CN111984614A - Method, device and system for sharing files - Google Patents

Abstract

The invention discloses a method, device and system for sharing files, and relates to the technical field of computers. A specific implementation of the method includes: obtaining a file to be shared, forming a file compressed package, performing a blockchain on-chain operation on the file compressed package, obtaining a corresponding first hash value, and selecting a set number of first hashes The value is uploaded to the chain and the current hash value is obtained; after looping until the root hash value is obtained, the current hash value of each level is stored in a set number of forked tree structures. Based on the root hash value, traverse the hash value of the node of the bifurcated tree structure to obtain the shared files in the file compressed package; by compressing multiple files into a file compressed package, the burden of network resources caused by the large number of files is partially overcome. For high technical problems, the efficiency of file uploading and sharing is improved by concurrently uploading the compressed packages of each file to the chain; using the bifurcated tree structure to store and share the root hash value, obtain the shared file through the root hash value, and improve the file security.

Description

A method, device and system for sharing files

technical field

The present invention relates to the field of computer technology, and in particular, to a method, device and system for sharing files.

Background technique

In the business process of enterprises, it is often necessary to share the files required by the business, especially when it comes to business between enterprises. With the development of blockchain technology, enterprises can share files based on the blockchain. The main methods are: 1. Put all shared files on the chain as transactions and broadcast them to achieve sharing; 2. Save the files in a centralized database, upload the electronic certificates of the files to the chain and broadcast them to achieve sharing.

In the process of realizing the present invention, the inventor found that there are at least the following problems in the prior art:

Using the method of method 1, when the number of files is large, the utilization rate of network resources is too high and the efficiency of file uploading is reduced; file, there will be certain security risks.

SUMMARY OF THE INVENTION

In view of this, the embodiments of the present invention provide a method and apparatus for sharing files, which can obtain a file to be shared, form a file compression package, perform a blockchain on-chain operation on the file compression package, and obtain a corresponding first hash value. , select a set number of first hash values to upload on the chain and obtain the current hash value; after looping until the root hash value is obtained, the current hash values of each level are stored in a set number of forked tree structures. Based on the root hash value, traverse the hash value of the node of the bifurcated tree structure to obtain the shared files in the file compressed package; by compressing multiple files into a file compressed package, the burden of network resources caused by the large number of files is partially overcome. For high technical problems, the efficiency of file uploading and sharing is improved by concurrently uploading the compressed packages of each file to the chain; using the bifurcated tree structure to store and share the root hash value, obtain the shared file through the root hash value, and improve the file security.

In order to achieve the above object, according to a first aspect of the embodiments of the present invention, a method for sharing files is provided, characterized in that, the method includes: acquiring files to be shared, forming multiple file compression packages; The blockchain is operated on the chain, and at least three first hash values corresponding to the file compressed package are obtained from the blockchain; the first hash value is used as the current hash value, and the following operations are performed cyclically until all the The number of the current hash values is 1: from the at least three current hash values, a set number of current hash values are respectively selected, and an intermediate hash value is generated based on the selected set number of current hash values , perform the blockchain on-chain operation on the intermediate hash value, and obtain the corresponding second hash value from the blockchain; when there is the current hash value that has not been selected and has not been selected When the number of the current hash values is less than the set number, generate an intermediate hash value based on the current hash value that has not been selected, perform a blockchain on-chain operation on the intermediate hash value, and Obtain the corresponding second hash value from the blockchain; use the second hash value as the current hash value; the set number is an integer greater than 2; use the current hash value as the root hash value hash value, and send the hash value.

Optionally, the method for sharing files is characterized in that:

Obtain the files to be shared and form multiple file compression packages, including:

Obtain files to be shared within a predefined time range, form at least three file packages, and determine the number of files in the file packages according to network bandwidth.

Optionally, the method for sharing files is characterized in that:

Compressing and encrypting the file package are respectively performed to form the file compression package.

Optionally, the method for sharing files is characterized in that:

A concurrent blockchain uploading operation is performed on the file compressed package.

In order to achieve the above object, according to a second aspect of the embodiments of the present invention, a method for sharing files is provided, which includes: receiving a current hash value; cyclically executing the following steps until the current hash value is obtained The corresponding file compressed package; determine that there is a file compressed package hash value that is the same as the current hash value on the blockchain, if so, execute A1; otherwise, execute A2; A1: from the blockchain Acquire the file compressed package corresponding to the current hash value; A2: Determine each lower-level hash value corresponding to the current hash value, and use the lower-level hash value as the current hash value.

