CN111125245A - Data processing method and device based on block chain and storage medium - Google Patents
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Abstract
The invention belongs to the technical field of block chains, and discloses a data processing method, a data processing device and a storage medium based on a block chain, wherein the method comprises the following steps: receiving a service protocol table transmitted to a Saas layer by a service mechanism service system; obtaining default amount intelligent contracts and hash values corresponding to the service agreement table, submitting the default amount intelligent contracts and the hash values to block chain nodes corresponding to a service mechanism business system, so that the block chain nodes combine the default amount intelligent contracts and the hash values with timestamps and synchronize all the block chain nodes in the block chain through a first key; and when a litigation request with a service institution is received, reading the intelligent contract of the default amount according to the litigation request, and forming a litigation data chain according to the time dimension. The invention connects each business mechanism and the auditing mechanism through the block chain, realizes the common identification and synchronization among all nodes in the network, avoids the possibility of tampering the business data after the events, and is convenient for the auditing mechanism to directly take evidence from the block chain for verification.
Description
Technical Field
The present invention relates to the field of block chain technology, and in particular, to a data processing method, apparatus and storage medium based on a block chain.
Background
For some service organizations and between auditing organizations, auditing organizations have the right to judge whether the service organizations and the service objects thereof violate the relevant conventions and take corresponding penalties. The service object refers to other organizations or clients and the like which have business with the service organization, such as between a financial institution and a court, between a school and an education bureau and the like, which all form a supervised and supervised relationship. Disputes between financial institutions and their clients are audited by the court, and disputes between schools and students are handled by the education bureau (which is, of course, only illustrated here, and may not necessarily be the education bureau, but also the court).
Some disputes often occur among service institutions under supervision and between the service institutions and clients, for example, with the popularization of credit cards, the consumption concept of first swiping a card and then repayment is more and more accepted by modern people, the financial dispute treatment is often involved between financial institutions and the court, more and more cases of credit cards are involved, the trial period of the cases is long, and great challenges are brought to banks and the court.
At present, after disputes occur, the service organization usually needs to present some evidence to the auditing organization to prove the default responsibility of one party, for example, the reason for the initiation of dispute of credit card is mostly concentrated on that the cardholder (customer) still does not return overdraft after being hastened for many times, then the bank exports relevant evidence materials from the service system, and needs to prove the authenticity and integrity of the evidence to the court, and the officer of the court needs to check the evidence provided by the bank, and also needs to spend time to calculate the amount of interest and default money which should be borne, so as to prevent the bank from claiming the amount of money to be wrong. However, the existing auditing mechanism cannot help the auditing mechanism to verify the evidence and the evidence chain well, and most of the existing auditing mechanism depends on manual work in the auditing mechanism to judge and audit by experience; and the related calculation logic of the default amount caused by the default is usually complex, and the calculation is only carried out by the manpower of an auditing mechanism, so that the problems of insufficient trust and insufficient public trust exist.
Disclosure of Invention
In order to solve the technical problems, the invention provides a data processing method based on a block chain, which is applied to an electronic device, wherein the block chain comprises a service layer, a Saas layer and a Baas layer, the service layer comprises an auditing mechanism service system and at least one service mechanism service system, the Saas layer is connected with the service layer through an intelligent service program, and each intelligent service program is connected with a block chain link point of the Baas layer through an interface;
the method comprises the following steps:
receiving a service agreement table transmitted to a Saas layer by a service organization business system, wherein the service agreement table is a text of an agreed service provision and a default provision;
obtaining default amount intelligent contracts and hash values corresponding to the service agreement table, submitting the default amount intelligent contracts and the hash values to block chain nodes corresponding to the service mechanism business system so that the block chain nodes can combine the default amount intelligent contracts and the hash values with timestamps and synchronize all the block chain nodes in the block chain through a first secret key;
and when a litigation request with the service institution is received, reading the intelligent contract of the default amount according to the litigation request, and forming a litigation data chain according to the time dimension.
The invention also provides a data processing device based on the block chain, wherein the block chain comprises a service layer, a Saas layer and a Baas layer, the service layer comprises a service system of an auditing mechanism and a service system of a service mechanism, the Saas layer is respectively connected with the service system of the corresponding service mechanism and the service system of the auditing mechanism through each intelligent service program, each intelligent service program is also respectively connected with the block chain link point of the Baas layer through an interface, and the block chain nodes are mutually connected through a network;
the data processing apparatus includes:
the service provision transmission module is used for receiving a service agreement table transmitted to the Saas layer by a service organization business system, wherein the service agreement table is a text of agreed service provision and default provision;
the data uplink module is used for obtaining an intelligent contract and a hash value of the default amount corresponding to the service protocol table, submitting the intelligent contract and the hash value of the default amount to a block chain node corresponding to the service mechanism business system, so that the block chain node combines the intelligent contract and the hash value of the default amount with a timestamp and synchronizes to all block chain nodes in a block chain through a first key;
and the evidence chain forming module is used for reading the intelligent contract of the default amount according to the litigation request and forming a litigation data chain according to the time dimension when the litigation request of the service institution is received.
