A-C) < Rc). The quotes A, B, C may be sorted according to the sign of (a-B) × Rb and (a-C) × Rc. And if the A is determined to be the maximum value according to the sorting, the fact that the winning party equipment determined by the third party equipment is correct is shown.
If the winning-bid device is bidder device b or bidder device c, it is verified whether the winning-bid device is correct by the same procedure as described above.
It should be noted that, in the embodiment of the present disclosure, all the information may be sent to the device in a message manner, or may be sent to the terminal number corresponding to the device in a short message manner.
Fig. 3 is a flowchart illustrating an electronic bidding method on the bidder device side according to an embodiment of the present disclosure. As shown in fig. 3, the electronic bidding method provided by the present embodiment includes the following steps.
Step S301, in response to receiving the third encryption result sent by the other bidding party device, decrypting the third encryption result to obtain a first difference value between the quotation of the other bidding party device and the random number corresponding to the other bidding party device.
Step S302, a second difference between the first difference and the bid of the local bidder device is calculated.
Step S303, encrypt the second difference value by using the locally stored encryption key of the third-party device, to obtain a first encryption result.
Step S304, sending the first encryption result to the third party device.
The third encryption result is generated after the other bidding party equipment receives the second encryption result sent by the sending party equipment, decrypts the random numbers corresponding to the other bidding party equipment, calculates a first difference value between the other bidding party quotation and the random numbers corresponding to the other bidding party equipment, and encrypts the first difference value by using the encryption key of the bidding party equipment.
In the electronic bidding method provided by the embodiment of the present disclosure, if the bidder device receives the third encryption result sent by the other bidder device, the bidder device decrypts the third encryption result with the decryption key of the bidder device to obtain the first difference "B-Rb" and "C-Rc" (assuming that the bidder device is a), calculates the second difference "B-Rb-a" and "C-Rc-a" between the first difference and the bid price of the bidder device, encrypts the third encryption result with the encryption key of the prestored third sending device to obtain the first encryption result, and sends the first encryption result to the third party device. The embodiment of the disclosure provides a decentralization bidding method, and the selection link of the bid evaluation expert is also randomly selected by a decentralization network, so that the bid evaluation is realized under the condition of ensuring that the quotation is kept secret forever, all participants know the final bidding result, but cannot know the quotation of other parties. And random numbers are added in the encryption process as interference factors, so that the effective information of other participants is prevented from being deduced reversely, the safety of the bidder is protected, the fairness and the reliability of bidding are improved, and the safety is greatly improved.
The same procedure as described above is also executed for the bidder device b and the bidder device c.
In some embodiments, the method further comprises:
in response to the received bidding document and the second encryption result sent by the bidding party equipment, decrypting the second encryption result to obtain a random number corresponding to the bidding party equipment; calculating a first difference value between the quoted price of the bidding party device and the random number corresponding to the bidding party device; encrypting the first difference values by using encryption keys of other bidder devices respectively to obtain third encryption results; and transmitting each third encryption result to other bidder devices and the third party device.
In the embodiment of the present disclosure, if the bidding party device receives the bidding document and the second encryption result sent by the sending party device, the bidding price of the bidding party device is determined according to the bidding document, the bidding party device is decrypted by using the decryption key of the bidding party device to obtain Ra (assuming that the bidding party device is a), the first difference value a-Ra is calculated, the encryption key of the bidding party device b/c is used to encrypt the a-Ra according to the predetermined algorithm to obtain the third encryption result Eb/c (a-Ra), and the Eb/c (a-Ra) is sent to the bidding party device b, the bidding party device c, and the third party device.
The same procedure as described above is also executed for the bidder device b and the bidder device c.
In some embodiments, the method further comprises:
receiving a first ciphertext sent by a caller device; the bidding party performs homomorphic encryption to obtain a second ciphertext, and performs homomorphic encryption to obtain a third ciphertext according to the random number corresponding to the bidding party equipment; generating a ciphertext combination according to the first ciphertext, the second ciphertext and the third ciphertext; the ciphertext combination is returned to the originator device.
