Block chain digital certificate management method and system supporting full life cycle and data security

Abstract

The invention is suitable for the technical field of digital certificate management, and particularly relates to a block chain digital certificate management method and system supporting a full life cycle and data security, and the method comprises the steps: receiving a creditor-debt relationship uploaded by a creditor or a debtor, recognizing a core attribute, and storing the core attribute; wherein the core attributes at least comprise a subject identifier, a debt amount, a performance period and a right obligation type; creating child nodes in one-to-one correspondence with the core attributes, collecting real-time values of the core attributes, writing the real-time values into the child nodes, determining data sources, creating father nodes in one-to-one correspondence with the data sources, mounting the child nodes into the father nodes, and generating the verification tree. According to the invention, by configuring the circulation restriction rule, the abuse and illegal transfer of the digital certificate can be prevented, the fine management of the digital certificate is realized, and the whole circulation process can be recorded, so that the full-life-cycle supervision of the digital certificate is realized, and the management efficiency of the digital certificate is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of digital credential management technology, and in particular to a blockchain digital credential management method and system that supports the entire lifecycle and data security. Background Technology

[0002] Digital certificates of creditor-debtor relationships refer to information carriers that record and manage the creditor-debtor relationship between debtors and creditors in electronic form. With the development of blockchain technology, distributed ledger technology, and digital asset management, the application of digital certificates is gradually becoming more widespread. In scenarios such as finance, inter-enterprise transactions, procurement, and supply chain management, traditional paper certificates suffer from problems such as data silos, uncontrolled circulation, and difficulty in risk management. Digital certificates, on the other hand, can achieve tamper-proof and traceable records through blockchain, effectively ensuring the transparency and security of creditor-debtor relationships.

[0003] In existing technologies, the verification, updating, and circulation of digital voucher attributes often rely on a single data source or manual verification, which can easily lead to information silos or delays, affecting the real-time performance and accuracy of digital vouchers.

[0004] Therefore, "how to conduct full lifecycle supervision of digital credentials" is the technical problem that this invention aims to solve. Summary of the Invention

[0005] The purpose of this invention is to provide a blockchain digital certificate management method and system that supports full lifecycle and data security, in order to solve the problem of "how to supervise digital certificates throughout their entire lifecycle" raised in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A method for managing blockchain digital credentials that supports the entire lifecycle and data security, the method comprising:

[0008] Receive creditor-debtor relationships uploaded by creditors or debtors, identify core attributes, wherein the core attributes include at least: subject identifier, debt amount, performance period and type of rights and obligations;

[0009] Create child nodes corresponding to the core attributes one by one, collect the real-time values ​​of the core attributes and write them into the child nodes, determine the data source, create parent nodes corresponding to the data sources one by one, attach the child nodes to the parent nodes, generate a verification tree, use the data sources to build several verification links, map them into the verification tree, perform combined verification on the core attributes, and output the verification results.

[0010] Extract the element items from each core attribute, write them into a preset template, select a hash function to hash the element items, generate a digital fingerprint, edit the index information that corresponds one-to-one with each creditor-debtor relationship, establish the correspondence between the index information and the digital fingerprint, and upload it to the blockchain for storage.

[0011] Construct digital vouchers, configure circulation restriction rules for digital vouchers, send them in parallel to a preset platform, obtain business activity records, record the circulation process of digital vouchers, and update the creditor-debtor relationship.

[0012] Furthermore, the step of receiving the creditor-debtor relationship uploaded by the creditor or debtor and identifying its core attributes includes:

[0013] Edit several evaluation rules and determine the risk score corresponding to each evaluation rule;

[0014] By comparing the evaluation rules and creditor-debtor relationships, and adding all the risk scores, the total risk value is obtained.

[0015] Furthermore, the method also includes:

[0016] Insert tags generated from the total risk value into the blockchain, and divide the total risk value into several intervals;

[0017] Set a color that corresponds one-to-one with the interval, and insert color identifiers into the creditor-debtor relationship.

