CN107171829A - A kind of dynamic node management method for algorithm realization of being known together based on BFT - Google Patents

A kind of dynamic node management method for algorithm realization of being known together based on BFT Download PDF

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Publication number
CN107171829A
CN107171829A CN201710272177.0A CN201710272177A CN107171829A CN 107171829 A CN107171829 A CN 107171829A CN 201710272177 A CN201710272177 A CN 201710272177A CN 107171829 A CN107171829 A CN 107171829A
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node
block chain
network
common recognition
whole network
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CN107171829B (en
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邱炜伟
李启雷
李伟
梁秀波
尹可挺
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Hangzhou Qulian Technology Co Ltd
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Hangzhou Qulian Technology Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/08—Configuration management of networks or network elements
    • H04L41/0876—Aspects of the degree of configuration automation
    • H04L41/0879—Manual configuration through operator
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/08—Configuration management of networks or network elements
    • H04L41/0803—Configuration setting
    • H04L41/0813—Configuration setting characterised by the conditions triggering a change of settings
    • H04L41/082—Configuration setting characterised by the conditions triggering a change of settings the condition being updates or upgrades of network functionality
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/30—Decision processes by autonomous network management units using voting and bidding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/08—Network architectures or network communication protocols for network security for authentication of entities
    • H04L63/0823—Network architectures or network communication protocols for network security for authentication of entities using certificates
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/08—Network architectures or network communication protocols for network security for authentication of entities
    • H04L63/0884—Network architectures or network communication protocols for network security for authentication of entities by delegation of authentication, e.g. a proxy authenticates an entity to be authenticated on behalf of this entity vis-à-vis an authentication entity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/14—Session management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/32—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
    • H04L9/3263—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials involving certificates, e.g. public key certificate [PKC] or attribute certificate [AC]; Public key infrastructure [PKI] arrangements
    • H04L9/3265—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials involving certificates, e.g. public key certificate [PKC] or attribute certificate [AC]; Public key infrastructure [PKI] arrangements using certificate chains, trees or paths; Hierarchical trust model
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/32—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
    • H04L9/3263—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials involving certificates, e.g. public key certificate [PKC] or attribute certificate [AC]; Public key infrastructure [PKI] arrangements
    • H04L9/3268—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials involving certificates, e.g. public key certificate [PKC] or attribute certificate [AC]; Public key infrastructure [PKI] arrangements using certificate validation, registration, distribution or revocation, e.g. certificate revocation list [CRL]

Abstract

The invention discloses a kind of dynamic node management method for algorithm realization of being known together based on BFT.In a block chain network, new node obtains access and the participation common recognition qualification of block chain network by obtaining certificate under line, and common recognition is successfully joined after being connected to the existing node request of the whole network and after being verified；And when block chain network is exited in a node request, exited to the whole network request, successfully exit block chain network after agreeing to through each node administrator.The step of newly-increased node is specially：New node takes CA certificate to obtain the link information of the whole network after being connected by sponsor's node, and block chain network is added after completing synchronization through the whole network common recognition and new node.The step of deletion of node is specially：The node exited is selected to exit request to the whole network broadcast, each node administrator's selection agrees to that it is exited, and node is exited to the whole network broadcast deletion；Agree to that node updates respective link information and exit node with selection after exiting when the whole network common recognition to disconnect, the node is cleared out in block chain network.

