CN108681898A - A kind of data trade method and system based on block chain - Google Patents
A kind of data trade method and system based on block chain Download PDFInfo
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Abstract
This application discloses a kind of data trade methods based on block chain, solves the defect of centralised storage using the decentralization characteristic of block chain, each user is a node in block chain network, by the way that intelligent Trade contract is deployed to block chain network, to establish the data trade channel between data generation side and data purchase, select carrying cost relatively low in terms of data storage, the higher distributed storage network of security performance, by can transaction data stored with ciphertext form and generate the minimum data directory of data volume to position corresponding ciphertext, it is different from and directly preserves data to block chain network, data carrying cost can effectively be reduced.Meanwhile block chain network can preserve All Activity record, and all nodes are synchronized to, the possibility being tampered greatly is avoided, but also All Activity record is open, transparent.The application further simultaneously discloses a kind of data transacting system based on block chain, has above-mentioned advantageous effect.
Description
Technical field
This application involves block chain technical field, more particularly to a kind of data trade method and system based on block chain.
Background technology
Under the big data epoch, no matter immeasurable value, therefore data are suffered from for personal or enterprise, data
Trading industry is applied and is given birth to.Individual also can be endlessly generated while user is using service (application) quotient's service provided
Data, these data have high commercial value.
The trading right of this partial data ought to can be obtained as the data generation side for generating these personal data, and in reality
In the situation of border, since service provider is using innate advantage caused by centralization data storage method, energy is easily obtained
Enough permissions that this part personal data is handled by personal inclination, and user then loses the collection and processing to personal data
Ability causes service provider now and has monopolized the personal data that these users are generated in using these service processes, and
The phenomenon that may privately being speculated for itself with these data.And user is then not only unable to rely on this part personal data
Transaction is oneself to bring deserved income, it is also necessary to which it is the security risk that users personal data is brought to bear enterprise's self-dealing.
Therefore, the data trade mode under pattern is inequitable for the user of data generation side now.
Therefore, how to overcome existing underground, opaque, the inequitable defect of available data transaction, provide one kind more
Add disclosure, more transparent, more fair, and service provider and user can participate in the data trade of the process of exchange of data
Mechanism is those skilled in the art's technical problem urgently to be resolved hurrily.
Invention content
The purpose of the application is to provide a kind of data trade method based on block chain, special using the decentralization of block chain
Property solves the defect of centralised storage, and each user is a node in block chain network, by closing intelligent Trade
It is about deployed to block chain network, to establish the data trade channel between data generation side and data purchaser, data storage side
Face selects that carrying cost is relatively low, the higher distributed storage network of security performance, can transaction data stored simultaneously with ciphertext form
The minimum data directory of data volume is generated to position corresponding ciphertext, is different from and directly preserves data to block chain network,
Data carrying cost can effectively be reduced.Meanwhile block chain network can preserve All Activity record, and it is synchronized to all nodes, pole
Big avoids the possibility being tampered, but also All Activity record is open, transparent.
The another object of the application is the provision of a kind of data transacting system based on block chain.
To achieve the above object, the application provides a kind of data trade method based on block chain, including：
Using issue terminal generate with the corresponding intelligent Trade contract of application issued, and by intelligent Trade contract portion
It affixes one's name to block chain network；Wherein, there are the transaction channels between data trade demand both sides for establishing for the intelligent Trade contract；
First data terminal to it is described apply generate in use can transaction data classify, and using it is various types of can
Data description table is established in the address of the description information of transaction data and corresponding intelligent Trade contract；
First data terminal using unique key to generated in each predetermined period can transaction data be encrypted, and
Obtained ciphertext is stored to distributed storage network；
The distributed storage network is to be stored in the ciphertext of itself to generate corresponding data directory；
Second data terminal corresponds to intelligence by checking that the description information in the data description table obtains targeted species data
Can merchandise the address of contract, and the intelligent Trade contract under described address is called to initiate the target species to the block chain network
The transaction request of class data；
When first data terminal receives and agrees to the transaction request, by the intelligent Trade contract to institute
It states the second data terminal and returns to the corresponding data directory of the targeted species data and decruption key, while receiving the transaction and asking
The transaction data for including in asking；
Second data terminal is according to the data directory and decruption key received in the distributed storage network
It finds corresponding ciphertext and decrypts that obtain can read raw data；Wherein, each terminal is the composition section in the block chain network
Point.
