CN108924092A - Based on block chain can open arbitration distribution cloud storage method and system - Google Patents

Abstract

The invention discloses a block chain-based public arbitration distributed cloud storage method and system, wherein the method includes: formulating a service contract and performing the first user matching, so as to establish the first relationship between the user and the storage service provider One off-chain connection; through the first off-chain connection, a storage contract including storage deposit and storage service fee is established and released to the whole network; data is stored according to the storage contract released to the whole network, and the second time is carried out according to the storage record User matching to establish a second off-chain connection between the user and the storage service provider; establish an off-chain micropayment channel through the second off-chain connection to perform query transactions, and submit the last transaction signature to The entire network for authentication. This method can effectively utilize the local storage space of nodes in the entire network, and smart contracts can regulate the services of the entire network without the need for trusted third-party audit operations, ensuring the fairness of the storage and query process.

Description

Distributed cloud storage method and system for public arbitration based on block chain

technical field

The present invention relates to the technical field of cloud computing security, in particular to a block chain-based distributed cloud storage method and system that can be disclosed and arbitrated.

Background technique

With the advent of the era of big data, the amount of data in the network has shown explosive growth, and its growth rate has exceeded the geometric order. If the generated data is to be stored, a huge network storage capacity is bound to be required. This also puts forward higher requirements for cloud storage technology.

Nowadays, users often use cloud storage services provided by third-party storage providers to store massive amounts of data, which leads to serious centralization problems. In addition, the current third-party-based cloud storage model often requires TTP (Third Trusted Party, trusted third party) to ensure data integrity and availability, which also makes audit operations more centralized. Once the TTP audit is wrong or malicious operations are performed, storage service participants will suffer losses. In contrast, on the one hand, the demand for storage services is very strong, on the other hand, the local storage of a large number of users has not been effectively utilized, and the imbalance between supply and demand is serious. Therefore, building a secure, open, and stable distributed cloud storage system is a major challenge for current cloud storage services.

Therefore, it is particularly important to design a robust and secure scheme that can ensure the correct storage of data. For massive data cloud storage, on the one hand, it is necessary to solve the storage space and integrity problems of massive data, and on the other hand, it is necessary to introduce a decentralized arbitration verification method.

The blockchain was born from Satoshi Nakamoto's Bitcoin. Since 2009, various Bitcoin-like digital currencies based on public blockchains have emerged. Blockchain is essentially a decentralized database, which has the advantages of decentralization, information tamper-proof, openness and transparency, and high robustness. A smart contract is a concept proposed by Nick Szabo in the 1990s. It is a computer program running on a replicable and shared ledger that can process information, receive, store and send value. A smart contract is a digital version of a traditional contract. They are computer programs that run on a blockchain database and can execute themselves when conditions written in their source code are met. Once a smart contract is written, it can be trusted by users, and the terms of the contract cannot be changed, so the contract is immutable.

Contents of the invention

The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

For this reason, an object of the present invention is to propose a blockchain-based public arbitration distributed cloud storage method, which can regulate the service of the entire network through smart contracts without requiring a trusted third party to perform audit operations, and ensure storage and fairness of the inquiry process.

Another object of the present invention is to propose a blockchain-based distributed cloud storage system that can be publicly arbitrated.

In order to achieve the above purpose, an embodiment of the present invention proposes a block chain-based public arbitration distributed cloud storage method, including the following steps: formulate a service contract and perform the first user matching to establish a user and storage service The first off-chain connection between providers; through the first off-chain connection, a storage contract including storage deposit and storage service fee is established and released to the entire network; data is processed according to the storage contract released to the entire network store, and perform a second user match according to the stored records to establish a second off-chain connection between the user and the storage service provider; and establish an off-chain micropayment through the second off-chain connection channel to query transactions, and submit the signature of the last transaction content to the entire network for authentication.

The block chain-based public arbitration distributed cloud storage method of the embodiment of the present invention submits a storage contract including a storage deposit to the miners of the entire network to effectively utilize the local storage space of the nodes of the entire network and establish a standardized off-chain The micropayment channel for transactions and queries has the advantage of being able to standardize the services of the entire network through smart contracts without the need for trusted third-party audit operations, and to ensure the fairness of the storage and query process.

