CN114881781A - Safe transaction system and method based on block chain technology - Google Patents
Safe transaction system and method based on block chain technology Download PDFInfo
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Abstract
The invention discloses a safe transaction system and a safe transaction method based on a block chain technology, and belongs to the technical field of computer safety. The invention comprises the following steps: the method comprises the following steps: the transaction initiator, the transaction requester and the transaction supervisor are connected through building a block chain, the transaction initiator digitally displays the transaction product and the transaction protocol, and the transaction supervisor evaluates the working accuracy of the transaction product and the risk degree of the transaction protocol based on the display content; step two: the transaction supervisor predicts a risk range which can be borne by the transaction requester according to transaction request information sent by the transaction requester, purchasing power of the transaction requester and purchasing use; step three: matching a corresponding transaction initiator for the transaction requester based on the prediction result, and after the matching is successful, the transaction supervisor sends a transaction public key and a transaction private key to the transaction requester and the transaction initiator; step four: and setting a plurality of block chain nodes on a block chain set up between a transaction requester and a transaction initiator.
Description
Technical Field
The invention relates to the technical field of computer security, in particular to a safe transaction system and a safe transaction method based on a block chain technology.
Background
The transaction safety is that in the transaction process, transaction benefits are obtained based on effective transaction behaviors to guarantee benefits of the good parties, transaction efficiency and transaction order, however, in the current digital transaction, transaction data is easy to leak, and the transaction safety cannot be effectively guaranteed.
When the transaction is carried out between a transaction request party and a transaction initiator, the prior safe transaction system can not predict the transaction risk range born by the transaction request party in the transaction process and the transaction protocol reasonableness issued by the transaction initiator, so that the transaction request party and the transaction initiator have transaction destruction behaviors when the transaction is completed, further the transaction request party and the transaction initiator can leak information of the other party due to the destruction behaviors and threaten the safety of the transaction party, and the transaction request party and the transaction initiator can not match the best transactor for the transaction request party and the transaction initiator when the transaction is carried out in the safe transaction system, thereby reducing the transaction amount of the safe transaction system, directly contacting the transaction request party and the transaction initiator in the transaction process, and a transaction competition party can obtain the information of the transactants through the communication information of the transaction request party and the transaction initiator, thereby causing illegal competition and being unfavorable for the formation of a safe transaction environment.
Disclosure of Invention
The present invention is directed to a system and method for secure transaction based on block chain technology, so as to solve the problems mentioned in the background art.
In order to solve the technical problems, the invention provides the following technical scheme: a secure transaction method based on blockchain technology, the method comprising the steps of:
the method comprises the following steps: the transaction initiator, the transaction requester and the transaction supervisor are connected through building a block chain, the transaction initiator digitally displays the transaction product and the transaction protocol, and the transaction supervisor evaluates the working accuracy of the transaction product and the risk degree of the transaction protocol based on the display content;
step two: the transaction supervisor predicts a risk range which can be borne by the transaction requester according to transaction request information sent by the transaction requester, purchasing power of the transaction requester and purchasing use;
step three: matching a corresponding transaction initiator for the transaction requester based on the prediction result, and after the matching is successful, sending a transaction public key and a transaction private key to the transaction initiator and the transaction requester by the transaction supervisor;
step four: the method comprises the steps that a plurality of block chain nodes are arranged on a block chain built between a transaction request party and a transaction initiator, the transaction request party and the transaction initiator pass through each block chain node through a public key, transaction information and a private key, when the transaction is terminated by the transaction party, block chain nodes are self-locked, and a block chain channel built between the transaction request party and the transaction initiator is interrupted.
Further, in the first step, the transaction supervisor evaluates the working accuracy of the transaction product and the risk degree of the transaction agreement based on the display content, and the specific evaluation method is as follows:
1) matching and comparing the digital information of the transaction product with the standard digital information corresponding to the product, evaluating the chromaticity, the size and the pattern similarity of the transaction product, and calculating the working precision of the transaction product based on the evaluation result, wherein a specific calculation formula A is as follows:
A＝α*m+β*n+δ*k；
wherein α, β, δ are proportionality coefficients, α + β + δ is 1, m represents chromaticity similarity between the transaction product and the genuine product, n represents size similarity between the transaction product and the genuine product, and k represents pattern similarity between the transaction product and the genuine product;
2) acquiring description information and selling price information of a transaction product in a transaction protocol;
3) evaluating the risk degree of the transaction agreement based on the calculation result in 1) and the information obtained in 2), wherein the method comprises the following steps:
comparing the description information of the transaction product in the transaction agreement with the results of the similarity of the chromaticity, the size and the pattern of the transaction product in the transaction agreement 1), and evaluating the reasonability of the description information of the transaction product in the transaction agreement;
and secondly, predicting the selling price information of the transaction product based on the evaluation result and the working precision of the transaction product, comparing the prediction result with the selling price information of the transaction product in the transaction agreement, and evaluating the risk degree of the transaction agreement.