Description

A kind of dynamic node management method for algorithm realization of being known together based on BFT
Technical field
Realized the present invention relates to the block chain CA certificate system of decentralization, more particularly to a kind of BFT common recognition algorithms that are based on Dynamic node management method.
Background technology
Block chain technology, block chain is a kind of new decentralization agreement, can safely store digital cash and merchandise or it His data, information can not be forged and distorted, and all nodes of the trade confirmation on block chain on block chain are completed jointly, by altogether Know algorithm to ensure to safeguard a public account book on its consistency, block chain, public account book is located at any node in memory block It can be seen that, so as to ensure that it can not forge and distort.
The BFT common recognition algorithms of traditional block chain do not have the function that dynamic node is managed, although BFT there now have been a lot Improve and mutation version, be all in the guarantee and availability enhancing for uniformity of knowing together, for how dynamic manages section mostly The exploration of point always but is the state of blank.For by PBFT algorithms, the process of additions and deletions node is accomplished by all nodes All shut down, then more new configuration file, then all restart.But such way then seems in actual production and can not connect By the dynamic member problem of management for how solving BFT common recognition algorithms is in an actual challenge by block chain Technology application.
This intractable problem urgently to be resolved hurrily is exactly faced, we have proposed dynamic member administrative mechanism.Make whole block Catenary system can carry out dynamic additions and deletions node in the case of not shutting down.
The content of the invention
The purpose of the present invention is that there is provided a kind of dynamic section for algorithm realization of being known together based on BFT in view of the shortcomings of the prior art Point management method.
The purpose of the present invention is achieved through the following technical solutions：A kind of dynamic for algorithm realization of being known together based on BFT Node administration method, comprises the following steps：
1) ECert and RCert acquisition：The CA that new node adds block chain network is centrally generated by Third Party Authentication under line Certificate, the CA certificate includes Ecert certificates and Rcert certificates；Wherein, ECert is node access certificate, is only possessed The node of ECert certificates could enter block chain network, and RCert is the certificate that node participates in ballot common recognition, only possesses RCert Certificate could participate in the common recognition ballot of block chain network；
2) sponsor's mechanism：New node is believed by the network connection for selecting an existing node to take the whole network as sponsor The network connection information of the whole network is sent to new node by breath, sponsor's node verification CA certificate, certificate by rear；
3) existing node needs the ca authentication that 2f+1 node agreement passes through new node：New node takes the network of the whole network Link information needs to continue to take CA certificate and whole node request connections, and existing node confirms that 2f+1 node of the whole network agrees to new After the certification of node Opposite direction connection is set up with new node；
4) new node recovers into Recovery：Triggered after new node confirms that N-f node of the whole network is all connected with oneself, The Recovery of new node is then synchronous with other nodes holding in block chain network when completing；
5) new node becomes a full member of common recognition ballot：Added altogether to the whole network broadcast application after new node completes Recovery Know, the whole network common recognition real parameter for updating common recognition algorithm after agreeing to, new node completes adition process；
6) exiting the certification of node needs the confirmation by each node administrator：Exiting node needs into block chain network All nodes submit exit apply, by each node administrator authentication confirm agree to after initiate the whole network know together confirmation exit node Information；
7) existing node is disconnected with exiting node：Existing node confirms that 2f+1 nodes grant an application and exits asking for node Network connection is disconnected with exiting node after asking, the whole network link information of oneself is updated；
8) block chain network updates common recognition parameter：Existing node confirms oneself to have updated the whole network broadcast after link information and updated Common recognition parameter, completes renewal after confirming that the whole network 2f+1 nodes are agreed to update, exits node and just really exit block chain network.
Further, described step 1) in, ECert certificates ensure that the common recognition node for participating in ballot and be not involved in ballot Accounting nodes can smoothly enter block chain network in；RCert certificates ensure that node possesses the authority for participating in ballot, and one altogether Knowing the addition of node needs while success could be added by possessing both certificates；New node at the beginning of establishment, in Third Party Authentication The heart preserves root certificate, and the node that each application adds block chain network is required under line applying for certificate in the minds of Third Party Authentication, And then by Third Party Authentication center revoke certificates after exiting.
The beneficial effects of the invention are as follows：The present invention is applied in the block chain network under alliance's chain background, that is, ensure that BFT The validity of algorithm, while solve BFT again supports disagreeableness problem for dynamic node, it is block under BFT common recognition systems The quantum jump of chain technology.For BFT class algorithms on traditional block chain, the process of additions and deletions node needs all to stop all nodes Machine, then more new configuration file, then all restart.The problem of this has a large amount of in the practical application of block chain technology, not only It cannot be guaranteed that the availability of system, will also expend a large amount of manapower allocations and restart, it is a big pain spot of block chain application.And we carry The dynamic node management function gone out then solves this problem, makes entirely when during additions and deletions node still to ensure effectively Property.
Brief description of the drawings
Fig. 1 is new node dynamic access state diagram；
Fig. 2 is to exit node dynamically to exit state diagram；
Fig. 3 is that new node is dynamically added flow chart；
Fig. 4 is to exit node dynamically to exit flow chart.
Embodiment
The present invention is described in detail below according to the drawings and specific embodiments, the purpose of the present invention and effect will become brighter It is aobvious.
A kind of dynamic node management method of algorithm realization of being known together based on BFT of the present invention, is comprised the following steps：
