CN110062034A - A kind of big file safety storage method of block chain and system - Google Patents
A kind of big file safety storage method of block chain and system Download PDFInfo
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- CN110062034A CN110062034A CN201910258358.7A CN201910258358A CN110062034A CN 110062034 A CN110062034 A CN 110062034A CN 201910258358 A CN201910258358 A CN 201910258358A CN 110062034 A CN110062034 A CN 110062034A
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- 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
- H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
- H04L63/0428—Network 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
- H04L63/0442—Network 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
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- 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
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1095—Replication or mirroring of data, e.g. scheduling or transport for data synchronisation between network nodes
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- 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
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1097—Protocols in which an application is distributed across nodes in the network for distributed storage of data in networks, e.g. transport arrangements for network file system [NFS], storage area networks [SAN] or network attached storage [NAS]
Abstract
The present invention relates to a kind of big file safety storage method of block chain and systems, method for secure storing are as follows: 1) big file is registered in block chain by block chain node users, and storage system stores the copy of the redundant storage big file in network by big file declustering and in block chain；2) big file is split as N block, and redundancy is K parts, and random storage is into M memory node；3) memory node is the set of block chain node and cloud storage node；4) user is using public key encryption file block and the index record of storage location into block chain block；5) user can decrypt file block with private key and storage location indexes, recover big file after any Node registers block chain.Present invention raising solves the problems, such as that big file secure storage, Fast synchronization in block chain, system realize that user arbitrarily switches the safety operation that terminal security restores big file, breach the limitation of block chain transaction file size.
Description
Technical field
The present invention relates to a kind of block chain storage method and systems, and in particular to is related to a kind of big file security of block chain and deposits
Method for storing and system, belong to computer network security field.
Background technique
Block chain application scenarios start to be deep into multiple fields, lead to that magnanimity application cochain fortune will be had on main chain platform
Row.For block chain underlying platform, not only need to have in the performances such as high concurrent, trade confirmation speed, safety larger
It is promoted, each mechanism access block chain shared data becomes the difficult point encountered in development.During shared data, reliable data
The access control of management and safety is vital.Therefore, the demand of big file, chunk data distributed storage is also got over
Come more urgent.
The current research stored for block chain and data and scheme are concentrated mainly on following several classes.One kind is in block
Method and system (such as patent 201710139269.1, patent of extension storage are carried out on the existing node of chain and block space
201711344195.1 etc.), mainly expand block chain using memory database and disk database, the disk of single node and interior
The rapid expanding that can not adapt to big file transactions is deposited, therefore the effect of such method is actively limited.Second class is deposited using multistage
The block chain storage method (such as patent 201810937197.X, 201810847133.0) of storage, by the way of multistage storage
Capacity enlargement is carried out, increases the complexity of system administration and the difficulty of scheduling, inefficiency cannot ensure the peace of memory node
Full property storage is in the above context；The data fragmentation of use is and non-supporting also for the parallel processing for carrying out the calculating of block chain
Safety.Third class is safety (such as patent by the way of data encryption to increase block chained file and data storage
201811118776.8, system IPFS scheme etc.), computations cost is high, scalability is poor.More schemes focus on block chain
Security application (such as patent 201810903905.8,201711344107.8, MIT research method MecFile), mainly uses
Block chain technology prevents memory system data anti-tamper, is the security application of block chain, rather than ensures block chain inherently safe.
Block chain is quickly grown in data sharing and data trade field, and current block chained file storage system has very big
The problems such as limitation, that there are storage efficiencies is low, cost is high when facing the application of big file etc..Since block chain be not limited to bit
The application of a small amount of numerical calculation such as coin, therefore it is huge to support that the block chain storage method of big file security storage and equipment have
Application value.
Summary of the invention
In view of this, being deposited the invention discloses a kind of big file safety storage method of block chain and system by constructing cloud
The virtual memory space of inclined graduation is realized in storage and the storage of block chain node, and it is more that big file, which is fragmented and is split as muti-piece and redundancy,
Part, random storage to memory node only retains the file block rope of a small amount of user encryption in the file information block of block chain
Draw and indexed with storage location, after user switches and logs in node, simultaneously operating can be executed and recover big file.The present invention improves
Solve the problems, such as big file secure storage, Fast synchronization in block chain, it is extensive that system realizes that user arbitrarily switches terminal security
The safety operation of multiple big file, breaches the limitation of block chain transaction file size.