Further, the transaction supervisor predicts a risk range that the transaction requester can bear according to transaction request information sent by the transaction requester, purchasing power of the transaction requester and purchasing use, and the specific method is as follows:
(1) primarily screening the transaction products according to transaction request information sent by a transaction requesting party, secondarily screening the transaction products according to the transaction agreement risk degree, and acquiring information of the transaction products after the two-time screening;
(2) predicting the accumulated risk of the transaction product according to the expected using time of the transaction requester for purchasing the transaction product, wherein a specific prediction formula S is as follows:
wherein d represents the risk degree of the transaction product corresponding to the transaction agreement, t is 1,2, …, n represents the expected service life of the transaction requester for purchasing the transaction product, A represents the working accuracy of the transaction product,
indicating the corresponding work-making precision of the transaction request party after the expected service life of the transaction product,
indicating that the transaction product is being worked less accurately
Only when the product is traded will cumulative risk occur, A-j t A denotes the prediction of the work accuracy of the transaction product in the t year;
the transaction product information is sorted according to the accumulated risk degree, the risk range which can be borne by the transaction request party is predicted based on the purchasing power of the transaction request party, and the higher the purchasing power of the transaction request party is, the lower the corresponding risk bearing range is;
(3) and matching the optimal transaction initiator for the transaction requester in the cumulative risk degree ranking according to the predicted risk range that the transaction requester can bear.
Further, in the fourth step, the transaction requester and the transaction initiator pass through each block chain node through the public key, the transaction information, and the private key, and the specific method is as follows:
step 1: after the transaction requester and the transaction initiator are successfully matched, the transaction supervisor transmits the public key, the reasonability evaluation result of the transaction protocol of the transaction initiator and the accumulated risk prediction result of the transaction product to the transaction requester in sequence, and transmits the public key, the risk range which can be borne by the transaction requester and the purchasing power of the transaction product to the transaction initiator in sequence;
step 2: the transaction request party and the transaction initiator sequentially pass through the first block chain node, the second block chain node and the third block chain node according to the information transmitted in Step 1;
step 3: when a transaction request party and a transaction initiator pass through each blockchain node, if the transaction request party or the transaction initiator is not satisfied with information transmitted by a transaction supervisor, the transaction request party or the transaction initiator inputs an error key, after the error key is input, self-locking is realized by corresponding blockchain nodes, and the transaction of the transaction request party and the transaction initiator is terminated, so that the situation that a transaction opposite party easily acquires information of a transaction terminating party when the transaction of the transaction party is terminated and the acquired information is leaked to other transaction parties is avoided, the security of the transaction information of the transaction terminating party is reduced, and by arranging a plurality of blockchain nodes, the information of the transaction request party and the transaction initiator can be known in detail, and the transaction security is improved;
step 4: if the transaction request party or the transaction initiator smoothly passes through each block chain node, the transaction supervisor party sends the private key to the transaction request party and the transaction initiator, the private key dynamically changes according to the contact time of the transaction request party and the transaction initiator, when the transaction request party and the transaction initiator confirm the transaction, after the dynamic private key is input at the last block chain node, after the dynamic private key is input by the transaction request party and the transaction initiator, the transaction request party and the transaction initiator carry out effective transaction, and after the transaction is completed, each block chain node is automatically locked.
Further, in the fourth step, if the transaction requester or the transaction initiator inputs an incorrect key due to the reason of the transaction requester or the transaction initiator, the transaction requester or the transaction initiator initiates a help request to the transaction supervisor within a specified time, and the transaction supervisor opens the block link point in the self-locking state.
A safe transaction system based on a block chain technology comprises a transaction initiator risk degree evaluation module, a transaction requester risk tolerance prediction module, a transaction matching module and a transaction execution module;
the transaction initiator risk degree evaluation module is used for evaluating the working accuracy of transaction products and the risk degree of a transaction protocol and transmitting an evaluation result to the transaction requester risk tolerance prediction module;
the transaction requester risk tolerance prediction module is used for predicting a risk range which can be borne by the transaction requester according to transaction request information sent by the transaction requester, purchasing power of the transaction requester and purchasing use, and transmitting a prediction result to the transaction matching module;
the transaction matching module is used for receiving the evaluation result transmitted by the transaction initiator risk degree evaluation module and the prediction result transmitted by the transaction requester risk tolerance prediction module, matching the corresponding transaction initiator for the transaction requester according to the received content, and transmitting the matching result and the evaluation result to the transaction execution module;
the transaction execution module is used for receiving the matching result and the evaluation result transmitted by the transaction matching module, and the transaction requester and the transaction initiator decide whether to carry out effective transaction based on the received content.