The present invention also provides an electronic device, comprising: a memory in which a blockchain based data processing program is stored and a processor, which when executed by the processor implements the blockchain based data processing method as described above.
The present invention also provides a computer-readable storage medium storing a computer program comprising program instructions which, when executed by a processor, implement the blockchain-based data processing method as described above.
The invention utilizes the block chain to communicate the service system of the service organization and the auditing organization, and the auditing organization participates in dispute treatment by the modes of block consensus, electronic signature, credible timestamp and the like, thereby enhancing the legal effectiveness of the block chain evidence. The default amount calculation automatically executed by the intelligent contract of the default amount has high accuracy and reliability; and the data is encrypted before uplink, and the data of the data node is checked and verified in an authorized encryption and decryption and zero-knowledge proof mode, so that the data is kept in a confidential state on the chain and under the chain, and the privacy protection of the block chain system can be improved.
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The above features and technical advantages of the present invention will become more apparent and readily appreciated from the following description of the embodiments thereof taken in conjunction with the accompanying drawings.
FIG. 1 is a block chain-based data processing method according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating a connection between a service system and a block chain node according to an embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating the connection of a data node to an encryption node according to an embodiment of the present invention;
FIG. 4 is a diagram illustrating a hardware architecture of an electronic device according to an embodiment of the invention;
fig. 5 is a flowchart illustrating a data processing procedure based on a block chain according to an embodiment of the present invention.
Detailed Description
Embodiments of a data processing method, an apparatus, and a storage medium based on a block chain according to the present invention will be described below with reference to the accompanying drawings. Those of ordinary skill in the art will recognize that the described embodiments can be modified in various different ways, or combinations thereof, without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are illustrative in nature and not intended to limit the scope of the claims. Furthermore, in the present description, the drawings are not to scale and like reference numerals refer to like parts.
The present embodiment describes a data processing method based on a block chain by constituting the block chain between a court and a financial institution. However, the present embodiment is not limited to the mechanisms that form the blockchain, and the method of the present invention can be used between the mechanisms that form the case audits. Case management refers to the management of cases violating terms agreed upon with each other among institutions, and among the institutions, there is an institution capable of judging whether or not the institutions and related personnel violate the agreed upon terms and handling corresponding penalties. Such as universities, middle schools, primary schools, kindergartens and educational offices. The company and the subordinated subsidiaries and departments of the company. The following description will be made only by way of example of the block chain between the court and financial institution.
Fig. 1 is a schematic flowchart of a data processing method based on a blockchain according to an embodiment of the present invention, which is applied to an electronic device, where as shown in fig. 2, the blockchain includes a business layer, a Saas (software as a service) layer, and a bas (back end as a service) layer, and the business layer includes a court business system, a banking system, and other financial business systems. The Saas application layer is connected with the corresponding business systems of the financial institutions and the courts through the intelligent service programs, the intelligent service programs are further connected with the block chain link points of the Baas layer through API interfaces, the data interfaces of the intelligent service programs are connected with one block chain link point, and the block chain nodes are connected with one another through a network. The Baas layer comprises block chain link points and data interfaces, and taking a block chain formed between a court and financial institutions as an example, business systems of the court and the financial institutions are respectively connected with the block chain link points through intelligent service programs, and the block chain nodes are connected with each other, so that the business systems of the court and the financial institutions are mutually communicated. The intelligent service program comprises various data transmission interfaces between the service system and the block link points.
The data processing method based on the block chain comprises the following steps:
step S1, receiving a service agreement table transmitted to the Saas layer by the service organization business system, where the service agreement table is a text of agreed service terms and default terms.
The service agreement table is signed between the client and the financial institution, and the service agreement table may be different according to different service items, for example, signing an electronic credit card service agreement table to apply for an electronic credit card, signing a house loan service agreement table to apply for a house loan. Taking the example of signing the electronic credit card service agreement form, the customer provides the customer's information and his electronic signature, along with agreed service terms and default terms (such as the method and standard for collecting the default money) when signing the electronic credit card service agreement form. And after the signing of the service agreement table is finished, the service agreement table is transmitted into an intelligent service program corresponding to the Saas application layer by the business system of the financial institution.
Step S2, obtaining the default amount intelligent contract and the hash value corresponding to the service agreement table, for example, calculating the hash value by using SM3 hash algorithm. And submitting the default amount intelligent contract and the hash value to a block chain node corresponding to the service mechanism business system, so that the block chain node combines the default amount intelligent contract and the hash value with a timestamp and synchronizes to all block chain nodes in the block chain through a first key.