In addition, the blockchain-based public arbitration distributed cloud storage method according to the above-mentioned embodiments of the present invention may also have the following additional technical features:

Furthermore, in an embodiment of the present invention, the formulation of the service contract and the first user matching to establish the first off-chain connection between the user and the storage service provider further include: formulation of the service contract, and transfer the storage deposit to the service contract account address and declare the storage time set by the storage service provider; establish the user and the storage service according to the required service that the user inquires on the blockchain Said first off-chain connection between providers.

Further, in one embodiment of the present invention, establishing a storage contract including a storage deposit and a storage service fee through the first off-chain connection, and releasing the storage contract to the entire network, further includes: Divide the data M to be stored into blocks by the block algorithm to obtain k data blocks of equal size {M1, M2..., Mk}, encrypt each block of data to obtain {C1, C2..., Ck}, and retain the hash of the encrypted data block {Hash(C1), Hash(C2)..., Hash(Ck)} and the corresponding index; send all blocks containing the index and any random challenge value c(c∈[1,k]) to the A storage service provider, and the storage service provider returns a valid storage certificate to the user; if the user passes the verification, the storage contract C is reached according to the storage deposit and the storage service fee and the negotiation is declared Good storage capacity and storage time, and publish the storage contract to the whole network.

Further, in one embodiment of the present invention, the process of establishing an off-chain micropayment channel further includes: assuming that the user locks N·γ to the storage contract account as a query fee; at the time of the first query, According to the γ query fee locked by the user to the storage service provider, record the query fee as γ ₁ , and send data to the user; the storage service provider obtains the total storage deposit transferred to the storage contract Under the premise of , the storage service provider obtains the query fee γ ₁ ; in each query, the accumulated transfer fee γ is signed by the user to the storage service provider, and the remaining transactions are transferred to the user, After receiving the legally signed transaction, send the data to the user; after the query operation is completed, sign the transaction, and send the transaction containing the double signature to the entire network; verify the transaction signature of the miner, if passed , the transaction is accepted and the funds transfer process is complete.

Further, in an embodiment of the present invention, the off-chain data transmission adopts http protocol or IPFS protocol.

In order to achieve the above purpose, another embodiment of the present invention proposes a blockchain-based public arbitration distributed cloud storage system, including: the first matching module, which is used to formulate service contracts and perform the first user matching , to establish the first off-chain connection between the user and the storage service provider; the storage contract establishment module is used to establish a storage contract including storage deposit and storage service fee through the first off-chain connection and publish it to The whole network; the second matching module is used to store data according to the storage contract released to the whole network, and perform a second user matching according to the storage records to establish a relationship between the user and the storage service provider The second off-chain connection; and a micro-payment channel establishment module, which is used to establish an off-chain micro-payment channel through the second off-chain connection to perform query transactions, and submit the signature of the last transaction content to the entire network for authentication.

The open arbitration distributed cloud storage system based on the block chain of the embodiment of the present invention submits a storage contract including a storage deposit to the miners of the entire network to effectively utilize the local storage space of the nodes of the entire network and establish a standardized off-chain The micropayment channel for transactions and queries has the advantage of being able to standardize the services of the entire network through smart contracts without the need for trusted third-party audit operations, and to ensure the fairness of the storage and query process.

In addition, the blockchain-based public arbitration distributed cloud storage system according to the above-mentioned embodiments of the present invention may also have the following additional technical features:

Further, in an embodiment of the present invention, the first matching module is further used to: formulate the service contract, transfer the storage deposit to the service contract account address and declare the storage service provider setting A certain storage time; according to the required service that the user inquires on the block chain, establish the first off-chain connection between the user and the storage service provider.

Further, in one embodiment of the present invention, the storage contract establishment module is further used to: divide the data M to be stored into blocks by a block algorithm to obtain k data blocks {M1, M2..., Mk} of equal size , encrypt each block of data to get {C1, C2..., Ck}, keep the hash {Hash(C1), Hash(C2)..., Hash(Ck)} and the corresponding index of the encrypted data block; All blocks and any random challenge value c(c∈[1,k]) are sent to the storage service provider, and the storage service provider returns a valid storage proof to the user; if the user verifies If passed, the storage contract C is reached according to the storage deposit and the storage service fee, and the negotiated storage amount and storage time are declared, and the storage contract is released to the entire network.