Optionally, the method for sharing files is characterized in that:

Obtain the file compressed package corresponding to the current hash value, including:

Obtain the file compressed package corresponding to the current hash value, perform decompression and decryption operations on the file compressed package, and obtain the files in the file compressed package.

In order to achieve the above object, according to a third aspect of the embodiments of the present invention, a device for sharing files is provided, which is characterized by comprising: a file compression package uploading module, a node hash value obtaining module, and a root hash value obtaining module ;in,

The file compression package uploading module is used to obtain the files to be shared to form a plurality of file compression packages; perform the blockchain chaining operation on the file compression package, and obtain the corresponding file compression package from the blockchain at least three first hash values of ;

The upper-level hash value acquisition module is configured to use the first hash value as the current hash value, and perform the following operations cyclically until the number of the current hash values is 1: from the at least three current hash values Among the values, a set number of current hash values are respectively selected, an intermediate hash value is generated based on the selected set number of current hash values, the blockchain on-chain operation is performed on the intermediate hash value, and the The blockchain obtains the corresponding second hash value; when there is the current hash value that has not been selected, and the number of the current hash value that has not been selected is less than the set number, based on the unselected current hash value The selected current hash value generates an intermediate hash value, performs a blockchain on-chain operation on the intermediate hash value, and obtains a corresponding second hash value from the blockchain; The hash value is used as the current hash value; the set number is an integer greater than 2;

The root hash value obtaining module is configured to use the current hash value as the root hash value and send the hash value.

Optionally, the device for sharing files is characterized in that:

Obtain the files to be shared and form multiple file compression packages, including:

Obtain files to be shared within a predefined time range, form at least three file packages, and determine the number of files in the file packages according to network bandwidth.

Optionally, the device for sharing files is characterized in that:

Compressing and encrypting the file package are respectively performed to form the file compression package.

Optionally, the device for sharing files is characterized in that:

A concurrent blockchain uploading operation is performed on the file compressed package.

In order to achieve the above object, according to a fourth aspect of the embodiments of the present invention, there is also provided an apparatus for sharing files, which is characterized in that it includes: acquiring a file module on the chain; wherein,

The module for obtaining the file on the chain is used to receive the current hash value; the following steps are performed cyclically until the file compressed package corresponding to the current hash value is obtained; The hash value of the file compressed package with the same value, if yes, execute A1; otherwise, execute A2; A1: Obtain the file compressed package corresponding to the current hash value from the blockchain; A2: Determine the current each lower-level hash value corresponding to the hash value, and the lower-level hash value is used as the current hash value.

Optionally, the device for sharing files is characterized in that:

Obtain the file compressed package corresponding to the current hash value, including:

Obtain the file compressed package corresponding to the current hash value, perform decompression and decryption operations on the file compressed package, and obtain the files in the file compressed package.

To achieve the above object, according to a fifth aspect of the embodiments of the present invention, a system 900 for sharing files is provided, including the device 700 for sharing files provided in the third aspect and the device 800 for sharing files provided in the fourth aspect. ;

To achieve the above object, according to a sixth aspect of the embodiments of the present invention, an electronic device for sharing files is provided, which is characterized by comprising: one or more processors; a storage device for storing one or more programs, When the one or more programs are executed by the one or more processors, the one or more processors implement the method as described in any one of the above methods for sharing files.

In order to achieve the above object, according to a seventh aspect of the embodiments of the present invention, a computer-readable medium is provided on which a computer program is stored, wherein the program is executed by a processor to implement the above-mentioned method for sharing files any of the methods described above.

One embodiment of the above invention has the following advantages or beneficial effects: obtaining a file to be shared, forming a file compression package, performing a blockchain on-chain operation on the file compression package and obtaining a corresponding first hash value, selecting a set number of The first hash value is uploaded to the chain and the current hash value is obtained; after looping until the root hash value is obtained, the current hash value of each level is stored in a set number of forked tree structures. Based on the root hash value, traverse the hash value of the node of the bifurcated tree structure to obtain the shared files in the file compressed package; by compressing multiple files into a file compressed package, the burden of network resources caused by the large number of files is partially overcome. For high technical problems, the efficiency of file uploading and sharing is improved by concurrently uploading the compressed packages of each file to the chain; using the bifurcated tree structure to store and share the root hash value, obtain the shared file through the root hash value, and improve the file security.