Further, the transaction initiator risk degree evaluation module comprises a transaction product working precision prediction unit, a transaction product information acquisition unit and a transaction agreement risk degree evaluation unit;
the transaction product working precision prediction unit matches and compares the transaction product digital information with the standard digital information corresponding to the transaction product, evaluates the chromaticity, the size and the pattern similarity of the transaction product, predicts the working precision of the transaction product based on the evaluation result, and transmits the prediction result and the evaluation result to the transaction protocol risk degree evaluation unit;
the transaction product information acquisition unit acquires description information and selling price information of a transaction product in a transaction agreement and transmits the acquired information to the transaction agreement risk degree evaluation unit;
the transaction agreement risk degree evaluation unit receives the prediction result and the evaluation result transmitted by the transaction product working precision prediction unit and the acquisition information transmitted by the transaction product information acquisition unit, compares the description information of the transaction product in the transaction agreement with the chromaticity, size and pattern similarity result of the transaction product, evaluates the reasonability of the description information of the transaction product in the transaction agreement, predicts the selling price information of the transaction product based on the reasonability evaluation result of the description information of the transaction product and the working precision of the transaction product, compares the prediction result with the selling price information of the transaction product in the transaction agreement, evaluates the risk degree of the transaction agreement, and transmits the evaluated risk degree of the transaction agreement to the transaction requester risk tolerance prediction module.
Furthermore, the transaction requester risk tolerance prediction module comprises a transaction product screening unit, a transaction product accumulation risk prediction unit and a transaction requester risk tolerance prediction unit;
the transaction product screening unit receives the evaluation result transmitted by the transaction agreement risk degree evaluation unit, preliminarily screens the transaction product according to transaction request information sent by a transaction requester, secondarily screens the transaction product according to the transaction agreement risk degree, acquires the information of the transaction product after twice screening, and transmits the acquired information to the transaction product accumulated risk prediction unit;
the transaction product accumulation risk prediction unit receives the acquired information transmitted by the transaction product screening unit and constructs a prediction model according to expected use time of the transaction product purchased by the transaction requester
Predicting the accumulated risk of the screened transaction products, wherein d represents the risk degree of the transaction products corresponding to the transaction agreement, t is 1,2, …, n represents the expected service life of the transaction requester for purchasing the transaction products, A represents the working accuracy of the transaction products,
indicating the corresponding work-making precision of the transaction request party after the expected service life of the transaction product,
indicating that the transacted product is doing less accurately than
Only when the product is traded will cumulative risk occur, A-j t A represents that the work-making precision of the transaction product in the t year is predicted, and the prediction result is transmitted to a risk tolerance prediction unit of a transaction requester;
the transaction requester risk tolerance prediction unit receives the transaction product accumulated risk prediction result transmitted by the transaction product accumulated risk prediction unit, predicts a risk range which can be borne by the transaction requester based on the purchasing power of the transaction requester, and transmits the transaction product accumulated risk prediction result and the risk range prediction result which can be borne by the transaction requester to the transaction matching module.
Further, the transaction matching module receives a transaction product accumulated risk prediction result transmitted by the transaction requester risk tolerance prediction unit and a risk range prediction result that the transaction requester can bear, sorts transaction product information according to accumulated risk tolerance, matches an optimal transaction initiator for the transaction requester in the accumulated risk tolerance sorting according to the predicted risk range that the transaction requester can bear, and transmits the matching result to the transaction execution module.
Further, the transaction execution module comprises a key acquisition unit, a block chain node passing unit and a transaction execution unit;
the key acquisition unit receives the matching result transmitted by the transaction matching module, the transaction supervisor transmits the public key, the reasonability evaluation result of the transaction protocol of the transaction initiator and the accumulated risk prediction result of the transaction product to the transaction requester in sequence based on the matching result, the transaction supervisor transmits the public key, the risk range which can be born by the transaction requester and the purchasing power of the transaction product to the transaction initiator in sequence based on the matching result, and transmits the information received by the transaction requester and the transaction initiator to the block link point passing unit;
the block chain node receives the transaction request party and transaction initiator receiving information transmitted by the key acquisition unit through the unit, and sequentially passes through the first block chain node, the second block chain node and the third block chain node according to the receiving information sequence, if the transaction request party or the transaction initiator is not satisfied with the information transmitted by the transaction supervisor, the transaction request party or the transaction initiator inputs an error key, after the error key is input, the corresponding block chain link points realize self-locking, the transaction request party and the transaction initiator terminate the transaction, and the block chain link point self-locking information is transmitted to the transaction execution unit;
the transaction execution unit receives the block link point self-locking information transmitted by the block link point passing unit, when the block link point is not locked, the transaction supervisor sends a private key to the transaction requester and the transaction initiator, the private key dynamically changes according to the contact time of the transaction requester and the transaction initiator, when the transaction requester and the transaction initiator confirm the transaction, after the dynamic private key is input at the fourth block link point, after the dynamic private key is input by the transaction requester and the transaction initiator, the transaction requester and the transaction initiator carry out effective transaction, and after the transaction is completed, each block link point is automatically locked.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention evaluates the risk degree of a transaction agreement issued by a transaction initiator by calculating the working precision of the transaction product of the transaction initiator, based on the calculation result, the description information and the selling price information of the transaction product, screens the transaction product by the risk degree evaluation result of the transaction agreement and the transaction request information issued by the transaction requester, constructs a prediction model according to the expected use time of the transaction product purchased by the transaction requester, predicts the accumulated risk of the screened transaction product, matches the optimal transaction initiator for the transaction requester based on the risk range which the transaction requester can bear, ensures that the transaction requester and the transaction initiator accurately know the information of the transaction party in the transaction process, avoids the existence of transaction damage behavior, and further reduces the possibility that the transaction requester and the transaction initiator leak the information of the other party, and ensuring the information security of the transaction party.