Furthermore, in one embodiment of the present invention, the establishment process of the next micro-payment channel further includes: assuming that the user locks N·γ to the storage contract account as a query fee; at the time of the first query, according to The user locks the γ query fee to the storage service provider, records the query fee as γ ₁ , and sends data to the user; when the storage service provider obtains the total storage deposit transferred to the storage contract Under the premise, the storage service provider obtains the query fee γ ₁ ; in each query, the user signs the accumulative transfer fee γ to the storage service provider, and the remaining transactions transferred to the user, in After receiving the legally signed transaction, send the data to the user; after the query operation is completed, sign the transaction, and send the transaction containing the double signature to the entire network; verify the miner's transaction signature, if passed, The transaction is then accepted and the funds transfer process is complete.

Further, in an embodiment of the present invention, the off-chain data transmission adopts http protocol or IPFS protocol.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and easy to understand from the following description of the embodiments in conjunction with the accompanying drawings, wherein:

Fig. 1 is a flow chart of a blockchain-based publicly arbitrated distributed cloud storage method according to an embodiment of the present invention;

Fig. 2 is a schematic diagram of a data storage process of a public arbitration distributed cloud storage method based on blockchain according to an embodiment of the present invention;

Fig. 3 is a schematic diagram of a data query process based on a block chain-based public arbitration distributed cloud storage method according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of service contract parameters of a blockchain-based publicly arbitrated distributed cloud storage method according to an embodiment of the present invention;

Fig. 5 is a schematic diagram of storing contract parameters based on a block chain-based public arbitration distributed cloud storage method according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of a pseudocode of a blockchain-based public arbitration distributed cloud storage method storage contract according to an embodiment of the present invention;

FIG. 7 is a flow chart of an off-chain micropayment channel based on a block chain-based publicly arbitrated distributed cloud storage method according to an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a blockchain-based public arbitration distributed cloud storage method storage proof according to an embodiment of the present invention;

Fig. 9 is a schematic structural diagram of a blockchain-based public arbitration distributed cloud storage system according to an embodiment of the present invention.

Explanation of reference signs:

In Figure 2, c is the random challenge value sent by User-A to Server-B;

In Figure 3, Restore is the storage record sheet;

In Figure 4, PGserve is the deposit of the depositor, Nserve is the available storage capacity, Tserve is the storage time, and TEsever-i is the contact address of the depositor Server-i;

In Figure 5, PGstore is the total deposit amount that needs to be paid, Tstore is the storage service time, RM is the Merkel tree root of data M; PGcheck is the query fee;

In Figure 7, Nγ is the query fee locked by the user; γ1 is the query fee for the first query of a certain piece of data;

In Figure 8, Nmax is the maximum value of the index, RM is the root of the Merkle tree that stores the data, and c is the user's challenge value for an index.

Detailed ways

Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

The following describes the blockchain-based publicly arbitrable distributed cloud storage method and system proposed according to the embodiments of the present invention with reference to the accompanying drawings. Cloud storage method, first explain the symbols and algorithms:

(1) c represents the random challenge value sent by User-A to Server-B, which corresponds to the index value of a data block;

(2) R _M represents the root of the Merkle tree that stores the data;

(3) pk _A and sk _A are the public-private key pair of User-A, and pk _B and sk _B are the public key pair of Server-B;

(4) Hash(M)→ω,M∈{0,1} ^* means to hash the data M to get ω;

(5) Sig(sk _i ,M)→σ, M ∈ {0, 1} ^* , means to sign M with private key sk _i to get σ;

(6) C-SER represents the content of the service contract, and C-STO represents the content of the storage contract;

(7) ADD _seve-i represents the account address of the service contract created by i, and ADD _store represents the account address of the storage contract;

(8) Nγ represents the query fee locked by User-A to the storage contract, and the query fee for each data block is γ. γ ₁ represents the query fee for querying a piece of data for the first time, if not querying γ ₁ is 0, otherwise it is γ;

(9) PG _serve represents the amount of the service contract account, PG _store represents the total storage deposit that both parties need to transfer to the storage contract, PG _total represents the total amount of the storage contract account, and PG _check represents the query deposit of User-A;

(10) T _serve represents the storage duration declared by the depositor in the service contract, N _serve represents the storage capacity that the depositor can provide, and Price-unit represents the current storage market unit price, PG _serve = T _serve ×N _serve ×Price-unit;

(11) T _store represents the storage duration in the storage contract, and T _cer represents the storage certificate return delay tolerated by the user;

(12) Cer _store-c represents the storage certificate corresponding to the challenge c, which includes the data block content M _c indexed by c and its path to R _M ; Re _store represents the storage record sheet, recording specific data and its corresponding storage.

