CN106341421A - Block chain technology based data exchange method - Google Patents

Block chain technology based data exchange method Download PDF

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Publication number
CN106341421A
CN106341421A CN201610929594.3A CN201610929594A CN106341421A CN 106341421 A CN106341421 A CN 106341421A CN 201610929594 A CN201610929594 A CN 201610929594A CN 106341421 A CN106341421 A CN 106341421A
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data
record
block
point
subset
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CN201610929594.3A
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CN106341421B (en
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黄步添
吴磊
陈建海
王云霄
刘振广
石太彬
王从礼
张维赛
杨正清
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杭州云象网络技术有限公司
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00Network-specific arrangements or communication protocols supporting networked applications
    • H04L67/10Network-specific arrangements or communication protocols supporting networked applications in which an application is distributed across nodes in the network
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00Network architectures or network communication protocols for network security
    • H04L63/04Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
    • H04L63/0428Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
    • H04L63/0442Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload wherein the sending and receiving network entities apply asymmetric encryption, i.e. different keys for encryption and decryption

Abstract

The invention discloses a block chain technology based data exchange method. The method uses the block chain technology into the field of data exchange and constructs a distributed type autonomous data exchange system based on the block chain technology. The free data exchange among multiple nodes in a network is realized through the design of a consensus algorithm for multiple nodes. At the same time, the invention applies the ellipse asymmetric encryption algorithm in the block chain technology, which can greatly guarantee the security in the data transmission process and can effectively prevent the data from being leaked and illegally tampered. The present invention makes full use of the block chain technology to decentralize the data organization characteristic, changes the point-to-point and the traditional data exchange way based on the multi-point data communication of a specific central platform, and greatly improves the data exchange efficiency and reduces the costs for data transfer and data exchange.

Description

A kind of method for interchanging data based on block chain technology

Technical field

The invention belongs to Data Interchange Technology field is and in particular to a kind of method for interchanging data based on block chain technology.

Background technology

Nowadays the big data epoch are come into.Except links such as the collection of data, analyses, the exchange of data is also become with shared Obtain important increasingly.Currently, every field generally all establishes the full and accurate database of data, but social all trades and professions are even same The database of industry not commensurate is often customized for the business demand of itself, and this makes system environments, data platform etc. There are greatest differences.Generally lack data exchange and shared design at the beginning of construction again, define " barrier " of data exchange.

When user recognizes the importance of data exchange, Data Interchange Technology also has development to a certain extent and enters Step, such as Point-to-Point Data exchange and by setting up data center to exchange.Point-to-Point Data exchanged form is often in small range Interior application, widespread adoption by expose its inefficiency the drawbacks of it is clear that the requirement in big data epoch instantly cannot be adapted to;Set up Data center carries out data exchange and may apply to wide range compared with ad hoc mode, and exchange efficiency also increases, but All data are required to make the construction maintenance cost of data center high through data center's exchange, and data exchange efficiency Lifting also relatively more limited.

With the invention of the digital encryption currency such as bit coin, gradually rise a kind of brand-new, decentralization, referred to as block The distributed basis framework of chain and data operation mode.The spy of decentralization, the maintenance of distributed collective and node common recognition algorithm Point makes block chain technology be particularly suitable for building Decentralized Autonomous system, the O&M efficiency of lift system.At present, block chain technology has been Through causing the highest attention of financial institution, national governments and capital market, but it not yet has related answering in field of data exchange With how utilizing block chain technique construction data exchange system and platform, thus it is worth that the efficient exchange realizing data is shared The problem of research.

Content of the invention

In view of above-mentioned, the invention provides a kind of method for interchanging data based on block chain technology, by building dispersion certainly Control formula data exchange system, be capable of the efficient exchange of data and share.

A kind of method for interchanging data based on block chain technology, comprises the steps:

(1) build Decentralized Autonomous formula data exchange system;

(2) data that in system, oneself is stored by each node is made to carry out blocking encapsulation;

(3) independent blocks after the completion of node encapsulation each in system are connected into block chain;

(4) the common recognition algorithm between design node, in system, any two node can read acquisition using this common recognition algorithm The data that other side is stored;

(5) during data exchange, protection is encrypted to data among the nodes.

Further, in the Decentralized Autonomous formula data exchange system that described step (1) builds, each database corresponds to For a node, the numerous nodes in whole system are all equality, and each node all can be independently completed data preparation, envelope Dress, the autonomous management of encryption, and data exchange can be carried out with other all nodes in system.Exchange with Point-to-Point Data System is compared, and in Decentralized Autonomous formula data exchange system, each node can realize the data exchange of 1 couple of n-1, and data exchange is imitated Rate is greatly improved;Compared with the system being transmitted through data center, each node in Decentralized Autonomous formula data exchange system Decentralized Autonomous, need not set up independent data center, greatly save construction and maintenance cost.