Technical scheme is as follows: a kind of big file safety storage method of block chain, step include:
1) big file is registered in block chain by block chain node users, and storage system is stored by big file declustering and in block chain
The copy of the redundant storage big file in network；
2) big file is split as N block, and redundancy is K parts, and random storage is into M memory node；
3) memory node is the set of block chain node and cloud storage node；
4) user is using public key encryption file block and the index record of storage location into block chain block；
5) user can decrypt file block with private key and storage location indexes, recover after any Node registers block chain
Big file.
Further, the storage of big file is not interfere with each other independently of block chain account book record storage, the two.
Further, the method that big file F is split is as follows:
1) big file is averagely split into N parts in binary form, wherein N >=1；
2) by K parts of the N one's share of expenses for a joint undertaking file redundancy, namely FN | fn, n=1 ... N } * K=fn1, fn2, fn3 ..., fnK | n=
1,…N }；
3) file index is established for the big file and subfile of fractionation；
4) it is Ψ byte (Bytes), the file when file size is under threshold value Ψ that the fractionation threshold value of big file, which is file size,
Without fractionation (namely N=1), K parts of direct redundancy, every portion all with the public key encryption of user and establishes index.
Further, the distributed node constructive method of the storage system are as follows:
1) each node division of block chain shares memory space, and full chain node number is W；
2) P dummy storage node of cloud computing storage setting, node are virtually isolated with tenant's permission；
3) distributed node M=W+P of storage system is unified to carry out node index.
Further, using be randomly assigned storage algorithm by NK one's share of expenses for a joint undertaking file random storage into M memory node, Ziwen
After part and storage location index { nk, m } use the public key encryption of user, it is recorded into the file information block of block chain.
Further, the big file access pattern method are as follows:, can be with oneself private key from area after user logs in arbitrary node
The index of big file is decrypted in block chain, so that big file required for restoring, is stored in local.
The present invention also proposes a kind of big file security storage system of block chain, including file declustering module, memory node pipe
Reason module, subfile and storage location index encryption/decryption module, the file information are registered to the interface module of block chain, file access pattern
Module, which is characterized in that further include that storage destructive test module, the file information block and transaction block synchronization module, file turn
Shifting formwork block and file update module；
The storage destructive test module causes big file subfile in situations such as memory node suspension, cloud storage area damage
In the case that copy damages, copy amount detection is carried out, Active Replication copy is to K parts, to ensure the complete recovery of big file；
The file information block and transaction block synchronization module send message when document transaction occurs in block chain
Synchronic command is to the file information block, the synchronized update that keeps a record；
The file shift module is in transaction document operation, and file ownership changes, document original owner's private key
File and storage location index are decrypted, is indexed with the public key re-encrypted file and storage location of document recipient, and modify text
Part information block record, file are attributed to recipient；
The file update module, for file modification, after deletion, storage system to the change of the redundancy backup of this document, delete
Except operation, while record is modified in the file information block.
The beneficial effects of the present invention are:
The present invention provides a kind of big file safety storage method of block chain and systems, pass through building cloud storage and block chain node
The virtual memory space of inclined graduation is realized in storage, and big file, which is fragmented, is split as muti-piece and redundancy is more parts, and random storage is to depositing
Node is stored up, the file block index and storage location rope of a small amount of user encryption are only retained in the file information block of block chain
Draw, after user switches and logs in node, simultaneously operating can be executed and recover big file.Present invention raising solves big file and exists
Secure storage, the problem of Fast synchronization in block chain, system realize that user arbitrarily switches the safety that terminal security restores big file
Operation, breaches the limitation of block chain transaction file size, provides the technology guarantor of secure storage for the big file application of block chain
Barrier.
Detailed description of the invention
Attached drawing 1 is the configuration diagram of the big file security storage system of block chain of the present invention.