Fig. 1 is a flow chart of a block chain-based public arbitration distributed cloud storage method according to an embodiment of the present invention.

As shown in Figure 1, the blockchain-based public arbitration distributed cloud storage method includes a data storage stage and a data query stage, wherein the data storage stage includes steps S101 and S102, and the data query stage includes steps S103 and S104, specifically :

In step S101, formulate a service contract and perform the first user matching to establish the first off-chain connection between the user and the storage service provider.

Referring to Figures 2-4, in one embodiment of the present invention, Server-B formulates a service contract C-SER _B . Server-B transfers the service deposit to ADD _seve-B and declares the storage time T _store . T _store is set by Server-B and is fixed during the validity period of the contract. N _serve changes linearly with PG _serve and market storage price Price-unit (when PG _serve decreases or Price-unit increases, N _serve will automatically decrease, and vice versa). User-A queries the required services on the blockchain, and establishes a connection with the corresponding Server-B off the chain.

In step S102, a storage contract including a storage deposit and a storage service fee is established through the first off-chain connection and published to the entire network.

In one embodiment of the present invention, User-A divides the data M to be stored into blocks to obtain k data blocks of equal size {M ₁ , M ₂ ..., M _k }, and divides all blocks, block corresponding indexes and A random challenge value c(c∈[1,k]) is sent to Server-B, and Server-B calculates Cer _store-c and sends it to User-A for verification;

As shown in Figure 5, after passing the verification, User-A formulates the storage contract content Cstore, and calculates the signature Sstore=Sig(sk _A , Hash(Cstore)). Send Cstore and Sstore together to Server-B;

If Server-B agrees to the contract after successful verification, calculate S _store-B = Sig(sk _B , Hash(Cstore)), and publish Cstore, Sstore-A and S _store-B to the network;

Miners verify the contract, including checking the integrity of the contract content and the correctness of the double signature. After the miner verifies that it is valid, the contract is packaged into the block and the service fee for the contract is obtained;

Both parties submit a deposit transfer to the contract address ADD _store . If the deposit is successfully transferred within the specified time T _trans , the contract will take effect, and User-A will record the storage transaction in the Re _store . Otherwise, the transferred deposit will be refunded and the contract will be invalid;

After the T _store arrives, if Server-B has no dishonest storage behavior (that is, Server-B can correctly return the query result every time or store the proof to User-A), the PG _store will be transferred to Server-B, otherwise the PG _store will be transferred to to User-A.

In step S103, the data is stored according to the storage contract released to the whole network, and the second user matching is performed according to the storage records, so as to establish the second off-chain connection between the user and the storage service provider.

In one embodiment of the present invention, User-A obtains the contact address of Server-B according to the Re _store , and establishes an off-chain connection with Server-B. Off-chain data transmission can use http protocol or IPFS protocol.

In step S104, an off-chain micropayment channel is established through the second off-chain connection to perform query transactions, and the last transaction content signature is submitted to the entire network for authentication.

As shown in Figures 6-8, in one embodiment of the present invention, the process of establishing a micropayment channel is as follows:

(1) Suppose User-A locks N·γ to the storage contract account ADD _store as the query fee PG _check ;

(2) During the first query, User-A locks the γ query fee for Server-B (denote this query fee as γ ₁ ), and Server-B sends a copy of data to User-A. Only on the premise that Server-B obtains PG _store , Server-B can obtain γ ₁ , otherwise, the fee will be refunded to User-A after T _store ;

(3) In each subsequent query, User-A signs the cumulative transfer fee γ to Server-B each time, and transfers the rest to User-A. After receiving the legally signed transaction, Server-B sends a copy of the data to User-A. For example, in the second query, transfer γ to Server-B and transfer (N-2)γ to User-A's transaction signature and send it to Server-B; in the third query, transfer 2γ to Server-B And transfer (N-3)γ to User-A's transaction signature and send it to Server-B...in order;

(4) After the query operation is completed, Server-B signs the last transaction and sends the transaction containing the double signature to the entire network;

(5) The miner verifies the transaction signature, and if it passes, the transaction is accepted, and the fund transfer process is completed;

(6) When User-A pays but Server-B does not return a certain data block, User-A submits a storage challenge transaction for Server-B to the entire network, asking Server-B to provide storage for the data block Proof (including the content of the data block and its path to _RM , see Figure 7). If Server-B cannot submit a valid storage certificate to the miners of the entire network within T _cer , γ ₁ will be transferred to User-A after T _{store arrives} ; After arriving, γ1 is transferred to User- _A .

