CN113554421A - Police affair resource data governance cooperation method based on block chain - Google Patents
Police affair resource data governance cooperation method based on block chain Download PDFInfo
- Publication number
- CN113554421A CN113554421A CN202111085205.0A CN202111085205A CN113554421A CN 113554421 A CN113554421 A CN 113554421A CN 202111085205 A CN202111085205 A CN 202111085205A CN 113554421 A CN113554421 A CN 113554421A
- Authority
- CN
- China
- Prior art keywords
- data
- block
- block chain
- user
- chain
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 63
- 230000008569 process Effects 0.000 claims abstract description 18
- 238000005516 engineering process Methods 0.000 claims abstract description 14
- 238000007726 management method Methods 0.000 claims description 51
- 230000007246 mechanism Effects 0.000 claims description 21
- 238000005192 partition Methods 0.000 claims description 17
- 238000013475 authorization Methods 0.000 claims description 14
- 239000000126 substance Substances 0.000 claims description 13
- 238000004422 calculation algorithm Methods 0.000 claims description 11
- 238000004364 calculation method Methods 0.000 claims description 11
- 230000008859 change Effects 0.000 claims description 11
- 238000009826 distribution Methods 0.000 claims description 8
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 6
- 230000008901 benefit Effects 0.000 claims description 4
- 238000012546 transfer Methods 0.000 claims description 4
- 241000022852 Letis Species 0.000 claims description 3
- 238000009430 construction management Methods 0.000 claims description 3
- 125000004122 cyclic group Chemical group 0.000 claims description 3
- 238000009795 derivation Methods 0.000 claims description 3
- 230000003993 interaction Effects 0.000 claims description 3
- 238000013507 mapping Methods 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 7
- 238000013523 data management Methods 0.000 abstract description 6
- 238000012545 processing Methods 0.000 description 11
- 238000004458 analytical method Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000008520 organization Effects 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000010367 cloning Methods 0.000 description 1
- 238000013075 data extraction Methods 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 238000013524 data verification Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010606 normalization Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000012954 risk control Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q10/00—Administration; Management
- G06Q10/10—Office automation; Time management
- G06Q10/103—Workflow collaboration or project management
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
- G06F16/27—Replication, distribution or synchronisation of data between databases or within a distributed database system; Distributed database system architectures therefor
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q50/00—Information and communication technology [ICT] specially adapted for implementation of business processes of specific business sectors, e.g. utilities or tourism
- G06Q50/10—Services
- G06Q50/26—Government or public services
Landscapes
- Business, Economics & Management (AREA)
- Engineering & Computer Science (AREA)
- Strategic Management (AREA)
- Theoretical Computer Science (AREA)
- Human Resources & Organizations (AREA)
- Tourism & Hospitality (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Data Mining & Analysis (AREA)
- Databases & Information Systems (AREA)
- Marketing (AREA)
- Entrepreneurship & Innovation (AREA)
- General Business, Economics & Management (AREA)
- Economics (AREA)
- Educational Administration (AREA)
- Primary Health Care (AREA)
- Computing Systems (AREA)
- Health & Medical Sciences (AREA)
- Development Economics (AREA)
- General Engineering & Computer Science (AREA)
- General Health & Medical Sciences (AREA)
- Operations Research (AREA)
- Quality & Reliability (AREA)
- Storage Device Security (AREA)
Abstract
The invention discloses a police service resource data governance cooperation method based on a block chain, belongs to the technical field of block chain cross-chain data cooperation technology and application of police service data management in the block chain technology, and applies the characteristics of block chain multi-party cooperation, safety, credibility and the like to the construction of data standards, the guarantee of data safety and the control of a data sharing process. On the basis of realizing comprehensive collection of police resource data, a case network is built and integrated by using technical characteristics such as a block chain distributed account book and public and private key encryption, a service data standard commonly recognized by each public security department is built, a cross-department service scene is built by means of an intelligent contract, and cross-department service collaboration is supported efficiently.
Description
Technical Field
The invention belongs to the technical field of application of a block chain cross-chain data cooperation technology and police service data management in the block chain technology, and particularly relates to a police service resource data governance cooperation method based on a block chain.
Background
With the continuous improvement of informatization level, a public security department generates, collects and stores a large amount of police resource data in the case processing process. The branch mechanisms of the public security industry are numerous, the informatization levels of all the mechanisms are different, the mechanisms are difficult to organically combine with other departments, the information is easily collected and updated untimely and inaccurate in the working processes of police service resource data generation, transmission, processing, storage and the like, common knowledge cannot be formed among all the departments for the co-construction and sharing modes of case resources, and cross-department and cross-hierarchy information transmission and data sharing are still difficult to realize.
The problem faced by current police resource data is summarized in three aspects: 1. the data security problem and the data tampering problem are solved, and in the system, if data extraction personnel, system administrators and database management personnel are communicated in series, some data in the database are tampered, so that the credibility of the data in the database is seriously influenced. 2. The problem of expansibility of the data convergence platform is that when a new subject mechanism or system needs to submit data to the sharing platform, complex adaptation work needs to be performed. 3. After the data are gathered, whether the data are used in a specified range or not and whether the data are illegally used or not are judged, and higher requirements are put forward on a management method and a management tool of a police resource data management department.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a police service resource data governance cooperative method based on a block chain aiming at the defects of the background technology, wherein the characteristics of multi-party cooperation, safety, credibility and the like of the block chain are applied to the construction of a data standard, the guarantee of data safety and the control of a data sharing process; on the basis of realizing comprehensive collection of police resource data, a case network is built and integrated by using technical characteristics such as a block chain distributed account book and public and private key encryption, a service data standard commonly recognized by each public security department is built, a cross-department service scene is built by means of an intelligent contract, cross-department service collaboration is efficiently supported through practice, and the method has a very good advantage for realizing police resource data sharing and case service collaboration based on the characteristics of non-falsification, decentralization, data encryption and trust transfer of a block chain technology.