In the embodiment of the disclosure, the bidder device B receives hen (a) sent by the bidder device, the quotation B of the bidder device B is encrypted in a homomorphic manner to obtain a second ciphertext hen (B), the random number Rb corresponding to the bidder device B is encrypted in a homomorphic manner to obtain a third ciphertext hen (Rb), a ciphertext combination [ hen (a) -hen (B) ]) hen (Rb) is generated according to a preset algorithm, and the [ hen (a) -hen (B) ]) hen (Rb) is returned to the bidder device. Meanwhile, the bidder device C receives the hen (A) sent by the sending target device, the quotation C of the bidder device C is encrypted in a homomorphic manner to obtain a second ciphertext hen (C), the random number Rc corresponding to the bidder device C is encrypted in a homomorphic manner to obtain 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 sending target device. And verifying whether the winning party equipment determined by the third party equipment is correct or not by the issuing party equipment.
In some embodiments, the method further comprises:
and in response to the fact that the information of the successful bid party device sent by the third party device is received and the information of the successful bid party device is consistent with the information of the bid party device, the encryption key of the bid party device is used for encrypting the successful bid quotation of the bid party device, and the encrypted successful bid quotation is sent to the bid party device. The equipment of the sending party can decrypt the encrypted bid-winning quotation by using the decryption key of the equipment of the sending party to obtain the bid-winning quotation. The bidder device may only know bid-winning offers but may not know offers of bidder devices other than the bidding device.
In a preferred embodiment, each bidder device may also actively acquire information of the winning bidder device from the third party device to determine whether it is the winning bidder device.
It should be noted that, in the embodiment of the present disclosure, all the information may be sent to the device in a message manner, or may be sent to the terminal number corresponding to the device in a short message manner.
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 present disclosure includes the following modules.
The decryption module 11 is configured to decrypt, in response to receiving the random number respectively corresponding to each bidder device sent by the sponsor device and the first encryption result sent by each bidder device, each first encryption result to obtain each second difference value; the first encryption result is generated by the bidder equipment decrypting a first difference value between the quotations of other bidders and random numbers corresponding to the quotations of other bidder equipment after receiving a third encryption result sent by the tenderer equipment, calculating a second difference value between the first difference value and the quotation of the bidder equipment and encrypting the second difference value by using an encryption key of the third party equipment;
a determining module 12, configured to determine winning square equipment according to each of the random numbers and each of the second difference values;
and a sending module 13, configured to send 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 winning square equipment according to the third difference.
Fig. 5 shows a schematic structural diagram of a beacon 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 apparatus for serving a target provided by the embodiment of the present disclosure includes the following modules.
A generating module 21, configured to generate random numbers and bidding documents corresponding to the respective bidder devices;
the first encryption module 22 is configured to encrypt the corresponding random number by using the locally stored encryption key of each bidder device 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 party device to the corresponding bidding party device and the third party device, respectively.
In some embodiments, further comprising:
the first decryption module is used for responding to the encrypted bid-winning quotation sent by the bid-winning party equipment and decrypting to obtain the bid-winning quotation;
the second encryption module is used for homomorphically encrypting the bid-winning quotation to obtain a first ciphertext;
the sending module 23 is further configured to send the first ciphertext to other bidder devices respectively;
the second decryption module is used for responding to the received ciphertext combinations returned by each bidder device and carrying out homomorphic decryption on each ciphertext combination to obtain each decryption result;
and the determining module is used for determining whether the winning party equipment is correct or not according to each decryption result.
FIG. 6 is a schematic structural diagram of a bidder device provided by an embodiment of the 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.
The first decryption module 31 is configured to decrypt a third encryption result sent by another bidder device in response to receiving the third encryption result, so as to obtain a first difference between the quotation of the another bidder device and the random number corresponding to the another bidder device; the third encryption result is generated after the other bidding party equipment receives the second encryption result sent by the sending party equipment, decrypts the random number corresponding to the other bidding party equipment, calculates a first difference value between the other bidding party quotation and the random number corresponding to the other bidding party equipment and encrypts the first difference value by using the encryption key of the local bidding party equipment;
a first calculating module 32, configured to calculate a second difference between the first difference and the offer of the present bidder device;
the first encryption module 33 is configured to encrypt the second difference value by using an encryption key of the third-party device stored locally, so as to obtain a first encryption result;
a sending module 34, configured to send the first encryption result to the third-party device.