After establishing an off-chain micro-payment channel and performing query transactions, update data. The specific process is as follows:

(1) Under the chain, User-A sends the information required to update the data (index, new data block) and operation instructions (insert, delete, update) on the data to Server-B, and calculates the new Merkle tree root value, and send the value signature to Server-B;

(2) Server-B calculates a new Merkle tree root corresponding to the updated storage structure, compares it with the value provided by User-A, and if they are equal, double-signs the value and returns it;

(3) User-A verifies the correctness of the signature returned by Server-B;

(4) User-A generates an update transaction and submits the new Merkle tree root value, double signature and timestamp to the miners of the entire network;

(5) After the miner passes the verification, the transaction is used as the input of the corresponding storage contract to modify the root value of the Merkle tree of the storage contract.

In addition, in the embodiments of the present invention, the above solutions all adopt a one-to-one specific embodiment, and other embodiments of the present invention can also satisfy the situations of one-to-many, many-to-one and many-to-many.

One-to-many: that is, one user's data is stored to multiple storers. In order to enhance the robustness of the data, the user can use two methods to implement the one-to-many solution, including multiple storage of the entire data or data block storage to different storage spaces, specifically:

Method 1: The user establishes a connection with multiple storages; corresponding to different storages, the user slices the same data and encrypts it with different symmetric encryption keys, and then sends the encrypted data to the storages.

Method 2: The user establishes a connection with multiple storages; the user encodes the data as a whole in the form of erasure codes; the user uses symmetric encryption to encrypt the encoded data blocks, and distributes these data blocks to different storer.

Many-to-one: That is, multiple users correspond to the same stored data, and multiple users can query and update the stored data. This method is actually data sharing in the usual sense. The user completes the storage transaction with the depositor, and then shares the depositor's contact information, its own private key, data hash and index, data decryption method, etc. off-chain with other users trusted by the user.

Many-to-many: it is formed by combining the above-mentioned many-to-one and one-to-many embodiments, which will not be repeated here.

The block chain-based public arbitration distributed cloud storage method of the embodiment of the present invention submits a storage contract including a storage deposit to the miners of the entire network to effectively utilize the local storage space of the nodes of the entire network and establish a standardized off-chain The micropayment channel for transactions and queries has the advantage of being able to standardize the services of the entire network through smart contracts without the need for trusted third-party audit operations, and to ensure the fairness of the storage and query process.

Next, the block chain-based public arbitration distributed cloud storage system proposed according to the embodiment of the present invention will be described with reference to the accompanying drawings.

Fig. 9 is a schematic structural diagram of a blockchain-based public arbitration distributed cloud storage system according to an embodiment of the present invention.

As shown in FIG. 9 , the blockchain-based public arbitration distributed cloud storage system 10 includes: a first matching module 100 , a storage contract establishment module 200 , a second matching module 300 and a micropayment channel establishment module 400 .

Among them, the first matching module 100 is used to formulate a service contract and perform the first user matching to establish the first off-chain connection between the user and the storage service provider. The storage contract establishment module 200 is used to establish a storage contract including storage deposit and storage service fee through the first off-chain connection. The second matching module 300 is used to store data according to the storage contract released to the whole network, and perform a second user matching according to the storage records, so as to establish a second off-chain connection between the user and the storage service provider. The micro-payment channel establishment module 400 is used to establish an off-chain micro-payment channel through the second off-chain connection to perform query transactions, and submit the signature of the last transaction content to the entire network for authentication. The system has services that can regulate the entire network through smart contracts without the need for trusted third-party audit operations, ensuring the fairness of the storage and query process.