Specific embodiment
The invention will be further described with reference to the accompanying drawings and examples:
The big file security storage system of block chain disclosed in one embodiment of the invention, the steps include:
1) block chain virtual memory module is established, node, the cloud is locally stored including cloud storage node and block chain node
Memory node is virtually isolated using tenant's permission, and multiple memory nodes are virtually isolated on one or more clouds；The area
The node that is locally stored of block chain node is the shared memory space isolated on block chain user node；
2) big file block splits module, first judges whether file size is greater than threshold value Ψ, if file size threshold value Ψ it
File will be without fractionation (namely N=1) when lower；If file is not less than threshold value Ψ, big file is averagely split in binary form
At N parts, by K parts of the N one's share of expenses for a joint undertaking file redundancy, namely FN | fn, n=1 ... N } * K=fn1, fn2, fn3 ..., fnK | n=
1,…N }；
3) random storage module will using random storage method after carrying out redundancy K parts to the subfile after the big file declustering
All N*K one's share of expenses for a joint undertaking duplicate of the document storages are into virtual storage system；For being less than the file of threshold value, K parts of direct redundancy, and use
After client public key encryption, random storage is into big document storage system；
4) the file information logging modle, after completing subfile copy random storage, by subfile and storage location index nk,
M } using the public key encryption of user after, and be recorded into the file information block of block chain；
5) file extraction module, after user logs in block chain link point or switching login node, from the file information block of block chain
Middle extraction subfile copy and its storage text information simultaneously decrypt, from storage system downloaded copy carry out big text local it is extensive
It is multiple.
The big file security storage system of block chain disclosed in one embodiment of the invention further includes storage destructive test mould
Block, the file information block and transaction block synchronization module, file shift module and file update module, in which:
The storage destructive test module causes big file subfile in situations such as memory node suspension, cloud storage area damage
In the case that copy damages, copy amount detection is carried out, Active Replication copy is to K parts, to ensure the complete recovery of big file；
The file information block and transaction block synchronization module send message when document transaction occurs in block chain
Synchronic command is to the file information block, the synchronized update that keeps a record；
The file shift module is in transaction document operation, and file ownership changes, document original owner's private key
File and storage location index are decrypted, is indexed with the public key re-encrypted file and storage location of document recipient, and modify text
Part information block record, file are attributed to recipient；
The file update module, for file modification, after deletion, storage system to the change of the redundancy backup of this document, delete
Except operation, while record is modified in the file information block.
The big file safety storage method of block chain in attached drawing and system are carried out below by way of specific example further
Illustrate:
As shown in the picture, the big file security storage system of a kind of block chain, comprising: file declustering module, memory node manage mould
Block, subfile and storage location index encryption/decryption module, the file information are registered to the interface module of block chain, file access pattern mould
Block, storage destructive test module, the file information block and transaction block synchronization module, file shift module and file update mould
Block；Its key step includes:
1, the file declustering module carries out size judgement to big file and fragment is split:
A) big file is averagely split into N parts in binary form, wherein N >=1；
B) by K parts of the N one's share of expenses for a joint undertaking file redundancy, namely FN | fn, n=1 ... N } * K=fn1, fn2, fn3 ..., fnK | n=
1,…N }；
C) file index is established for the big file and subfile of fractionation；
D) it is Ψ byte (Bytes), the file when file size is under threshold value Ψ that the fractionation threshold value of big file, which is file size,
Without fractionation (namely N=1), K parts of direct redundancy, every portion all with the public key encryption of user and establishes index；
2, the memory node management module, manages the distributed node of storage system:
A) each node division of block chain shares memory space, and full chain node number is W；
B) P dummy storage node of cloud computing storage setting, node are virtually isolated with tenant's permission；
C) distributed node M=W+P of storage system is unified to carry out node index；
D) the subfile store instruction issued is parsed and is executed, by subfile copy random storage to storage child node,
Record position；
E) the subfile download instruction issued is parsed and is executed, read subfile from index position and return to downloading section
Point；
F) supplement of node and rejecting are managed collectively, the update operational order of storage file is managed collectively；
3, the subfile and storage location index encryption/decryption module, management storage index information:
A) after by subfile and storage location index { nk, m } using the public key encryption of user, file registration interface is called to be recorded into
In the file information block of block chain；
B) file registration interface is called to read subfile and storage location index information from the file information block of block chain,
It is decrypted using the private key of user, returns to cleartext information；
4, the file information is registered to the interface module of block chain, carries out the management of the file information block:
A) the file information write-in and more new command are received, is increased and more new record within a block；
B) file transactions recording instruction is received, when file sends and trades, the owner of the staged files information, file and not
Know that index replacement code key is encrypted.