Optionally, first data terminal can transaction data progress to what is generated in each predetermined period using unique key
Encryption, including：
First data terminal obtains the period start time of the identity identification information and each predetermined period of itself；
By the identity identification information and the period start time by rivest, shamir, adelman generate with it is each described pre-
If period uniquely corresponding public key and private key；
First data terminal utilize in each predetermined period uniquely corresponding predetermined period of corresponding public key encryption
What is generated can transaction data.
Optionally, in first data terminal using uniquely corresponding public key encryption is corresponding pre- with each predetermined period
If what is generated in the period can further include after transaction data：
Key is established in first data terminal and preserves queue, and preserves the pairs of preservation of queue using the key
Each pair of public key and private key.
Optionally, the intelligent Trade contract in the case where calling described address initiates the targeted species to the block chain network
Before the transaction request of data, further include：
Public key from second data terminal to all node broadcasts oneself in the block chain network so that institute
State the first data terminal using second data terminal public key encryption described in the corresponding data directory of targeted species data and
Decruption key.
Optionally, which further includes：
It is the application issue terminal of the publication application and the generation targeted species number in the intelligent Trade contract
According to the first data terminal different transaction data be set be divided into ratio.
Optionally, which further includes：
The block chain network record is deployed in all calling, the use information of the intelligent Trade contract of itself.
To achieve the above object, present invention also provides a kind of data transacting system based on block chain, the data trades
System includes：
Using issue terminal, the corresponding intelligent Trade contract of application for generating with issuing, and by the intelligent Trade
Contract is deployed to block chain network；Wherein, there are the friendships between data trade demand both sides for establishing for the intelligent Trade contract
Easy channel；
First data terminal, for it is described apply generate in use can transaction data classify, and using each
Type can the description information of transaction data and the address of corresponding intelligent Trade contract establish data description table；Utilize unique key pair
Generate in each predetermined period can transaction data be encrypted, and obtained ciphertext is stored to distributed storage network；When connecing
When receiving and agreeing to the transaction request, the target species are returned to first data terminal by the intelligent Trade contract
The corresponding data directory of class data and decruption key, while receiving the transaction data for including in the transaction request；
The distributed storage network, for generating corresponding data directory to be stored in the ciphertext of itself；
Second data terminal, for by checking that the description information in the data description table obtains targeted species data pair
The address of intelligent Trade contract is answered, and the intelligent Trade contract under described address is called to initiate the mesh to the block chain network
Mark the transaction request of type data；It is found in the distributed storage network according to the data directory and decruption key received
Corresponding ciphertext and decryption obtain can read raw data；
Wherein, each terminal is the composition node in the block chain network.
Optionally, first data terminal is specially the identity identification information for obtaining itself and each predetermined period
Period start time；The identity identification information and the period start time are generated and each institute by rivest, shamir, adelman
State predetermined period uniquely corresponding public key and private key；Using uniquely corresponding public key encryption is corresponding default with each predetermined period
Generate in period can transaction data data terminal.
Optionally, first data terminal is additionally operable to：It establishes key and preserves queue, and queue is preserved using the key
Each pair of public key of pairs of preservation and private key.
Optionally, second data terminal is additionally operable to：Certainly to all node broadcasts in the block chain network
Oneself public key, so that targeted species data pair described in public key encryption of first data terminal using second data terminal
The data directory and decruption key answered.
Obviously, the data trade method provided herein based on block chain, utilizes the decentralization characteristic of block chain
Solves the defect of centralised storage, each user is a node in block chain network, by by intelligent Trade contract
It is deployed to block chain network, to establish the data trade channel between data generation side and data purchaser, in terms of data storage
Select that carrying cost is relatively low, the higher distributed storage network of security performance, can transaction data store and give birth to ciphertext form
At the minimum data directory of data volume to position corresponding ciphertext, it is different from and directly preserves data to block chain network, it can
Effectively reduce data carrying cost.Meanwhile block chain network can preserve All Activity record, and all nodes are synchronized to, greatly
Avoid the possibility being tampered, but also All Activity record is open, transparent.The application additionally provides a kind of base simultaneously
In the data transacting system of block chain, there is above-mentioned advantageous effect, details are not described herein.