[0018] Furthermore, the steps of establishing several verification links, mapping them to the verification tree, performing combined verification on the core attributes, and outputting the verification results include:

[0019] Mark the paths in the verification tree, where each path corresponds to a verification link;

[0020] A hierarchical activation mechanism is embedded in the verification tree.

[0021] Furthermore, the steps of extracting feature items, writing them into a preset template, selecting a hash function, hashing the feature items, and generating a digital fingerprint include:

[0022] Create a lookup table consisting of creditor-debtor relationship items and digital fingerprint items;

[0023] Establish an identity verification mechanism, and grant access to the lookup table after successful verification.

[0024] Furthermore, the steps of constructing digital vouchers, configuring circulation restriction rules for digital vouchers, sending them in parallel to a preset platform, obtaining business activity records, recording the circulation process of digital vouchers, and updating the creditor-debtor relationship include:

[0025] Edit the emergency response strategy and upload it to the preset platform;

[0026] When the business activity record deviates from the circulation restriction rules, the emergency response strategy is activated.

[0027] Furthermore, the system includes:

[0028] The attribute collection module is used to receive creditor-debtor relationships uploaded by creditors or debtors and identify core attributes, wherein the core attributes include at least: subject identifier, debt amount, performance period and type of rights and obligations;

[0029] The debt verification module is used to create child nodes that correspond one-to-one with the core attributes, collect the real-time values ​​of the core attributes and write them into the child nodes, determine the data source, create parent nodes that correspond one-to-one with the data source, attach the child nodes to the parent nodes, generate a verification tree, build several verification links using the data source, map them into the verification tree, perform combined verification of the core attributes, and output the verification results.

[0030] The digital fingerprint storage module is used to extract element items from each core attribute, write them into a preset template, select a hash function to hash the element items, generate a digital fingerprint, edit index information that corresponds one-to-one with each creditor-debtor relationship, establish the correspondence between the index information and the digital fingerprint, and upload it to the blockchain for storage.

[0031] The voucher management module is used to construct digital vouchers, configure circulation restriction rules for digital vouchers, send them to a preset platform in parallel, obtain business activity records, record the circulation process of digital vouchers, and update the creditor-debtor relationship.

[0032] Furthermore, the attribute acquisition module includes:

[0033] The editing unit is used to edit several evaluation rules and determine the risk score corresponding to each evaluation rule;

[0034] The unit is used to obtain the evaluation rules and creditor-debtor relationships, and to superimpose all risk scores to obtain the total risk value.

[0035] Furthermore, the debt verification module includes:

[0036] A marking unit is used to mark the paths in the verification tree, wherein each path corresponds to a verification link;

[0037] An embedding unit is used to embed a hierarchical activation mechanism into the verification tree.

[0038] Furthermore, the digital fingerprint storage module includes:

[0039] Create a unit to create a lookup table consisting of creditor-debtor relationship items and digital fingerprint items;

[0040] An open unit is used to establish an authentication mechanism and, after successful authentication, grants access to view the lookup table.

[0041] Compared with the prior art, the beneficial effects of the present invention are:

[0042] By constructing a verification tree, the main information of the creditor-debtor relationship can be displayed intuitively. Authenticity verification is performed sequentially according to the verification chain, timely identification of risk information, and improvement of the security of digital certificates. This avoids external risks and effectively ensures the stable circulation of digital certificates. Generating digital fingerprints improves the efficiency of certificate authenticity verification, prevents tampering, and ensures data integrity. Utilizing blockchain to store digital certificates further enhances their security. Configuring circulation restriction rules prevents the abuse and illegal transfer of digital certificates, enabling refined management and ensuring the entire circulation process is recorded. This achieves full lifecycle supervision of digital certificates, significantly improving management efficiency. Attached Figure Description

[0043] Figure 1 A flowchart illustrating a blockchain digital credential management method that supports full lifecycle and data security, as provided in an embodiment of the present invention.