It should be noted that the foregoing explanations to the embodiment of the block chain-based public arbitration distributed cloud storage method are also applicable to the block chain-based public arbitration distributed cloud storage system of this embodiment, which will not be repeated here repeat.

Further, in one embodiment of the present invention, the first matching module 100 is further used to: formulate a service contract, transfer the storage deposit to the service contract account address and declare the storage time set by the storage service provider; The required services queried on the blockchain establish the first off-chain connection between the user and the storage service provider.

Further, in one embodiment of the present invention, the storage contract establishment module 200 is further used to: use a block algorithm to block the data M to be stored to obtain k data blocks {M1, M2..., Mk} of equal size, Encrypt each block of data to get {C1, C2..., Ck}, and retain the hash {Hash(C1), Hash(C2)..., Hash(Ck)} of the encrypted data block and the corresponding index; all the blocks containing the index and any random challenge value c(c∈[1, k]) to the storage service provider, and the storage service provider returns a valid storage certificate to the user; Storage contract C declares the negotiated storage amount and storage time, and releases the storage contract to the entire network.

Furthermore, in one embodiment of the present invention, the process of establishing a micro-payment channel further includes: assuming that the user locks N·γ to the storage contract account as a query fee; at the time of the first query, according to the user's lock, the storage service provides The user’s γ query fee, the record query fee is γ ₁ , and the data is sent to the user; on the premise that the storage service provider obtains the total storage deposit transferred to the storage contract, the storage service provider obtains the query fee γ ₁ ; In the query, the accumulated transfer fee γ is signed by the user to the storage service provider, and the remaining transaction is transferred to the user. After receiving the legally signed transaction, the data is sent to the user; after the query operation is completed, the transaction is signed, which will include The double-signed transaction is sent to the entire network; after verifying the miner's transaction signature, if it passes, the transaction is accepted and the fund transfer process is completed.

Further, in one embodiment of the present invention, the off-chain data transmission adopts http protocol or IPFS protocol.

The open arbitration distributed cloud storage system based on the block chain of the embodiment of the present invention submits a storage contract including a storage deposit to the miners of the entire network to effectively utilize the local storage space of the nodes of the entire network and establish a standardized off-chain The micropayment channel for transactions and queries has the advantage of being able to standardize the services of the entire network through smart contracts without the need for trusted third-party audit operations, and to ensure the fairness of the storage and query process.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In the description of this specification, descriptions with reference to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structure, material or characteristic is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without conflicting with each other.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and those skilled in the art can make the above-mentioned The embodiments are subject to changes, modifications, substitutions and variations.

Claims (10)

1. it is a kind of based on block chain can open arbitration distribution cloud storage method, which is characterized in that include the following steps：

It formulates service contract and carries out first time user's matching, with the first time chain established between user and storage service provider Lower connection；

By connecting storage contract of the foundation comprising storage cash pledge and storage service expense under the first time chain and being distributed to the whole network；

Data storage is carried out according to the storage contract for being distributed to the whole network, and is recorded according to storage and carries out second of user Match, to be connected under second of chain establishing between the user and the storage service provider；And

Micropayments channel under chain is established by connecting under second of chain, to carry out inquiry transaction, and by last transaction Content signature is committed to the whole network to be authenticated.

2. it is according to claim 1 based on block chain can open arbitration distribution cloud storage method, which is characterized in that institute It states and formulates service contract and carry out first time user's matching, under the first time chain established between user and storage service provider It connects, further comprises：

The service contract is formulated, and the storage cash pledge is turned into service contract account address and states that the storage service mentions The storage time of donor setting；

The required service inquired on block chain according to the user is established between the user and the storage service provider The first time chain under connect.

3. it is according to claim 2 based on block chain can open arbitration distribution cloud storage method, which is characterized in that institute It states by being connected under the first time chain, establishes the storage contract taken comprising storage cash pledge and storage service, and by the storage Contract is distributed to the whole network, further comprises：

The data block { M1, M2 ..., Mk } of the sizes such as k will be obtained to deposit data M piecemeal by block algorithm, encrypts each block number According to obtaining { C1, C2 ..., Ck }, retain the Hash { Hash (C1), Hash (C2) ..., Hash (Ck) } of encrypted data block and corresponding Index；

All piecemeals containing the index are sent to the storage service with any one random challenge value c (c ∈ [1, k]) to mention Donor, and the storage service provider returns to effective storage and proves to the user；

If the user's checking passes through, the storage and about C are reached according to the storage cash pledge and storage service expense And state the amount of storage and storage time that consult, and the storage contract is distributed to the whole network.