Specifically, in order to enable all parties to share data and maintain a distributed ledger of block chains together, each party is assigned a digital certificate and generates a first key. All uplink data are encrypted by the first secret key of the data owner and then uplink is carried out, the encrypted data cannot be decrypted and checked under the unauthorized condition, so that the possibility that financial institutions with competitive relations coexist in the block chain exists, lawsuit data can be checked only by the block chain node corresponding to the authorized court, and other financial institutions cannot check the data.
And step S3, when a litigation request with the service institution is received, reading the intelligent contract of the default amount according to the litigation request, and forming a litigation data chain according to the time dimension.
Specifically, as each service item between the client and the financial institution progresses, the business system of the financial institution stores each related data record into the corresponding block link point according to a certain period, and further synchronizes to the block link nodes of other financial institutions and the court for synchronous storage. Such as credit card opening enablement, normal consumption, bill repayment, etc. When the client is overdue, the overdue bill and the record of collection are timely stored in the block chain node.
When a financial institution commissions a lition, the financial institution authorizes the court to view data associated with evidence material in the chain, and other financial institutions are not authorized to view the bank's private data. Specifically, authorization refers to the usage of authorized encryption and decryption to realize the view of encrypted data. The content of the private data which can be viewed by the court is controlled by authorizing the viewing authority of partial fields in the encrypted content to other blockchain nodes. And after the block link points corresponding to the court are authorized, reading all records on the relevant chain of the client through the data interface. After the intelligent service program of the Saas layer of the court reads all the relevant data, the evidence chain is integrated, and the evidence chain is formed according to the time dimension.
And calling the intelligent default amount contract to calculate a standard default amount, judging whether the standard default amount is the same as the default amount, and making final judgment by a judge according to the complete evidence chain and the default reference.
Further, as shown in fig. 3, the blockchain network may employ a fully-encrypted framework to protect the private data of each participant, where the fully-encrypted framework means that each blockchain node is composed of two layers, namely a data node and an encryption node, and the data node shares data with other data nodes to form a blockchain. The encryption node is located at the next layer of the data node and used for providing encryption and decryption services for data uploaded to the data node, the encryption node is different from a block chain for encrypting and decrypting each formed block, the encryption node encrypts the content of the data and updates the content of the data into an account book in the data node, and meanwhile stores a second secret key of the participant, and the encryption node can be deployed in a local machine room, so that the second secret key (which is different from a first secret key generated by block transmission) is ensured to be in the own control of the participant, and other participants in the block chain cannot acquire the second secret key, so that the data synchronized on the chain are all in a ciphertext state, the data control right is firmly controlled in the hands of a data uploader, and other participants cannot read the ciphertext data.
Further, during the block link point encryption writing data:
the encryption node is used for receiving the data, encrypting the data by adopting a second key and sending the encrypted data to the data node;
the data nodes are used for sending data transmission intelligent contract calling requests to all data nodes in the block chain, generating digital signatures of calling results, forming a block by the encrypted data, the calling results and the digital signatures, encrypting the block through a first key and sending the encrypted block to all data nodes in the block chain, encrypting through a second key to generate event messages of the block, and sending the event messages to the encryption nodes;
the other data nodes are used for executing signature verification and multi-version concurrent control check on the received blocks;
the encryption node is also used for decrypting the event message through a second key and returning a data processing result to a service organization business system corresponding to the encryption node.
Further, in decrypting the query data at the block link point:
the encryption node is used for receiving the data query request, calling a second key to encrypt the data query request and sending the encrypted data query request to the data node;
the data node is used for calling and executing the data transmission intelligent contract and sending the calling result and the signature of the data transmission intelligent contract to the encryption node;
the encryption node is also used for decrypting the calling result through a second key and returning the decrypted calling result to the service mechanism business system corresponding to the encryption node.
In an alternative embodiment, the data node may employ authorized encryption and decryption to enable viewing and verification of encrypted data. For example, if a data node requests to invoke an intelligent contract to compute a breach fund, it needs to know the content of the encrypted data to compute the breach fund. The court needs to view the financial institution's certification material and also encrypted data. In order to prevent all data contents from being viewed, the authorization granularity of the encrypted data can reach a field level, namely for the contents encrypted by the encryption node, the mechanism outside the block chain can be authorized by the viewing authority of part of fields in the encrypted contents, and the mechanism can conveniently and flexibly authorize. For example, when the customer is overdue and the inside of the bank has no effect on collection urging, fields such as the contact information of the customer can be authorized to a collection urging company (the collection urging company also forms a data node of a block chain), the collection urging company obtains authorization and reads the customer information to carry out collection urging business, and the collection urging company does not need to have any right to check other unauthorized fields such as account opening information, consumption information, payment information and the like of the customer. Meanwhile, the collection urging company can also chain and store the collection urging result (encrypted by the encryption node and transmitted to the data node) and authorize the collection urging company to the bank as a reference basis for the initiation of a complaint.