[0044] Figure 2 This is a first sub-process flowchart of the blockchain digital credential management method supporting full lifecycle and data security provided in an embodiment of the present invention;

[0045] Figure 3 This is a second sub-process flowchart of the blockchain digital credential management method supporting full lifecycle and data security provided in this embodiment of the invention;

[0046] Figure 4 This is a third sub-process flowchart of the blockchain digital credential management method supporting full lifecycle and data security provided in an embodiment of the present invention;

[0047] Figure 5 This is a fourth sub-process flowchart of the blockchain digital certificate management method supporting full lifecycle and data security provided in an embodiment of the present invention;

[0048] Figure 6 A block diagram illustrating the composition of a blockchain digital credential management system supporting full lifecycle and data security, as provided in an embodiment of the present invention.

[0049] Figure 7This is a block diagram illustrating the composition of the attribute collection module in a blockchain digital credential management system that supports full lifecycle and data security, as provided in an embodiment of the present invention.

[0050] Figure 8 A block diagram illustrating the composition of the debt verification module in a blockchain digital certificate management system that supports full lifecycle and data security, as provided in this embodiment of the invention.

[0051] Figure 9 A block diagram illustrating the composition of the digital fingerprint storage module in a blockchain digital credential management system that supports full lifecycle and data security, as provided in an embodiment of the present invention.

[0052] Figure 10 This is a block diagram of the credential management module in a blockchain digital credential management system that supports the entire lifecycle and data security, as provided in an embodiment of the present invention. Detailed Implementation

[0053] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0054] In Example 1, Figure 1 The implementation flow of the blockchain digital certificate management method supporting full lifecycle and data security provided by an embodiment of the present invention is illustrated below:

[0055] S100: Receive creditor-debtor relationships uploaded by creditors or debtors, identify core attributes, wherein the core attributes include at least: subject identifier, debt amount, performance period, and type of rights and obligations.

[0056] A digital management platform for creditor and debtor relationships is constructed. This platform receives data upload requests from users and determines the user's role based on the request content. The user role can be either a creditor or a debtor. The platform receives creditor-debtor relationships uploaded by either creditor or debtor, analyzes and standardizes these relationships, and identifies content directly related to the debt, i.e., core attributes. These core attributes include: a unique identifier to identify the creditor or debtor; the debt amount reflecting the scale of the debt; the performance period to limit the timeframe for performance; and the types of rights and obligations that define the boundaries of the rights and obligations of both parties.

[0057] S200: Create child nodes corresponding one-to-one with the core attributes, collect the real-time values ​​of the core attributes and write them into the child nodes, determine the data source, create parent nodes corresponding one-to-one with the data source, attach the child nodes to the parent nodes, generate a verification tree, use the data source to build several verification links, map them into the verification tree, perform combined verification on the core attributes, and output the verification results.

[0058] Each core attribute has a corresponding child node. Real-time values ​​of these core attributes are continuously collected, representing the current amount of debt, repayment period, or remaining installment payment amount. These real-time values ​​are written to the corresponding child nodes. The data source is determined; it can be a financial system, bank statements, or other publicly available data. A parent node is created for each data source, and child nodes are attached to their respective parent nodes according to their data source relationships. This generates a hierarchical structure—the verification tree—with data sources as upper-level nodes and core attributes as lower-level nodes. Both parent and child nodes are logical nodes, not physical processing devices. The verification tree is a tree-like data processing structure, similar to a binary tree in existing technologies. By activating each path, the verification tree updates or verifies real-time values ​​sequentially, enabling multi-source verification of real-time values ​​and ensuring their accuracy.

[0059] Establish a verification link between the digital management platform and the data source. Verify the real-time value of each core attribute through the data source to ensure the authenticity and accuracy of the real-time value.