The invention adopts the following technical scheme for solving the technical problems:
a police service resource data governance cooperative method based on a block chain specifically comprises the following steps:
step 1, constructing a case data quality collaborative model based on a block chain: through governing model structure, method, flow and number
Introducing an anti-tampering technology according to sharing and access control, data updating and intelligent contracts to achieve a governing target based on the characteristics of a regional chain distributed account book, an encryption algorithm and a consensus mechanism;
step 2, establishing a multi-party cooperation standard: implementing complexities by establishing rule-based data and standardized intelligent contracts
Each record of the business logic industry standard library chain is orderly linked from the back to the front, and the method is safe and stable, cannot be tampered and can be traced;
step 3, the intelligent contract forms a solidified transparent service: performing solidified transparent business logic by means of intelligent contracts
Performing hard core control on data standards and operation flows of various services, and storing service data through intelligent cooperation, thereby effectively avoiding service conflicts caused by problems of management modes, rule changes, system upgrading and the like among departments;
step 4, the multi-partition user authorization mechanism guarantees privacy security: user information authorization for realizing transactor and business management and business
Unified configuration management is provided for service data items, protocol management, protocol content management, authorization modes, electronic approval process management, cloud storage encryption and the like;
and 5, finishing the cooperative treatment of the block chain data.
As a further preferable scheme of the police service resource data governance collaborative method based on the block chain, in step 1, a tamper-proof technology is introduced, specifically as follows:
attackerFirst before attempting to tamper with the newest block
For the data of the block, an attacker needs to modify the hash value of the block and recalculate the hash values of all the blocks; setting the current full-network honesty node computing power to be per second
Calculating the secondary hash value, wherein the block hash value under the current calculation difficulty contains
A prefix binary 0; the attacker is newly added computing power with the magnitude of computing power per second
Calculating a secondary hash value; if no new node participates, the probability that the honest node obtains a new block in each second is
The probability of an attacker obtaining a new block is
(ii) a Initial height difference between attacker and honest node
Is provided with
Is as follows
Height difference of second, height difference
The probability of change per second is divided into 3 cases:
event(s)
: if the attacker does not generate a block, the honest node generates a block,
plus 1, probability
；
Event(s)
: if the attacker does not generate a block, the honest node generates a block,
minus 1, probability
；
Event(s)
: if the attacker does not generate a block, the honest node generates a block,
invariance, probability
；
The height difference per second
The variation probability distribution of (a) conforms to a plurality of distributions:
when in use
The attacker successfully pursues honestyThe node issues the block chain, and the data is successfully tampered;
in that
Within a second, will appear
Event of secondary altitude change, device
Is composed of
The number of occurrences; when the tampering is successful, the user may,
at least take place
Then, set
Is an event
The difference between the actual number of occurrences and the minimum number of occurrences, then
The actual number of occurrences is
；
The number of occurrences is based on the number of occurrences of the first two, and is
Wherein, in the step (A),
；
then is at
Within seconds, the probability of an attacker pursuing honest nodes is as follows:
As a further preferable scheme of the coordination method for police service resource data governance based on the block chain, the step 2 is specifically divided into two stages:
the first stage is outside the chain, and consists of an identity authentication module, a right management module and a supervision management module, and is used for verifying the user state, giving rewards to the user and supervising the user behavior;
the second stage is in the chain, which is composed of industry standard library chains, wherein each industry standard library chain is used for storing and reading police service resource data information of the industry standard library chain; and the user is verified to be a registered user through the identity authentication module, and the registered user carries out interaction between the first stage and the second stage by calling the intelligent contract.
As a further preferable scheme of the block chain-based police service resource data governance collaborative method of the present invention, a block chain-based police service resource data standard co-construction management algorithm and process are as follows:
step 2.1, the police service resource data demander submits a registration application, and the identity of the police service resource data demander is verified through an identity authentication module to obtain a corresponding return state, wherein the police service resource data demander becomes a registered user if the registration is successful, and otherwise the police service resource data demander fails to register;
step 2.2, the data demander has corresponding integral information through the authority management module;
step 2.3, the data demander has corresponding supervision information through a supervision management module;
step 2.4, the data demander calls an intelligent contract to apply, inquire and clone the data standard;
and 2.5, automatically completing corresponding operation by the police service resource data standard library chain by means of an intelligent contract.
As a further preferable scheme of the police service resource data governance collaborative method based on the block chain, in step 3, the storage of contract codes and states by the block chain guarantees the reliability and observability of contract storage, an intelligent contract is a code stored on the block chain, a contract state is stored in the block chain, the contract codes are executed through block chain link points, a contract calculation result through a distributed consistency algorithm is stored in the block chain, and the contract state is updated; the state transition of the blockchain can be given as shown in the formula:
wherein the content of the first and second substances,
a state transfer function for a block chain;
for block chains at time
The state of (1);
is a police service;
the method comprises the following steps that services are collected and placed into blocks, each block is indicated by a hash value of the block, one block not only has a set of hash and transaction of the previous block, but also has a block chain state from the block, the hash of the previous block is placed into the block, and therefore the block is connected into a chain, and the specific expression is as follows:
the hash of the previous block is put into the block, so that the block is connected into a chain to form a nested function, wherein the specific expression is as follows:
the block chain stores all case services in a block, so that the following tracing query is facilitated, the latest state of the block chain is stored in an MPT, and the MPT is written as merkle patricia trie, wherein the MPT is a combined abbreviation of a Mercker tree and a Telejia tree, is an improved data structure which integrates the advantages of the two tree structures of the Mercker tree and the prefix tree, is a very important data structure in an Ether, and is used for storing a state change state tree of the police service, generating a latest state abstract in real time, and further quickly finding required information according to a state keyword Key.