2. According to the invention, the related information of the transaction request party and the transaction initiator is predicted, and the optimal trader is matched for the transaction request party and the transaction initiator based on the prediction result, so that the transaction amount of the safe transaction system is further improved, and the transaction stability of the safe transaction system is further improved.
3. After the transaction requester and the transaction initiator are successfully matched, the transaction supervisor transmits the public key, the reasonability evaluation result of the transaction protocol of the transaction initiator and the accumulated risk prediction result of the transaction product to the transaction requester in sequence, transmits the public key, the risk range which the transaction requester can bear and the purchasing power of the transaction product to the transaction initiator in sequence, inputs an error key when the transaction requester or the transaction initiator is not satisfied with the information transmitted by the transaction supervisor according to the received information and sequentially passes through the first block chain node, the second block chain node and the third block chain node, so that self-locking of the corresponding block chain nodes is realized to terminate the transaction, the transaction requester and the transaction initiator cannot know specific information of the transactor in the process, and the transaction competitor cannot know related information before the transaction is successful, and the possibility that the transaction competitor acquires the information of the transaction requester and the transaction initiator through the blockchain is reduced through the self-locking function of the blockchain nodes, thereby further reducing illegal competition behaviors and being beneficial to forming a safe transaction environment.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram illustrating the operation of a system and method for secure transaction based on blockchain technology according to the present invention;
fig. 2 is a schematic structural diagram of an operation principle of the secure transaction system and method based on the blockchain technology according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 and 2, the present invention provides a technical solution: a safe transaction method based on block chain technology is characterized in that: the method comprises the following steps:
the method comprises the following steps: the transaction initiator, the transaction requester and the transaction supervisor are connected through building a block chain, the transaction initiator digitally displays a transaction product and a transaction protocol, the transaction supervisor evaluates the working accuracy of the transaction product and the risk degree of the transaction protocol based on display contents, and the specific evaluation method comprises the following steps:
1) matching and comparing the digital information of the transaction product with the standard digital information corresponding to the transaction product, evaluating the chromaticity, the size and the pattern similarity of the transaction product, and calculating the working precision of the transaction product based on an evaluation result, wherein a specific calculation formula A is as follows:
A＝α*m+β*n+δ*k；
wherein α, β, δ are proportionality coefficients, α + β + δ is 1, m represents chromaticity similarity between the transaction product and the genuine product, n represents size similarity between the transaction product and the genuine product, and k represents pattern similarity between the transaction product and the genuine product;
2) acquiring description information and selling price information of a transaction product in a transaction protocol;
3) evaluating the risk degree of the transaction agreement based on the calculation result in 1) and the information obtained in 2), wherein the method specifically comprises the following steps:
comparing description information of the transaction product in the transaction agreement with the result of the similarity of the chromaticity, the size and the pattern of the transaction product in the step 1), and evaluating the reasonableness of the description information of the transaction product in the transaction agreement;
predicting the selling price information of the trading product based on the evaluation result and the working accuracy of the trading product, comparing the prediction result with the selling price information of the trading product in the trading agreement, and evaluating the risk degree of the trading agreement;
step two: the transaction supervisor predicts the risk range that the transaction requester can bear according to the transaction request information sent by the transaction requester, the purchasing power of the transaction requester and the purchasing purpose, and the specific method comprises the following steps:
(1) primarily screening the transaction products according to transaction request information sent by a transaction requesting party, secondarily screening the transaction products according to the transaction agreement risk degree, and acquiring information of the transaction products after the two-time screening;
(2) predicting the accumulated risk of the transaction product according to the expected using time of the transaction requester for purchasing the transaction product, wherein a specific prediction formula S is as follows:
wherein d represents the risk degree of the transaction product corresponding to the transaction agreement, t is 1,2, …, n represents the expected service life of the transaction product purchased by the transaction requester, A represents the working accuracy of the transaction product,
indicating the corresponding work-making precision of the transaction request party after the expected service life of the transaction product,
indicating that the transaction product is being worked less accurately
Only when the product is traded will cumulative risk occur, A-j t A denotes the prediction of the work accuracy of the transaction product in the t year;
the transaction product information is sorted according to the accumulated risk degree, the risk range which can be borne by the transaction request party is predicted based on the purchasing power of the transaction request party, and the higher the purchasing power of the transaction request party is, the lower the corresponding risk bearing range is;
(3) matching an optimal transaction initiator for the transaction requester in the accumulated risk degree ranking according to the predicted risk range that the transaction requester can bear;
step three: matching a corresponding transaction initiator for the transaction requester based on the prediction result, and after the matching is successful, sending a transaction public key and a transaction private key to the transaction initiator and the transaction requester by the transaction supervisor;
step four: the method comprises the following steps that a plurality of block chain nodes are arranged on a block chain built between a transaction request party and a transaction initiator, the transaction request party and the transaction initiator pass through the block chain nodes through a public key, transaction information and a private key, when the transaction is terminated by the transaction party, the block chain nodes are self-locked, a block chain channel built between the transaction request party and the transaction initiator is interrupted, and the transaction request party and the transaction initiator pass through the block chain nodes through the public key, the transaction information and the private key, and the specific method comprises the following steps:
step 1: after the transaction requester and the transaction initiator are successfully matched, the transaction supervisor transmits the public key, the reasonability evaluation result of the transaction protocol of the transaction initiator and the accumulated risk prediction result of the transaction product to the transaction requester in sequence, and transmits the public key, the risk range which can be borne by the transaction requester and the purchasing power of the transaction product to the transaction initiator in sequence;
step 2: the transaction request party and the transaction initiator sequentially pass through the first block chain node, the second block chain node and the third block chain node according to the information transmitted in Step 1;
step 3: when a transaction request party and a transaction initiator pass through each blockchain node, if the transaction request party or the transaction initiator is not satisfied with information transmitted by a transaction supervisor, the transaction request party or the transaction initiator inputs an error key, after the error key is input, self-locking is realized by corresponding blockchain nodes, and the transaction of the transaction request party and the transaction initiator is terminated, so that the situation that a transaction opposite party easily acquires information of a transaction terminating party when the transaction of the transaction party is terminated and the acquired information is leaked to other transaction parties is avoided, the security of the transaction information of the transaction terminating party is reduced, and by arranging a plurality of blockchain nodes, the information of the transaction request party and the transaction initiator can be known in detail, and the transaction security is improved;
step 4: if the transaction request party or the transaction initiator smoothly passes through each block chain node, the transaction supervisor party sends the private key to the transaction request party and the transaction initiator, the private key dynamically changes according to the contact time of the transaction request party and the transaction initiator, when the transaction request party and the transaction initiator confirm the transaction, the transaction request party and the transaction initiator carry out effective transaction after the dynamic private key is input at the last block chain node, and after the dynamic private key is input by the transaction request party and the transaction initiator, each block chain node is automatically locked after the transaction is completed;
if the transaction request party or the transaction initiator inputs an error key due to self reasons, the transaction request party or the transaction initiator initiates a help request to the transaction supervisor within a specified time, and the transaction supervisor opens the block chain link point in the self-locking state.
A safe transaction system based on block chain technology comprises a transaction initiator risk degree evaluation module, a transaction requester risk tolerance prediction module, a transaction matching module and a transaction execution module;
the transaction initiator risk degree evaluation module is used for evaluating the working accuracy of the transaction product and the risk degree of the transaction protocol and transmitting the evaluation result to the transaction requester risk tolerance prediction module;
the transaction initiator risk degree evaluation module comprises a transaction product working precision prediction unit, a transaction product information acquisition unit and a transaction agreement risk degree evaluation unit;
the transaction product working precision prediction unit matches and compares the transaction product digital information with the standard digital information corresponding to the product, evaluates the chromaticity, the size and the pattern similarity of the transaction product, predicts the working precision of the transaction product based on the evaluation result, and transmits the prediction result and the evaluation result to the transaction protocol risk degree evaluation unit;
the transaction product information acquisition unit acquires description information and selling price information of a transaction product in a transaction agreement and transmits the acquired information to the transaction agreement risk degree evaluation unit;
the transaction agreement risk degree evaluation unit receives the prediction result and the evaluation result transmitted by the transaction product working precision prediction unit and the acquisition information transmitted by the transaction product information acquisition unit, compares the description information of the transaction product in the transaction agreement with the chromaticity, size and pattern similarity result of the transaction product, evaluates the reasonability of the description information of the transaction product in the transaction agreement, predicts the selling price information of the transaction product based on the reasonability evaluation result of the description information of the transaction product and the working precision of the transaction product, compares the prediction result with the selling price information of the transaction product in the transaction agreement, evaluates the risk degree of the transaction agreement, and transmits the evaluated risk degree of the transaction agreement to the transaction requester risk tolerance prediction module;
the transaction requester risk tolerance prediction module is used for predicting a risk range which can be borne by the transaction requester according to transaction request information sent by the transaction requester, purchasing power of the transaction requester and purchasing use, and transmitting a prediction result to the transaction matching module;
the transaction requester risk tolerance prediction module comprises a transaction product screening unit, a transaction product accumulation risk prediction unit and a transaction requester risk tolerance prediction unit;
the transaction product screening unit receives the evaluation result transmitted by the transaction agreement risk degree evaluation unit, preliminarily screens the transaction product according to transaction request information sent by a transaction requester, secondarily screens the transaction product according to the transaction agreement risk degree, acquires the information of the transaction product after twice screening, and transmits the acquired information to the transaction product accumulated risk prediction unit;
the transaction product accumulation risk prediction unit receives the acquired information transmitted by the transaction product screening unit and constructs a prediction model according to expected use time of the transaction product purchased by the transaction requester
the transaction requester risk tolerance prediction unit receives a transaction product accumulated risk prediction result transmitted by the transaction product accumulated risk prediction unit, predicts a risk range which can be borne by the transaction requester based on purchasing power of the transaction requester, and transmits the transaction product accumulated risk prediction result and the risk range prediction result which can be borne by the transaction requester to the transaction matching module;