Further effects of the above non-conventional alternatives will be described below in conjunction with specific embodiments.

Description of drawings

The accompanying drawings are used for better understanding of the present invention and do not constitute an improper limitation of the present invention. in:

1 is a schematic flowchart of a method for storing a shared file provided by an embodiment of the present invention;

FIG. 2 is a schematic flow chart of obtaining a shared file provided by an embodiment of the present invention;

3 is a schematic diagram of storing a shared file hash value using a multi-tree structure provided by an embodiment of the present invention;

FIG. 4 is a schematic flow chart of obtaining a shared file according to an embodiment of the present invention;

5 is a schematic diagram of a shared file hash value stored in a multi-tree structure provided by an embodiment of the present invention;

6 is a schematic flowchart of a shared file provided by an embodiment of the present invention;

7 is a schematic structural diagram of an apparatus for sharing files provided by an embodiment of the present invention;

8 is a schematic structural diagram of an apparatus for acquiring a shared file provided by an embodiment of the present invention;

9 is a schematic structural diagram of a system for acquiring a shared file provided by an embodiment of the present invention;

10 is an exemplary system architecture diagram to which an embodiment of the present invention may be applied;

FIG. 11 is a schematic structural diagram of a computer system suitable for implementing a terminal device or a server according to an embodiment of the present invention.

Detailed ways

Exemplary embodiments of the present invention are described below with reference to the accompanying drawings, which include various details of the embodiments of the present invention to facilitate understanding and should be considered as exemplary only. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the invention. Also, descriptions of well-known functions and constructions are omitted from the following description for clarity and conciseness.

As shown in FIG. 1, an embodiment of the present invention provides a method for storing a shared file, and the method may include the following steps:

Step S101: Acquire the files to be shared to form multiple file compression packages; perform a blockchain on-chain operation on the file compression packages, and obtain at least three first hashes corresponding to the file compression packages from the blockchain value.

Specifically, the file to be shared can be a transaction file generated by an electronic bank, a statement file generated by an electronic bank, an order file generated by an electronic mall, etc. The present invention does not limit the format and content of the file with sharing; further , obtaining files to be shared to form multiple file compression packages, including: obtaining files to be shared within a predefined time range, forming at least three file packages, and determining the number of files in the file packages according to network bandwidth.

Specifically, an embodiment of the present invention is based on the hash values corresponding to multiple file compression packages, and after looping through the hash values of each level to upload the chain and obtain the hash value of the next level, thereby forming a multi-fork tree-like hash value Value structure, the number of forks of the multi-fork tree is at least 3, that is, the set number is an integer greater than 2; that is, at least the third third corresponding to the file compressed package is obtained from the blockchain A hash value; it can be understood that the number of file compressed packages can be based on the number of shared files received within a time range, that is, to obtain the files to be shared generated within a predefined time range, for example, within an hour Transaction documents generated by an electronic bank within one hour, statement documents generated by two electronic banks within an hour, order documents generated by an electronic mall within one day, etc. The predefined time range can be based on business scenarios and document generation. The specific content of the predefined time range is not limited in the present invention.

Further, obtain the files to be shared, for example, obtain the files to be shared within a predefined time range to form at least three file packages, and determine the number of files in each of the file packages according to the network bandwidth, and form them respectively. At least three file compression packages; obtain the number of files generated within the predefined time range, combined with factors such as network bandwidth, divide the files into multiple file packages, and compress the file packages respectively to form File compression package; the number of files contained in the file package is set according to the size of the file, so the number in the file package is variable. According to the total amount in a time range, each file is determined by obtaining the bandwidth of the network The number of files contained in the package, and further, the file package is compressed to form a plurality of file compressed packages;

Compressing and encrypting the file package are respectively performed to form the file compression package. Among them, at least three file compression packages are formed, and the compression operation and encryption operation are also performed, and the security of the files is improved by encryption, especially, the security requirements of documents such as statements between electronic banks and other documents are improved. Security, the encryption method can be encrypted by using compression software, such as gzip, WinRAR, etc.; the encryption method can be encrypted by using compression software, and can also be encrypted by operating system or encryption software. The specific method is not limited.