5. The cooperative police service resource data governance method based on the block chain as claimed in claim 1, wherein:
in step 4, the query keyword submitted by the data user should meet two security requirements, one is the privacy of the query keyword, namely the query keyword of the data user cannot be delivered to the cloud server in a plaintext form; second, if the query keyword is unlinkable, assume that the data user
All the contained keys need to be retrieved from the encrypted inverted index
The data user utilizes the key by the following two steps
Encrypting the query key
And a query trapdoor is generated,
first, the data user
Randomly selecting an element
The following formula is calculated, wherein,
is from a collection
The random numbers are selected randomly and uniformly: to facilitate writing
Wherein the content of the first and second substances,
is two orders of prime number
The cyclic multiplication group of (a) is,
into a group
A generator of (2); defining bilinear mappings
And two secure hash functions
Respectively hashing character strings of any length into groups
And group
An element of (1);
randomly and uniformly slave to a group for a key distribution center
The two elements selected above are used for generating a secret key;
secondly, for each
Data user u calculation
；
（1）
Wherein the content of the first and second substances,
in order to be a collection of attributes,
for the complete set of system attributes
Any one of the attributes of (a), (b), (c), (d) and (d) any one of (d), (d) and (d) any (d) and (d) an (d) an (d) an (d,
presentation group
One set of the above-mentioned (c) is,
is from a collection
Wherein the random number is randomly and uniformly selected,
，
is an attribute
A random attribute key is generated, and the random attribute key is generated,
；
data owner based on index key
Access rights requirement of, defining an access control tree
From
Starting from the root node of (1), in a top-down manner
Each node in
Constructing a polynomial
And is provided with
The number of the highest order term being the threshold for grounding
As little as 1, i.e.
(ii) a For root node
The data owner randomly selects a value
And is provided with
Data owner settings for any other node
；
When the data owner decides to revoke an attribute of the data consumer
He only needs to be an attribute
Generating a new attribute key
And use
With a full set of replacement keys
Sending out
Sending the data to a cloud server; when the cloud server receives
Then, first use
With a full set of updated attribute keys
Then, for each encrypted inverted list
Which has access to a control tree of
If, if
Contains an attribute
Then the cloud server uses the attribute key
Updating
In (1)
Is composed of
After update
Can be expressed as:
suppose that
Leaf node in
Corresponding attribute is
That is to say
；
The cloud server has strong storage and calculation capacity, is used for storing encrypted outsourced data, is also used for inquiring on the encrypted security index according to the inquiry trapdoor submitted by the data user and returning an encrypted inquiry result to the data user, and when the cloud receives the data user
Query trapdoor
Then, an encrypted inverted list is given
The cloud server can return the inverted list only if the following two conditions are satisfied simultaneously
Index of all encrypted data files: firstly, the
With a list of inversions
Inquiry authority, II
If true; the whole safety inquiry process is divided into the following two sub-processes:
the first subprocess is that the cloud server traps the door according to the query
Determining data users
Whether or not there is a pair index
The inquiry authority is specifically as follows:
let
Is an access control tree
For each leaf node
Let a
Representing the attribute of the leaf node representation, i.e.
If, if
Then, calculate:
if it is not
Then define
；
Wherein, the meaning of the characters can be known by formulas (1) and (2);
for each non-leaf node
With a node threshold of
If there is one containing
An
Set of child nodes of
And for each child node
All satisfy
Then calculate
Wherein the content of the first and second substances,
is the lagrange coefficient; if no such collection exists, a collection of attributes is indicated to the data consumer
Unsatisfied node
Is then defined
；
For access control tree
Root node of
After the above recursion operation, if
Then, the attribute set of the data user is described
Unsatisfied access control trees
Otherwise
When the above first sub-process is completed, if
Then it means that the data consumer is not aligned to the keyword
The query authority of (1); otherwise, the cloud server continues to execute a second sub-process to determine whether the following equation holds:
wherein the content of the first and second substances,
，
the meaning is shown in formula (2);
if the equality is true, the query keyword is indicated
And encrypting the inverted index
Index key in (1)
Equal, then the cloud server returns the index
All encrypted data files in the file system; data consumer uses file decryption key granted by data owner
Decrypting the ciphertext; the correctness of the security query can be verified by the following derivation:
if the trapdoor
Query keyword in (1)
And
middle index key word
Are equal, i.e.
Then:
compared with the prior art, the invention adopting the technical scheme has the following technical effects:
1. the invention solves the problems of safety and privacy protection of data sharing, and under a distributed account book sharing mechanism, each node stores the total police affair shared data, so that the traditional data center management mode is not applicable any more; in the data sharing process of the block chain, a national secret SM2 asymmetric encryption algorithm is adopted, each police resource data processing related personnel and sub-department are defined as a main body, and a set of encrypted and decrypted public and private keys are granted to each main body; when data are transmitted in a department, a main public key corresponding to the data is obtained, field-level encryption is carried out on a police affair resource data body, and then transaction of a block chain is formed and submitted to a public account book, so that police affair resource data which are totally shared are recorded in the block chain, but each field is encrypted, and the contradiction between real-time sharing, authentication change and safe utilization of the data is fundamentally solved;
2. the invention realizes credible police resource data sharing by means of a distributed account book: by means of the characteristics of the block chain distributed account book, all nodes on the chain participate in data storage and verification, all department nodes on the chain maintain the same public account book together, each department is guaranteed to have the most accurate and full police resource data, the transaction traceability is guaranteed through the characteristics of public and private key encryption technology, the transaction cannot be repudiated and damaged, and the privacy of individuals/units is guaranteed not to be revealed;
3. the method constructs an ecological mechanism for sharing and utilizing police service resource data, constructs a set of ecological mechanism for promoting sharing and utilizing of the police service resource data of the block chain by means of the Token mechanism of the block chain, and improves the enthusiasm of data sharing of departments; in practical application, a new mode of collecting business-driven data is explored, points are obtained through data sharing, and the use right of the data is obtained in the form of point consumption; the mechanism is solidified by using a block chain intelligent contract, the increment of the integral and the consumption of all nodes are visible, and the question of each department on fairness and authority is eliminated.
Drawings
FIG. 1 is a schematic diagram of a police resource data quality collaboration model of the present invention;
FIG. 2 is a flow of the multi-partition offload processing of the present invention;
fig. 3 is a flowchart of a coordination method for police resource data governance based on a block chain.