Further, the data that oneself is stored by described step (2) interior joint carries out the area that blocking encapsulation is adopted Block structure is made up of block head and block body, and block head is the essential information hurdle of independent blocks, and its enclosed inside has block current Version number, the address of a upper block, timestamp, the cryptographic Hash of current block, random number and next block address;Area Then encapsulate the data bulk of present node in block and block create during generate and all data through checking Change record, all data change records the root of merkle tree is found by hash process and described be credited in block head.

Further, the sequencing in described step (3) temporally stabbing each independent blocks connects into block chain, if There is two and two or more timestamp identical block, then make the node preferential attachment that data bulk is big, by this block chain There is not side chain, be easy to inquiry and the exchange of data.

Further, in described step (4), the detailed process of common recognition algorithm is as follows:

4.1 input record data t, count the record strip number of wherein each common property, are designated as n respectively1~nd, and then by its In each record as the point in the one-dimensional space, make s represent all and record corresponding point set;D is in input record data t Common property quantity, n1~ndIt is respectively the record strip number of 1~d common property;

4.2 take n1~ndIn maximum give parameter gcnt;I-th record subset qi of initializationiFor empty set, i-th note Record subset ciFor empty set, arbitrarily remove a point p, more new record subset qi from point set si=qii∪ p, more new record subset ci=ci∪ p, makes siRepresent the set removing left point in s after point p;And then according to above-mentioned traversal i=1~gcnt;

4.3 for set si, remove s one by oneiIn point;For any point s being removed, if distance (s, z) ≠ 0z ∈cj, then more new record subset qij=qij∪ s, more new record subset cj=cj∪ s, 1≤j≤gcnt and j ≠ i;

And k ≠ j ≠ i, if Then more new record subset qii=qij∪ s, more new record subset cj=cj∪s;

Wherein: z is record subset cjIn any bar record, x be record subset ciIn any bar record, y be record Collection ckIn any bar record, distance (s, m) be corresponding to point s record with record m dissimilar canonical function, m= X, y or z;

If 4.4 record subsets qijIn the q article record rqMeet following condition, then result { the r' after being replaced a1,···,r'·ad,r'·as, j } write to output record data t*In;

r'·a1=rq·a1,···,r'·ad=rq·ad,r'·as=rf(q)·as

Wherein: q ∈ 1, | qij|, | qij| for recording subset qijIn record strip number, a1~adCorrespond to defeated Enter the 1~d common property in record data t, asFor the important attribute in input record data t, rq·a1~rq·adRight Should be record r in the 1~d common propertyqProperty value, rf(q)For recording subset qijIn the f (q) article record, f (q)=| qij|+1-q, rf(q)·asFor recording r in important attributef(q)Property value, r'asFor recording the property value of r' in important attribute, R' is set siIn finally remove one record.

Embodying of described dissmilarity canonical function distance (s, m) is as follows:

d i s tan c e ( s , m ) = σ n = 1 n ( s n - m n ) 2

Wherein: snNth elements value in recording corresponding to point s, mnFor the nth elements value in record m, n is record Dimension.

Further, in described step (5), protection is encrypted to data, that is, using elliptic curve encryption algorithm (ecc) Using two asymmetrical passwords in encryption and decryption processes: public key and private key, wherein data is carried out initializing encapsulation Node is encrypted to data clear text using public key, and other nodes carry out ciphertext using private key after obtaining data ciphertext and solved Close.This technical scheme can effectively prevent the leakage of data with the security ensureing in data transmission procedure of high degree With illegally distort.

The present invention makes full use of this data tissue characteristic of block chain technology decentralization, changes point-to-point and relies on Specific central platform carries out the conventional data exchange mode of multipoint data communication, significantly lifts data exchange efficiency, reduces number According to unloading and switching cost, realize the efficient exchange of data and share.

Brief description

Fig. 1 is the block schematic illustration of Decentralized Autonomous formula data exchange system of the present invention.

Fig. 2 is the data exchange flow process schematic diagram based on block chain technology for the present invention.

Fig. 3 is the structural representation that in the present invention, data block is packaged into block chain.

Fig. 4 is the schematic flow sheet of encryption and deciphering in the present invention.

Specific embodiment

In order to more specifically describe the present invention, below in conjunction with the accompanying drawings and specific embodiment is to technical scheme It is described in detail.

The method for interchanging data based on block chain technology for the present invention, specific implementation process is as follows:

(1) build the Decentralized Autonomous formula data exchange system based on block chain technology.

Traditional data exchange system has point-to-point exchange and swaps two kinds through data center, and the two has respectively Have the shortcomings that efficiency of transmission is low, O&M cost is high.In Decentralized Autonomous formula system of the present invention, each database is a data section Point, the numerous nodes in whole data network are equality, and each node can singly complete data preparation, encapsulation, add The autonomous management such as close, and data exchange can be carried out with other all nodes taking consistent common recognition algorithm in network, as Fig. 1 institute Show.