Description of the drawings
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of application for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is a kind of flow chart of data trade method based on block chain provided herein；
Fig. 2 can transaction data and positioning for a kind of encryption in the data trade method provided herein based on block chain
The flow chart of the method for data purchaser；
Fig. 3 is a kind of structure diagram of data transacting system based on block chain provided herein；
Fig. 4 logics between a kind of each executive agent in the data transacting system provided herein based on block chain are moved towards
Schematic diagram.
Specific implementation mode
The core of the application is to provide a kind of data trade method and system based on block chain, using in the going of block chain
Heart characteristic solves the defect of centralised storage, and each user is a node in block chain network, by will be intelligent
Transaction contract is deployed to block chain network, to establish the data trade channel between data generation side and data purchaser, data
Select that carrying cost is relatively low, the higher distributed storage network of security performance in terms of storage, can transaction data with ciphertext form
It stores and generates the minimum data directory of data volume to position corresponding ciphertext, be different from and directly preserve data to block chain
Network can effectively reduce data carrying cost.Meanwhile block chain network can preserve All Activity and record and be synchronized to all sections
Point greatly avoids the possibility being tampered, but also All Activity record is open, transparent.
To keep the purpose, technical scheme and advantage of the embodiment of the present application clearer, below in conjunction with the embodiment of the present application
In attached drawing, technical solutions in the embodiments of the present application is clearly and completely described, it is clear that described embodiment is
Some embodiments of the present application, instead of all the embodiments.Based on the embodiment in the application, those of ordinary skill in the art
The all other embodiment obtained without making creative work, shall fall in the protection scope of this application.
Below in conjunction with Fig. 1, Fig. 1 is a kind of flow chart of data trade method based on block chain provided herein.
It specifically includes following steps：
S101：Using issue terminal generate with the corresponding intelligent Trade contract of application issued, and by intelligent Trade contract
It is deployed to block chain network；
In the prior art, application provider only issues the application (APP) oneself developed to the public, and user can only use these
Using as during using these applications, if produce some personal data or produce which kind of personal data
Usually opaque to user, and to know perfectly clear for the application provider for developing this application, also have
Channel obtains these data, or even sells and make profit privately.
The application is to solve the problems, such as that this is opaque, while application provider's development and application, makes it while providing one
Part for trade user generated in using the application process can transaction data intelligent Trade contract, and by the intelligent Trade
Contract is deployed to block chain network, to by the intelligent Trade contract there are establish one between the both sides of data trade demand
Trading channel avoids the occurrence of the phenomenon that application provider carries out personal data transaction privately under traditional approach.
It should be noted that application issue terminal described herein is application provider's publication application and intelligent Trade
Corresponding data terminal when contract can be a mobile phone, a high-performance server etc..Application publication at this time
Terminal as a node in block chain network, is collectively constituted with subsequent first data terminal, the second data terminal
The block chain network, and it is exactly that the intelligent Trade contract is deployed to institute that it is practical, which to be deployed to block chain network, for intelligent Trade contract
There is node so that any node can be based on identical intelligent Trade contract and complete transaction.
For block chain technology as a kind of distributed security memory technology of novel decentralization, essence is one shared
Distributed data base, the database by block chain network entirety participant jointly record and verification, sequentially in time will hand over
Easy information generation area block, and a kind of linked data structure is formed in such a way that sequence is connected, ensure data in the way of cryptography
It can not distort and can not forge, therefore it is with high security and high reliability.
On this basis, the data access control of transparence can be realized with integrated intelligent contract, intelligent contract is one
Transparence program code under a computer network for operating in decentralization is the contract realized by code, the contract pair
All nodes in network after contract generation as it can be seen that and be difficult to tamper with.Constitute the code of intelligent contract and conventional functionality
Code is simultaneously no different place, also can go to execute specific function according to the code logic rule write in advance, be conducive to calculate, modification,
The operations such as encryption.And intelligent contract is not merely a computer program that can be executed automatically, it is more like system
Participant, its absolute confidence, absolute neutrality, it is responsible for protecting your assets temporarily, and in strict accordance with the measured rule of prior quotient
It then goes to execute operation so that whole system can all be run according to preset program, and simultaneously by constituting block chain network
All nodes are witnessed, no matter who all can not prevent and interfere.