Detailed Description
The technical scheme of the invention is further explained in detail by combining the attached drawings:
the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A block chain-based police service resource data governance coordination method is disclosed, as shown in FIG. 1, and specifically comprises the following steps:
step 1, constructing a case data quality collaborative model based on a block chain: through governing model structure, method, flow and number
Introducing an anti-tampering technology according to sharing and access control, data updating and intelligent contracts to achieve a governing target based on the characteristics of a regional chain distributed account book, an encryption algorithm and a consensus mechanism;
step 2, establishing a multi-party cooperation standard: implementing complexities by establishing rule-based data and standardized intelligent contracts
Each record of the business logic industry standard library chain is orderly linked from the back to the front, and the method is safe and stable, cannot be tampered and can be traced;
step 3, the intelligent contract forms a solidified transparent service: performing solidified transparent business logic by means of intelligent contracts
Performing hard core control on data standards and operation flows of various services, and storing service data through intelligent cooperation, thereby effectively avoiding service conflicts caused by problems of management modes, rule changes, system upgrading and the like among departments;
step 4, the multi-partition user authorization mechanism guarantees privacy security: user information authorization for realizing transactor and business management and business
Unified configuration management is provided for service data items, protocol management, protocol content management, authorization modes, electronic approval process management, cloud storage encryption and the like;
and 5, finishing the cooperative treatment of the block chain data.
The method comprises the following specific steps: 001, constructing a data quality cooperation model based on a block chain:
by analyzing the data governance requirements in a big data environment, the problems of data standardization, data quality management, data safety, compliance and the like are the primary challenges facing data governance. The data standardization level comprises metadata management and main data management, the consistency, the normalization and the integrity of data are guaranteed on the basis, and the data quality is improved. The distributed account book characteristic of the block chain can guarantee data security and sharing, the privacy of the participants and users is guaranteed through an encryption mechanism, and the efficient opinion achievement under the multi-party collaboration environment can be guaranteed through a consensus mechanism. The schematic diagram of the police service resource data quality collaboration model of the invention is shown in fig. 1. The data management mainly comprises the aspects of data standardization, data quality management, data safety compliance and the like, and finally achieves the management targets of strategy consistency, risk control, operation compliance and value realization through the cooperative management of the three. The implementation of the governance target is mainly based on the characteristics of a block chain distributed account book, an encryption algorithm and a consensus mechanism and is realized through three aspects of a governance model structure and method flow, data sharing and access control, data updating and intelligent contracts.
And a block chain anti-tampering technology is introduced into the model, so that the data consistency is ensured. The blockchain technique guarantees data consistency using a workload-proof consensus mechanism. Suppose an attacker tries to tamper the first before the newest block
Block chunk data, an attacker must modify the chunk hash values and recalculate the hash values for all chunks afterwards. Assuming that the current full-network honest node computing power is per second
Calculating the secondary hash value, wherein the block hash value under the current calculation difficulty contains
The prefix is binary 0. The attacker is newly added computing power with the magnitude of computing power per second
And calculating a secondary hash value. For an attacker to calculate the past blocks mainly without influencing the generation speed of the new blocks, the calculation difficulty of the hash value of the new blocks cannot be increased, and for simplifying the calculation, no new node participates, and the probability that the honest node obtains the new blocks in each second is
The probability of an attacker obtaining a new block is
. Initial height difference between attacker and honest node
Is provided with
Is as follows
Height difference of second, height difference
The probability of change per second is divided into 3 cases.
Event(s)
The attacker does not generate blocks, the honest nodes generate blocks,
plus 1, probability
Event(s)
The attacker does not generate blocks, the honest nodes generate blocks,
minus 1, probability
Event(s)
The attacker does not generate blocks, the honest nodes generate blocks,
invariance, probability
Height difference per second
Is adapted to fit a plurality of distributions
When in use
And then, an attacker successfully catches up with the honest nodes, can distribute the block chains and successfully tampers the data. In that
Within a second, will appear
Event of secondary altitude change, device
Is composed of
The number of occurrences; when the tampering is successful, the user may,
at least take place
Then, set
Is an event
The difference between the actual number of occurrences and the minimum number of occurrences, then
The actual number of occurrences is
；
The number of occurrences is based on the number of occurrences of the first two, and is
Wherein, in the step (A),
. In that
Within seconds, the probability of an attacker pursuing honest nodes is
The police service resource data standard construction model based on the block chain is provided in the step, and by means of the ideas that technical data of the block chain is public, transparent and traceable, each crime record in an industry standard library is orderly linked from back to front, so that the police service resource data standard construction model has the characteristics of safety, stability, incapability of being tampered and traceable. The industry standard library chain network is an end-to-end distributed network which is constructed by all added nodes together, all the nodes are required to be maintained together, external data acquired by the internet and internal data stored in a block chain can be read by establishing a rule-based data and a standardized intelligent contract, complex business logic is realized, an application scheme of data standardization is finally constructed, and an important target of data management is realized.
002 standards for multiparty collaboration are constructed:
the blockchain is a unique way for storing data in cryptocurrency such as bitcoin, and is a self-referenced data structure, which is commonly used for storing a large amount of transaction information. Based on a data quality collaborative model, the invention provides a police service resource data standard management method based on a block chain on the basis of comprehensively considering a data standard management model, and the invention realizes the ordered linking of each police service resource record from back to front by utilizing the design idea of a transparent and traceable product architecture of data disclosure of the block chain technology, and has the characteristics of safety, stability, no tampering and convenient tracing. The whole construction is divided into two stages: the first stage is outside the chain, mainly composed of an identity authentication module, a right management module and a supervision management module, and mainly responsible for verifying the user state, giving rewards to the user and supervising the user behavior; and the second stage is in a chain, mainly comprising industry standard library chains, wherein each industry standard library chain comprises a module which is responsible for storing and reading police service resource data information of the industry standard library chain. And the user is verified to be a registered user through the identity authentication module, and the registered user carries out interaction between the first stage and the second stage by calling the intelligent contract.
The police service resource data standard co-construction management algorithm and process based on the block chain are as follows:
the method comprises the following steps: the police resource data demander submits a registration application, and the identity of the police resource data demander is verified through the identity authentication module to obtain a corresponding return state. If the registration is successful, the user becomes a registered user, otherwise, the registration is failed.
Step two: the data demander has corresponding point information through the authority management module.
Step three: the data demander has corresponding supervision information through the supervision management module.
Step four: and the data demander calls the intelligent contract to carry out operations such as application, query, cloning and the like of the data standard.
Step five: and the police service resource data standard library chain automatically completes corresponding operation by means of an intelligent contract.