1) ECert and RCert acquisition：Obtained under line and new node addition block chain network is centrally generated by Third Party Authentication CA certificate, the CA certificate include Ecert certificates and Rcert certificates；Wherein, ECert is node access certificate, is only possessed The node of ECert certificates could enter block chain network, and RCert is the certificate that node participates in ballot common recognition, only possesses RCert Certificate could participate in the common recognition ballot of block chain network；
2) sponsor's mechanism：New node is believed by the network connection for selecting an existing node to take the whole network as sponsor The network connection information of the whole network is sent to new node by breath, sponsor's node verification CA certificate, certificate by rear；
3) existing node needs the ca authentication that 2f+1 node agreement passes through new node：Such as Fig. 1 first step, new node Taking the network connection information of the whole network needs to continue to take CA certificate and whole node request connections, and existing node confirms the whole network 2f + 1 node sets up Opposite direction connection after agreeing to the certification of new node with new node；
4) new node recovers into Recovery：As shown in Fig. 1 line of demarcation, N-f node of the whole network is confirmed in new node Triggered after being all connected with oneself, the Recovery of new node is then synchronous with other nodes holding in block chain network when completing；
5) new node becomes a full member of common recognition ballot：As shown in Fig. 1 last three step, new node complete Recovery after to The whole network broadcast application adds common recognition, and the whole network common recognition real parameter for updating common recognition algorithm after agreeing to, new node completes adition process；
6) exiting the certification of node needs the confirmation by each node administrator：As shown in Fig. 2 exiting node needs to area All nodes in block chain network, which are submitted, exits application, confirms that initiation the whole network common recognition is true after agreeing to by the administrator authentication of each node Recognize the information for exiting node；
7) existing node is disconnected with exiting node：As shown in Fig. 2 second step, existing node confirms that 2f+1 nodes are same Meaning application disconnects network connection after exiting the request of node with exiting node, updates the whole network link information of oneself；
8) block chain network updates common recognition parameter：As shown in Fig. 2 last three step, existing node confirms that oneself has updated company Connect the whole network broadcast after information and update common recognition parameter, complete to update after confirming that the whole network 2f+1 nodes are agreed to update, exit node Really exit block chain network.
Further, described step 1) in, the management of the dynamic node of block chain network be based on CA certificate system, ECert, which ensure that the common recognition node for participating in ballot and be not involved in the accounting nodes of ballot, smoothly to be entered in block chain network； RCert ensure that node possesses the authority for participating in ballot.The addition of one common recognition node needs to possess two kinds of certificate ability simultaneously Add successfully, CA systems are also the premise that whole block chain network realizes dynamic node management.At the beginning of establishment, it can be recognized by third party Card center preserves root certificate, and the node that each application adds block chain network is required under line applying demonstrate,proving to Third Party Authentication center Book, and then by Third Party Authentication center revoke certificates after exiting.
Further, described step 2) in, new node, which adds block chain network, needs the link information of the whole network, while root Obtaining the whole network link information according to BFT algorithm ideas needs the whole network to know together, and this is originally an antinomy, but based on the applied field of alliance's chain We introduce sponsor's mechanism to scape, and the optional existing node appointed of winning the confidence of new node obtains the network connection of the whole network as sponsor Information.
Further, the step 3) in, existing node needs to confirm that 2f+1 node of the whole network is recognized by the CA of new node Just counter connect can be set up after card with new node, it is to avoid new node is only connected with part of nodes, the possibility for causing small range to know together.
Further, described step 4) in, new node confirms N-f node of the whole network and is not after oneself setting up counter connect Common recognition effect is immediately played, because new node does not have the historical data in block chain network, if at this time immediately adding common recognition It is to be added some points addition as a Byzantium on the contrary, the fault-tolerance of whole system can be influenceed, so needs to enter Recovery streams Journey, as depicted step 5) in only after new node is with node data Complete Synchronization in block chain network, whole system Real to update common recognition parameter, new node becomes a full member of common recognition.
Further, described step 6) in, node, which exits block chain network, needs node administrator manually to participate in, and is exactly Exited in order to avoid there is node to forge or steal nodal information malice, only when node administrator confirms to agree to that the node exits block The whole network common recognition can be carried out after chain network and deletes the node.
Illustrate embodiment with a block chain transaction examples below：
There is A, B, C in block chain network, tetra- nodes of D, simulation E nodes obtain addition block link network after CA certificate under line Network.
As shown in Figure 3：First, E nodes are lower online obtains ECert and RCert, then selects A nodes as sponsor, matches somebody with somebody Put and started after configuration file, passed the whole network link information back after the CA certificate that A node verifications pass through E nodes, E nodes then with The application of the whole network node sets up connection and adds common recognition network, and existing four nodes are anti-by being carried out after 2f+1 common recognition certifications with E nodes Even, E nodes start Recovery in N-f existing nodes of confirmation and after oneself setting up connection, treat that Recovery completions then can be complete Net broadcast application adds block chain network.
There is A, B, C, D in block chain network, block chain network is exited in tetra- nodes of E, analog node E applications.
As shown in Figure 4：First, E is saved to the whole network broadcast application and is exited block chain network (it should be noted that being only supported at 5 Abreviation point is carried out in the presence of individual and above node, because 4 is ensure the lowest numeric of Byzantium problem), each node is by keeper Agreement exits rear the whole network broadcast and deletes E nodes, and each node after verifying of being known together through 2f+1 disconnects the connection with E nodes, and in the case where connecing To update common recognition parameter by a wheel common recognition again, E nodes formally exit block chain network.