Still further, the concurrent blockchain uploading operation is performed on each file compressed package, because each file compressed package does not have a dependent transaction relationship, the concurrent on-chain operation of the file compressed package is performed; that is, the file compressed package is executed. Blockchain concurrent on-chain operations. It is understandable that due to the limitation of resources such as network bandwidth, the uploading operation of multiple file compressed packages can be performed in batches, and the file compressed packages in each batch are concurrently uploaded to the chain. The efficiency of file uploading is improved; further, the blockchain uploading operation is performed on the at least three file compressed packages, and at least three first hash values corresponding to the at least three file compressed packages are obtained respectively; Among them, the file compressed package can be used as a transaction to perform the blockchain on-chain operation, and the hash value returned for the transaction can be obtained from the blockchain respectively, and the hash value is the first hash value corresponding to the file compressed package. Value; wherein, the blockchain used can be a consortium chain, a private chain, etc., and the type of the blockchain is not limited in the present invention. The present invention does not limit the specific tools or methods used to perform blockchain on-chain.

Step S102: Take the first hash value as the current hash value, and perform the following operations cyclically until the number of the current hash values is 1: from the at least three current hash values, select and set respectively A number of current hash values, an intermediate hash value is generated based on the selected set number of current hash values, the blockchain on-chain operation is performed on the intermediate hash value, and the corresponding second hash value is obtained from the blockchain. Hash value; when there is the current hash value that has not been selected and the number of the current hash value that has not been selected is less than the set number, based on the current hash value that has not been selected Generate an intermediate hash value from the hash value, perform a blockchain on-chain operation on the intermediate hash value, and obtain a corresponding second hash value from the blockchain; use the second hash value as the current hash value. Greek value; the set number is an integer greater than 2.

Specifically, according to the first hash value corresponding to each file compression package formed in step S101, an intermediate hash value is generated based on the selected set number of current hash values, and the blockchain is executed on the intermediate hash value. On-chain operation, and obtain the corresponding second hash value from the blockchain; specifically, based on the selected set number of current hash values to generate intermediate hash values, the set number of current hash values can be combined To generate the intermediate hash value, the intermediate hash value can also be generated by calculating a set number of current hash values. The present invention does not limit the specific method for generating the intermediate hash value based on the set number of current hash values. Further, the intermediate hash value can be used as a transaction to perform the blockchain on-chain operation, and the second hash value returned for the transaction can be obtained from the blockchain respectively; this step is repeated to obtain the second hash value of each level. . Among them, the set number is an integer greater than 2, for example, 3, 4, 10, 100, 1000, the set number is used to set the number of forks of the multi-tree structure, and the set number can be based on business scenarios or file compression The specific value of the set number is not limited in the present invention.

In the loop process, the first hash value and the second hash value are used as the current hash value; it can be understood that, according to the above description, the hash values of each level are obtained through the loop until the unique root hash value is obtained. Hash value (that is, until the number of the current hash value is 1), perform blockchain on-chain on the first hash value and the second hash value (current hash value) respectively, forming a multi-fork The hash value storage structure of a tree (a set number of forked trees). Through the above method, the complexity of acquiring the file is improved, thereby improving the security of the file.

An example is given below, for example: the number of hash values of the file compressed package is 99, corresponding to 99 first hash values; the set number is 5; then the first hash value is used as the current hash value, and the cycle is executed The following operations are performed until the number of the current hash value is 1: that is, the 99 first hash values are used as the current hash value and the following operations are performed cyclically: from the 99 hash values, a set number of ( For example: 5) current hash values, and based on the selected set number (for example: 5) current hash values, an intermediate hash value is generated, and the blockchain on-chain operation execution area is performed on the intermediate hash value. The block chain is operated on the chain, and the corresponding second hash value is obtained from the block chain; it is understandable that 5 current hash values are selected from the 99 first hash values, and according to the selected 5 hash values Generate an intermediate hash value from the hash value, perform the blockchain on-chain operation on the intermediate hash value, and obtain the corresponding second hash value from the blockchain. Through the above operation, it can be known that 19 second hash values are obtained. value; further, 19 second hash values are obtained based on 95 (19*5) pairs of hash values among the 99 first hash values, it is understandable that since the set number is 5, there are also When 4 are not selected, and the number of the current hash values that have not been selected is less than the set number (for example: 5), then an intermediate hash value is generated based on the 4 first hash values, Perform the blockchain on-chain operation on the intermediate hash value, and obtain the corresponding second hash value from the blockchain; that is, when there is the current hash value that has not been selected, and the When the number of the current hash values is less than the set number, an intermediate hash value is generated based on the current hash value that has not been selected, and the blockchain on-chain operation is performed on the intermediate hash value, and the The blockchain obtains the corresponding second hash value.