Compared with Point-to-Point Data switching architecture, in system of the present invention, each node can realize the data friendship of 1 couple of n-1 Change, data exchange efficiency is greatly improved;Compared with the system being transmitted through data center, each node in system of the present invention Decentralized Autonomous, need not set up independent data center, greatly save construction and maintenance cost.As shown in Fig. 2 each node will The data oneself being stored carries out blocking encapsulation and the independent blocks after numerous encryptions is linked into block chain.Different nodes it Between there is common recognition algorithm, two nodes can obtain by this common recognition algorithm and read the data storing mutually.

(2) the data encapsulation of node employs the block chain technology being widely used in ideal money, that is, adopt as Fig. 3 institute The independent blocks structure shown carries out blocking encapsulation to data, and each block is subdivided into block head and block body two parts.Wherein, The current version number of block, the in front and back address of block, timestamp, current block cryptographic Hash and random number are encapsulated in block head; The data bulk of current block and all data change records generating during verifying, block create are encapsulated in area In block.These data change records charge to block head by the root that Hash procedure finds merkle tree.

After the completion of encapsulation, need for the numerous independent blocks being packaged with data to be linked into block chain, take following principle: be every Independent blocks are linked into block chain according to the sequencing of data packaged by it by individual isolated node, multiple encapsulate if existing simultaneously Block then link order to determine according to the number of encapsulation of data quantity in each block, the big preferential link of data volume.Press According to above-mentioned chaining method, in block chain, there is not side chain, be easy to inquiry and the exchange of data.

(3) build the common recognition algorithm of numerous nodes in network, get through the passage of data exchange between arbitrary node;Common recognition algorithm Detailed process as follows:

A. input record data t, counts the record strip number of wherein each common property, is designated as n respectively1~nd, and then will wherein Each record, as the point in the one-dimensional space, makes s represent all and records corresponding point set;D is in input record data t Common property quantity, n1~ndIt is respectively the record strip number of 1~d common property;

B. take n1~ndIn maximum give parameter gcnt;I-th record subset qi of initializationiFor empty set, i-th note Record subset ciFor empty set, arbitrarily remove a point p, more new record subset qi from point set si=qii∪ p, more new record subset ci=ci∪ p, makes siRepresent the set removing left point in s after point p;And then according to above-mentioned traversal i=1~gcnt;

C. for set si, remove s one by oneiIn point;For any point s being removed, if distance (s, z) ≠ 0z ∈cj, then more new record subset qij=qij∪ s, more new record subset cj=cj∪ s, 1≤j≤gcnt and j ≠ i;

And k ≠ j ≠ i, if Then more new record subset qii=qij∪ s, more new record subset cj=cj∪s;

Wherein: z is record subset cjIn any bar record, x be record subset ciIn any bar record, y be record Collection ckIn any bar record, distance (s, m) be corresponding to point s record with record m dissimilar canonical function, m= X, y or z;

d i s tan c e ( s , m ) = σ n = 1 n ( s n - m n ) 2

Wherein: snNth elements value in recording corresponding to point s, mnFor the nth elements value in record m, n is record Dimension.

If d. recording subset qijIn the q article record rqMeet following condition, then result { the r' after being replaced a1,···,r'·ad,r'·as, j } write to output record data t*In;

r'·a1=rq·a1,···,r'·ad=rq·ad,r'·as=rf(q)·as

Wherein: q ∈ 1, | qij|, | qij| for recording subset qijIn record strip number, a1~adCorrespond to defeated Enter the 1~d common property in record data t, asFor the important attribute in input record data t, rq·a1~rq·adRight Should be record r in the 1~d common propertyqProperty value, rf(q)For recording subset qijIn the f (q) article record, f (q)=| qij|+1-q, rf(q)·asFor recording r in important attributef(q)Property value, r'asFor recording the property value of r' in important attribute, R' is set siIn finally remove one record.

(4) encryption in node data exchange process and decrypting process are improved.

The present invention takes elliptic curve encryption algorithm (ecc) this rivest, shamir, adelman, in encryption and decryption processes Using two asymmetrical passwords, it is referred to as public key and private key.Fig. 4 gives corresponding data ciphering and deciphering flow process, wherein The node that data is carried out initialize with encapsulation utilizes public key to works plain text encryption, and other nodes utilize after obtaining data ciphertext Private key carries out ciphertext deciphering.

The above-mentioned description to embodiment is to be understood that for ease of those skilled in the art and apply the present invention. Person skilled in the art obviously easily can make various modifications to above-described embodiment, and described herein general Principle is applied in other embodiment without through performing creative labour.Therefore, the invention is not restricted to above-described embodiment, ability , according to the announcement of the present invention, the improvement made for the present invention and modification all should be in protection scope of the present invention for field technique personnel Within.