Claims (2)

1. a kind of dynamic node management method for algorithm realization of being known together based on BFT, it is characterised in that comprise the following steps：
1) ECert and RCert acquisition：The CA cards that new node adds block chain network are centrally generated by Third Party Authentication under line Book, the CA certificate includes Ecert certificates and Rcert certificates；Wherein, ECert is node access certificate, only possesses ECert The node of certificate could enter block chain network, and RCert is the certificate that node participates in ballot common recognition, only possesses RCert certificates The common recognition ballot of block chain network could be participated in.
2) sponsor's mechanism：New node takes the network connection information of the whole network by one existing node of selection as sponsor, The network connection information of the whole network is sent to new node by sponsor's node verification CA certificate, certificate by rear.
3) existing node needs the ca authentication that 2f+1 node agreement passes through new node：New node takes the network connection of the whole network Information needs to continue to take CA certificate and whole node request connections, and existing node confirms that 2f+1 node of the whole network agrees to new node Certification after and new node set up Opposite direction connection.
4) new node recovers into Recovery：Triggered after new node confirms that N-f node of the whole network is all connected with oneself, new section The Recovery of point is then synchronous with other nodes holding in block chain network when completing.
5) new node becomes a full member of common recognition ballot：Common recognition is added to the whole network broadcast application after new node completes Recovery, entirely Net common recognition real parameter for updating common recognition algorithm after agreeing to, new node completes adition process.
6) exiting the certification of node needs the confirmation by each node administrator：Exiting node needs the institute into block chain network There is node to submit and exit application, confirm that the whole network common recognition is initiated after agreeing to be confirmed to exit the letter of node by the administrator authentication of each node Breath；
7) existing node is disconnected with exiting node：Existing node, which confirms that 2f+1 nodes grant an application, to be exited after the request of node Network connection is disconnected with exiting node, the whole network link information of oneself is updated.
8) block chain network updates common recognition parameter：Existing node confirms oneself to have updated the whole network broadcast after link information and updates common recognition Parameter, completes to update after confirming that the whole network 2f+1 nodes are agreed to update, exits node and just really exit block chain network.
2. a kind of dynamic node management method of algorithm realization of being known together based on BFT as claimed in claim 1, it is characterised in that Described step 1) in, ECert certificates ensure that the common recognition node for participating in ballot and be not involved in the accounting nodes energy of ballot smoothly Into in block chain network；RCert certificates ensure that node possesses the authority for participating in ballot, and the addition of a common recognition node needs Success could be added by possessing both certificates simultaneously；New node at the beginning of establishment, preserves root certificate, each by Third Party Authentication center The node that application adds block chain network is required under line applying for certificate to Third Party Authentication center, and then by the 3rd after exiting Square authentication center's revoke certificates.
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