In some embodiments, further comprising:
the second decryption module is used for responding to the received bidding document and the second encryption result sent by the bidding party equipment, decrypting the second encryption result and obtaining the random number corresponding to the bidding party equipment;
the second calculation module is used for calculating a first difference value between the quoted price of the bidding party device and the random number corresponding to the bidding party device;
the second encryption module is used for encrypting the first difference values by using encryption keys of other bidder devices respectively to obtain third encryption results;
the sending module 34 is further configured to send each third encrypted result to other bidder devices and third party devices.
In some embodiments, further comprising:
the receiving module is used for receiving a first ciphertext sent by the equipment of the sending party;
the third encryption module is used for homomorphically encrypting the bidding party to obtain a second ciphertext and homomorphically encrypting the random number corresponding to the bidding party device to obtain a third ciphertext;
a generating module, configured to generate 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 originator device.
In some embodiments, further comprising:
the fourth encryption module is used for encrypting the bid-winning quotation of the bidding party device by using the encryption key of the bidding party device in response to the fact that the information of the bid-winning party device sent by the third party device is received and the information of the bid-winning party device is consistent with the information of the bidding party device;
the sending module 34 is further configured to send the encrypted bid-winning offer to the apparatus of the bidding issuer.
It is to be understood that the above embodiments are merely exemplary embodiments that are employed to illustrate the principles of the present disclosure, and that the present disclosure is not limited thereto. It will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the disclosure, and these are to be considered as the scope of the disclosure.
Claims (11)
1. An electronic bidding method, comprising:
respectively decrypting each first encryption result to obtain each second difference value in response to receiving the random number respectively corresponding to each bidder device and the first encryption result sent by each bidder device sent by the tenderer device; the first encryption result is generated by the bidder equipment decrypting a first difference value between the quotations of other bidders and random numbers corresponding to the quotations of other bidder equipment after receiving a third encryption result sent by the tenderer equipment, calculating a second difference value between the first difference value and the quotation of the bidder equipment and encrypting the second difference value by using an encryption key of the third party equipment;
determining winning square equipment according to the random numbers and the second difference values;
and sending the determined information of the winning bidder device to each bidder device.
2. The electronic bidding method according to claim 1, wherein the determining of the winning bid party device according to each of the random numbers and each of the second difference values 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 winning square equipment according to the third difference.
3. An electronic bidding method, comprising:
generating random numbers and bidding documents respectively corresponding to each bidder device;
encrypting the corresponding random number by using the locally stored encryption key of each bidder device to obtain a second encryption result of each bidder device;
and respectively sending 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.
4. The electronic bidding method according to claim 3, wherein the method further comprises:
in response to receiving the encrypted bid-winning quotation sent by the bid-winning party equipment, decrypting to obtain the bid-winning quotation;
encrypting the bid-winning quotation in a homomorphic way to obtain a first ciphertext;
respectively sending the first ciphertext to other bidder devices;
responding to the received ciphertext combinations returned by each bidder device, and carrying out homomorphic decryption on each ciphertext combination to obtain each decryption result;
and determining whether the winning party equipment is correct or not according to each decryption result.
5. An electronic bidding method, comprising:
in response to receiving a third encryption result sent by other bidder equipment, decrypting the third encryption result to obtain a first difference value between the quotation of the other bidder equipment and the random number corresponding to the other bidder equipment; the third encryption result is generated after the other bidding party equipment receives the second encryption result sent by the sending party equipment, decrypts the random number corresponding to the other bidding party equipment, calculates a first difference value between the other bidding party quotation and the random number corresponding to the other bidding party equipment and encrypts the first difference value by using the encryption key of the local bidding party equipment;
calculating a second difference value between the first difference value and the quoted price of the device of the bidding party;
encrypting the second difference value by using an encryption key of the locally stored third-party equipment to obtain a first encryption result;
and sending the first encryption result to the third-party equipment.