Intelligent Trade contract described herein is one kind of intelligent contract, that is, is mainly used for merchandising, and just looks like one
Absolute neutrality, just third party executing agency, are used to help data generation side and data purchaser realizes data trade, and protect
Card can receive desired personal data, data generation Fang Ze in data purchaser while paying certain purchase cost
The purchase cost that its payment can be received while having sent the personal data that data purchaser wants, just looks like Alipay phase
For the status of buyer and seller.
Certainly, it is really to establish the data trade channel between data generation side and data purchaser, and realize data trade,
Also need to many other parameters, for example, it is various types of can the description information of transaction data, identity information etc. the parameter of each side,
The description to intelligent contract largely having disclosed can be used for reference in this respect.
S102：First data terminal correspond to generate in use can transaction data classify, and utilization it is various types of
Can the description information of transaction data and the address of corresponding intelligent Trade contract establish data description table；
To realize the data trade purpose of intelligent Trade contract, it is also necessary to allow data purchaser can be in of all generations
Determined in personal data which be oneself desired data in addition which data be only the data side of generationing (user) be ready sale etc.
Deng, thus this be intended to suddenly by generate it is all can transaction data classify, with merger obtain it is various types of can transaction data
And according to the standard of classification obtain it is various types of can transaction data description information, and using the description information and being deployed in area
Data description table is established in the address of corresponding intelligent Trade contract in block chain network.
The data description table be mainly used for by data purchaser according to comprising description information determine which be its want purchase
Buy can transaction data, and the address of corresponding intelligent Trade contract is obtained, so as to from the corresponding intelligence of the address down
Can merchandise contract.
It is issued eventually through application using application provider it should be noted that the first data terminal described in this step is corresponded to
The user of the application of publication, i.e. a node in the corresponding data terminal in data generation side and block chain network are held, each
The smart mobile phone that user uses can also become a node.
1 data description table example of table
Upper table 1 is the application so that mail class is applied as an example, the description of a kind of specific implementation provided, the i.e. data
Include in table：Service ID (with application provider publication application correspond), intelligent Trade contract address, can transaction data kind
Class identifier list【K1, k2, k3 ..., kn】, the data specifying-information of corresponding each type【D1, d2, d3 ..., dn】Sum number
According to trading rules【R1, r2, r3 ..., rn】.Wherein, the form of expression of data trade rule is varied, due to the object of transaction
It is personal data, then number is set according to the difference of user, the difference of data type, period difference of data generation etc. mode
It according to trading rules, herein and is not specifically limited, visual concrete condition is flexibly formulated.
S103：First data terminal using unique key to generated in each predetermined period can transaction data be encrypted,
And obtained ciphertext is stored to distributed storage network；
Data generation side using apply during, this application can by generation can transaction data using unique key into
Row encryption, and obtained ciphertext is sent in distributed storage network and is preserved.Under normal conditions, the operation of this step can
Be that loop cycle executes at the same time, i.e., by the period by generate in the period it is all can transaction data added
It is close.Specifically, 1 day, 3 days or other suitable times that the time interval in each period can be set, do not do specific herein
It limits, visual actual conditions are adjusted flexibly.
The effect of unique key be by generate can transaction data ownership firmly be held in be subordinate to data generate
In the user hand of side, unless giving corresponding decruption key after the user agrees to or authorizes, other people can not be by ciphertext to reduction
Return readable initial data.To realize this purpose, which should be uniquely corresponding with the user, in other words the unique key
It is what the unique identifying information based on the user generated.Specifically, mutually passing same user's between excluding different data purchaser
When the possibility of decruption key, can use identical unique key encrypt generate in each period can transaction data, if cannot
When ruled it out, the unique key of transformation can also be generated with periodic transformation, can flexibly be selected.