the transaction matching module is used for receiving a transaction product accumulated risk prediction result transmitted by the transaction requester risk tolerance prediction unit and a risk range prediction result born by the transaction requester, sorting the transaction product information according to the accumulated risk tolerance, matching an optimal transaction initiator for the transaction requester in the accumulated risk tolerance sorting according to the predicted risk range born by the transaction requester, and transmitting the matching result to the transaction execution module;
the transaction execution module is used for receiving the matching result and the evaluation result transmitted by the transaction matching module, and the transaction request party and the transaction initiator determine whether to carry out effective transaction based on the received content;
the transaction execution module comprises a key acquisition unit, a block chain link point passing unit and a transaction execution unit;
the key acquisition unit receives the matching result transmitted by the transaction matching module, the transaction supervisor transmits the public key, the reasonability evaluation result of the transaction protocol of the transaction initiator and the accumulated risk prediction result of the transaction product to the transaction requester in sequence based on the matching result, the transaction supervisor transmits the public key, the risk range which can be born by the transaction requester and the purchasing power of the transaction product to the transaction initiator in sequence based on the matching result, and transmits the information received by the transaction requester and the transaction initiator to the block link point passing unit;
the block chain node receives the transaction request party and the transaction initiator receiving information transmitted by the key acquisition unit through the unit, sequentially passes through the first block chain node, the second block chain node and the third block chain node according to the receiving information sequence, if the transaction request party or the transaction initiator is not satisfied with the information transmitted by the transaction supervisor, the transaction request party or the transaction initiator inputs an error key, after the error key is input, the corresponding block chain link points realize self-locking, the transaction request party and the transaction initiator terminate the transaction, and the block chain link point self-locking information is transmitted to the transaction execution unit;
the transaction execution unit receives the block link point self-locking information transmitted by the block link point passing unit, when the block link point is not locked, the transaction supervisor sends the private key to the transaction requester and the transaction initiator, the private key dynamically changes according to the contact time of the transaction requester and the transaction initiator, when the transaction requester and the transaction initiator confirm the transaction, after the dynamic private key is input by the fourth block link point, after the dynamic private key is input by the transaction requester and the transaction initiator, the transaction requester and the transaction initiator carry out effective transaction, and after the transaction is completed, each block link point is automatically locked.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described above, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A safe transaction method based on block chain technology is characterized in that: the method comprises the following steps:
the method comprises the following steps: the transaction initiator, the transaction requester and the transaction supervisor are connected through building a block chain, the transaction initiator digitally displays the transaction product and the transaction protocol, and the transaction supervisor evaluates the working accuracy of the transaction product and the risk degree of the transaction protocol based on the display content;
step two: the transaction supervisor predicts a risk range which can be borne by the transaction requester according to transaction request information sent by the transaction requester, purchasing power of the transaction requester and purchasing use;
step three: matching a corresponding transaction initiator for the transaction requester based on the prediction result, and after the matching is successful, sending a transaction public key and a transaction private key to the transaction initiator and the transaction requester by the transaction supervisor;
step four: the method comprises the steps that a plurality of block chain nodes are arranged on a block chain built between a transaction request party and a transaction initiator, the transaction request party and the transaction initiator pass through each block chain node through a public key, transaction information and a private key, when the transaction party terminates the transaction, block chain nodes are self-locked, and block chain channels built between the transaction request party and the transaction initiator are interrupted.
2. A secure transaction method based on blockchain technology according to claim 1, wherein: in the first step, the transaction supervisor evaluates the working accuracy of the transaction product and the risk degree of the transaction agreement based on the display content, and the specific evaluation method comprises the following steps:
1) matching and comparing the digital information of the transaction product with the standard digital information corresponding to the product, evaluating the chromaticity, the size and the pattern similarity of the transaction product, and calculating the working precision of the transaction product based on the evaluation result, wherein a specific calculation formula A is as follows:
A＝α*m+β*n+δ*k；
wherein α, β, δ are proportionality coefficients, α + β + δ is 1, m represents chromaticity similarity between the transaction product and the genuine product, n represents size similarity between the transaction product and the genuine product, and k represents pattern similarity between the transaction product and the genuine product;
2) acquiring description information and selling price information of a transaction product in a transaction protocol;
3) evaluating the risk degree of the transaction agreement based on the calculation result in 1) and the information obtained in 2), wherein the method specifically comprises the following steps:
comparing the description information of the transaction product in the transaction agreement with the results of the similarity of the chromaticity, the size and the pattern of the transaction product in the transaction agreement 1), and evaluating the reasonability of the description information of the transaction product in the transaction agreement;
and secondly, predicting the selling price information of the transaction product based on the evaluation result and the working precision of the transaction product, comparing the prediction result with the selling price information of the transaction product in the transaction agreement, and evaluating the risk degree of the transaction agreement.