Based on the above example steps, it can be seen that 20 second hash values are obtained from 99 first hash values. Further, the 20 second hash values are used as the current hash value, and the above steps are executed cyclically. Further, similar to It can be known that among the 20 current hash values, 5 (set number) are selected to generate intermediate hash values, the blockchain up-chain operation is performed on the intermediate hash values, and the corresponding down-links are obtained from the blockchain. For the second hash value of one level, four second hash values (current hash values) are obtained; further, one second hash value is obtained, that is, up to the number of the current hash values is 1; cyclic execution stops. That is, the first hash value is taken as the current hash value, and the following operations are performed cyclically until the number of the current hash values is 1: from the at least three current hash values, respectively select a set number of a current hash value, generate an intermediate hash value based on the selected set number of current hash values, perform a blockchain on-chain operation on the intermediate hash value, and obtain the corresponding second hash value from the blockchain Value; when there is the current hash value that has not been selected, and the number of the current hash value that has not been selected is less than the set number, based on the current hash value that has not been selected value to generate an intermediate hash value, perform a blockchain on-chain operation on the intermediate hash value, and obtain a corresponding second hash value from the blockchain; use the second hash value as the current hash value value; the set number is an integer greater than 2.

It can be understood that, according to the above description, the operation of obtaining a hash value through a loop operation until a unique root hash value is obtained, forming a hash value storage structure of a multi-fork tree. Through the above method, the complexity of acquiring the file is improved, thereby improving the security of the file. The further description of the method for obtaining the root hash value is consistent with steps S301 to S303 of the example shown in FIG. 3 ; details are not repeated here.

Step S103: Use the current hash value as the root hash value, and send the hash value.

Specifically, according to the storage structure of the multi-fork tree (that is, the set number of fork trees) described in step S102, after circulation, the root hash value is obtained and the root hash value is sent; further, the schematic diagram of FIG. 5 is used below. Explain the above steps, as shown in Figure 5, if the set number is N; and the number in each circle represents the identifier of the current hash value of each level, assuming that before the root hash value is obtained, the current hash value of each level is The number of hash values is not less than the set number, and the set number N of current hash values are respectively selected, and according to the selected set number of the current hash values, intermediate hash values are respectively generated, and the intermediate hash values are respectively generated. The hash value performs the blockchain on-chain operation, and obtains a plurality of corresponding second hash values from the blockchain; the above operations are performed cyclically, after M levels, the current number of hash values is 1, that is, the root is obtained. Hash value; further, there are two methods for sending the root hash value: 1) sending the root hash value through the blockchain to the acquirer who has the permission to obtain the shared file; 2) sending the root hash value by other means The root hash value is given to the acquirer who has the permission to acquire the shared file, such as official email, etc. It is understandable that the root hash value is sent to the acquirer who has the permission to acquire the shared file, and the The party can be one or more parties; for example: the document is a statement generated by bank A and bank B within a predefined time range; after step S101-step S103, the root hash value is generated, then the root hash value is generated. The values are sent to Bank A and Bank B who have access to these statement files; obviously, using this operation further increases the security of the files.

As shown in FIG. 2, an embodiment of the present invention provides a method for acquiring a shared file, and the method may include the following steps:

Step S201: Receive the current hash value; perform the following steps in a loop until the file compressed package corresponding to the current hash value is obtained; determine that a file compressed package that is the same as the current hash value exists on the blockchain Hash value, if yes, execute A1; otherwise, execute A2; A1: Obtain the file compressed package corresponding to the current hash value from the blockchain; A2: Determine each subordinate corresponding to the current hash value hash value, and use the lower-level hash value as the current hash value.

Specifically, according to the root hash value, the description of the method for obtaining the file in the file compression package corresponding to the file compression package hash value from the blockchain is consistent with the example described in steps S401-S403, here No longer.

As shown in FIG. 3 , an embodiment of the present invention provides a method for storing a shared file and a hash value by using a multi-tree structure, and the method may include the following steps:

Step S301: Obtain a first hash value corresponding to each file compression package.