[0060] S300: Extract the element items from each core attribute, write them into a preset template, select a hash function to hash the element items, generate a digital fingerprint, edit the index information corresponding to each creditor-debtor relationship, establish the correspondence between the index information and the digital fingerprint, and upload it to the blockchain for storage.

[0061] From each core attribute, element items are extracted, where element items are specific numerical values. For example, if the core attributes are debt amount: 100,000 yuan and repayment period: 2 months, the element items are 100,000 yuan and 2 months. These element items are written into the template sequentially according to a fixed field order and data format. A hash function is selected, such as SHA-256 or MD5. Using the hash function, a hash operation is performed on all element items written into the template to generate a unique hash value corresponding to the creditor-debtor relationship. This hash value is defined as a digital fingerprint. The advantage of this method is that it not only enables rapid comparison, verification, and deduplication of creditor-debtor relationships without exposing original sensitive information, but also ensures that the hash result changes when any element item changes, thus providing a data foundation for the integrity verification and subsequent transfer of creditor-debtor relationships.

[0062] Generate index information that corresponds one-to-one with each creditor-debtor relationship. The index information includes relationship identifiers, subject identifier summaries, timestamps, and status identifiers for quick location of creditor-debtor relationships. Establish the correspondence between the index information and digital fingerprints. Write the index information, digital fingerprints, and creditor-debtor relationships into the blockchain for storage.

[0063] S400: Construct digital vouchers, configure circulation restriction rules for digital vouchers, send them in parallel to a preset platform, obtain business activity records, record the circulation process of digital vouchers, and update the creditor-debtor relationship.

[0064] Using pre-defined coding rules, digital certificates are created that correspond one-to-one with creditor-debtor relationships. These coding rules are formulated by the administrators of the digital management platform. Circulation restriction rules are set for these digital certificates, including the scope of eligible entities, the number of times they can be circulated, the circulation period, and the business conditions that trigger circulation. These rules are sent in parallel to pre-defined platforms, which can be blockchain platforms, financial business management platforms, supply chain collaboration platforms, asset management platforms, or individual user terminals. After the digital certificates are put into use, business activity records related to them are continuously acquired from the digital management platform, data sources, and pre-defined platforms. These records include creditor-debtor transfer contracts, settlement vouchers, transaction vouchers, and performance records. The circulation process of the digital certificates is collected, including transfer, pledge, freezing, and write-off. Based on this process, the corresponding creditor-debtor relationships are updated.

[0065] In Example 2, Figure 2 This diagram illustrates the first sub-process flowchart of the blockchain digital certificate management method supporting full lifecycle and data security provided by an embodiment of the present invention. The following details the steps of receiving the creditor-debtor relationship uploaded by the creditor or debtor and identifying core attributes:

[0066] S101: Edit several evaluation rules and determine the risk score corresponding to each evaluation rule.

[0067] Edit several evaluation rules, each of which corresponds to a risk score. For example, one evaluation rule is: when the debtor's credit rating is high, the corresponding risk score is set to 15 points; when the credit rating is medium, the corresponding risk score is set to 5 points.

[0068] S102: Compare the evaluation rules and creditor-debtor relationships, and add up all the risk scores to obtain the total risk value.

[0069] Calculate the risk score for each creditor-debtor relationship under all evaluation rules, and sum them up to obtain the total risk value.

[0070] In Embodiment 3, unlike Embodiment 1, the method further includes:

[0071] Insert tags generated from the total risk value into the blockchain, and divide the total risk value into several intervals;

[0072] Set a color that corresponds one-to-one with the interval, and insert color identifiers into the creditor-debtor relationship.

[0073] A tag generated from the total risk value is inserted into the blockchain, dividing the total risk value into several intervals. For example, 0-50 points is divided into the first interval, 51-100 points into the second interval, and so on. A corresponding identifier color is assigned to each interval to visually represent the risk level represented by that interval, and the identifier color is inserted into the corresponding creditor-debtor relationship in the blockchain.