In an optional embodiment, a zero-knowledge proof technology may also be adopted, since the acquirer is not obligated to disclose its own acquisition record (the private business data belonging to the acquirer) to other organizations in the blockchain, when the court receives the encrypted acquisition record provided by the bank, if the acquisition record is suspicious, the authenticity of the acquisition record may be ensured by cross-verifying the acquisition record of the acquirer and the acquisition record after the bank authorizes decryption through the zero-knowledge proof technology. The zero knowledge proof can also be used for litigation among various banks, one consumer may overdue among a plurality of banks, but the banks belong to a competitive relationship, the encrypted data of the appellating overdue consumer can only be authorized to the court, and cannot be authorized to be shared with other banks, if one bank verifies that the overdue consumer is already appellated by one bank by using the zero knowledge proof technology of the block chain, the comprehensive consideration can be realized, the investment of urging can be reduced, and the process of litigation can be directly entered.
In an alternative embodiment, the corresponding block nodes of the court business system may also store the relevant information generated during the trial phase of the case in time, for example, a customer was litigation raised by a bank due to overdue credit card before 2015, and the court has determined that the customer paid to the bank according to the overdue default fund of the bank. The related information of the identity information of the client, the bank for opening the credit card, the overdue time of the credit card, the court judgment result, whether to pay default money and the like are stored on the block chain node corresponding to the court business system. After the court receives the litigation request, the past judgment data of the client is called from the block chain node of the court according to the identity information of the client in the litigation request, and the responsibility of the client is comprehensively judged by combining the past judgment data and the default fund of the litigation.
Further, after the court extracts the past litigation data of the client, the judgment matrix S of the client is obtained according to the past litigation situation of the client and the following formula.
S＝m1bK1+m2bK2+…mibKi…+mnbKn
Wherein, bKiIs a basis vector formed by related data related to the ith litigation in the kth litigation related to the client, bK1、bK2、...bKi、bKnForming a basis matrix. The kinds of litigation include overdue litigation with a credit card, litigation with damage to public property, and the like.
m1、m2…mnThe weight coefficient is set in advance so as to gradually decrease from the time of the current litigation request, and may be constant.
The basis vector is composed of data related to the client and the past litigation on the block link node corresponding to the litigation of the financial institution checked by the court, for example, the basis vector corresponding to the overdue litigation of the credit card, and the data may include card swiping data of the credit card each time, the application date of the credit card, the limit of the credit card, the overdue time period of the credit card, the reimbursed amount and the like.
Various litigation and judgment results existing in a court business system are utilized to form a reference matrix, a Pearson correlation coefficient is obtained by the reference matrix and the judgment matrix S, and the judgment result of the reference matrix with the maximum correlation coefficient and higher than a set threshold value is selected as a judgment result. Of course, the judgment result mentioned here only refers to some judgment bases of the judge, and does not mean that the judge is necessarily the final result.
In an alternative embodiment, a combined weight matrix with different weights can be constructed for each litigation in the same category as the litigation,
Fn＝wn,1θ1+wn,2θ2+…+wn,lθl
wherein the matrix W is the weight assigned to each litigation in a litigation class, theta is the linear coefficient vector assigned to each weight, Wn,lThe weight given to the nth litigation for the first time is more than 1 and not more than n-1, n is the frequency of litigation, l is the frequency of weighting, WlWeight vectors composed of the first weighted weights, and the sum of the weights in each weight vector is not more than n-1, thetalLinear coefficient for the first weighting, thetak≥0,k＝1,2,…,l，
FnThe combination weight of the nth litigation;
a vector difference matrix C is constructed using the basis matrix,
obtaining a weight evaluation model according to the vector difference matrix and the combined weight matrix
M(F)＝CF＝CWΘ；
The optimal solution of the combined weight matrix corresponding to the first derivative of the weight evaluation model being zero is respectively used as the optimal weight of each litigation to be endowed with a weight coefficient m1、m2...mn。
In an optional embodiment, the block link points corresponding to the business system of the financial institution may also predict the default behavior sequence of the customer, and based on this, develop necessary business procedures as soon as possible, such as promotion, litigation, etc., and the method for predicting the default behavior of the customer includes:
step S11, substituting specific default behaviors with different letters and/or symbols, and forming default behavior sequences from the default behavior data of the customers, wherein the default behavior sequences are time sequences of various default behaviors according to the occurrence time sequence of the default behaviors, and the default behaviors can be, for example, payment of house rent default, loan repayment default, payment of goods money default and the like, wherein the default behavior sequences are formed by dividing default behavior vectors according to default amount sections and default ultralimit sections;
step S12, dividing the behavior sequence into a plurality of subsequences by using at least one sequence length, wherein the sequence length of the subsequences is shorter than the sequence length of the default behavior sequence;
step S13, constructing multiple trees of the default behavior sequence, taking each default behavior occurring in the default behavior sequence as a root node, taking various default behavior combinations in the subsequence as branches, and connecting from the root node to the leaf node via the child nodes (nodes connected between the root node and the leaf node), thereby forming multiple trees based on the root nodes. The number of times of occurrence of the default behavior represented by the root node in the default behavior sequence is the node value of the root node, the sum of the number of times of occurrence of the default behavior represented by the root node to the child node in each child sequence is the node value of the child node, and the result shows that the customer generates a corresponding default behavior combination in the sequence from the root node to the child node, for example, if the root node is within 1 ten thousand yuan of the default for paying house rents, the node value is 1, a branch below the root node is within 10 ten thousand of the default for paying loans until a leaf node is within 1 ten thousand of the default for paying goods, the node value is 2, the default for paying house rents is within 1 ten thousand yuan, the default for paying goods is within 10 ten thousand of the default for goods, and the node value of the sequential combination for paying goods default within 1 ten thousand of the default for goods is 5;
in step S14, the predicted probability that the next-order default behavior in each subsequence is any default behavior in the default behavior sequence is obtained by the following formula (1), which means that the predicted probability that the next-order default behavior in a certain order of default behaviors of the customer is any default behavior in the past default behaviors is obtained.