4. it is according to claim 1 based on block chain can open arbitration distribution cloud storage method, which is characterized in that institute It states and establishes micropayments channel flow under chain, further comprise：

Assuming that the user locks N γ to the storage contract account as enquiry fee；

It when inquiring first time, is locked according to the user to the γ enquiry fee of the storage service provider, is looked into described in record Inquiry takes for γ₁, send data to the user；It gets in the storage service provider to total storage that storage contract turns and gives as security Under the premise of gold, the storage service provider obtains the enquiry fee γ₁；

In each inquiry, the cumulative expense γ that transfers accounts is signed to the storage service provider by the user, residue is transferred accounts To the transaction of the user, after receiving the transaction of legitimate signature, the user is sent data to；

It after the completion of operation to be checked, signs to the transaction, sends the whole network for the transaction comprising dual signature；

By verifying miner's trading signature, if passing through, receive the transaction, fund transfer process is completed.

5. it is according to claim 1-4 based on block chain can open arbitration distribution cloud storage method, it is special Sign is that data transmission uses http agreement or IPFS agreement under the chain.

6. it is a kind of based on block chain can open arbitration distribution cloud storage system, which is characterized in that including：

First time matching module, for formulating service contract and carrying out first time user's matching, to establish user and storage service It is connected under first time chain between supplier；

Storage contract establishes module, for establishing and taking comprising storage cash pledge and storage service by connecting under the first time chain Storage contract and be distributed to the whole network；

Second of matching module for carrying out data storage according to the storage contract for being distributed to the whole network, and is remembered according to storage Record carries out second of user's matching, to connect under second of chain establishing between the user and the storage service provider； And

Micropayments path setup module, for establishing micropayments channel under chain by connection under second of chain, to be looked into Transaction is ask, and last transaction content signature is committed to the whole network to authenticate.

7. it is according to claim 6 based on block chain can open arbitration distribution cloud storage system, which is characterized in that institute First time matching module is stated, is further used for：

The service contract is formulated, and the storage cash pledge is turned into service contract account address and states that the storage service mentions The storage time of donor setting；

The required service inquired on block chain according to the user, is established between the user and the storage service provider The first time chain under connect.

8. it is according to claim 7 based on block chain can open arbitration distribution cloud storage system, which is characterized in that institute It states storage contract and establishes module, be further used for：

The data block { M1, M2 ..., Mk } of the sizes such as k will be obtained to deposit data M piecemeal by block algorithm, encrypts each block number According to obtaining { C1, C2 ..., Ck }, retain the Hash { Hash (C1), Hash (C2) ..., Hash (Ck) } of encrypted data block and corresponding Index；

All piecemeals containing the index are sent to the storage service with any one random challenge value c (c ∈ [1, k]) to mention Donor, and the storage service provider returns to effective storage and proves to the user；

If the user's checking passes through, the storage and about C are reached according to the storage cash pledge and storage service expense And state the amount of storage and storage time that consult, and the storage contract is distributed to the whole network.

9. it is according to claim 6 based on block chain can open arbitration distribution cloud storage system, which is characterized in that institute Lower micropayments Path Setup process is stated, further comprises：

Assuming that the user locks N γ to the storage contract account as enquiry fee；

It when inquiring first time, is locked according to the user to the γ enquiry fee of the storage service provider, is looked into described in record Inquiry takes for γ₁, send data to the user；It gets in the storage service provider to total storage that storage contract turns and gives as security Under the premise of gold, the storage service provider obtains the enquiry fee γ₁；

In each inquiry, the cumulative expense γ that transfers accounts is signed to the storage service provider by the user, residue is transferred accounts To the transaction of the user, after receiving the transaction of legitimate signature, the user is sent data to；

It after the completion of operation to be checked, signs to the transaction, sends the whole network for the transaction comprising dual signature；

By verifying miner's trading signature, if passing through, receive the transaction, fund transfer process is completed.

10. it is according to claim 6 based on block chain can open arbitration distribution cloud storage system, which is characterized in that Data transmission uses http agreement or IPFS agreement under the chain.