3. A secure transaction method based on blockchain technology according to claim 2, wherein: the transaction supervisor predicts the risk range which can be borne by the transaction requester according to the transaction request information sent by the transaction requester, the purchasing power of the transaction requester and the purchasing purpose, and the specific method comprises the following steps:
(1) primarily screening the transaction products according to transaction request information sent by a transaction requesting party, secondarily screening the transaction products according to the transaction agreement risk degree, and acquiring information of the transaction products after the two-time screening;
(2) predicting the accumulated risk of the transaction product according to the expected using time of the transaction requester for purchasing the transaction product, wherein a specific prediction formula S is as follows:
wherein d represents the risk degree of the transaction product corresponding to the transaction agreement, t is 1,2, …, n represents the expected service life of the transaction product purchased by the transaction requester, A represents the working accuracy of the transaction product,
indicating the corresponding work-making precision of the transaction request party after the expected service life of the transaction product,
indicating that the transaction product is being worked less accurately
Only then does the trading product present cumulative risk;
the transaction product information is sorted according to the accumulated risk degree, the risk range which can be borne by the transaction request party is predicted based on the purchasing power of the transaction request party, and the higher the purchasing power of the transaction request party is, the lower the corresponding risk bearing range is;
(3) and matching the optimal transaction initiator for the transaction requester in the cumulative risk degree ranking according to the predicted risk range that the transaction requester can bear.
4. A secure transaction method based on blockchain technology according to claim 3, wherein: in the fourth step, the transaction requester and the transaction initiator pass through each block chain node through the public key, the transaction information and the private key, and the specific method is as follows:
step 1: after the transaction requester and the transaction initiator are successfully matched, the transaction supervisor transmits the public key, the reasonability evaluation result of the transaction protocol of the transaction initiator and the accumulated risk prediction result of the transaction product to the transaction requester in sequence, and transmits the public key, the risk range which can be borne by the transaction requester and the purchasing power of the transaction product to the transaction initiator in sequence;
step 2: the transaction request party and the transaction initiator sequentially pass through the first block chain node, the second block chain node and the third block chain node according to the information transmitted in Step 1;
step 3: when the transaction request party and the transaction initiator pass through each block chain node, if the transaction request party or the transaction initiator is not satisfied with the information transmitted by the transaction supervisor party, the transaction request party or the transaction initiator inputs an error key, after the error key is input, self-locking of the corresponding block chain link point is realized, and the transaction of the transaction request party and the transaction initiator is terminated;
step 4: if the transaction request party or the transaction initiator smoothly passes through each block chain node, the transaction supervisor party sends the private key to the transaction request party and the transaction initiator, the private key dynamically changes according to the contact time of the transaction request party and the transaction initiator, when the transaction request party and the transaction initiator confirm the transaction, after the dynamic private key is input at the last block chain node, after the dynamic private key is input by the transaction request party and the transaction initiator, the transaction request party and the transaction initiator carry out effective transaction, and after the transaction is completed, each block chain node is automatically locked.
5. A secure transaction method based on blockchain technology according to claim 4, wherein: in the fourth step, if the transaction request party or the transaction initiator inputs an error key due to the self-reason, the transaction request party or the transaction initiator initiates a help request to the transaction supervisor within a specified time, and the transaction supervisor opens the block chain link point in the self-locking state.
6. A safe transaction system based on block chain technology is characterized in that: the system comprises a transaction initiator risk degree evaluation module, a transaction requester risk tolerance prediction module, a transaction matching module and a transaction execution module;
the transaction initiator risk degree evaluation module is used for evaluating the working accuracy of transaction products and the risk degree of a transaction protocol and transmitting an evaluation result to the transaction requester risk tolerance prediction module;
the transaction requester risk tolerance prediction module is used for predicting a risk range which can be borne by the transaction requester according to transaction request information sent by the transaction requester, purchasing power of the transaction requester and purchasing use, and transmitting a prediction result to the transaction matching module;
the transaction matching module is used for receiving the evaluation result transmitted by the transaction initiator risk degree evaluation module and the prediction result transmitted by the transaction requester risk tolerance prediction module, matching the corresponding transaction initiator for the transaction requester according to the received content, and transmitting the matching result and the evaluation result to the transaction execution module;
the transaction execution module is used for receiving the matching result and the evaluation result transmitted by the transaction matching module, and the transaction requester and the transaction initiator decide whether to carry out effective transaction based on the received content.