The purpose of the above described specific embodiments of the present invention is use for a better understanding of the present invention, is not constituted
Limiting the scope of the present invention.Any modification made within the spirit and principles in the present invention essence deforms and is equal
Replacement etc., all should belong within scope of protection of the claims of the invention.
Claims (7)
1. a kind of big file safety storage method of block chain, step include:
1) big file is registered in block chain by block chain node users, and storage system is stored by big file declustering and in block chain
The copy of the redundant storage big file in network；
2) big file is split as N block, and redundancy is K parts, and random storage is into M memory node；
3) memory node is the set of block chain node and cloud storage node；
4) user is using public key encryption file block and the index record of storage location into block chain block；
5) user can decrypt file block with private key and storage location indexes, recover after any Node registers block chain
Big file.
2. the big file safety storage method of block chain as described in claim 1, which is characterized in that storage is independently of block chain account
This record storage, the two are not interfere with each other.
3. the big file safety storage method of block chain as described in claim 1, which is characterized in that the method that big file F is split
It is as follows:
1) big file is averagely split into N parts in binary form, wherein N >=1；
2) by K parts of the N one's share of expenses for a joint undertaking file redundancy, namely FN | fn, n=1 ... N } * K=fn1, fn2, fn3 ..., fnK | n=
1,…N }；
3) file index is established for the big file and subfile of fractionation；
4) it is Ψ byte (Bytes), the file when file size is under threshold value Ψ that the fractionation threshold value of big file, which is file size,
Without fractionation (namely N=1), K parts of direct redundancy, every portion all with the public key encryption of user and establishes index.
4. the big file safety storage method of block chain as described in claim 1, which is characterized in that the distribution of the storage system
Formula node constructive method are as follows:
1) each node division of block chain shares memory space, and full chain node number is W；
2) P dummy storage node of cloud computing storage setting, node are virtually isolated with tenant's permission；
3) distributed node M=W+P of storage system is unified to carry out node index.
5. the big file safety storage method of block chain as described in claim 1-4 any one, which is characterized in that using random
Distribution storage algorithm by NK one's share of expenses for a joint undertaking file random storage into M memory node, adopt by subfile and storage location index { nk, m }
After the public key encryption of user, it is recorded into the file information block of block chain.
6. the big file safety storage method of block chain as described in claim 1, which is characterized in that user logs in arbitrary node
Afterwards, the index of big file can be decrypted from block chain with the private key of oneself, so that big file required for restoring, is stored in this
Ground.
7. a kind of big file security storage system of block chain, including file declustering module, memory node management module, subfile and
Storage location index encryption/decryption module, the file information are registered to the interface module of block chain, file access pattern module, and feature exists
In, further include storage destructive test module, the file information block and transaction block synchronization module, file shift module and file more
New module；
The storage destructive test module causes big file subfile in situations such as memory node suspension, cloud storage area damage
In the case that copy damages, copy amount detection is carried out, Active Replication copy is to K parts, to ensure the complete recovery of big file；
The file information block and transaction block synchronization module send message when document transaction occurs in block chain
Synchronic command is to the file information block, the synchronized update that keeps a record；
The file shift module is in transaction document operation, and file ownership changes, document original owner's private key
File and storage location index are decrypted, is indexed with the public key re-encrypted file and storage location of document recipient, and modify text
Part information block record, file are attributed to recipient；
The file update module, for file modification, after deletion, storage system to the change of the redundancy backup of this document, delete
Except operation, while record is modified in the file information block.
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