6. The electronic bidding method according to claim 5, wherein the method further comprises:
in response to the received bidding document and the second encryption result sent by the bidding party equipment, decrypting the second encryption result to obtain a random number corresponding to the bidding party equipment;
calculating a first difference value between the quoted price of the bidding party device and the random number corresponding to the bidding party device;
encrypting the first difference values by using encryption keys of other bidder devices respectively to obtain third encryption results;
and transmitting each third encryption result to other bidder devices and the third party device.
7. The electronic bidding method according to claim 5, wherein the method further comprises:
receiving a first ciphertext sent by a caller device;
the bidding party performs homomorphic encryption to obtain a second ciphertext, and performs homomorphic encryption to obtain a third ciphertext according to the random number corresponding to the bidding party equipment;
generating a ciphertext combination according to the first ciphertext, the second ciphertext and the third ciphertext;
and returning the ciphertext combination to the sending party equipment.
8. The electronic bidding method according to claim 7, wherein the method further comprises:
and in response to the fact that the information of the successful bid party device sent by the third party device is received and the information of the successful bid party device is consistent with the information of the bid party device, the encryption key of the bid party device is used for encrypting the successful bid quotation of the bid party device, and the encrypted successful bid quotation is sent to the bid party device.
9. A third party device, comprising:
the decryption module is used for responding to the received random numbers respectively corresponding to the bidding party devices and the first encryption results sent by the bidding party devices and respectively decrypting the first encryption results to obtain second difference values; the first encryption result is generated by the bidder equipment decrypting a first difference value between the quotations of other bidders and random numbers corresponding to the quotations of other bidder equipment after receiving a third encryption result sent by the tenderer equipment, calculating a second difference value between the first difference value and the quotation of the bidder equipment and encrypting the second difference value by using an encryption key of the third party equipment;
the determining module is used for determining winning square equipment according to the random numbers and the second difference values;
and the sending module is used for sending the determined information of the successful bidder equipment to each bidder equipment.
10. A caller device, comprising:
the generation module is used for generating random numbers and bidding documents respectively corresponding to each bidder device;
the encryption module is used for encrypting the corresponding random number by using the locally stored encryption key of each bidder device to obtain a second encryption result of each bidder device;
and the sending module is used for sending 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.
11. A bidder device, comprising:
the decryption module is used for responding to the third encryption result sent by other bidding party equipment and decrypting the third encryption result to obtain a first difference value between 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 sending party equipment, decrypts the random number corresponding to the other bidding party equipment, calculates a first difference value between the other bidding party quotation and the random number corresponding to the other bidding party equipment and encrypts the first difference value by using the encryption key of the local bidding party equipment;
the calculating module is used for calculating a second difference value between the first difference value and the quoted price of the bidding party equipment;
the encryption module is used for encrypting the second difference value by using an 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110559302.2A CN113191862B (en) | 2021-05-21 | 2021-05-21 | Electronic bidding method, third party device, bidding party device and bidding party device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110559302.2A CN113191862B (en) | 2021-05-21 | 2021-05-21 | Electronic bidding method, third party device, bidding party device and bidding party device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113191862A true CN113191862A (en) | 2021-07-30 |
| CN113191862B CN113191862B (en) | 2023-06-13 |
Family
ID=76984636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110559302.2A Active CN113191862B (en) | 2021-05-21 | 2021-05-21 | Electronic bidding method, third party device, bidding party device and bidding party device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113191862B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115906140A (en) * | 2023-01-05 | 2023-04-04 | 中国联合网络通信集团有限公司 | Bidding data processing method, device, equipment and storage medium |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180108087A1 (en) * | 2011-04-21 | 2018-04-19 | Richard L. Sandor | Method and system for determining market estimates with market based measures |