[0074] In Example 4, Figure 3 This paper illustrates a second sub-process flowchart of a blockchain digital certificate management method supporting full lifecycle and data security, provided by an embodiment of the present invention. The following details the steps of establishing several verification links, mapping them to the verification tree, performing combined verification of the core attributes, and outputting the verification results:

[0075] S201: Mark the paths in the verification tree, where each path corresponds to a verification link.

[0076] The node chain consisting of the parent node, child node and corresponding mounting relationship in the verification tree is defined as a path, and each path corresponds to a verification link.

[0077] S202: Embed a hierarchical activation mechanism into the verification tree.

[0078] When validating core attributes, a tiered activation mechanism is activated, which means that each path in the validation tree is activated in turn, and the real-time value of the core attribute under each path is updated or validated.

[0079] In Example 5, Figure 4 The diagram illustrates the third sub-process flowchart of the blockchain digital certificate management method supporting full lifecycle and data security provided by an embodiment of the present invention. The following details the steps of extracting element items, writing them into a preset template, selecting a hash function, hashing the element items, and generating a digital fingerprint:

[0080] S301: Create a lookup table consisting of creditor-debtor relationship items and digital fingerprint items.

[0081] Create a lookup table, which consists of creditor-debtor relationship items and digital fingerprint items.

[0082] S302: Establish an authentication mechanism and grant access to the lookup table after successful authentication.

[0083] Establish an identity verification mechanism to identify users attempting to access the lookup table. Identity verification includes, but is not limited to, financial account information authentication, biometric authentication, and device fingerprint authentication. After successful verification, grant access to the lookup table so that users can check creditor-debtor relationships and monitor abnormal behavior based on digital fingerprints.

[0084] In Example 6, Figure 5 The diagram illustrates the fourth sub-process flowchart of the blockchain digital certificate management method supporting full lifecycle and data security provided by an embodiment of the present invention. The following details the steps of constructing digital certificates, configuring circulation restriction rules for digital certificates, sending them in parallel to a preset platform, obtaining business activity records, recording the circulation process of digital certificates, and updating the creditor-debtor relationship:

[0085] S401: Edit the emergency response strategy and upload it to the preset platform.

[0086] Edit emergency response strategies, which may include: freezing creditor-debtor relationships, sending alert emails or SMS messages to notify creditors and debtors, etc., and upload the emergency response strategies to a preset platform for storage.

[0087] S402: When the business activity record deviates from the circulation restriction rule, the emergency response strategy is activated.

[0088] When business activity records deviate from circulation restriction rules, the emergency response strategy is activated. For example, if a query of business activity records reveals that a digital voucher can be circulated more times than the number limited in the circulation restriction rules, the emergency response strategy is activated to freeze the corresponding creditor-debtor relationship.

[0089] Figure 6 This diagram illustrates the structural composition of a blockchain digital credential management system supporting full lifecycle and data security, as provided in an embodiment of the present invention. The blockchain digital credential management system 1 supporting full lifecycle and data security includes:

[0090] The attribute acquisition module 11 is used to receive creditor-debtor relationships uploaded by creditors or debtors and identify core attributes, wherein the core attributes include at least: subject identifier, debt amount, performance period and type of rights and obligations;

[0091] The debt verification module 12 is used to create child nodes that correspond one-to-one with the core attributes, collect the real-time values ​​of the core attributes and write them into the child nodes, determine the data source, create parent nodes that correspond one-to-one with the data source, attach the child nodes to the parent nodes, generate a verification tree, build several verification links using the data source, map them to the verification tree, perform combined verification of the core attributes, and output the verification results.

[0092] The digital fingerprint storage module 13 is used to extract element items from each core attribute, write them into a preset template, select a hash function to hash the element items, generate a digital fingerprint, edit index information that corresponds one-to-one with each creditor-debtor relationship, establish the correspondence between the index information and the digital fingerprint, and upload it to the blockchain for storage.