Traditional storage system stores all data using the storage server concentrated, and storage server becomes system performance
Bottleneck, the needs of Mass storage application cannot be met, thus occur using expansible system structure, deposited using more
Storage server is shared storage load, is positioned the distributed storage network of storage information using location server, is not only increased and is
Reliability, availability and the access efficiency of system, are also easy to extend.Specifically, there are many selections for distributed storage network, such as
DHT (Distributed Hash Table, distributed hashtable) stores network, is a kind of distributed storage method, is being not required to
In the case of wanting server, each client is responsible for a small-scale routing, and is responsible for storage sub-fraction data, to real
The now addressing and storage of entire DHT storages network；IPFS (InterPlanetary File System, interspace file system) is
One is intended to create lasting and distributed storage and shared file the network transmission protocol, which is a kind of content addressable
Reciprocity hypermedia distribution protocol, the storage network obtained based on the technology can also realize that data identical with DHT storage networks are deposited
Store up purpose.
It is emphasized that the application can be produced by being respectively under the jurisdiction of the first data terminal used by a user of data generation side
Raw all personal data are first generated and saved in the local of each first data terminal, and as needed in real time or by predetermined period
The personal data of generation are encrypted, ciphertext, which is finally uploaded to distributed storage network, completes storage, rather than such as traditional mould
The centralized servers that can be directly provided this part data opaque to user by application provider with plaintext version under formula
Middle acquisition simultaneously is completed to store, even if nothing if application provider obtains ciphertext from the third party for providing distributed storage network
Using only decryption is completed by the key that user grasps, the user for thus generating this part personal data can realize to this portion method
The complete management and control of divided data, rather than it is limited by application provider in the case of underground, opaque.
S104：Distributed storage network is to be stored in the ciphertext of itself to generate corresponding data directory；
It is a kind of relatively conventional to obtain the data rope since the data directory of generation is uniquely obtained based on corresponding ciphertext
The mode drawn be using hash algorithm be calculated with the unique corresponding summary info (condition code) of ciphertext, including a variety of belong to Kazakhstan
The specific algorithm of uncommon algorithm, those skilled in the art can obtain a variety of specific implementations based on this mode, and details are not described herein.
S105：Second data terminal obtains targeted species data by the description information checked in data description table and corresponds to intelligence
Can merchandise the address of contract, and the intelligent Trade contract under call address initiates the transaction of targeted species data to block chain network
Request；
When data purchaser determines targeted species data according to the description information for including in data description table, also with
The address of the intelligent Trade contract corresponding with the targeted species data recorded in data description table, to be used from the address down
Corresponding intelligent Trade contract initiates the transaction request of the targeted species data to block chain network.
It should also be noted that, second data terminal pair corresponding with the first data terminal that data generation side uses
Data purchaser is answered, therefore data purchaser can be by the data terminal of oneself by checking that open data description table obtains
It is various types of can transaction data description information and corresponding intelligent Trade contract address, and from the address down with corresponding
Intelligent Trade contract.
When intelligent Trade contract initiates transaction request to block chain network, intelligent Trade contract can also be according to relevant information
Determine that who is corresponding data generation side, correspondingly, can also can also be completed when the transaction request is agreed to by data generation side
Data directory and decruption key that data generation side provides are handed to the operation of data purchaser.
Data directory and decruption key to prevent from handing to data purchaser are intercepted or are obtained by unknown means by other people
When can not also be obtained from distributed storage network can read raw data, it is also necessary to the use of data generation side and data purchaser
Data directory and decruption key is encrypted in unique corresponding encryption key, so that only real data purchaser can make
With only decryption is completed by the decruption key oneself preserved, to obtain the data directory and decruption key that data generation side provides.
Therefore, a kind of method for the encryption key for making data generation side obtain data purchaser is：Data buy direction area
All node broadcasts encryption key of its own in block chain network.
S106：When the first data terminal receives and agrees to transaction request, by intelligent Trade contract to the second data
Terminal returns to the corresponding data directory of targeted species data and decruption key, while receiving the number of deals for including in transaction request
According to；
Transaction data described in this step can simply be interpreted as realizing what this transaction data purchaser was paid
Cost, specific manifestation form is varied, can be monetary data, can also be the document data etc. of certain exchanges.
Further, can also be in intelligent Trade contract for the contribution made in the process using provider
It is also provided with portion using provider and is divided into ratio, is i.e. the purchase cost of data purchaser payment is generated by application provider and data
Side receives interests simultaneously, so as to bring better usage experience and not under the excitation of such mechanism for user using provider
Disconnected to promote itself competitiveness of product in market, the ratio of being specifically divided into can be negotiated really by data generation side and application provider
It is fixed, herein and it is not specifically limited.