Claims (7)

1. a kind of method for interchanging data based on block chain technology, comprises the steps:
(1) build Decentralized Autonomous formula data exchange system;
(2) data that in system, oneself is stored by each node is made to carry out blocking encapsulation;
(3) independent blocks after the completion of node encapsulation each in system are connected into block chain;
(4) the common recognition algorithm between design node, in system, any two node can read acquisition other side using this common recognition algorithm The data being stored;
(5) during data exchange, protection is encrypted to data among the nodes.
2. method for interchanging data according to claim 1 it is characterised in that: the Decentralized Autonomous building in described step (1) In formula data exchange system, each database corresponds to a node, and the numerous nodes in whole system are all equality, often Individual node all can be independently completed data preparation, encapsulation, encryption autonomous management, and can with system other own Node carries out data exchange.
3. method for interchanging data according to claim 1 it is characterised in that: oneself is deposited by described step (2) interior joint The data of storage carries out the block structure that blocking encapsulation adopted and is made up of block head and block body, and block head is independent blocks Essential information hurdle, its enclosed inside has the current version number of block, the address of a upper block, timestamp, the Kazakhstan of current block Uncommon value, random number and next block address;Then encapsulate the data bulk of present node in block body and block creates During generate and all data change records through checking, all data change records are found by hash process The root of merkle tree and described are credited in block head.
4. method for interchanging data according to claim 1 it is characterised in that: by each independent blocks in described step (3) The sequencing temporally stabbing connects into block chain, if there is two and two or more timestamp identical block, makes data , there is not side chain by this block chain, be easy to inquiry and the exchange of data in the big node preferential attachment of quantity.
5. method for interchanging data according to claim 1 it is characterised in that: common recognition algorithm is concrete in described step (4) Process is as follows:
4.1 input record data t, count the record strip number of wherein each common property, are designated as n respectively1~nd, and then will be wherein every Article one, record, as the point in the one-dimensional space, makes s represent all and records corresponding point set;D is general in input record data t Logical number of attributes, n1~ndIt is respectively the record strip number of 1~d common property;
4.2 take n1~ndIn maximum give parameter gcnt;I-th record subset qi of initializationiFor empty set, i-th record Collection ciFor empty set, arbitrarily remove a point p, more new record subset qi from point set si=qii∪ p, more new record subset ci= ci∪ p, makes siRepresent the set removing left point in s after point p;And then according to above-mentioned traversal i=1~gcnt;
4.3 for set si, remove s one by oneiIn point;For any point s being removed, if distance (s, z) ≠ 0z ∈ cj, then more new record subset qij=qij∪ s, more new record subset cj=cj∪ s, 1≤j≤gcnt and j ≠ i;
And k ≠ j ≠ i, ifThen more New record subset qii=qij∪ s, more new record subset cj=cj∪s;
Wherein: z is record subset cjIn any bar record, x be record subset ciIn any bar record, y be record subset ck In any bar record, distance (s, m) be corresponding to point s record with record m dissimilar canonical function, m=x, y or z;
If 4.4 record subsets qijIn the q article record rqMeet following condition, then result { the r'a after being replaced1,…, r'·ad,r'·as, j } write to output record data t*In;
r'·a1=rq·a1,…,r'·ad=rq·ad,r'·as=rf(q)·as
Wherein: q ∈ 1 ..., | qij|, | qij| for recording subset qijIn record strip number, a1~adCorrespond to input record number According to the 1~d common property in t, asFor the important attribute in input record data t, rq·a1~rq·adCorrespond to the 1st~ R is recorded in d common propertyqProperty value, rf(q)For recording subset qijIn the f (q) article record, f (q)=| qij|+1-q, rf(q)·asFor recording r in important attributef(q)Property value, r'asFor recording the property value of r' in important attribute, r' is set siIn finally remove one record.
6. method for interchanging data according to claim 5 it is characterised in that: described dissmilarity canonical function distance Embodying of (s, m) is as follows:
d i s tan c e ( s , m ) = σ n = 1 n ( s n - m n ) 2
Wherein: snNth elements value in recording corresponding to point s, mnFor the nth elements value in record m, n is the dimension of record Degree.
7. method for interchanging data according to claim 1 it is characterised in that: added using elliptic curve in described step (5) Close algorithm is encrypted protection to data, that is, using two asymmetrical passwords in encryption and decryption processes: public key and private key, The node that wherein data is carried out initializing with encapsulation is encrypted to data clear text using public key, and other nodes are close in acquisition data Carry out ciphertext using private key after literary composition to be decrypted.
CN201610929594.3A 2016-10-31 2016-10-31 A kind of method for interchanging data based on block chain technology CN106341421B (en)

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