[0093] The voucher management module 14 is used to construct digital vouchers, configure circulation restriction rules for digital vouchers, send them to a preset platform in parallel, obtain business activity records, record the circulation process of digital vouchers, and update the creditor-debtor relationship.

[0094] Figure 7 This diagram illustrates the composition of the attribute acquisition module 11 in a blockchain digital certificate management system supporting full lifecycle and data security, as provided in an embodiment of the present invention. The attribute acquisition module 11 includes:

[0095] Editing unit 111 is used to edit several evaluation rules and determine the risk score corresponding to each evaluation rule;

[0096] Unit 112 is used to obtain the evaluation rules and creditor-debtor relationships, and to superimpose all risk scores to obtain the total risk value.

[0097] Figure 8 This diagram illustrates the structural composition of the debt verification module 12 in a blockchain digital certificate management system supporting full lifecycle and data security, as provided in an embodiment of the present invention. The debt verification module 12 includes:

[0098] Marking unit 121 is used to mark the paths in the verification tree, wherein each path corresponds to a verification link;

[0099] Embedding unit 122 is used to embed a hierarchical activation mechanism into the verification tree.

[0100] Figure 9 This diagram illustrates the structural composition of the digital fingerprint storage module 13 in a blockchain digital credential management system supporting full lifecycle and data security, as provided in an embodiment of the present invention. The digital fingerprint storage module 13 includes:

[0101] Create unit 131 to create a lookup table consisting of creditor-debtor relationship items and digital fingerprint items;

[0102] Open unit 132 is used to establish an authentication mechanism and, after successful authentication, grant access to view the lookup table.

[0103] Figure 10 This diagram illustrates the structural composition of the credential management module 14 in a blockchain digital credential management system supporting full lifecycle and data security, as provided in an embodiment of the present invention. The credential management module 14 includes:

[0104] Upload unit 141 is used to edit emergency response strategies and upload them to the preset platform;

[0105] Activation unit 142 is used to activate the emergency response strategy when the business activity record deviates from the circulation restriction rule.

[0106] The attribute acquisition module 11 is mainly used to complete step S100, the creditor and debtor verification module 12 is mainly used to complete step S200, the digital fingerprint storage module 13 is mainly used to complete step S300, and the voucher management module 14 is mainly used to complete step S400.

[0107] Editing unit 111 is mainly used to complete step S101, and obtaining unit 112 is mainly used to complete step S102;

[0108] The marking unit 121 is mainly used to complete step S201, and the embedding unit 122 is mainly used to complete step S202;

[0109] The creation unit 131 is mainly used to complete step S301, and the opening unit 132 is mainly used to complete step S302;

[0110] The uploading unit 141 is mainly used to complete step S401, and the activation unit 142 is mainly used to complete step S402.

[0111] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0112] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

[0113] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A blockchain digital credential management method supporting full lifecycle and data security, characterized in that, The method includes: Receive creditor-debtor relationships uploaded by creditors or debtors, identify core attributes, wherein the core attributes include at least: subject identifier, debt amount, performance period and type of rights and obligations; Create child nodes corresponding to the core attributes one by one, collect the real-time values ​​of the core attributes and write them into the child nodes, determine the data source, create parent nodes corresponding to the data sources one by one, attach the child nodes to the parent nodes, generate a verification tree, use the data sources to build several verification links, map them into the verification tree, perform combined verification on the core attributes, and output the verification results. Extract the element items from each core attribute, write them into a preset template, select a hash function to hash the element items, generate a digital fingerprint, edit the index information that corresponds one-to-one with each creditor-debtor relationship, establish the correspondence between the index information and the digital fingerprint, and upload it to the blockchain for storage. Construct digital vouchers, configure circulation restriction rules for digital vouchers, send them in parallel to a preset platform, obtain business activity records, record the circulation process of digital vouchers, and update the creditor-debtor relationship.