Specifically, the description about generating the file compressed package and obtaining the corresponding first hash value is consistent with step S101, and details are not repeated here. In the example shown in Figure 3, 10 file compression packages are included. It can be understood that the number of file compression packages can be tens, hundreds, tens of thousands, hundreds of thousands, millions, tens of millions, etc.; In order to specifically describe steps S301 to S303, this example uses a set number of 4 as an example, that is, a 4-ary tree structure; according to the file compressed packages 1-10, the first hash values 1-10 are obtained respectively.

Step S302-Step S303: Obtain the second hash value.

Specifically, the example of step S302-step S303 describes the cyclically executed operation of obtaining the second hash value (current hash value); specifically, for the sake of illustration, as shown in FIG. The hash values are level 1, level 2, and level 3 respectively; as shown in Figure 3, the example contains 10 first hash values; if the number is set to 4, the first hash value is used as the current hash value. Hash value, perform the following operations in a loop until the number of the current hash value is 1; from the 10 first hash values, select 4 first hash values respectively, and based on these 4 first hash values Generate an intermediate hash value, perform a blockchain on-chain operation on the intermediate hash value, and obtain a corresponding second hash value from the blockchain; for example, based on the first hash value 1-4, obtain the first hash value. Second hash value 1, based on the first hash value 5-8, the second hash value 2 is obtained; the first hash value 9, the first hash value 10 (10 minus 2 groups, each group 4 number, the remainder is 2) is the current hash value that has not been selected, and the number of the current hash value that has not been selected is less than the set number, 2<4, then based on the two The first hash value (the first hash value 9, the first hash value 10) obtains the corresponding second hash value 3; that is, the first hash value is used as the current hash value, and the following operations are performed cyclically , until the number of the current hash values is 1: from the at least three current hash values, select a set number of current hash values respectively, and generate an intermediate hash value based on the selected set number of current hash values. Hash value, perform the blockchain on-chain operation on the intermediate hash value, and obtain the corresponding second hash value from the blockchain; when there is the current hash value that has not been selected and has not been selected When the number of the selected current hash values is less than the set number, generate an intermediate hash value based on the unselected current hash value, and perform blockchain on-chain on the intermediate hash value operation, and obtain the corresponding second hash value from the blockchain; use the second hash value as the current hash value; the set number is an integer greater than 2.

Step S303: Obtain the root hash value.

Specifically, according to the steps of step S302, it can be seen that there are three second hash values in level 2, and the second hash values are used as the current hash value; and the operation of step S302 is further performed to obtain the The second hash value; because the number of the second hash value (current hash value) is 1, the current hash value is used as the root hash value; it can be understood that the number of levels of the multi-fork tree is set Determined by the number of file compression package hash values (first hash value); and the number of file compression package hash values is related to the number of files related to the generated business. The number of values (first hash values) is not limited.

As shown in FIG. 4 , an embodiment of the present invention provides a method for obtaining a shared file based on a hash value of a multi-tree structure, and the method may include the following steps:

The following steps S401-step S403 take the example described in steps S301-step S303 as an example to illustrate the method for obtaining a shared file based on a hash value of a multi-tree structure;

Step S401: According to the current hash value (root hash value).

Specifically, the current hash value is received; it is determined that a file compression package hash value that is the same as the current hash value exists on the blockchain; as shown in FIG. 4 , it is determined that the blockchain does not exist on the blockchain. The hash value of the file compressed package with the same current hash value, that is, the current hash value is not the hash value of the file compressed package, then determine the set number of lower-level hash values corresponding to the current hash value, and Take the lower-level hash value as the current hash value; the lower-level hash values of the current hash value are respectively lower-level hash value 1, lower-level hash value 2, and lower-level hash value 3; Hash value as the current hash value.

Step S402-Step S403: Circularly execute the acquisition of the lower-level hash value.