S107：Second data terminal is found according to the data directory and decruption key that receive in distributed storage network
Corresponding ciphertext and decryption obtain can read raw data.
Based on the above-mentioned technical proposal, a kind of data trade method based on block chain provided in this embodiment, utilizes block
The decentralization characteristic of chain solves the defect of centralised storage, and each user is a node in block chain network, leads to
It crosses and intelligent Trade contract is deployed to block chain network, it is logical to establish the data trade between data generation side and data purchaser
Road, selects that carrying cost is relatively low, the higher distributed storage network of security performance in terms of data storages, can transaction data with close
Literary form stores and generates the minimum data directory of data volume to position corresponding ciphertext, be different from directly by data preserve to
Block chain network can effectively reduce data carrying cost.Meanwhile block chain network can preserve All Activity record, and be synchronized to
All nodes greatly avoid the possibility being tampered, but also All Activity record is open, transparent.
Below in conjunction with Fig. 2, Fig. 2 can hand over for a kind of encryption in the data trade method provided herein based on block chain
The flow chart of easy data and the method for location data purchaser.
S201：First data terminal obtains the period start time of the identity identification information and each predetermined period of itself；
S202：Identity identification information and period start time are generated with each predetermined period only by rivest, shamir, adelman
One corresponding public key and private key；
S203：First data terminal is utilized to be generated in each predetermined period uniquely corresponding predetermined period of corresponding public key encryption
Can transaction data；
The present embodiment S201, S202 and S203 give a kind of unique key generation for generating and being converted with periodic transformation
Method, i.e., using the identity identification information of changeless data generation side and each period start time converted at any time, one
Play the dynamic public key and private key converted using rivest, shamir, adelman.
Wherein, rivest, shamir, adelman is to refer to obtain the algorithm of a pair of different key based on some information, this
A pair of different key is commonly known as public key and private key according to the difference of usage, it should be noted that uses public key
Encrypted content can only use while the private key generated could be decrypted, identical, can only also be used using the content of private key encryption
The public key generated simultaneously could be decrypted, and public key can usually obtain easily, and private key is usual only by holding in one's own possession, therefore using public
The encrypted file of key, can only the user could complete to decrypt using the only private key oneself held, also just will firmly count in this way
According to control in the hand of oneself.
S204：Key is established in the first data terminal and preserves queue, and every using the pairs of preservation of key preservation queue
To public key and private key；
As a result of different cycles using the public key of transformation be encrypted can transaction data mode, generate private key every time
It is also required to be preserved, so that correct private key is subsequently fed back to data purchaser.This step provides a kind of close by establishing
Key preserves queue to preserve the mode of the private key generated every time, and the generation and the size of time due to each pair of unsymmetrical key are at just
Than the unsymmetrical key in the queue should also be arranged according to the sequencing of generation.
S205：Obtained ciphertext is stored to distributed storage network, and distributed storage network is to be stored in itself
Ciphertext generates corresponding data directory；
S206：Public key from second data terminal to all node broadcasts oneself in block chain network so that first
Data terminal utilizes the corresponding data directory of public key encryption targeted species data and decruption key of the second data terminal.
On the basis of a upper embodiment, this gives a kind of unique keys for generating and being converted with periodic transformation
Generation method can eliminate the hidden danger that same user's decruption key is mutually passed between different data purchaser, also be protected by establishing key
The mode for depositing queue finally uses broadcast to the good preservation of multipair unsymmetrical key progress of generation subsequently to find
Mode inform the public key of data purchaser, ensure that only real data purchaser can use and only preserved by oneself
Decruption key completes decryption.
Because situation is complicated, it can not enumerate and be illustrated, those skilled in the art should be able to recognize according to the application
The basic skills principle combination actual conditions of offer may exist many examples, in the case where not paying enough creative works,
It should within the scope of protection of this application.
Below in conjunction with Fig. 3, Fig. 3 is a kind of structural frames of data transacting system based on block chain provided herein
Figure, specifically, the data transacting system may include：
Using issue terminal 100, the corresponding intelligent Trade contract of application for generating with issuing, and intelligent Trade is closed
About it is deployed to block chain network；Wherein, there are the transaction channels between data trade demand both sides for establishing for intelligent Trade contract；
First data terminal 200, for it is corresponding with generate in use can transaction data classify, and utilization is various
Class can the description information of transaction data and the address of corresponding intelligent Trade contract establish data description table；Using unique key to each
Generate in predetermined period can transaction data be encrypted, and obtained ciphertext is stored to distributed storage network；Work as reception
To and when agreeing to transaction request, the corresponding data rope of targeted species data is returned to the first data terminal by intelligent Trade contract
Draw and decruption key, while receiving the transaction data for including in transaction request；
Distributed storage network 300, for generating corresponding data directory to be stored in the ciphertext of itself；
Second data terminal 400 obtains targeted species data pair for the description information by checking in data description table
The address of intelligent Trade contract is answered, and the intelligent Trade contract under call address initiates targeted species data to block chain network
Transaction request；Corresponding ciphertext is found in distributed storage network according to the data directory and decruption key that receive and is decrypted
Obtaining can read raw data；Wherein, each terminal is the composition node in block chain network.
Wherein, the first data terminal can be specially to obtain the identity identification information of itself and from the period of each predetermined period
Begin the time；Identity identification information and period start time is uniquely corresponding with each predetermined period by rivest, shamir, adelman generation
Public key and private key；Using with generated in each predetermined period uniquely corresponding predetermined period of corresponding public key encryption can transaction data
Data terminal.
Further, the first data terminal can be also used for：Establish key preserve queue, and using key preserve queue at
To each pair of public key of preservation and private key；
Second data terminal can be also used for：To the public key of all node broadcasts oneself in block chain network, with
The first data terminal is set to utilize the corresponding data directory of public key encryption targeted species data and decruption key of the second data terminal.
Further, the application can also be issued in the intelligent Trade contract applies issue terminal and production
First data terminal of the raw targeted species data is arranged different transaction data and is divided into ratio；
The block chain network record is deployed in all calling, the use information of the intelligent Trade contract of itself.
Fig. 4 logics between a kind of each executive agent in the data transacting system provided herein based on block chain are moved towards
Schematic diagram.
Each embodiment is described by the way of progressive in specification, the highlights of each of the examples are with other realities
Apply the difference of example, just to refer each other for identical similar portion between each embodiment.For device disclosed in embodiment
Speech, since it is corresponded to the methods disclosed in the examples, so description is fairly simple, related place is referring to method part illustration
.
Professional further appreciates that, unit described in conjunction with the examples disclosed in the embodiments of the present disclosure
And algorithm steps, can be realized with electronic hardware, computer software, or a combination of the two, in order to clearly demonstrate hardware and
The interchangeability of software generally describes each exemplary composition and step according to function in the above description.These
Function is implemented in hardware or software actually, depends on the specific application and design constraint of technical solution.Profession
Technical staff can use different methods to achieve the described function each specific application, but this realization is not answered
Think to exceed scope of the present application.
Specific examples are used herein to illustrate the principle and implementation manner of the present application, and above example is said
It is bright to be merely used to help understand the present processes and its core concept.For those skilled in the art,
Under the premise of not departing from the application principle, can also to the application, some improvement and modification can also be carried out, these improvement and modification
It falls into the application scope of the claims.
It should also be noted that, in the present specification, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only that
A little elements, but also include the other elements being not explicitly listed, or further include for this process, method, article or
The intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...", is not arranged
Except there is also other identical elements in the process, method, article or equipment including element.
Claims (10)
1. a kind of data trade method based on block chain, which is characterized in that including：
Intelligent Trade contract corresponding with the application of publication is generated using issue terminal, and the intelligent Trade contract is deployed to
Block chain network；Wherein, there are the transaction channels between data trade demand both sides for establishing for the intelligent Trade contract；
First data terminal to it is described apply generate in use can transaction data classify, and merchandised using various types of
Data description table is established in the address of the description information of data and corresponding intelligent Trade contract；
First data terminal using unique key to generated in each predetermined period can transaction data be encrypted, and will
To ciphertext store to distributed storage network；
The distributed storage network is to be stored in the ciphertext of itself to generate corresponding data directory；
Second data terminal corresponds to intelligence friendship by checking that the description information in the data description table obtains targeted species data
The address of easy contract, and the intelligent Trade contract under described address is called to initiate the targeted species number to the block chain network
According to transaction request；
When first data terminal receives and agrees to the transaction request, by the intelligent Trade contract to described
Two data terminals return to the corresponding data directory of the targeted species data and decruption key, while receiving in the transaction request
Including transaction data；
Second data terminal is found according to the data directory and decruption key received in the distributed storage network
Corresponding ciphertext and decryption obtain can read raw data；Wherein, each terminal is the composition node in the block chain network.