The data standardization needs to follow a certain standardization principle, and the standardization principle can improve the data quality to the maximum extent, ensure the standardization and form a data sharing mechanism. The police service resource data standard co-construction method based on the block chain unifies the rules of the data standard, unifies the data query interface, and can share data in real time. Through an incentive system of authority management, user viscosity is enhanced, the problem of data island is eliminated, and data standard interconnection, intercommunication and mutual trust are realized.
003 Smart contracts form a solid transparent business:
when police resource data are shared, the block chain guarantees the complete consistency of the police resource data of each node through the account book, and meanwhile, an executable code can be issued on the block chain. The method executes the solidified and transparent business logic in an intelligent contract mode, performs hard core control on data standards, operation flows and the like of various businesses, and effectively avoids business conflicts caused by problems of management modes among departments, rule change, system upgrade and the like.
The storage of the contract codes and the states by the block chain ensures the reliability and the availability of the contract storageObservability, the intelligent contract is code stored on the blockchain, the contract state is stored in the blockchain, the contract code is executed through the blockchain link points, the contract calculation result through the distributed consistency algorithm is stored in the blockchain, and the contract state is updated. The state transition of the blockchain can be given as shown in the formula:
wherein
A state transfer function for a block chain;
for block chains at time
The state of (1);
in order to police service, in a block chain system, services are collected and placed into blocks, each block is referred to by a hash value of the block, one block not only has a set of hash and transaction of the previous block, but also has a block chain state up to the block, and the hash of the previous block is placed into the block, so that the block is connected into a chain, wherein the specific expression is as follows:
the hash of the previous block is put into the block, so that the block is connected into a chain to form a nested function, wherein the specific expression is as follows:
the block chain stores all case services in a block, so that the following tracing query is facilitated, the latest state of the block chain is stored in an MPT (quick patricia trie), wherein the MPT is a combined abbreviation of a Merck tree and a Terrisian tree, is an improved data structure which integrates the advantages of the Merck tree and a prefix tree, is a very important data structure in an Ether, and is used for storing the state change (state tree) of the police service in the patent, instantly generating the latest state abstract, and further quickly finding out the required information according to a Key (state keyword).
Taking case-related police type and case-related detailed information of case management departments as examples, a block chain intelligent contract technology is introduced, the problems of consistency, timeliness and safety of the case-related police type and the case-related detailed information can be well solved, after all the police departments achieve consensus on business standards according to business requirements, shared intelligent contract codes are formed and issued to a 'block chain + police resource management' platform, different operations of all the departments on account data based on own data authorities are achieved through achieving the consensus intelligent contracts, and account data can be updated in real time through intelligent contracts such as network security police increasing, refreshing and importing the case information and inquiring case tables. Through the convention of the transaction rules, disputes caused by the problems of unclear rules and the like among departments are completely avoided, and the data of different departments are completely consistent under the block chain guarantee.
The 004 multi-partition user authorization mechanism guarantees privacy security:
police service resource data sharing of the block chain effectively solves the safety and privacy protection of data, and emphasizes the use right of a business policeman to the data in public security service.
The query keywords submitted by the data user meet two security requirements, namely the privacy of the query keywords is ensured, namely the query keywords of the data user cannot be delivered to the cloud server in a plaintext form; second, if the query keyword is unlinkable, assume that the data user
All the contained keys need to be retrieved from the encrypted inverted index
The data user utilizes the key by the following two steps
Encrypting the query key
And a query trapdoor is generated,
first, the data user
Randomly selecting an element
Calculating the following formula (
Is from a collection
Random numbers selected randomly and uniformly): to facilitate writing
Wherein the content of the first and second substances,
is two orders of prime number
The cyclic multiplication group of (a) is,
into a group
A generator of (2). Defining bilinear mappings
And two secure hash functions
Respectively hashing character strings of any length into groups
And group
An element of (1).
Randomly and uniformly slave to a group for a key distribution center
The two elements selected above are used to generate a key.
Secondly, for each
，
Data user
Computing
（1）
Wherein the content of the first and second substances,
in order to be a collection of attributes,
for the complete set of system attributes
Any one of the attributes of (a), (b), (c), (d) and (d) any one of (d), (d) and (d) any (d) and (d) an (d) an (d) an (d,
presentation group
One set of the above-mentioned (c) is,
is from a collection
Wherein the random number is randomly and uniformly selected,
，
is an attribute
A random attribute key is generated, and the random attribute key is generated,
。
data owner based on index key
Access rights requirement of, defining an access control tree
From
Starting from the root node of (1), in a top-down manner
Each node in
Constructing a polynomial
And is provided with
The number of the highest order term being the threshold for grounding
As little as 1, i.e.
. For root node
The data owner randomly selects a value
And is provided with
Data owner settings for any other node
。
When the data owner decides to revoke an attribute of the data consumer
He only needs to be an attribute
Generating a new attribute key
And use
With a full set of replacement keys
Sending out
To the cloud server. When the cloud server receives
Then, first use
With a full set of updated attribute keys
Then, for each encrypted inverted list
Which has access to a control tree of
If, if
Contains an attribute
Then the cloud server uses the attribute key
Updating
In (1)
Is composed of
After update
Can be expressed as:
suppose that
Leaf node in
Corresponding attribute is
That is to say
。
The cloud server has strong storage and calculation capacity, is used for storing encrypted outsourced data, is also used for inquiring on the encrypted security index according to the inquiry trapdoor submitted by the data user and returning an encrypted inquiry result to the data user, and when the cloud receives the data user
Query trapdoor
Then, an encrypted inverted list is given
The cloud server can return the inverted list only if the following two conditions are satisfied simultaneously
Index of all encrypted data files: firstly, the
With a list of inversions
Inquiry authority, II
If true; the whole safety inquiry process is divided into the following two sub-processes:
the first subprocess is that the cloud server traps the door according to the query
Determining data users
Whether or not there is a pair index
The inquiry authority is specifically as follows:
let
Is an access control tree
For each leaf node
Let a
Representing the attribute of the leaf node representation, i.e.
If, if
Then, calculate:
if it is not
Then define
；
The meaning of the character can be seen from the formulas (1) and (2).