Wherein p (x | y)1y2…yi) And p (i +1, x) represents the prediction probability that the default behavior of the subsequence order i +1 with the sequence length i is x, p (i, x) represents the prediction probability that the default behavior of the subsequence order i is x, p (1, x) represents the prediction probability that the default behavior of the subsequence order 1 is x, y (i +1, x) represents the prediction probability that the default behavior of the subsequence order i is x, and1root node of a tree representing said sequence of violations, y2,…,yiRepresenting the root node y of the tree1A sub-node of layer 2 to i of a branch, y1y2…yiRepresenting the subsequence with the sequence length i corresponding to the branch, i is more than or equal to 1 and less than or equal to N-1, N represents the highest layer number of the branch, x represents the default behavior to be predicted, and N (y)1X) a node value with root node x in the first level of the tree representing the sequence of behaviors, ∑ N (y)1) Sum of node values of root nodes of trees of a first level of trees representing the sequence of violations, N (y)i+1X) represents the i-th level node y of the branchiThe child node of the (i + 1) th layer of (2) is a node value of x, N (y)i) Node y of the i-th layer representing the branchiThe node value of (a) is set,
represents the ith layer node y of the branch of the subsequenceiThe sum of the node values of all the child nodes of the (i + 1) th layer;
in step S15, the default behaviors of each subsequence and the next sequence are ordered according to the descending order of the prediction probability, for example, assuming that one default behavior sequence is ebacbbcabc cdegfa, one subsequence of which is CBCAB, and the default behavior of the next sequence of the subsequence may be A, B, C, D, E, F or G in the default behavior sequence, and the sequence of the subsequence and the default behavior of the next sequence is ordered according to the prediction probability, for example, CBCABD, CBCABC, CBCABA, CBCABB, CBCABF, CBCABE, and cbg are ordered according to the descending order of the prediction probability;
in step S16, the sequence including the maximum predicted probability of the last default behavior of the default behavior sequence is screened out, so as to obtain the default behavior of the next order of each subsequence, and the default behavior of the next order of the customer is updated. If the last default behavior of the default behavior sequence is C, CBCABD is the sequence corresponding to the maximum prediction probability including C.
The invention also provides a data processing device based on the block chain, wherein the block chain comprises a service layer, a Saas layer and a Baas layer, the service layer comprises a service system of an auditing mechanism and a service system of a service mechanism, the Saas layer is respectively connected with the service system of the corresponding service mechanism and the service system of the auditing mechanism through each intelligent service program, each intelligent service program is also respectively connected with the block chain link point of the Baas layer through an interface, and the block chain nodes are mutually connected through a network;
the data processing apparatus includes:
a service clause transmission module 501, configured to receive a service agreement table transmitted to the Saas layer by a service organization service system, where the service agreement table is a text of agreed service clauses and default clauses;
a data uplink module 502, configured to obtain an intelligent contract and a hash value of the default amount corresponding to the service agreement table, and submit the intelligent contract and the hash value of the default amount to a blockchain node corresponding to the service mechanism service system, so that the blockchain node combines the intelligent contract and the hash value of the default amount with a timestamp, and synchronizes to all blockchain nodes in a blockchain through a first key;
the evidence chain forming module 504 is configured to, when a litigation request with the service organization is received, read the intelligent contract for the default amount according to the litigation request, and form a litigation data chain according to the time dimension.