2. The blockchain digital certificate management method supporting full lifecycle and data security according to claim 1, characterized in that, The steps of receiving creditor-debtor relationships uploaded by creditors or debtors and identifying core attributes include: Edit several evaluation rules and determine the risk score corresponding to each evaluation rule; By comparing the evaluation rules and creditor-debtor relationships, and adding all the risk scores, the total risk value is obtained.

3. The blockchain digital certificate management method supporting full lifecycle and data security according to claim 2, characterized in that, The method further includes: Insert tags generated from the total risk value into the blockchain, and divide the total risk value into several intervals; Set a color that corresponds one-to-one with the interval, and insert color identifiers into the creditor-debtor relationship.

4. The blockchain digital certificate management method supporting full lifecycle and data security according to claim 1, characterized in that, The steps of establishing several verification links, mapping them to the verification tree, performing combined verification on the core attributes, and outputting the verification results include: Mark the paths in the verification tree, where each path corresponds to a verification link; A hierarchical activation mechanism is embedded in the verification tree.

5. The blockchain digital certificate management method supporting full lifecycle and data security according to claim 3, characterized in that, The steps of extracting feature items, writing them into a preset template, selecting a hash function, hashing the feature items, and generating a digital fingerprint include: Create a lookup table consisting of creditor-debtor relationship items and digital fingerprint items; Establish an identity verification mechanism, and grant access to the lookup table after successful verification.

6. The blockchain digital certificate management method supporting full lifecycle and data security according to claim 1, characterized in that, The steps of constructing digital vouchers, configuring circulation restriction rules for digital vouchers, sending them in parallel to a preset platform, obtaining business activity records, recording the circulation process of digital vouchers, and updating the creditor-debtor relationship include: Edit the emergency response strategy and upload it to the preset platform; When the business activity record deviates from the circulation restriction rules, the emergency response strategy is activated.

7. A blockchain digital credential management system supporting full lifecycle and data security, characterized in that, The system includes: The attribute collection module is used to receive creditor-debtor relationships uploaded by creditors or debtors and identify core attributes, wherein the core attributes include at least: subject identifier, debt amount, performance period and type of rights and obligations; The debt verification module is used to create child nodes that correspond one-to-one with the core attributes, collect the real-time values ​​of the core attributes and write them into the child nodes, determine the data source, create parent nodes that correspond one-to-one with the data source, attach the child nodes to the parent nodes, generate a verification tree, build several verification links using the data source, map them into the verification tree, perform combined verification of the core attributes, and output the verification results. The digital fingerprint storage module is used to extract element items from each core attribute, write them into a preset template, select a hash function to hash the element items, generate a digital fingerprint, edit index information that corresponds one-to-one with each creditor-debtor relationship, establish the correspondence between the index information and the digital fingerprint, and upload it to the blockchain for storage. The voucher management module is used to construct digital vouchers, configure circulation restriction rules for digital vouchers, send them to a preset platform in parallel, obtain business activity records, record the circulation process of digital vouchers, and update the creditor-debtor relationship.

8. The blockchain digital certificate management system supporting full lifecycle and data security according to claim 7, characterized in that, The attribute acquisition module includes: The editing unit is used to edit several evaluation rules and determine the risk score corresponding to each evaluation rule; The unit is used to obtain the evaluation rules and creditor-debtor relationships, and to superimpose all risk scores to obtain the total risk value.

9. The blockchain digital certificate management system supporting full lifecycle and data security according to claim 7, characterized in that, The debt verification module includes: A marking unit is used to mark the paths in the verification tree, wherein each path corresponds to a verification link; An embedding unit is used to embed a hierarchical activation mechanism into the verification tree.

10. The blockchain digital certificate management system supporting full lifecycle and data security according to claim 8, characterized in that, The digital fingerprint storage module includes: Create a unit to create a lookup table consisting of creditor-debtor relationship items and digital fingerprint items; An open unit is used to establish an authentication mechanism and, after successful authentication, grants access to view the lookup table.

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