| CN110472426A (en) * | 2019-08-02 | 2019-11-19 | 南京鑫智链科技信息有限公司 | A kind of scanning encryption and decryption tender documents method replacing U-shield in kind |
| CN110827121A (en) * | 2019-10-22 | 2020-02-21 | 全链通有限公司 | Block chain-based electronic bidding method, device 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 |
| CN111538479A (en) * | 2020-04-27 | 2020-08-14 | 国泰新点软件股份有限公司 | Random parameter generation method and device in label opening process |
| CN112184294A (en) * | 2020-09-08 | 2021-01-05 | 上海交通大学 | Practical reinforced learning automata method for optimizing quotation of limited information generator |
| CN112288523A (en) * | 2020-10-29 | 2021-01-29 | 中国银联股份有限公司 | Block chain based numerical ranking method and device |
-
2021
- 2021-05-21 CN CN202110559302.2A patent/CN113191862B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180108087A1 (en) * | 2011-04-21 | 2018-04-19 | Richard L. Sandor | Method and system for determining market estimates with market based measures |
| CN110472426A (en) * | 2019-08-02 | 2019-11-19 | 南京鑫智链科技信息有限公司 | A kind of scanning encryption and decryption tender documents method replacing U-shield in kind |
| CN110827121A (en) * | 2019-10-22 | 2020-02-21 | 全链通有限公司 | Block chain-based electronic bidding method, device 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 |
| CN111538479A (en) * | 2020-04-27 | 2020-08-14 | 国泰新点软件股份有限公司 | Random parameter generation method and device in label opening process |
| CN112184294A (en) * | 2020-09-08 | 2021-01-05 | 上海交通大学 | Practical reinforced learning automata method for optimizing quotation of limited information generator |
| CN112288523A (en) * | 2020-10-29 | 2021-01-29 | 中国银联股份有限公司 | Block chain based numerical ranking method and device |
Non-Patent Citations (3)
| Title |
|---|
| TURABEK GAYBULLAEV 等: "Efficient and Privacy-Preserving Energy Trading on Blockchain Using Dual Binary Encoding for Inner Product Encryption", 《SENSORS》, vol. 21, no. 6, pages 1 - 26 * |
| 石润华 等: "一种有效的量子密封投标拍卖协议", 《信息网络安全》, no. 8, pages 44 - 50 * |
| 罗羲: "基于综合评估法的工程投标报价策略研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》, no. 1, pages 038 - 13 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115906140A (en) * | 2023-01-05 | 2023-04-04 | 中国联合网络通信集团有限公司 | Bidding data processing method, device, equipment and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113191862B (en) | 2023-06-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106603233B (en) | Encryption and decryption method for remote bid opening type bidding system | |
| CN113191863B (en) | Bid method, third party device, bid issuing party device and bid issuing party device | |
| KR0148300B1 (en) | Method for sharing secret information, generating a digital signature, and performing certification in a communication system that has a plurality of information processing apparatus and a communication system that employs such a method | |
| AU655304B2 (en) | Algorithm independent cryptographic key management | |
| US6298153B1 (en) | Digital signature method and information communication system and apparatus using such method | |
| CN108599925A (en) | A kind of modified AKA identity authorization systems and method based on quantum communication network | |
| CN103716167A (en) | Method and device for safely collecting and distributing transmission keys | |
| JPH04213242A (en) | Limited multiple address communication system | |
| CN109347627A (en) | Data encryption/decryption method, device, computer equipment and storage medium | |
| US6052787A (en) | Process for group-based cryptographic code management between a first computer unit and group computer units | |
| CN111769938B (en) | Key management system and data verification system of block chain sensor | |
| EP0225010B1 (en) | A terminal for a system requiring secure access | |
| CN103493428A (en) | Data encryption | |
| CN109962924B (en) | Group chat construction method, group message sending method, group message receiving method and system | |
| CN108718237A (en) | A kind of modified AKA identity authorization systems and method based on pool of symmetric keys | |
| CN111404671B (en) | Mobile quantum secret communication method, gateway, mobile terminal and server | |
| CN113191862B (en) | Electronic bidding method, third party device, bidding party device and bidding party device | |
| Yi et al. | A secure and efficient conference scheme for mobile communications | |
| CN111861485A (en) | Block chain-based digital currency control method and equipment | |
| CN113285798B (en) | Data processing method, bidding terminal equipment and computer readable medium | |
| CN115941773A (en) | Project transaction method, system, terminal device and medium based on cloud service sharing | |
| CN111526131B (en) | Anti-quantum-computation electronic official document transmission method and system based on secret sharing and quantum communication service station | |
| JP5004086B2 (en) | Authentication system using short sequences | |
| CN115344882A (en) | Multi-party computing method, device and storage medium based on trusted computing environment | |
| CN111639943A (en) | Digital currency transaction method and system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |