WO2019114096A1

WO2019114096A1 - Blockchain-based storage system

Info

Publication number: WO2019114096A1
Application number: PCT/CN2018/073676
Authority: WO
Inventors: 尚小朋
Original assignee: 成都链一网络科技有限公司
Priority date: 2017-12-15
Filing date: 2018-01-22
Publication date: 2019-06-20
Also published as: CN108076148A

Abstract

Disclosed is a blockchain-based storage system, comprising: an application layer, used for an uploader to generate a upload request, a storer to generate a storage request and a downloader to generate a download request, and for segmenting a file to be stored into a plurality of file fragments according to the upload request; a blockchain network, used for storing the upload request, the download request and meta-information of the file, and for performing permission verification on the downloader initiating the download request; a distributed storage network, used for storing the file fragments, and for performing permission verification on the storer during file uploading and performing permission verification on the downloader during file downloading. The present invention uses blockchain technology to store meta-information of a file in a blockchain network, so that the meta-information cannot be tampered with, in order to significantly increase security. The present invention also combines the stability provided by an eMule network to implement stable and secure cloud storage.

Description

Blockchain based storage system

Technical field

The present invention relates to the field of data storage technologies, and in particular, to a blockchain-based storage system.

Background technique

Cloud storage is a new concept extended and developed in the concept of cloud computing. It is an emerging network storage technology that refers to functions such as cluster applications, network technologies or distributed file systems. A large number of different types of storage devices work together through application software to jointly provide a system for data storage and service access functions.

When the core of computing and processing of cloud computing systems is the storage and management of large amounts of data, cloud computing systems need to be configured with a large number of storage devices, then the cloud computing system is transformed into a cloud storage system, so cloud storage is a data storage system. And management as the core of the cloud computing system. Simply put, cloud storage is an emerging solution for putting storage resources on the cloud for people to access. Users can easily access data at any time, anywhere, by connecting to the cloud via any networkable device.

Existing cloud storage relies on third-party large-scale storage to transmit and store data, such as 360 cloud disk, Baidu network disk, etc. These large-scale storage stores have all data backup and all user information, which is limited by the centralized architecture. Very vulnerable to a variety of security threats.

technical problem

Existing cloud storage relies on third-party large storage vendors to transfer and store data. These large storage stores have full data backup and all user information, and are limited to a centralized architecture, which is very vulnerable to various security threats.

The object of the present invention is to overcome the deficiencies of the prior art and provide a blockchain-based storage system, which realizes distributed storage of files and improves file storage security.

Technical solution

The object of the present invention is achieved by the following technical solutions: A blockchain-based storage system, including:

An application layer, configured to generate an upload request by the uploader, generate a storage request by the store, and generate a download request by the downloader, and divide the file to be stored into a plurality of file fragments according to the upload request;

a blockchain network, configured to store meta-information of the upload request, the download request, and the file, and to perform permission verification on the downloader that initiates the download request;

The distributed storage network is configured to store the file fragmentation, and perform permission verification on the storage file when the file is uploaded, and perform permission verification on the downloader when the file is downloaded.

Preferably, the distributed storage network is a Kad distributed storage network.

Preferably, the upload request includes a split quantity of the file, a backup quantity of the file, a file description, a public key of the uploader, an account name of the uploader, an uploader ID, and a file ID, and the storage request includes an account of the storeer. Name, file ID, and file fragment ID, the download request including the downloader's account name and file ID.

Preferably, the meta information of the file includes fragmentation information of the file, an uploader's public key, and a store ID.

Preferably, the blockchain network is a blockchain network supporting smart contracts.

Preferably, the blockchain network includes:

The upload request initiation interface is used by the uploader to initiate an upload request for storing the file to the distributed storage network;

The upload request viewing interface is used by the storage device to view all upload requests existing in the blockchain network;

The storage request initiation interface is used by the storage device to initiate a storage request for storing a file fragment;

a storage request viewing interface for the uploader to view a storage request related to the file to be uploaded by the uploader;

The download interface is allowed to grant the storage permission of a file fragment to the storage;

The storage completion declaration interface is used by the storage device to initiate a statement that the storage of a file is completed;

a storage completion declaration viewing interface for listing storage completion declarations associated with a specified file that occur in the blockchain network;

Confirmation of the storage claim interface for the uploader to initiate a statement that the confirmed store has completed the storage of a file fragment;

An authentication interface for performing download permission authentication;

The download request interface is used by the downloader to initiate a request to obtain access to a file.

