CN109831527B - File processing method, user side, server and readable storage medium - Google Patents
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Abstract
本发明提供一种文件处理方法，应用于第一用户端，包括：在确认初次用户注册及身份验证通过后，生成互相配对的公钥与私钥，其中，第一用户端将所述私钥本地保存，以及DAPP将第一用户端上传的公钥通过预设Fabric节点登记到Fabric网络；当检测到文件上传信号时，获取待上传文件，并获取公钥；使用公钥加密待上传文件，并将得到的第一加密文件上传至DAPP；DAPP将第一加密文件拆分成若干文件块，并将文件块存储至IPFS网络中的IPFS存储节点；以及，DAPP将存储文件块的IPFS存储节点返回的节点地址存储至预设存储位置。本发明还提供了一种用户端、服务器及可读存储介质。本发明旨在提供一种安全可信且易于实现的去中心化数据存储技术方案。
The present invention provides a file processing method, which is applied to a first user terminal, comprising: after confirming that the initial user registration and identity verification are passed, generating a paired public key and a private key, wherein the first user terminal uses the private key to Save locally, and the DAPP registers the public key uploaded by the first client to the Fabric network through the preset Fabric node; when the file upload signal is detected, the file to be uploaded is obtained, and the public key is obtained; the file to be uploaded is encrypted using the public key, and upload the obtained first encrypted file to the DAPP; the DAPP splits the first encrypted file into several file blocks, and stores the file blocks to the IPFS storage node in the IPFS network; and, the DAPP stores the IPFS storage node of the file block. The returned node address is stored to the preset memory location. The present invention also provides a client, a server and a readable storage medium. The present invention aims to provide a safe, reliable and easy-to-implement decentralized data storage technical solution.
Description
Technical Field
The present invention relates to the field of data processing technologies, and in particular, to a file processing method, a client, a server, and a readable storage medium.
Background
The cloud storage technology is a centralized storage technology, and has the defect of risk of deletion by mistake. In recent years, the mistaken deletion events of data on the cloud are endless, and the reasons of the events are closely related to the manual intervention in the existing cloud storage technology. In addition, data are stored in a fixed cloud position, and certain data leakage risks also exist.
Aiming at the defects of the centralized cloud storage technology, the decentralized storage technology and the block chain technology can provide an improved data storage solution. Among them, IPFS (Inter planet File System) is a common decentralized storage technology, which is a network transmission protocol aiming at creating persistent and distributed storage and shared files, so there is no risk of false deletion and leakage. However, there is a possibility of payment behind the IPFS public network, and in addition, IPFS currently has some policy face risks and is therefore not recognized for a while. While Fabric is a block chain technology suitable for a federation chain, Fabric only supports data storage less than 99M by default, and the Fabric's full-node redundant storage mode consumes a large amount of cost, so that it is difficult to implement storage of mass data.
Therefore, how to provide a safe, reliable and easy-to-implement decentralized data storage technical scheme has become a problem to be solved.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention mainly aims to provide a file processing method, a user side, a server and a readable storage medium, and aims to provide a safe, reliable and easily-realized decentralized data storage technical scheme.
In order to achieve the above object, the present invention provides a file processing method, which is applied to a first user side, wherein the first user side is connected to a server, the server is deployed with a distributed application program DAPP, and a preset interface of the DAPP is respectively connected to a preset Fabric node in a distributed accounting network Fabric and a preset IPFS storage node in an interplanetary file system IPFS network; the method comprises the following steps:
after confirming that the initial user registration and identity authentication pass, generating a public key and a private key which are matched with each other, wherein the private key is locally stored by the first user side, and the public key uploaded by the first user side is registered to a Fabric network by the DAPP through a preset Fabric node;
when a file uploading signal is detected, acquiring a file to be uploaded and acquiring the public key;
encrypting the file to be uploaded by using the public key to obtain a first encrypted file, and uploading the first encrypted file to the DAPP;
the DAPP splits the first encrypted file into a plurality of file blocks, and stores the file blocks to an IPFS storage node in the IPFS network; and the DAPP stores the node address returned by the IPFS storage node storing the file block to a preset storage position.
Preferably, after the step of storing the node address returned by the IPFS storage node storing the file block to the preset storage location, the DAPP further includes:
when a file downloading signal is detected, sending a first file downloading request to the DAPP; the DAPP determines a node address of a first IPFS storage node corresponding to a file to be downloaded according to the first file downloading request, and sends a first file block downloading request to the first IPFS storage node according to the node address of the first IPFS storage node; the DAPP assembles the returned file blocks corresponding to the first IPFS storage node;
and decrypting the assembled file returned by the DAPP through the private key to obtain the file to be downloaded.
Preferably, after the step of storing the node address returned by the IPFS storage node in the preset storage location, the DAPP further includes:
when the file sharing signal is detected, sending a second file downloading request to the DAPP;
the DAPP determines a node address of a second IPFS storage node corresponding to a file to be downloaded according to the second file downloading request, and sends a second file block downloading request to the second IPFS storage node according to the node address of the second IPFS storage node; the DAPP assembles the returned file blocks corresponding to the second IPFS storage node;
decrypting the assembled file returned by the DAPP through the private key to obtain a shared file;
acquiring a target user public key corresponding to the second user end;
encrypting the shared file through the target user public key to obtain a second encrypted file;
uploading the second encrypted file to the DAPP;
the DAPP stores a second encrypted file to a third IPFS storage node based on a second preset storage mode, and sends a node address of the third IPFS storage node to a second user end; the second user side acquires a second encrypted file from the third IPFS storage node through the node address of the third IPFS storage node, and decrypts and displays the second encrypted file through a target user private key locally stored in the second user side; and the second user terminal cleans the node address of the third IPFS storage node after destroying the second encrypted file.
In addition, in order to achieve the above object, the present invention further provides a file processing method, which is applied to a server, where the server deploys a distributed application program DAPP, a preset interface of the DAPP is respectively connected to a preset Fabric node in a distributed accounting network Fabric and a preset IPFS storage node in an interplanetary file system IPFS network, and the server is connected to a first user end; the method comprises the following steps:
when a first encrypted file uploaded by a first user side is received, splitting the first encrypted file into a plurality of file blocks;
after confirming that the initial user registration and identity authentication pass, the first user terminal generates a public key and a private key which are paired with each other; the private key is locally stored by the first user side, and the DAPP registers the public key uploaded by the first user side to a Fabric network through a preset Fabric node; when a file uploading signal is detected, the first user side obtains a file to be uploaded and obtains the public key; the first user terminal encrypts the file to be uploaded by using the public key to obtain a first encrypted file;
storing the file block to an IPFS storage node in an IPFS network;
and storing the node address returned by the IPFS storage node storing the file block to a preset storage position.
Preferably, after the step of storing the node address returned by the IPFS storage node storing the file block to the preset storage location, the method further includes:
when a first file downloading request sent by a first user terminal is received, determining a node address of a first IPFS storage node corresponding to a file to be downloaded according to the first file downloading request;
sending a first file block downloading request to a first IPFS storage node according to the node address of the first IPFS storage node;
assembling the returned file blocks corresponding to the first IPFS storage node;
and the first user terminal decrypts the assembled file returned by the DAPP through the private key to obtain the file to be downloaded.
Preferably, after the step of storing the node address returned by the IPFS storage node storing the file block to the preset storage location, the method further includes:
when a second file downloading request sent by a first user terminal is received, determining a node address of a second IPFS storage node corresponding to a file to be downloaded according to the second file downloading request, and sending a second file block downloading request to the second IPFS storage node according to the node address of the second IPFS storage node;
assembling the returned file blocks corresponding to the second IPFS storage node, and returning the assembled file to the first user terminal;
the first user terminal decrypts the assembled file through the private key to obtain a shared file; acquiring a target user public key corresponding to the second user end; the first user terminal encrypts the shared file through the target user public key to obtain a second encrypted file;
when a second encrypted file uploaded by a first user side is received, storing the second encrypted file to a third IPFS storage node based on a second preset storage mode, and sending a node address of the third IPFS storage node to a second user side;
the second user side acquires a second encrypted file from the third IPFS storage node through the node address of the third IPFS storage node, decrypts the second encrypted file through a target user private key locally stored in the second user side, and displays the second encrypted file; and the second user terminal cleans the node address of the third IPFS storage node after destroying the second encrypted file.
In addition, to achieve the above object, the present invention further provides a ue, including: a memory, a processor and a file processing program stored on the memory and executable on the processor, the file processing program when executed by the processor implementing the steps of the file processing method as described above.
In addition, to achieve the above object, the present invention also provides a readable storage medium having stored thereon a file processing program, which when executed by a processor, implements the steps of the file processing method as described above.
In addition, to achieve the above object, the present invention also provides a server, including: a memory, a processor and a file processing program stored on the memory and executable on the processor, the file processing program when executed by the processor implementing the steps of the file processing method as described above.
In addition, to achieve the above object, the present invention also provides a readable storage medium having stored thereon a file processing program, which when executed by a processor, implements the steps of the file processing method as described above.
The embodiment of the invention provides a file processing method, a user side, a server and a readable storage medium, wherein a public key in a public and private key pair generated by a first user side is registered to a Fabric network through DAPP (digital Address protocol) so as to encrypt a target file uploaded by the first user side before uploading, and the data security of the target file and the encrypted transmission of data are ensured. In addition, the encrypted target file is divided into a plurality of file blocks by the DAPP, the file blocks are stored in different IPFS storage nodes, and the node addresses returned by the IPFS storage nodes are stored by the DAPP for downloading the file blocks. The method and the device realize fragmentation and decentralized storage, and any storage party does not store a complete copy, thereby ensuring the security of file storage. Meanwhile, the data chaining of the file uploading behavior realizes the traceability of the file uploading behavior, thereby improving the data security of the file. Thus, a trusted decentralized storage platform is built by using IPFS and Fabric technologies in conjunction with a trusted enterprise server.
Drawings
FIG. 1 is a schematic flow chart diagram illustrating a document processing method according to a first embodiment of the present invention;
FIG. 2 is a schematic diagram of a system architecture related to the file processing method of the present invention;
FIG. 3 is a flowchart illustrating a user registration implementation in a first embodiment of a file processing method according to the present invention;
FIG. 4 is a flowchart illustrating a file uploading implementation in the file processing method according to the present invention;
FIG. 5 is a flowchart illustrating a second embodiment of a document processing method according to the present invention;
FIG. 6 is a flowchart illustrating a file downloading implementation in the file processing method according to the present invention;
FIG. 7 is a flowchart illustrating a document processing method according to a third embodiment of the present invention;
FIG. 8 is a flowchart of a file sharing implementation in the file processing method of the present invention;
FIG. 9 is a flowchart illustrating a fourth exemplary embodiment of a document processing method according to the present invention;
FIG. 10 is a flowchart illustrating a fifth exemplary embodiment of a document processing method according to the present invention;
FIG. 11 is a flowchart illustrating a sixth embodiment of a file processing method according to the present invention.
The objects, features and advantages of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
First, the following definitions or explanations are given for some terms involved in the present invention.
DAPP: DAPP is an abbreviation for Decentralized Application, meaning distributed applications, applications built on a blockchain architecture. The most obvious difference between it and the traditional application program APP: the DAPP runs on a decentralized network, i.e. a blockchain network. The DAPP can be completely controlled without a centralized node in the network; the APP needs to request a certain server to obtain data, process data, etc.
Fabric: a block chain framework is one of project members of the super account book and belongs to a distributed intelligent contract platform.
IPFS: the abbreviation of internet File System, the InterPlanetary File System, is a network transport protocol aimed at creating persistent and distributed storage and sharing of files. It is a content addressable hypermedia distribution protocol. The nodes in the IPFS network will constitute a distributed file system.
And (3) node: the communication entity of the block chain, the node, is a logical concept, and different types of nodes can run on the same physical server. The nodes may be deployed on a cloud server or locally.
MySQL: a relational database management system.
The invention provides a file processing method.
Referring to fig. 1, fig. 1 is a schematic flow chart of a file processing method according to a first embodiment of the present invention. In this embodiment, the method is applied to a first user side, the first user side is connected to the server, the server is deployed with a distributed application program DAPP, and a preset interface of the DAPP is respectively connected to a preset Fabric node in a distributed accounting network Fabric and a preset IPFS storage node in an interplanetary file system IPFS network;
the file processing method may be specifically implemented based on the system architecture shown in fig. 2. More specifically, servers of different trusted authorities (e.g., S1, S2, S3 in fig. 2) deploy corresponding DAPPs (e.g., DAPP1, DAPP2, DAPP3 in fig. 1); user end (e.g. M in fig. 1)A、MB、MC、MD) And connecting with a server of the trusted authority by running a specific mobile terminal application program. The user side can be various mobile intelligent devices such as a smart phone and a tablet computer.
In addition, a Fabric distributed accounting network comprising a plurality of Fabric nodes is built based on the existing Fabric technology. The interconnection relationship of different Fabric nodes on the Fabric distributed accounting network is not limited, such as point-to-point connection. And building an IPFS network comprising a plurality of IPFS storage nodes based on the existing IPFS technology.
And the servers of different trusted authorities are connected with a certain Fabric node or a certain IPFS storage node through the interface of the correspondingly deployed DAPP, so that a federation chain based on a Fabric distributed accounting network and an IPFS network is constructed. For example, the server S1 of trusted authority A is connected with Fabric node 1 and IPFS storage node 1 through DAPP1, and user end M of user AAThe mobile terminal application program is operated to connect with the server S1 for data transmission and interaction. In addition, the DAPP interface can also access the Fabric distributed accounting network or the IPFS network for data transmission and communication connection.
The document processing method of the present invention will be described in detail below. Wherein, as shown in fig. 1, the method comprises:
step S10, after confirming that the first user registration and identity verification pass, generating a public key and a private key which are paired with each other, wherein the private key is locally stored by the first user side, and the public key uploaded by the first user side is registered to the Fabric network through a preset Fabric node by the DAPP;
referring to fig. 3, in a specific implementation, if the first user terminal initially runs the related mobile application, the first user terminal needs to perform basic information filling and user identity authentication. The user basic information may be a name, an identification number, a mobile phone number, or the like of the user. The user identity authentication can be performed through the short message authentication code, or other identity authentication modes are adopted. After the first user side confirms that the first user registration and the identity authentication pass, at least one pair of a public key and a private key which are matched with each other is generated; and the generation mode of the public and private key pair is not limited.
Then, the first user end locally stores the generated private key and uploads the generated public key to the DAPP; the DAPP interface is connected with the preset Fabric node so as to register the public key uploaded by the first user end to the Fabric network through the preset Fabric node. Taking trusted authority a in fig. 1 as an example, user a uploads the generated public key to DAPP1 deployed by server S1, and DAPP1 uploads the public key to associated Fabric node 1 through a specific data interface, so as to register the public key on the Fabric distributed accounting network (i.e., blockchain) and generate a corresponding block. Meanwhile, the user A directly stores the generated private key in a local storage area of the user A.
Step S11, when a file uploading signal is detected, acquiring a file to be uploaded and acquiring the public key;
when a user needs to upload a certain file for storage, the first user obtains the file to be uploaded (such as the file/data uploaded to the application program of the mobile terminal), and sends a public key obtaining instruction to the DAPP, so that the DAPP is connected with the Fabric network through a preset Fabric node, and the DAPP obtains the public key registered in the Fabric network and sends the public key to the first user.
Step S12, encrypting the file to be uploaded by using the public key to obtain a first encrypted file, and uploading the first encrypted file to the DAPP;
referring to fig. 4, the file to be uploaded is encrypted by using a public key, preferably by using an asymmetric encryption algorithm, so as to improve the encryption level of the file.
The DAPP splits the first encrypted file into a plurality of file blocks, and stores the file blocks to an IPFS storage node in the IPFS network; and the DAPP stores the node address returned by the IPFS storage node storing the file block to a preset storage position.
The DAPP can split the first encrypted file according to the capacity of the preset file blocks to obtain a plurality of file blocks; the preset file block capacity can be set according to actual needs. And then, the DAPP sends the different file blocks to the random IPFS storage node to store the different file blocks to the random IPFS storage node, and the specific number of the IPFS storage nodes is not limited. And preferentially storing the file blocks to the associated preset IPFS storage nodes so as to improve the storage speed of the file blocks.
Preferably, the DAPP sends different file blocks to different IPFS storage nodes using a preset Cluster command (Cluster). The preset cluster command may refer to an existing cluster command. And a preset cluster command is used, so that a certain file block is conveniently synchronized to different nodes.
And when any IPFS storage node receives and stores the file block, the IPFS storage node returns the node address corresponding to the node to the DAPP. And the DAPP stores the node address returned by each IPFS storage node to a preset storage position according to the type of the node address group. The preset storage position is preferably a preset database, and the database preferably uses a MySQL system. The MySQL system stores the data in different data tables instead of centrally searching and locating all the data, so that the storage speed can be increased, and the flexibility of data storage is improved; meanwhile, the MySQL system is small in occupied size, low in construction cost and excellent in performance.
In this embodiment, a public key in a public-private key pair generated by a first user is registered to a Fabric network through DAPP, so as to encrypt a target file uploaded by the first user before uploading, thereby ensuring data security of the target file and encrypted transmission of data. In addition, the encrypted target file is divided into a plurality of file blocks by the DAPP, the file blocks are stored in different IPFS storage nodes, and the node addresses returned by the IPFS storage nodes are stored by the DAPP for downloading the file blocks. The method and the device realize fragmentation and decentralized storage, and any storage party does not store a complete copy, thereby ensuring the security of file storage. Meanwhile, the data chaining of the file uploading behavior realizes the traceability of the file uploading behavior, thereby improving the data security of the file. Thus, a trusted decentralized storage platform is built by using IPFS and Fabric technologies in conjunction with a trusted enterprise server.
Further, based on the first embodiment of the file processing method of the present invention as described above, a second embodiment is proposed. As shown in fig. 5, after the step of storing the node address returned by the IPFS storage node storing the file block to the preset storage location, the DAPP further includes:
step S20, when a file downloading signal is detected, a first file downloading request is sent to the DAPP; the DAPP determines a node address of a first IPFS storage node corresponding to a file to be downloaded according to the first file downloading request, and sends a first file block downloading request to the first IPFS storage node according to the node address of the first IPFS storage node; the DAPP assembles the returned file blocks corresponding to the first IPFS storage node;
referring to fig. 6, in an implementation, when a user needs to download a file (or data), the first user runs a related mobile application on the first user, so as to send a first file download request corresponding to a file download signal to the DAPP to request to download the file.
The DAPP determines, according to the first file download request, a file to be downloaded corresponding to the request and a file block to be pre-split corresponding to the file to be downloaded, specifically including determining a corresponding node address of an IPFS storage node (i.e., the first IPFS storage node described above) storing the file block; the first IPFS storage node is not limited to only one IPFS storage node, but may be a plurality of IPFS storage nodes. And then, the DAPP sends a first file block downloading request to the corresponding IPFS storage node based on the determined corresponding address of the IPFS storage node so as to request for downloading the file block.
Based on a first file block downloading request sent by the DAPP, different IPFS storage nodes return corresponding file blocks to the DAPP, and the returned file blocks are assembled on the DAPP to obtain a complete assembled file. For example, according to the first embodiment, after a certain data file is encrypted, the encrypted file is split into A, B, C three file blocks and stored in three IPFS storage nodes. When downloading the file, the DAPP assembles A, B, C file blocks respectively returned by the three IPFS storage nodes to obtain a complete encrypted file.
And step S21, decrypting the assembly file returned by the DAPP through the private key to obtain the file to be downloaded.
The DAPP returns an assembly file to the first user terminal; the first user side obtains a local stored private key, and assembles the file through the private key to obtain a decrypted file to be downloaded. In addition, as shown in fig. 6, the ue provides functions of previewing, downloading and displaying the file to be downloaded through the related mobile application.
In this embodiment, when a file needs to be downloaded, the DAPP sends a file block download request to an IPFS storage node based on a node address of the IPFS storage node storing a file block corresponding to the file to be downloaded, and then assembles the file block returned by the IPFS to obtain an encrypted file; and the first user end decrypts the encrypted file by using a private key in a public and private key pair stored locally so as to obtain a complete file to be downloaded without encryption. Meanwhile, the data chaining of the file downloading behavior realizes the traceability of the file downloading behavior, thereby improving the security of the file downloading. Therefore, the established trusted decentralized storage platform also has the file downloading function, and the application scene range of the storage platform is expanded.
Further, based on the first embodiment of the file processing method of the present invention as described above, a third embodiment is proposed. As shown in fig. 7, after the step of storing the node address returned by the IPFS storage node in the preset storage location, the DAPP further includes:
step S30, when the file sharing signal is detected, sending a second file downloading request to the DAPP;
the DAPP determines a node address of a second IPFS storage node corresponding to a file to be downloaded according to the second file downloading request, and sends a second file block downloading request to the second IPFS storage node according to the node address of the second IPFS storage node; the DAPP assembles the returned file blocks corresponding to the second IPFS storage node;
referring to fig. 8, in an implementation, when a user needs to share a file (or data) to a user terminal of another user (in this embodiment, referred to as a "second user terminal"), the first user terminal runs a related mobile application, so as to send a second file download request (i.e., a second file download request) corresponding to the file sharing signal to the DAPP to request to download the file.
The DAPP determines, according to the second file download request, the shared file corresponding to the request and the pre-split file block corresponding to the shared file, specifically including determining a corresponding node address of an IPFS storage node (i.e., the second IPFS storage node described above) storing the file block; the second IPFS storage node is not limited to only one IPFS storage node, but may be multiple IPFS storage nodes. And then, the DAPP sends a second file block downloading request to the corresponding IPFS storage node based on the determined corresponding address of the IPFS storage node so as to request for downloading the file block.
And based on a second file block downloading request sent by the DAPP, different IPFS storage nodes return corresponding file blocks to the DAPP, and assemble the returned file blocks on the DAPP to obtain a complete assembled file.
Step S31, decrypting the assembly file returned by the DAPP through the private key to obtain a shared file;
the DAPP returns an assembly file to the first user terminal; the first user side obtains a local stored private key, and assembles the file through the private key to obtain a decrypted shared file.
Step S32, obtaining a target user public key corresponding to the second user terminal;
a user selects a second user end needing to share files from a first user end; accordingly, the first user confirms the Fabric node where the second user stores the public key (i.e., the target user public key), and obtains the target user public key from the Fabric node.
Step S33, encrypting the shared file through the target user public key to obtain a second encrypted file;
and re-encrypting the decrypted shared file through the acquired target user public key to obtain a second encrypted file. The shared file is encrypted using the target user public key, preferably using an asymmetric encryption algorithm, to improve the encryption level of the file.
Step S34, uploading the second encrypted file to the DAPP;
the DAPP stores a second encrypted file to a third IPFS storage node based on a second preset storage mode, and sends a node address of the third IPFS storage node to a second user end; the second user side acquires a second encrypted file from the third IPFS storage node through the node address of the third IPFS storage node, and decrypts and displays the second encrypted file through a target user private key locally stored in the second user side; and the second user terminal cleans the node address of the third IPFS storage node after destroying the second encrypted file.
As shown in fig. 8, after receiving the second encrypted file uploaded by the first user, the DAPP directly and independently sends the second encrypted file to any IPFS storage node (which may be one or more IPFS storage nodes) in the IPFS network; correspondingly, the DAPP forwards the node address returned by the IPFS storage node (i.e. the third IPFS storage node described above) to the second user end; the third IPFS storage node is not limited to only one IPFS storage node, but may be a plurality of IPFS storage nodes. And the second user side sends a file downloading request of the second encrypted file to the third IPFS storage node through the node address of the third IPFS storage node so as to acquire the second encrypted file from the third IPFS storage node. And then, the second user terminal decrypts the second encrypted file through a target user private key locally stored in the second user terminal. Understandably, as shown in fig. 8, the second user terminal provides a display function of the decrypted file (i.e., the shared file) through the related mobile terminal application.
In addition, when the second user terminal displays that the downloaded shared file exceeds the preset duration, the second user terminal automatically destroys the downloaded shared file. The preset duration can be set according to actual needs, for example, different file capacities correspond to different preset durations, and the larger the file capacity is, the longer the preset duration is.
Preferably, after the shared file is destroyed, the second user uses a preset Cluster command (Cluster) to clean the node address of the third IPFS storage node, so that the shared file and the address of the IPFS storage node required by downloading the shared file are effectively cleaned, the effect of burning after reading is achieved, the shared file is prevented from being maliciously copied, and the data security of the shared file is protected. The preset cluster command may refer to an existing cluster command. Meanwhile, file blocks and shared files in the file sharing process are encrypted in advance, so that the files are effectively protected; and the data chaining of the file sharing behavior realizes the traceability of the file sharing behavior, thereby improving the security of the file sharing. Therefore, the established trusted decentralized storage platform also has a file sharing function, and the application scene range of the storage platform is expanded.
Correspondingly to the above embodiment of the file processing method, the present invention further provides a user side, including: the file processing system comprises a memory, a processor and a file processing program stored on the memory and capable of running on the processor, wherein the file processing program realizes the steps of the file processing method according to the above embodiments when being executed by the processor.
The user side can be various mobile intelligent devices such as a smart phone and a tablet computer.
In addition, the invention also provides a readable storage medium.
The readable storage medium has stored thereon a file processing program which, when executed by a processor, implements the steps of the file processing method as described in any one of the above.
The embodiments of the file processing apparatus and the readable storage medium of the present invention are substantially the same as the embodiments of the file processing method described above, and are not described herein again.
In addition, the invention also provides a file processing method which is applied to a server, wherein the server is deployed with a distributed application program DAPP, a preset interface of the DAPP is respectively connected with a preset Fabric node in the distributed accounting network Fabric and a preset IPFS storage node in the interplanetary file system IPFS network, and the server is connected with a first user end;
the system architecture of the server refers to the first embodiment of the file processing method of the present invention.
Referring to fig. 9, fig. 9 is a flowchart illustrating a file processing method according to a fourth embodiment of the present invention. In this embodiment, the method includes the steps of:
step S40, when a first encrypted file uploaded by a first user side is received, splitting the first encrypted file into a plurality of file blocks;
after confirming that the initial user registration and identity authentication pass, the first user terminal generates a public key and a private key which are paired with each other; the private key is locally stored by the first user side, and the DAPP registers the public key uploaded by the first user side to a Fabric network through a preset Fabric node; when a file uploading signal is detected, the first user side obtains a file to be uploaded and obtains the public key; the first user terminal encrypts the file to be uploaded by using the public key to obtain a first encrypted file;
referring to fig. 3, in a specific implementation, if the first user terminal initially runs the related mobile application, the first user terminal needs to perform basic information filling and user identity authentication. The user basic information may be a name, an identification number, a mobile phone number, or the like of the user. The user identity authentication can be performed through the short message authentication code, or other identity authentication modes are adopted. After the first user side confirms that the first user registration and the identity authentication pass, at least one pair of a public key and a private key which are matched with each other is generated; and the generation mode of the public and private key pair is not limited.
Then, the first user end locally stores the generated private key and uploads the generated public key to the DAPP; the DAPP interface is connected with the preset Fabric node so as to register the public key uploaded by the first user end to the Fabric network through the preset Fabric node. Taking trusted authority a in fig. 1 as an example, user a uploads the generated public key to DAPP1 deployed by server S1, and DAPP1 uploads the public key to associated Fabric node 1 through a specific data interface, so as to register the public key on the Fabric distributed accounting network (i.e., blockchain) and generate a corresponding block. Meanwhile, the user A directly stores the generated private key in a local storage area of the user A.
When a user needs to upload a certain file for storage, the first user obtains the file to be uploaded (such as the file/data uploaded to the application program of the mobile terminal), and sends a public key obtaining instruction to the DAPP, so that the DAPP is connected with the Fabric network through a preset Fabric node, and the DAPP obtains the public key registered in the Fabric network and sends the public key to the first user. And then, the first user terminal encrypts the file to be uploaded by using the public key to obtain a first encrypted file.
Referring to fig. 4, the file to be uploaded is encrypted by using a public key, preferably by using an asymmetric encryption algorithm, so as to improve the encryption level of the file.
Step S41, storing the file block to an IPFS storage node in the IPFS network;
the DAPP splits the first encrypted file into a plurality of file blocks, and stores the file blocks to a plurality of arbitrary IPFS storage nodes in the IPFS network; the DAPP can split the first encrypted file according to the capacity of the preset file blocks to obtain a plurality of file blocks; the preset file block capacity can be set according to actual needs. Furthermore, the DAPP sends different file blocks to the random IPFS storage node to store the different file blocks to the random IPFS storage node, and the specific number of the IPFS storage nodes is not limited. And preferentially storing the file blocks to the associated preset IPFS storage nodes so as to improve the storage speed of the file blocks.
Preferably, the DAPP sends different file blocks to different IPFS storage nodes using a preset Cluster command (Cluster). The preset cluster command may refer to an existing cluster command. And a preset cluster command is used, so that a certain file block is conveniently synchronized to different nodes.
And step S42, storing the node address returned by the IPFS storage node storing the file block to a preset storage position.
And when any IPFS storage node receives and stores the file block, the IPFS storage node returns the node address corresponding to the node to the DAPP. And the DAPP stores the node address returned by each IPFS storage node to a preset storage position according to the type of the node address group. The preset storage position is preferably a preset database, and the database preferably uses a MySQL system. The MySQL system stores the data in different data tables instead of centrally searching and locating all the data, so that the storage speed can be increased, and the flexibility of data storage is improved; meanwhile, the MySQL system is small in occupied size, low in construction cost and excellent in performance.
In this embodiment, a public key in a public-private key pair generated by a first user is registered to a Fabric network through DAPP, so as to encrypt a target file uploaded by the first user before uploading, thereby ensuring data security of the target file and encrypted transmission of data. In addition, the encrypted target file is divided into a plurality of file blocks by the DAPP, the file blocks are stored in different IPFS storage nodes, and the node addresses returned by the IPFS storage nodes are stored by the DAPP for downloading the file blocks. The method and the device realize fragmentation and decentralized storage, and any storage party does not store a complete copy, thereby ensuring the security of file storage. Meanwhile, the data chaining of the file uploading behavior realizes the traceability of the file uploading behavior, thereby improving the data security of the file. Thus, a trusted decentralized storage platform is built by using IPFS and Fabric technologies in conjunction with a trusted enterprise server.
Further, a fifth embodiment is proposed based on the fourth embodiment of the document processing method of the present invention as described above. As shown in fig. 10, after the step of storing the node address returned by the IPFS storage node storing the file block to the preset storage location, the method further includes:
step S50, when a first file downloading request sent by a first user terminal is received, determining a node address of a first IPFS storage node corresponding to a file to be downloaded according to the first file downloading request;
step S51, sending a first file block downloading request to the first IPFS storage node according to the node address of the first IPFS storage node;
step S52, assembling the returned file blocks corresponding to the first IPFS storage node;
and the first user terminal decrypts the assembled file returned by the DAPP through the private key to obtain the file to be downloaded.
Referring to fig. 6, in an implementation, when a user needs to download a file (or data), the first user runs a related mobile application on the first user, so as to send a first file download request corresponding to a file download signal to the DAPP to request to download the file.
The DAPP determines, according to the first file download request, a file to be downloaded corresponding to the request and a file block to be pre-split corresponding to the file to be downloaded, specifically including determining a corresponding address of an IPFS storage node (i.e., the first IPFS storage node described above) storing the file block; the first IPFS storage node is not limited to only one IPFS storage node, but may be a plurality of IPFS storage nodes. And then, the DAPP sends a first file block downloading request to the corresponding IPFS storage node based on the determined corresponding address of the IPFS storage node so as to request for downloading the file block.
Based on a first file block downloading request sent by the DAPP, different IPFS storage nodes return corresponding file blocks to the DAPP, and the returned file blocks are assembled on the DAPP to obtain a complete assembled file. For example, according to the first embodiment, after a certain data file is encrypted, the encrypted file is split into A, B, C three file blocks and stored in three IPFS storage nodes. When downloading the file, the DAPP assembles A, B, C file blocks respectively returned by the three IPFS storage nodes to obtain a complete encrypted file.
And then, the first user terminal decrypts the assembled file returned by the DAPP through the private key to obtain the file to be downloaded.
The DAPP returns an assembly file to the first user terminal; the first user side obtains a local stored private key, and assembles the file through the private key to obtain a decrypted file to be downloaded. In addition, as shown in fig. 6, the ue provides functions of previewing, downloading and displaying the file to be downloaded through the related mobile application.
In this embodiment, when a file needs to be downloaded, the DAPP sends a file block download request to an IPFS storage node based on a node address of the IPFS storage node storing a file block corresponding to the file to be downloaded, and then assembles the file block returned by the IPFS to obtain an encrypted file; and the first user end decrypts the encrypted file by using a private key in a public and private key pair stored locally so as to obtain a complete file to be downloaded without encryption. Meanwhile, the data chaining of the file downloading behavior realizes the traceability of the file downloading behavior, thereby improving the security of the file downloading. Therefore, the established trusted decentralized storage platform also has the file downloading function, and the application scene range of the storage platform is expanded.
Further, based on the fourth embodiment of the file processing method of the present invention as described above, a sixth embodiment is proposed. As shown in fig. 11, after the step of storing the node address returned by the IPFS storage node storing the file block to the preset storage location, the method further includes:
step S60, when a second file downloading request sent by the first user terminal is received, determining a node address of a second IPFS storage node corresponding to the file to be downloaded according to the second file downloading request, and sending a second file block downloading request to the second IPFS storage node according to the node address of the second IPFS storage node;
in specific implementation, when a user needs to share a file (or data) to a user terminal of another user (in this embodiment, referred to as a "second user terminal"), the first user terminal runs the relevant mobile application, so as to send a second file download request (i.e., a second file download request) corresponding to the file sharing signal to the DAPP to request to download the file.
The DAPP determines, according to the second file download request, the shared file corresponding to the request and the pre-split file block corresponding to the shared file, specifically including determining a corresponding node address of an IPFS storage node (i.e., the second IPFS storage node described above) storing the file block; the second IPFS storage node is not limited to only one IPFS storage node, but may be multiple IPFS storage nodes. And then, the DAPP sends a second file block downloading request to the corresponding IPFS storage node based on the determined corresponding address of the IPFS storage node so as to request for downloading the file block.
Step S61, assembling the returned file blocks corresponding to the second IPFS storage node, and returning the assembled file to the first user end;
the first user terminal decrypts the assembled file through the private key to obtain a shared file; acquiring a target user public key corresponding to the second user end; the first user terminal encrypts the shared file through the target user public key to obtain a second encrypted file;
and based on a second file block downloading request sent by the DAPP, different IPFS storage nodes return corresponding file blocks to the DAPP, and assemble the returned file blocks on the DAPP to obtain a complete assembled file.
Subsequently, the DAPP returns the assembly file to the first user terminal; the first user side obtains a local stored private key, and assembles the file through the private key to obtain a decrypted shared file.
Subsequently, the DAPP returns the assembly file to the first user terminal; the first user side obtains a local stored private key, and assembles the file through the private key to obtain a decrypted shared file. And the first user side encrypts the decrypted shared file again through the acquired target user public key to obtain a second encrypted file. The shared file is encrypted using the target user public key, preferably using an asymmetric encryption algorithm, to improve the encryption level of the file.
Step S62, when a second encrypted file uploaded by the first user side is received, storing the second encrypted file to a third IPFS storage node based on a second preset storage mode, and sending a node address of the third IPFS storage node to the second user side;
the second user side acquires a second encrypted file from the third IPFS storage node through the node address of the third IPFS storage node, decrypts the second encrypted file through a target user private key locally stored in the second user side, and displays the second encrypted file; and the second user terminal cleans the node address of the third IPFS storage node after destroying the second encrypted file.
After receiving a second encrypted file uploaded by a first user side, the DAPP directly and independently sends the second encrypted file to any IPFS storage node (which may be one or more IPFS storage nodes) in the IPFS network; correspondingly, the DAPP forwards the node address returned by the IPFS storage node (i.e. the third IPFS storage node described above) to the second user end; the third IPFS storage node is not limited to only one IPFS storage node, but may be a plurality of IPFS storage nodes. And the second user side sends a file downloading request of the second encrypted file to the third IPFS storage node through the node address of the third IPFS storage node so as to acquire the second encrypted file from the third IPFS storage node. And then, the second user terminal decrypts the second encrypted file through a target user private key locally stored in the second user terminal. Understandably, the second user end provides the functions of previewing, downloading and displaying the decrypted file (i.e. the shared file) through the related mobile end application program.
In addition, when the second user terminal displays that the downloaded shared file exceeds the preset duration, the second user terminal automatically destroys the downloaded shared file. The preset duration can be set according to actual needs, for example, different file capacities correspond to different preset durations, and the larger the file capacity is, the longer the preset duration is.
Preferably, after the shared file is destroyed, the second user uses a preset Cluster command (Cluster) to clean the node address of the third IPFS storage node, so that the shared file and the address of the IPFS storage node required by downloading the shared file are effectively cleaned, the effect of burning after reading is achieved, the shared file is prevented from being maliciously copied, and the data security of the shared file is protected. The preset cluster command may refer to an existing cluster command. Meanwhile, file blocks and shared files in the file sharing process are encrypted in advance, so that the files are effectively protected; and the data chaining of the file sharing behavior realizes the traceability of the file sharing behavior, thereby improving the security of the file sharing. Therefore, the established trusted decentralized storage platform also has a file sharing function, and the application scene range of the storage platform is expanded.
Correspondingly to the above file processing method embodiment, the present invention further provides a server, including: a memory, a processor and a file processing program stored on the memory and executable on the processor, the file processing program when executed by the processor implementing the steps of the file processing method as described above.
The type of the server is not particularly limited.
In addition, the invention also provides a readable storage medium.
The readable storage medium has stored thereon a file processing program which, when executed by a processor, implements the steps of the file processing method as described in any one of the above.
The embodiments of the file processing apparatus and the readable storage medium of the present invention are substantially the same as the embodiments of the file processing method described above, and are not described herein again.
The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same or similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the description of the method item.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
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