7. A secure transaction system based on blockchain technology according to claim 6, wherein: the transaction initiator risk degree evaluation module comprises a transaction product working precision prediction unit, a transaction product information acquisition unit and a transaction protocol risk degree evaluation unit;
the transaction product working precision prediction unit matches and compares the transaction product digital information with the standard digital information corresponding to the transaction product, evaluates the chromaticity, the size and the pattern similarity of the transaction product, predicts the working precision of the transaction product based on the evaluation result, and transmits the prediction result and the evaluation result to the transaction protocol risk degree evaluation unit;
the transaction product information acquisition unit acquires description information and selling price information of a transaction product in a transaction agreement and transmits the acquired information to the transaction agreement risk degree evaluation unit;
the transaction agreement risk degree evaluation unit receives the prediction result and the evaluation result transmitted by the transaction product working precision prediction unit and the acquisition information transmitted by the transaction product information acquisition unit, compares the description information of the transaction product in the transaction agreement with the chromaticity, size and pattern similarity result of the transaction product, evaluates the reasonability of the description information of the transaction product in the transaction agreement, predicts the selling price information of the transaction product based on the reasonability evaluation result of the description information of the transaction product and the working precision of the transaction product, compares the prediction result with the selling price information of the transaction product in the transaction agreement, evaluates the risk degree of the transaction agreement, and transmits the evaluated risk degree of the transaction agreement to the transaction requester risk tolerance prediction module.
8. A secure transaction system based on blockchain technology according to claim 7, wherein: the transaction requester risk tolerance prediction module comprises a transaction product screening unit, a transaction product accumulation risk prediction unit and a transaction requester risk tolerance prediction unit;
the transaction product screening unit receives the evaluation result transmitted by the transaction agreement risk degree evaluation unit, preliminarily screens the transaction product according to transaction request information sent by a transaction requester, secondarily screens the transaction product according to the transaction agreement risk degree, acquires the information of the transaction product after twice screening, and transmits the acquired information to the transaction product accumulated risk prediction unit;
the transaction product accumulated risk prediction unit receives the acquired information transmitted by the transaction product screening unit and performs prediction according to the transactionBuilding a predictive model of expected usage time of an easy-to-request party to purchase a transaction product
Predicting the accumulated risk of the screened transaction products, wherein d represents the risk degree of the transaction products corresponding to the transaction agreement, t is 1,2, …, n represents the expected service life of the transaction requester for purchasing the transaction products, A represents the working accuracy of the transaction products,
indicating the corresponding work-making precision of the transaction request party after the expected service life of the transaction product,
indicating that the transaction product is being worked less accurately
Then, the transaction product has accumulated risk, and the prediction result is transmitted to a risk tolerance prediction unit of the transaction requester;
the transaction requester risk tolerance prediction unit receives the transaction product accumulated risk prediction result transmitted by the transaction product accumulated risk prediction unit, predicts a risk range which can be borne by the transaction requester based on the purchasing power of the transaction requester, and transmits the transaction product accumulated risk prediction result and the risk range prediction result which can be borne by the transaction requester to the transaction matching module.
9. A secure transaction system based on blockchain technology according to claim 8, wherein: the transaction matching module receives a transaction product accumulated risk prediction result transmitted by the transaction requester risk tolerance prediction unit and a risk range prediction result born by the transaction requester, sorts the transaction product information according to the accumulated risk tolerance, matches an optimal transaction initiator for the transaction requester in the accumulated risk tolerance sorting according to the predicted risk range born by the transaction requester, and transmits the matching result to the transaction execution module.
10. A secure transaction system based on blockchain technology according to claim 9, wherein: the transaction execution module comprises a key acquisition unit, a block chain link point passing unit and a transaction execution unit;
the key acquisition unit receives the matching result transmitted by the transaction matching module, the transaction supervisor transmits the public key, the reasonability evaluation result of the transaction protocol of the transaction initiator and the accumulated risk prediction result of the transaction product to the transaction requester in sequence based on the matching result, the transaction supervisor transmits the public key, the risk range which can be born by the transaction requester and the purchasing power of the transaction product to the transaction initiator in sequence based on the matching result, and transmits the information received by the transaction requester and the transaction initiator to the block link point passing unit;
the block chain node receives the transaction request party and transaction initiator receiving information transmitted by the key acquisition unit through the unit, and sequentially passes through the first block chain node, the second block chain node and the third block chain node according to the receiving information sequence, if the transaction request party or the transaction initiator is not satisfied with the information transmitted by the transaction supervisor, the transaction request party or the transaction initiator inputs an error key, after the error key is input, the corresponding block chain link points realize self-locking, the transaction request party and the transaction initiator terminate the transaction, and the block chain link point self-locking information is transmitted to the transaction execution unit;
the transaction execution unit receives the block link point self-locking information transmitted by the block link point passing unit, when the block link point is not locked, the transaction supervisor sends a private key to the transaction requester and the transaction initiator, the private key dynamically changes according to the contact time of the transaction requester and the transaction initiator, when the transaction requester and the transaction initiator confirm the transaction, after the dynamic private key is input at the fourth block link point, after the dynamic private key is input by the transaction requester and the transaction initiator, the transaction requester and the transaction initiator carry out effective transaction, and after the transaction is completed, each block link point is automatically locked.
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