Preferably, the upload request initiation interface is used to initiate a transaction of an upload interface that invokes a file upload contract, and the upload checker creates an upload request record in the blockchain network after the check is verified;

The storage request interface is configured to initiate a transaction of a storage interface that invokes a file uploading contract, and the storage checker creates a storage request record in the blockchain network after the verification is correct;

The download request interface is configured to initiate a transaction of an acquisition interface that invokes a file upload contract, and the contract determines whether the downloader is allowed to access the file according to an authentication condition set by the uploader, and if so, in the blockchain network Create an access permission record for the downloader.

Preferably, the storage is performed between the store and the uploader, and between the store and the downloader.

Beneficial effect

(1) The invention realizes distributed storage of files, and any node does not have a complete backup of the entire file, thereby improving the security of the file;

(2) The important information such as the metadata of the file is stored in the blockchain through the smart contract verification. Since the data stored in the blockchain cannot be tampered with, the important information can be well protected;

(3) Each user can be either a storage demand side or a storage provider, which can effectively improve the utilization of idle storage resources of the network, and also bring corresponding benefits to users who provide storage resources;

(4) The present invention is developed based on the underlying layer of the eMule, and the architecture designed on the basis of a proven reliable network has the same advantages. At the same time, the present invention is distributed due to point-to-point distributed file analysis during eMule. Network storage, its essential purpose is different from eMule. Moreover, the present invention uses blockchain technology to store meta-information of files in a blockchain network, and saves meta-information of files in the form of distributed ledgers so that they cannot be Tampering, greatly improving security, combined with the stability provided by the eDonkey network, to achieve stable and secure cloud storage;

(5) In the present invention, multiple verification is performed at the time of file downloading, which further improves security.

DRAWINGS

Figure 1 is a schematic block diagram of the present invention.

Embodiments of the invention

The technical solutions of the present invention will be described clearly and completely in combination with the embodiments. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without any inventive effort are within the scope of the present invention.

Explanation of terms:

Blockchain: A chained data structure that combines data blocks in sequential order in chronological order, and cryptographically guaranteed non-tamperable and unforgeable distributed ledgers.

Smart Contract: A set of commitments defined in digital form, including agreements where contract participants can execute these commitments. From a procedural perspective, a smart contract is a programming language programmed on a blockchain that triggers related operations when certain specified conditions are met.

Referring to FIG. 1, the embodiment provides a blockchain-based storage system: a blockchain-based storage system includes an application layer, a blockchain network, and a distributed storage network.

The application layer is configured to generate an upload request by the uploader, generate a storage request by the store, and generate a download request by the downloader, and divide the file to be stored into a plurality of file fragments according to the upload request.

The uploading request includes a split quantity of the file, a backup quantity of the file, a file description, a public key of the uploader, an account name of the uploader, an uploader ID, and a file ID, and may further include an authentication condition of the downloader; The storage request includes a storage person's account name, a file ID, and a file shard ID; the download request includes a downloader's account name and file ID.

The blockchain network is configured to store meta-information of the upload request, the download request, and the file, and to perform permission verification on the downloader that initiates the download request.

The meta information of the file includes the fragmentation information of the file, the uploader's public key, and the store ID. The blockchain network is a blockchain network that supports smart contracts.

The blockchain network includes an upload request initiation interface, an upload request viewing interface, a storage request initiation interface, a storage request viewing interface, a permission download interface, a storage completion declaration interface, a storage completion declaration viewing interface, a confirmation storage declaration interface, and an authentication interface. And the download request interface.

The upload request initiation interface (store_file_to_network) is used by the uploader to initiate an upload request for storing the file to the distributed storage network; in some embodiments, the implementation process is: initiating an upload interface of a file upload (File_Upload) contract. Transaction, the contract is verified to create an upload request for the uploader in the blockchain network (Upload Request) record.

The upload request viewing interface (blockchain_get_upload_requests) is used by the storage device to view all upload requests existing in the blockchain network.

The storage request initiation interface (store_file_piece) is used by the storage device to initiate a storage request for storing a file fragment; in some embodiments, the implementation process is: initiating a storage (Store) interface of a file upload (File_Upload) contract. Transaction, the contract is verified to create a storage request for the store in the blockchain network (Store) Request) record.

The storage request viewing interface (wallet_list_store_request_for_my_file) is used by the uploader to view a storage request related to the file to be uploaded by the uploader; in some embodiments, the implementation process is: taking the relevant storage request from the blockchain network according to the upload request. The interface queries the data in the blockchain network according to the file fragment ID, and lists related storage request information.

The permission download interface (wallet_allow_store_request) is used to grant a storage permission of a file fragment to a storage; in some embodiments, the implementation process is: recording a permission storage request in the blockchain network, so that the download is performed. Can be passed when authenticating.

The storage completion declaration interface (declare_piece_saved) is used by the store to initiate a statement that a certain file fragment storage has been completed; in some embodiments, the implementation process is: initiating a transaction in which the specified account has completed a specific The declaration of file shard storage.

The storage completion declaration viewing interface (blockchain_list_file_save_declare) is used to list the storage completion declarations related to the specified file appearing in the blockchain network.

The confirmation storage declaration interface (confirm_piece_saved) is used by the uploader to initiate a statement that the confirmed storage person completes storage of a certain file fragment;

The authentication interface (download_validation) is configured to perform download permission identification, and determine whether the storage or downloader has the right to download the corresponding file fragment.

The download request interface (get_file_access) is used by the downloader to initiate a request for obtaining access to a file; in some embodiments, the implementation process is: initiating a transaction of an acquisition interface that invokes a file upload contract, the contract is based on the uploader The set authentication condition determines whether the downloader is allowed to access the file, and if so, creates an access permission record for the downloader in the blockchain network.

The distributed storage network is a Kad distributed storage network.

The uploader, the storeer, and the downloader are all nodes of the distributed storage network, and are transferred between the store and the uploader, and between the store and the downloader.

The uploading and downloading process of the storage system in this embodiment is:

S1. The uploader calls the upload request initiation interface (store_file_to_network) to generate an upload request, and records the upload request in the smart contract of the blockchain network; the file is divided according to the number of splits and the number of backups in the upload request Multiple file fragments. The upload request includes a split number of the file, a backup quantity of the file, a willingness to pay, a file description, a public key of the uploader, an account name of the uploader, an uploader ID, and a file ID, and the file ID is The hash value of the file is composed of the public key of the uploader.

S2. The storeer calls the upload request viewing interface of the blockchain network (blockchain_get__upload_requests) to view the uploader's upload request. The storage request includes an account name, a file ID, and a file fragment ID of the storage; the file ID is composed of a hash value of the file and a public key of the uploader, and the file fragment ID is divided by the file The hash value of the slice is composed of the public key of the uploader.

S3. After seeing the upload request, the storeer combines the hash value of the file with the uploader's public key to form a file ID, and generates a storage request by storing the request initiation interface (store_file_piece), stating that he wants to store the file. Which files are fragmented.

S4. The uploader calls the storage request viewing interface of the blockchain network (wallet_list_store_request_for_my_file) to view the storage request of the storage.

S5. The uploader invokes the allowable download interface (wallet_allow_store_request) of the blockchain network to allow the store to store the corresponding file fragment (ie, allows the store to download the corresponding file fragment).

S6. The storage device sends a request for downloading the corresponding file fragment to the uploader's eMule. After receiving the request, the uploader's eMule calls the authentication interface (download_validation) of the blockchain network to verify whether the storage is allowed to be downloaded. If allowed, the store's eMule downloads the corresponding file fragment from the uploader's eMule.

S7. After the storage of the storage device is completed, the storage device calls the storage completion declaration interface (declare_piece_saved) of the blockchain network, and writes the state of "the file is downloaded and completed" on the blockchain.

S8. The uploader calls the storage completion declaration view interface (blockchain_list_file_save_declare) of the blockchain network to query the storage state information of the file to be uploaded.

S9. After the uploader sees that a file fragment of the file has been stored, the caller chain network confirms the storage declaration interface (confirm_piece_saved), and writes "the file fragment has been stored" on the blockchain network. status. When all the file fragments of the file are downloaded by the storage, the storage of the file is completed.

Operation: File Download

S10. The downloader views the files that have been confirmed to be stored from the blockchain network.

S11. The downloader calls the download request interface (get_file_access) of the blockchain network to initiate a download request, and the download request interface invokes an access interface (Access) of the file upload (File_Upload) contract, and the contract is based on an authentication contract set by the uploader of the file. Determine if the downloader should be permitted to access the file, and if so, create an access permission record for the downloader in the blockchain network.

S12. The downloader's eMule sends the file download request of each file fragment to the corresponding storage device. After receiving the download request, the storage device's eMule calls the authentication interface (download_validation) of the blockchain network to verify whether the download is allowed. The file is downloaded, and if so, the downloader's power is downloaded from the memory of the store.

S13. After downloading all the file fragments of the file from the storage, the downloader assembles all the files into a complete file, and the download process is completed.

The above is only a preferred embodiment of the present invention, and it should be understood that the present invention is not limited to the forms disclosed herein, and is not to be construed as being limited to the other embodiments, but may be used in various other combinations, modifications and environments. Modifications can be made by the techniques or knowledge of the above teachings or related art within the scope of the teachings herein. All changes and modifications made by those skilled in the art are intended to be within the scope of the appended claims.

Claims

A blockchain-based storage system, comprising:

An application layer, configured to generate an upload request by the uploader, generate a storage request by the store, and generate a download request by the downloader, and divide the file to be stored into a plurality of file fragments according to the upload request;

a blockchain network, configured to store meta-information of the upload request, the download request, and the file, and to perform permission verification on the downloader that initiates the download request;

The distributed storage network is configured to store the file fragmentation, and perform permission verification on the storage file when the file is uploaded, and perform permission verification on the downloader when the file is downloaded.
The blockchain-based storage system of claim 1, wherein the distributed storage network is a Kad distributed storage network.
The blockchain-based storage system according to claim 1, wherein the upload request includes a split number of files, a backup number of files, a file description, an uploader's public key, an uploader's account name, The uploader ID and the file ID, the storage request including the account name, the file ID, and the file fragment ID of the store, the download request including the account name and file ID of the downloader.
The blockchain-based storage system according to claim 1, wherein the meta information of the file includes fragmentation information of the file, an uploader's public key, and a store ID.
The blockchain based storage system of claim 1 wherein said blockchain network is a blockchain network supporting smart contracts.
The blockchain-based storage system of claim 1, wherein the blockchain network comprises:

The upload request initiation interface is used by the uploader to initiate an upload request for storing the file to the distributed storage network;

The upload request viewing interface is used by the storage device to view all upload requests existing in the blockchain network;

The storage request initiation interface is used by the storage device to initiate a storage request for storing a file fragment;

a storage request viewing interface for the uploader to view a storage request related to the file to be uploaded by the uploader;

The download interface is allowed to grant the storage permission of a file fragment to the storage;

The storage completion declaration interface is used by the storage device to initiate a statement that the storage of a file is completed;

a storage completion declaration viewing interface for listing storage completion declarations associated with a specified file that occur in the blockchain network;

Confirmation of the storage claim interface for the uploader to initiate a statement that the confirmed store has completed the storage of a file fragment;

An authentication interface for performing download permission authentication;

The download request interface is used by the downloader to initiate a request to obtain access to a file.
The blockchain-based storage system according to claim 6, wherein the upload request initiation interface is configured to initiate a transaction of an upload interface that invokes a file upload contract, and the contract is verified to be an uploader in the blockchain. Create an upload request record in the network;

The storage request interface is configured to initiate a transaction of a storage interface that invokes a file uploading contract, and the storage checker creates a storage request record in the blockchain network after the verification is correct;

The download request interface is configured to initiate a transaction of an acquisition interface that invokes a file upload contract, and the contract determines whether the downloader is allowed to access the file according to an authentication condition set by the uploader, and if so, in the blockchain network Create an access permission record for the downloader.
The blockchain-based storage system according to claim 1, wherein the storage is performed between the store and the uploader, and between the store and the downloader.