The invention further provides an electronic device, which is shown in fig. 4 and is a schematic diagram of a hardware architecture of an embodiment of the electronic device according to the invention. In the present embodiment, the electronic device 2 is a device capable of automatically performing numerical calculation and/or information processing according to a preset or stored instruction. For example, the server may be a smart phone, a tablet computer, a notebook computer, a desktop computer, a rack server, a blade server, a tower server, or a rack server (including an independent server or a server cluster composed of a plurality of servers). As shown in fig. 4, the electronic device 2 includes at least, but not limited to, a memory 21 and a processor 22, which are communicatively connected to each other through a system bus. Wherein: the memory 21 includes at least one type of computer-readable storage medium including a flash memory, a hard disk, a multimedia card, a card type memory (e.g., SD or DX memory, etc.), a Random Access Memory (RAM), a Static Random Access Memory (SRAM), a Read Only Memory (ROM), an Electrically Erasable Programmable Read Only Memory (EEPROM), a Programmable Read Only Memory (PROM), a magnetic memory, a magnetic disk, an optical disk, etc. In some embodiments, the storage 21 may be an internal storage unit of the electronic device 2, such as a hard disk or a memory of the electronic device 2. In other embodiments, the memory 21 may also be an external storage device of the electronic apparatus 2, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), or the like, provided on the electronic apparatus 2. Of course, the memory 21 may also comprise both an internal memory unit of the electronic apparatus 2 and an external memory device thereof. In this embodiment, the memory 21 is generally used for storing an operating system installed in the electronic device 2 and various types of application software, such as the data processing program code based on the block chain. Further, the memory 21 may also be used to temporarily store various types of data that have been output or are to be output.
The processor 22 may be a Central Processing Unit (CPU), controller, microcontroller, microprocessor, or other data Processing chip in some embodiments. The processor 22 is generally configured to control the overall operation of the electronic apparatus 2, such as performing data interaction or communication related control and processing with the electronic apparatus 2. In this embodiment, the processor 22 is configured to run a program code stored in the memory 21 or process data, for example, run the data processing program based on the block chain.
Optionally, the electronic device 2 may further comprise a display, which may also be referred to as a display screen or a display unit. In some embodiments, the display device can be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, an Organic Light-Emitting Diode (OLED) display, and the like. The display is used for displaying information processed in the electronic apparatus 2 and for displaying a visualized user interface.
It is noted that fig. 4 only shows the electronic device 2 with components 21, 22, but it is to be understood that not all shown components are required to be implemented, and that more or less components may be implemented instead.
The memory 21 containing the readable storage medium may include therein an operating system, a block chain based data processing program 50, and the like. The steps of S1 to S4 described above are realized when the processor 22 executes the block chain-based data processing program 50 in the memory 21, and will not be described herein again. In this embodiment, the blockchain-based data processing program 50 stored in the memory 21 may be divided into one or more program modules, and the one or more program modules are stored in the memory 21 and executed by one or more processors (in this embodiment, the processor 22) to complete the present invention. For example, fig. 5 shows a block chain-based data processing program module schematic diagram, in this embodiment, the block chain-based data processing program 50 may be divided into a service provision transmission module 501, a data uplink module 502, and an evidence chain forming module 504. The program modules referred to herein are a series of computer program instruction segments that can perform specific functions, and are more suitable than programs for describing the execution process of the blockchain-based data processing program in the electronic device 2. The following description will specifically describe specific functions of the program modules.
The service provision transmission module 501 is configured to receive a service agreement table transmitted to the Saas layer by the service organization service system, where the service agreement table is a text of agreed service provision and default provision;
the data uplink module 502 is configured to obtain an intelligent contract and a hash value of the default amount corresponding to the service agreement table, and submit the intelligent contract and the hash value of the default amount to a blockchain node corresponding to the service mechanism service system, so that the blockchain node combines the intelligent contract and the hash value of the default amount with a timestamp and synchronizes to all blockchain nodes in a blockchain through a first key;
the evidence chain forming module 504 is configured to, when a litigation request with the service organization is received, read the intelligent contract for the default amount according to the litigation request, and form a litigation data chain according to the time dimension.
In an optional embodiment, the system further comprises a query authorization module 505, which uses an authorized encryption and decryption manner to realize the viewing and verification of the encrypted data. For example, if a data node requests to invoke a breach amount intelligent contract to calculate a breach fund, it needs to know the content of the encrypted data to calculate the breach fund. The court needs to view the financial institution's certification material and also encrypted data. In order to prevent all data contents from being viewed, the authorization granularity of the query authorization module 505 for the encrypted data can reach a field level, that is, for the contents encrypted by the encryption node, the mechanism outside the block chain can be authorized by the viewing authority of part of fields in the encrypted contents, which is convenient for the flexible and autonomous authorization of each mechanism. For example, when the customer is overdue and the inside of the bank has no effect on collection urging, fields such as the contact information of the customer can be authorized to a collection urging company (the collection urging company also forms a data node of a block chain), the collection urging company obtains authorization and reads the customer information to carry out collection urging business, and the collection urging company does not need to have any right to check other unauthorized fields such as account opening information, consumption information, payment information and the like of the customer. Meanwhile, the collection urging company can also chain and store the collection urging result (encrypted by the encryption node and transmitted to the data node) and authorize the collection urging company to the bank as a reference basis for the initiation of a complaint.