For each non-leaf node
With a node threshold of
If there is one containing
An
Set of child nodes of
And for each child node
All satisfy
Then calculate
Wherein the content of the first and second substances,
is the lagrange coefficient; if no such collection exists, a collection of attributes is indicated to the data consumer
Unsatisfied node
Is then defined
；
For access control tree
Root node of
After the above recursion operation, if
Then, the attribute set of the data user is described
Unsatisfied access control trees
Otherwise
When the above first sub-process is completed, if
Then it means that the data consumer is not aligned to the keyword
The query authority of (1); otherwise, the cloud server continues to execute a second sub-process to determine whether the following equation holds:
wherein the content of the first and second substances,
the meanings are shown in formula (2)
If the equality is true, the query keyword is indicated
And encrypting the inverted index
Index key in (1)
Equal, then the cloud server returns the index
All encrypted data files in the file system; data consumer uses file decryption key granted by data owner
Decrypting the ciphertext; the correctness of the security query can be verified by the following derivation:
if the trapdoor
Query keyword in (1)
And
middle index key word
Are equal, i.e.
Then:
the main idea of inter-chain privacy protection is to perform a partitioned processing on the user's request. The physical network layers of all the partitions are common, so that a network interface layer needs to take the role of transaction shunting, when a client sends a transaction request to a node, a unique ID (NS _ ID) of a partition where the transaction is located needs to be attached, the interface layer forwards the transaction to an NSM through the NS _ ID in an analysis request and distributes the transaction by the NSM, the next figure shows the processing flow of the multi-partition transaction request, the client sends 3 transactions to the node, and after receiving the transaction request, the node needs to perform one-time transaction analysis on an RPC interface layer, reads the NS _ ID of the transaction, and forwards the transaction ID and the transaction itself to an NSM partition manager. Subsequently, the NSM distributes the transaction request to the processing modules of the corresponding partitions according to the given NS _ ID, thereby implementing the offloading processing of the transaction.
The flow of the multi-partition splitting process is shown in fig. 2.
Compared with the traditional transaction processing flow, the transaction processing flow with the common identification of the partitions has two more steps: the RPC interface layer analyzes the partition ID, and the partition manager NSM distributes the transaction according to the partition ID. After the NSM has shunted transactions, the processing logic inside the partition is consistent with the original solution. In the reconstruction process of the partition consensus scheme, each module in the system needs to be decoupled, so that the calling logic between the modules becomes clearer
The authorization of the user is obtained in a specific service scene, and the external organization can use the data of the user. In order to ensure the stable operation of the business process, the authorization of the user information realizes that the transactor provides uniform configuration management with business management, business data items, protocol management, protocol content management, authorization modes, electronic approval process management and the like. And according to the management requirement of the authorization service, the face recognition verification and the short message verification are docked to verify the real person authentication. And (4) based on different application scenes of the access authorized by the blockchain data, the natural person/legal person authorizes the relevant organization and allows the use of the relevant data of the authorized subject. It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The above embodiments are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modifications made on the basis of the technical scheme according to the technical idea of the present invention fall within the protection scope of the present invention. While the embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (6)
1. A police service resource data governance cooperative method based on a block chain is characterized in that: the method specifically comprises the following steps:
step 1, constructing a case data quality collaborative model based on a block chain: through governing model structure, method, flow and number
Introducing an anti-tampering technology according to sharing and access control, data updating and intelligent contracts to achieve a governing target based on the characteristics of a regional chain distributed account book, an encryption algorithm and a consensus mechanism;
step 2, establishing a multi-party cooperation standard: implementing complexities by establishing rule-based data and standardized intelligent contracts
Each record of the business logic industry standard library chain is orderly linked from the back to the front, and the method is safe and stable, cannot be tampered and can be traced;
step 3, the intelligent contract forms a solidified transparent service: performing solidified transparent business logic by means of intelligent contracts
Performing hard core control on data standards and operation flows of various services, and storing service data through intelligent cooperation, thereby effectively avoiding service conflicts caused by problems of management modes, rule changes, system upgrading and the like among departments;
step 4, the multi-partition user authorization mechanism guarantees privacy security: user information authorization for realizing transactor and business management and business
Unified configuration management is provided for service data items, protocol management, protocol content management, authorization modes, electronic approval process management, cloud storage encryption and the like;
and 5, finishing the cooperative treatment of the block chain data.
2. The cooperative police service resource data governance method based on the block chain as claimed in claim 1, wherein:
in step 1, a tamper-proof technique is cited, specifically as follows:
if an attacker tries to tamper the data of the h block before the latest block, the attacker needs to modify the hash value of the block and recalculate the hash values of all the blocks afterwards; setting the current computing power of the whole network honest nodes as hash value computation for p times per second, wherein the block hash value contains g prefix binary 0 under the current computing difficulty; an attacker is newly added computing power, and the computing power is calculated by q times of Hash values per second; if no new node participates, the probability that the honest node obtains a new block in each second is
The probability of an attacker obtaining a new block is
(ii) a Initial height difference between attacker and honest node
Is provided with
The height difference is the ith second, the height difference is
The probability of change per second is divided into 3 cases:
event(s)
: if the attacker does not generate a block, the honest node generates a block,
plus 1, probability
；
Event(s)
: if the attacker does not generate a block, the honest node generates a block,
minus 1, probability
；
Event(s)
: if the attacker does not generate a block, the honest node generates a block,
invariance, probability
；
The height difference per second
The variation probability distribution of (a) conforms to a plurality of distributions:
when in use
When the attacker successfully catches up with the honest nodes and distributes the block chains, the data is successfully tampered;
within t seconds, t height change events occur, and n is set as
The number of occurrences; when the tampering is successful, the user may,
at least take place
Let j be an event
The difference between the actual number of occurrences and the minimum number of occurrences, then
The actual number of occurrences is
；
The number of occurrences is based on the number of occurrences of the first two, and is
Wherein, in the step (A),
；
then within t seconds, the probability of the attacker pursuing honest nodes is:
3. The cooperative police service resource data governance method based on the block chain as claimed in claim 1, wherein:
the step 2 is divided into two stages:
the first stage is outside the chain, and consists of an identity authentication module, a right management module and a supervision management module, and is used for verifying the user state, giving rewards to the user and supervising the user behavior;
the second stage is in the chain, which is composed of industry standard library chains, wherein each industry standard library chain is used for storing and reading police service resource data information of the industry standard library chain; and the user is verified to be a registered user through the identity authentication module, and the registered user carries out interaction between the first stage and the second stage by calling the intelligent contract.