2. data trade method according to claim 1, which is characterized in that first data terminal utilizes unique key
To generated in each predetermined period can transaction data be encrypted, including：
First data terminal obtains the period start time of the identity identification information and each predetermined period of itself；
The identity identification information and the period start time are generated and each default week by rivest, shamir, adelman
Phase uniquely corresponding public key and private key；
First data terminal is utilized to be generated in each predetermined period uniquely corresponding predetermined period of corresponding public key encryption
Can transaction data.
3. data trade method according to claim 2, which is characterized in that utilized and each institute in first data terminal
State predetermined period uniquely corresponding public key encryption correspond to generate in predetermined period can further include after transaction data：
Key is established in first data terminal and preserves queue, and each pair of using the pairs of preservation of key preservation queue
Public key and private key.
4. data trade method according to claim 3, which is characterized in that the intelligent Trade in the case where calling described address closes
Before the transaction request for about initiating the targeted species data to the block chain network, further include：
Public key from second data terminal to all node broadcasts oneself in the block chain network so that described
The corresponding data directory of targeted species data and decryption described in public key encryption of one data terminal using second data terminal
Key.
5. data trade method according to claim 1, which is characterized in that further include：
In the intelligent Trade contract using issue terminal and the targeted species data are generated for the publication application
First data terminal is arranged different transaction data and is divided into ratio.
6. data trade method according to any one of claims 1 to 5, which is characterized in that further include：
The block chain network record is deployed in all calling, the use information of the intelligent Trade contract of itself.
7. a kind of data transacting system based on block chain, which is characterized in that including：
Using issue terminal, the corresponding intelligent Trade contract of application for generating with issuing, and by the intelligent Trade contract
It is deployed to block chain network；Wherein, there are the transaction canals between data trade demand both sides for establishing for the intelligent Trade contract
Road；
First data terminal, for it is described apply generate in use can transaction data classify, and using various types of
Can the description information of transaction data and the address of corresponding intelligent Trade contract establish data description table；Using unique key to each pre-
If generate in the period can transaction data be encrypted, and obtained ciphertext is stored to distributed storage network；When receiving
And when agreeing to the transaction request, the targeted species number is returned to first data terminal by the intelligent Trade contract
According to corresponding data directory and decruption key, while receiving the transaction data for including in the transaction request；
The distributed storage network, for generating corresponding data directory to be stored in the ciphertext of itself；
Second data terminal, for corresponding to intelligence by checking that the description information in the data description table obtains targeted species data
Can merchandise the address of contract, and the intelligent Trade contract under described address is called to initiate the target species to the block chain network
The transaction request of class data；According to the data directory and decruption key received correspondence is found in the distributed storage network
Ciphertext and decryption obtain can read raw data；
Wherein, each terminal is the composition node in the block chain network.
8. data transacting system according to claim 7, which is characterized in that first data terminal is specially to be obtained from
The period start time of the identity identification information of body and each predetermined period；By the identity identification information and from the period
Time of beginning is generated and each predetermined period uniquely corresponding public key and private key by rivest, shamir, adelman；Using with it is each described
Predetermined period uniquely corresponding public key encryption correspond to generate in predetermined period can transaction data data terminal.
9. data transacting system according to claim 8, which is characterized in that first data terminal is additionally operable to：It establishes
Key preserves queue, and preserves the pairs of each pair of public key of preservation and private key of queue using the key.
10. data transacting system according to claim 9, which is characterized in that second data terminal is additionally operable to：Xiang Wei
The public key of all node broadcasts oneself in the block chain network, so that first data terminal is counted using described second
The corresponding data directory of targeted species data and decruption key described in public key encryption according to terminal.
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