In an optional embodiment, the system further comprises a verification module 506, which cross-verifies the collection record of the collection company with the collection record decrypted by the bank authorization through a zero-knowledge proof technology to ensure the authenticity of the collection record. The zero knowledge proof can also be used for litigation among various banks, one consumer may overdue among a plurality of banks, but the banks belong to a competitive relationship, the encrypted data of the appellating overdue consumer can only be authorized to the court, and cannot be authorized to be shared with other banks, if one bank verifies that the overdue consumer is already appellated by one bank by using the zero knowledge proof technology of the block chain, the comprehensive consideration can be realized, the investment of urging can be reduced, and the process of litigation can be directly entered.
In an optional embodiment, the system further comprises an auxiliary auditor module 507, and after the court extracts past litigation data of the client, the court obtains a decision matrix S of the client according to the following formula according to the past litigation situation of the client.
S＝m1bK1+m2bK2+…mibKi…+mnbKn
Wherein, bKiIs a basis vector formed by related data related to the ith litigation in the kth litigation related to the client, bK1、bK2、...bKi、bKnForming a basis matrix. The kinds of litigation include overdue litigation with a credit card, litigation with damage to public property, and the like.
m1、m2...mnThe weight coefficient is set in advance so as to gradually decrease from the time of the current litigation request, and may be constant.
The basis vector is composed of data related to the client and the past litigation on the block link node corresponding to the litigation of the financial institution checked by the court, for example, the basis vector corresponding to the overdue litigation of the credit card, and the data may include card swiping data of the credit card each time, the application date of the credit card, the limit of the credit card, the overdue time period of the credit card, the reimbursed amount and the like.
Various litigation and judgment results existing in a court business system are utilized to form a reference matrix, a Pearson correlation coefficient is obtained by the reference matrix and the judgment matrix S, and the judgment result of the reference matrix with the maximum correlation coefficient and higher than a set threshold value is selected as a judgment result. Of course, the judgment result mentioned here only refers to some judgment bases of the judge, and does not mean that the judge is necessarily the final result.
In an alternative embodiment, the method further comprises a weight determination module 508 for constructing a combined weight matrix with different weights for each litigation in the same category as the litigation,
Fn＝wn,1θ1+wn,2θ2+…+wn,lθl
wherein the matrix W is a weight matrix assigned to each litigation in a litigation class, theta is a linear coefficient vector assigned to each weight, Wn,lThe weight given to the nth litigation for the first time is more than 1 and not more than n-1, n is the frequency of litigation, l is the frequency of weighting, WlWeight vectors composed of the first weighted weights, and the sum of the weights in each weight vector is not more than n-1, thetalLinear coefficient for the first weighting, thetak≥0,k＝1,2,…,l，
FnThe combination weight of the nth litigation;
a vector difference matrix C is constructed using the basis matrix,
obtaining a weight evaluation model according to the vector difference matrix and the combined weight matrix
M(F)＝CF＝CWΘ；
The optimal solution of the combined weight matrix corresponding to the first derivative of the weight evaluation model being zero is respectively used as the optimal weight of each litigation to be endowed with a weight coefficient m1、m2...mn。
In addition, the invention also provides a case processing device based on the block chain, wherein the block chain comprises a service layer, a Saas layer and a Baas layer, the service layer comprises an auditing mechanism service system and at least one service mechanism service system, the Saas layer is connected with the service layer through an intelligent service program, and each intelligent service program is connected with the block chain link point of the Baas layer through an interface; the case processing device comprises a service provision transmission module 501, a data uplink module 502 and an evidence chain forming module 504.
The service provision transmission module 501 is configured to receive a service agreement table transmitted to the Saas layer by the service organization service system, where the service agreement table is a text of agreed service provision and default provision;
the data uplink module 502 is configured to obtain an intelligent contract and a hash value of the default amount corresponding to the service agreement table, and submit the intelligent contract and the hash value of the default amount to a blockchain node corresponding to the service mechanism service system, so that the blockchain node combines the intelligent contract and the hash value of the default amount with a timestamp and synchronizes to all blockchain nodes in a blockchain through a first key;
the evidence chain forming module 504 is configured to, when a litigation request with the service organization is received, read the breach amount intelligent contract according to the litigation request, and form a litigation data chain according to a time dimension.
Furthermore, the embodiment of the present invention also provides a computer-readable storage medium, which may be any one or any combination of a hard disk, a multimedia card, an SD card, a flash memory card, an SMC, a Read Only Memory (ROM), an Erasable Programmable Read Only Memory (EPROM), a portable compact disc read only memory (CD-ROM), a USB memory, and the like. Among other things, the computer-readable storage medium includes a blockchain-based data processing program 50, which when executed by the processor 22 performs the following:
step S1, receiving a service agreement table transmitted to the Saas layer by a service organization business system, wherein the service agreement table is a text of an agreed service provision and a default provision;
step S2, obtaining default amount intelligent contracts and hash values corresponding to the service agreement table, submitting the default amount intelligent contracts and hash values to block chain nodes corresponding to the service mechanism business system, so that the block chain nodes combine the default amount intelligent contracts and hash values with timestamps and synchronize all the block chain nodes in a block chain through a first key;
and step S3, when a litigation request with the service institution is received, reading the intelligent contract of the default amount according to the litigation request, and forming a litigation data chain according to the time dimension.