4. The cooperative police service resource data governance method based on the block chain as claimed in claim 3, wherein: the police service resource data standard co-construction management algorithm and process based on the block chain are as follows:
step 2.1, the police service resource data demander submits a registration application, and the identity of the police service resource data demander is verified through an identity authentication module to obtain a corresponding return state, wherein the police service resource data demander becomes a registered user if the registration is successful, and otherwise the police service resource data demander fails to register;
step 2.2, the data demander has corresponding integral information through the authority management module;
step 2.3, the data demander has corresponding supervision information through a supervision management module;
step 2.4, the data demander calls an intelligent contract to apply, inquire and clone the data standard;
and 2.5, automatically completing corresponding operation by the police service resource data standard library chain by means of an intelligent contract.
5. The cooperative police service resource data governance method based on the block chain as claimed in claim 1, wherein:
in step 3, the storage of the block chain on contract codes and states ensures the reliability and observability of contract storage, the intelligent contracts are codes stored on the block chain, the contract states are stored in the block chain, the contract codes are executed through block chain link points, the contract calculation results through a distributed consistency algorithm are stored in the block chain, and the contract states are updated; the state transition of the blockchain can be given as shown in the formula:
wherein the content of the first and second substances,
a state transfer function for a block chain;
is the state of the blockchain at time t; t is a police service;
the method comprises the following steps that services are collected and placed into blocks, each block is indicated by a hash value of the block, one block not only has a set of hash and transaction of the previous block, but also has a block chain state from the block, the hash of the previous block is placed into the block, and therefore the block is connected into a chain, and the specific expression is as follows:
the hash of the previous block is put into the block, so that the block is connected into a chain to form a nested function, wherein the specific expression is as follows:
the block chain stores all case services in a block, so that the following tracing query is facilitated, the latest state of the block chain is stored in an MPT, and the MPT is written as merkle patricia trie, wherein the MPT is a combined abbreviation of a Mercker tree and a Telejia tree, is an improved data structure which integrates the advantages of the two tree structures of the Mercker tree and the prefix tree, is a very important data structure in an Ether, and is used for storing a state change state tree of the police service, generating a latest state abstract in real time, and further quickly finding required information according to a state keyword Key.
6. The cooperative police service resource data governance method based on the block chain as claimed in claim 1, wherein:
in step 4, the query keyword submitted by the data user should meet two security requirements, one is the privacy of the query keyword, namely the query keyword of the data user cannot be delivered to the cloud server in a plaintext form; second, if the query keyword is unlinkable, assume that the data user
All the contained keys need to be retrieved from the encrypted inverted index
The data user utilizes the key by the following two steps
Encrypting the query key
And a query trapdoor is generated,
first, the data user
Randomly selecting an element
The following formula is calculated, where r is from the set
The random numbers are selected randomly and uniformly: to facilitate writing
Wherein the content of the first and second substances,
is two orders of prime number
The cyclic multiplication group of (a) is,
into a group
A generator of (2); defining bilinear mappings
And two secure hash functions
Respectively hashing character strings of any length into groups
And group
An element of (1);
randomly and uniformly slave to a group for a key distribution center
The two elements selected above are used for generating a secret key;
secondly, for each
，
Data user
Computing
；
（1）
Wherein, S is an attribute set,
for the complete set of system attributes
S represents a group
One set of the above-mentioned (c) is,
is from a collection
Wherein the random number is randomly and uniformly selected,
，
is an attribute
A random attribute key is generated, and the random attribute key is generated,
；
data owner based on index key
Access rights requirement of, defining an access control tree
From
From the root node ofIn the following way
Each node in
Constructing a polynomial
And is provided with
The number of the highest order term being the threshold for grounding
As little as 1, i.e.
(ii) a For the root node R, the data owner randomly selects a value
And is provided with
Data owner settings for any other node
；
When the data owner decides to revoke an attribute of the data consumer
He only needs to be an attribute
Generating a new attribute key
And use
With a full set of replacement keys
Sending out
Sending the data to a cloud server; when the cloud server receives
Then, first use
With a full set of updated attribute keys
Then, for each encrypted inverted list
Which has access to a control tree of
If, if
Contains an attribute
Then the cloud server uses the attribute key
Updating
In (1)
Is composed of
After update
Can be expressed as:
suppose that
Leaf node in
Corresponding attribute is
That is to say
；
The cloud server has strong storage and calculation capacity, is used for storing encrypted outsourced data, is also used for inquiring on the encrypted security index according to the inquiry trapdoor submitted by the data user and returning an encrypted inquiry result to the data user, and when the cloud receives the data user
Query trapdoor
After that, givenAn encrypted posting list
The cloud server can return the inverted list only if the following two conditions are satisfied simultaneously
Index of all encrypted data files: firstly, the
With a list of inversions
Inquiry authority, II
If true; the whole safety inquiry process is divided into the following two sub-processes:
the first subprocess is that the cloud server traps the door according to the query
Determining whether data user u has a pair index
The inquiry authority is specifically as follows:
let
Is an access control tree
For each leaf node
Let a
Representing the attribute of the leaf node representation, i.e.
If, if
Then, calculate:
if it is not
Then define
；
Wherein, the meaning of the characters can be known by formulas (1) and (2);
for each non-leaf node
With a node threshold of
If there is one containing
An
Set of child nodes of
And for each child node
All satisfy
Then calculate
Wherein the content of the first and second substances,
is the lagrange coefficient; if no such collection exists, a collection of attributes is indicated to the data consumer
Unsatisfied node
Is then defined
；
For access control tree
Root node of
After the above recursion operation, if
Then, the attribute set of the data user is described
Unsatisfied access control trees
Otherwise
When the above first sub-process is completed, if
Then it means that the data consumer is not aligned to the keyword
The query authority of (1); otherwise, the cloud server continues to execute a second sub-process to determine whether the following equation holds:
wherein the content of the first and second substances,
，
the meanings are shown in formula (2)
If the equality is true, the query keyword is indicated
And encrypting the inverted index
Index key in (1)
Equal, then the cloud server returns the index
All encrypted data files in the file system; data consumer uses file decryption key granted by data owner
Decrypting the ciphertext; the correctness of the security query can be verified by the following derivation:
if the trapdoor
Query keyword in (1)
And
the middle index key w is equal, i.e.