The embodiment of the computer-readable storage medium of the present invention is substantially the same as the above-mentioned data processing method based on the blockchain and the embodiment of the electronic device 2, and will not be described herein again.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. 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 data processing method based on a block chain is applied to an electronic device and is characterized in that the block chain comprises a service layer, a Saas layer and a Baas layer, wherein the service layer comprises an auditing mechanism service system and at least one service mechanism service system, the Saas layer is connected with the service layer through an intelligent service program, and each intelligent service program is connected with a block chain link point of the Baas layer through an interface;
the method comprises the following steps:
receiving a service agreement table transmitted to a Saas layer by a service organization business system, wherein the service agreement table is a text of an agreed service provision and a default provision;
obtaining default amount intelligent contracts and hash values corresponding to the service agreement table, submitting the default amount intelligent contracts and the hash values to block chain nodes corresponding to the service mechanism business system so that the block chain nodes can combine the default amount intelligent contracts and the hash values with timestamps and synchronize all the block chain nodes in the block chain through a first secret key;
and when a litigation request with the service institution is received, reading the intelligent contract of the default amount according to the litigation request, and forming a litigation data chain according to the time dimension.
2. The method of blockchain-based data processing according to claim 1, wherein the litigation request includes a default amount, further comprising, after reading the service agreement algorithm according to the litigation request:
and calling the intelligent contract of the default amount to calculate the standard default amount of money and judging whether the standard default amount of money is the same as the default amount of money or not.
3. The blockchain-based data processing method of claim 1, wherein deriving the hash value corresponding to the service agreement table comprises:
and calculating a hash value corresponding to the service agreement table by using an SM3 hash algorithm.
4. The blockchain-based data processing method of claim 1,
each block chain link point of the block chain consists of a data node and an encryption node, all the data nodes form the block chain through data sharing, and the encryption node is used for encrypting data through a second key and updating the encrypted data to the data nodes.
5. The method of claim 4, wherein during the block-chain-link-point encryption writing of data,
the encryption node is used for receiving the data, encrypting the data by adopting a second key and sending the encrypted data to the data node;
the data nodes are used for sending data transmission intelligent contract calling requests to all data nodes in the block chain, generating digital signatures of calling results, forming a block by the encrypted data, the calling results and the digital signatures, encrypting the block through a first key and sending the encrypted block to all data nodes in the block chain, encrypting through a second key to generate event messages of the block, and sending the event messages to the encryption nodes;
the other data nodes are used for executing signature verification and multi-version concurrent control check on the received blocks;
the encryption node is also used for decrypting the event message through a second key and returning a data processing result to a service organization business system corresponding to the encryption node.
6. The method of claim 4, wherein in decrypting the query data at the block link node,
the encryption node is used for receiving the data query request, calling a second key to encrypt the data query request and sending the encrypted data query request to the data node;
the data node is used for calling and executing the data transmission intelligent contract and sending the calling result and the signature of the data transmission intelligent contract to the encryption node;
the encryption node is also used for decrypting the calling result through a second key and returning the decrypted calling result to the service mechanism business system corresponding to the encryption node.
7. The blockchain-based data processing method according to claim 4,
and the data node is used for setting the viewing authority of part of field data in the encrypted data as the viewing authority of the auditing mechanism.
8. A data processing device based on a block chain is characterized in that the block chain comprises a service layer, a Saas layer and a Baas layer, wherein the service layer comprises a service system of an auditing mechanism and a service system of a service mechanism, the Saas layer is respectively connected with the service system of the corresponding service mechanism and the service system of the auditing mechanism through intelligent service programs, the intelligent service programs are respectively connected with block chain link points of the Baas layer through interfaces, and the block chain nodes are mutually connected through a network;
the data processing apparatus includes:
the service provision transmission module is used for receiving a service agreement table transmitted to the Saas layer by a service organization business system, wherein the service agreement table is a text of agreed service provision and default provision;
the data uplink module is used for obtaining an intelligent contract and a hash value of the default amount corresponding to the service protocol table, submitting the intelligent contract and the hash value of the default amount to a block chain node corresponding to the service mechanism business system, so that the block chain node combines the intelligent contract and the hash value of the default amount with a timestamp and synchronizes to all block chain nodes in a block chain through a first key;
and the evidence chain forming module is used for reading the intelligent contract of the default amount according to the litigation request and forming a litigation data chain according to the time dimension when the litigation request of the service institution is received.
9. An electronic device, comprising: a memory in which a blockchain based data processing program is stored and a processor, which when executed by the processor implements the blockchain based data processing method according to any one of claims 1 to 7.
10. A computer-readable storage medium, characterized in that it stores a computer program comprising program instructions which, when executed by a processor, implement the blockchain-based data processing method of any one of claims 1 to 7.
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