Then:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111085205.0A CN113554421A (en) | 2021-09-14 | 2021-09-14 | Police affair resource data governance cooperation method based on block chain |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111085205.0A CN113554421A (en) | 2021-09-14 | 2021-09-14 | Police affair resource data governance cooperation method based on block chain |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113554421A true CN113554421A (en) | 2021-10-26 |
Family
ID=78134624
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111085205.0A Pending CN113554421A (en) | 2021-09-14 | 2021-09-14 | Police affair resource data governance cooperation method based on block chain |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113554421A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114142996A (en) * | 2021-11-18 | 2022-03-04 | 贵州大学 | Searchable encryption method based on SM9 cryptographic algorithm |
| CN117033738A (en) * | 2023-10-07 | 2023-11-10 | 广东省信息工程有限公司 | Digital file management method and system based on blockchain |
| CN117874826A (en) * | 2024-03-11 | 2024-04-12 | 成都数据集团股份有限公司 | Database authority management system and method |
| CN117874826B (en) * | 2024-03-11 | 2024-05-24 | 成都数据集团股份有限公司 | Database authority management system and method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113127652A (en) * | 2020-01-15 | 2021-07-16 | 腾讯科技（北京）有限公司 | Abstract acquisition method, device and computer readable storage medium |
| CN113129038A (en) * | 2021-06-21 | 2021-07-16 | 浙江数秦科技有限公司 | Green food evaluation system based on block chain |
| CN113177670A (en) * | 2021-05-27 | 2021-07-27 | 腾讯科技（深圳）有限公司 | Data processing method, device, equipment and readable storage medium |
-
2021
- 2021-09-14 CN CN202111085205.0A patent/CN113554421A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113127652A (en) * | 2020-01-15 | 2021-07-16 | 腾讯科技（北京）有限公司 | Abstract acquisition method, device and computer readable storage medium |
| CN113177670A (en) * | 2021-05-27 | 2021-07-27 | 腾讯科技（深圳）有限公司 | Data processing method, device, equipment and readable storage medium |
| CN113129038A (en) * | 2021-06-21 | 2021-07-16 | 浙江数秦科技有限公司 | Green food evaluation system based on block chain |
Non-Patent Citations (5)
| Title |
|---|
| 宋俊典等: "基于区块链的数据治理协同方法", 《计算机应用》 * |
| 尹辉: "云计算环境下隐私保护的安全查询技术研究", 《中国博士学位论文全文数据库》 * |
| 盛念祖等: "基于区块链智能合约的物联网数据资产化方法", 《浙江大学学报（工学版）》 * |
| 顾颖等: "基于区块链的新型政务业务协同模式研究", 《江苏科技信息》 * |
| 黄洁华等: "众筹区块链上的智能合约设计", 《信息安全研究》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114142996A (en) * | 2021-11-18 | 2022-03-04 | 贵州大学 | Searchable encryption method based on SM9 cryptographic algorithm |
| CN114142996B (en) * | 2021-11-18 | 2023-09-05 | 贵州大学 | Searchable encryption method based on SM9 cryptographic algorithm |
| CN117033738A (en) * | 2023-10-07 | 2023-11-10 | 广东省信息工程有限公司 | Digital file management method and system based on blockchain |
| CN117033738B (en) * | 2023-10-07 | 2023-12-08 | 广东省信息工程有限公司 | Digital file management method and system based on blockchain |
| CN117874826A (en) * | 2024-03-11 | 2024-04-12 | 成都数据集团股份有限公司 | Database authority management system and method |
| CN117874826B (en) * | 2024-03-11 | 2024-05-24 | 成都数据集团股份有限公司 | Database authority management system and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP4120114A1 (en) | Data processing method and apparatus, smart device and storage medium | |
| CN108833081B (en) | Block chain-based equipment networking authentication method | |
| CN109040271B (en) | Network equipment integrity protection method under distributed environment | |
| US11410145B2 (en) | Blockchain-implemented method for control and distribution of digital content | |
| CN109314636B (en) | Cryptographic method and system for secure extraction of data from blockchains | |
| JP2021512569A (en) | Blockchain data processing method, management side, client side, converter and medium | |
| Ali et al. | Blockchain and the future of the internet: A comprehensive review | |
| ul Hassan et al. | Blockchain and the future of the internet: a comprehensive review | |
| CN113312574A (en) | Cloud data integrity auditing method based on block chain | |
| CN113554421A (en) | Police affair resource data governance cooperation method based on block chain | |
| WO2023082690A1 (en) | Matrix consortium blockchain based sponsoring method capable of concealing real name | |
| CN109428892A (en) | Multistage rewritable block chain | |
| CN115049398A (en) | Complete data asset trusted management and value transfer system and method | |
| CN114285867B (en) | Air-railway combined transport data sharing system based on alliance chain and attribute encryption | |
| El Defrawy et al. | Founding digital currency on secure computation | |
| CN114900290A (en) | Data transaction model and privacy protection method based on block chain | |
| CN112801778A (en) | Federated bad asset blockchain | |
| CN115270145A (en) | User electricity stealing behavior detection method and system based on alliance chain and federal learning | |
| Yang et al. | A blockchain-based keyword search scheme with dual authorization for electronic health record sharing | |
| Jiang et al. | Research on the application of blockchain in copyright protection | |
| Xie et al. | A novel blockchain-based and proxy-oriented public audit scheme for low performance terminal devices | |
| Gao et al. | BFR-SE: a blockchain-based fair and reliable searchable encryption scheme for IoT with fine-grained access control in cloud environment | |
| TWM586416U (en) | Implementing a multi-center, distributed verification system for transactions based on blockchain technology | |
| CN117043772A (en) | Block chain data separation | |
| Xiao et al. | A collaborative auditing scheme with dynamic data updates based on blockchain |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20211026 |
|
| RJ01 | Rejection of invention patent application after publication |