The following describes an example of the process of traversing the hash values of each layer below the root hash value and obtaining the file compressed package through steps S402-step S403; specifically, as shown in FIG. Lower-level hash value 2, lower-level hash value 3); determine that there is no same hash value (lower-level hash value 1, lower-level hash value 2, lower-level hash value 3) with the current hash value (lower-level hash value 1, lower-level hash value 3) on the blockchain file compression package hash value; then determine each subordinate hash value corresponding to the current hash value, and use the subordinate hash value as the current hash value, for example: determine each subordinate hash value corresponding to 1 The sub-hash value is sub-hash value 1-sub-hash value 4; determine that each sub-hash value corresponding to sub-hash value 2 is sub-hash value 5-sub-hash value 8; determine that sub-hash value 3 corresponds to Each sub-hash value of the lower-level hash value is 9 and the lower-level hash value is 10; The same file compression package hash value; the file compression package corresponding to the current hash value is obtained from the blockchain; respectively, the file compression package 1-file compression package 10. That is, receive the current hash value; cyclically execute the following steps until the file compressed package corresponding to the current hash value is obtained; determine that there is a file compressed package that is the same as the current hash value on the blockchain If yes, execute A1; otherwise, execute A2; A1: Obtain the file compressed package corresponding to the current hash value from the blockchain; A2: Determine each subordinate hash value corresponding to the current hash value Hash value, and use the lower-level hash value as the current hash value.

Further, obtaining the file compressed package corresponding to the current hash value includes: obtaining the file compressed package corresponding to the current hash value, performing decompression and decryption operations on the file compressed package, and obtaining the compressed file in the file compressed package. Specifically, for each obtained file compressed package, decompression and decryption operations are performed, and the decompression and decryption methods correspond to the compression and encryption methods.

It can be understood that the level of the set number of fork trees is determined by the number of hash values of the file compressed package and the number of settings; and the number of hash values of the file compressed package is related to the number of files related to the generated business. The number and the number of hash values of file archives are not limited.

As shown in FIG. 6 , an embodiment of the present invention provides a process for sharing files, and the process includes the following steps:

As shown in Fig. 6 , the process of uploading the shared file on the chain is described using steps S601-S603; the process of obtaining the shared file by the shared file acquirer is described using steps S604-step S605; At the bank headquarters, the acquirer of the shared file may be an enterprise directly related to the shared file in business, for example: Bank 1, Bank 2, Bank 3, etc.

Step S601: Acquire files to be shared, and form multiple file compression packages.

Performing a blockchain on-chain operation on the file compressed package, and obtaining at least three first hash value descriptions corresponding to the file compressed package from the blockchain is consistent with step S101, and will not be repeated here. Further, acquiring files to be shared to form multiple file compression packages includes: acquiring files to be shared within a predefined time range, forming at least three file packages, and determining the number of files in the file packages according to network bandwidth. Further, compression and encryption operations are respectively performed on the file package to form the file compression package. A concurrent blockchain uploading operation is performed on the file compressed package.

Step S602: Take the first hash value as the current hash value, and perform the following operations cyclically until the number of the current hash values is 1: from the at least three current hash values, select and set respectively A number of current hash values, an intermediate hash value is generated based on the selected set number of current hash values, the blockchain on-chain operation is performed on the intermediate hash value, and the corresponding second hash value is obtained from the blockchain. Hash value; when there is the current hash value that has not been selected and the number of the current hash value that has not been selected is less than the set number, based on the current hash value that has not been selected Generate an intermediate hash value from the hash value, perform a blockchain on-chain operation on the intermediate hash value, and obtain a corresponding second hash value from the blockchain; use the second hash value as the current hash value. Greek value; the set number is an integer greater than 2.

Specifically, the description about obtaining the root hash value through circulation is consistent with step S102, and details are not repeated here.

Step S603: Use the current hash value as the root hash value, and send the hash value.

Specifically, the description about sending the root hash value is consistent with step S103, and details are not repeated here.

Step S604: Receive the current hash value; perform the following steps in a loop until the file compressed package corresponding to the current hash value is obtained; determine that a file compressed package with the same current hash value exists on the blockchain Hash value, if yes, execute A1; otherwise, execute A2; A1: Obtain the file compressed package corresponding to the current hash value from the blockchain; A2: Determine each subordinate corresponding to the current hash value hash value, and use the lower-level hash value as the current hash value.

Specifically, the description about obtaining each subordinate hash value corresponding to the root hash value according to the root hash value is consistent with step S201, and will not be repeated here; further, obtaining the corresponding hash value of the current hash value The file compression package includes: obtaining the file compression package corresponding to the current hash value, performing decompression and decryption operations on the file compression package, and obtaining the files in the file compression package.

As shown in FIG. 7, an embodiment of the present invention provides an apparatus 700 for sharing files, including: a file compressed package uploading module 701, a node hash value obtaining module 702, and a root hash value obtaining module 703; wherein,

The file compression package uploading module 701 is used to obtain files to be shared to form multiple file compression packages; perform blockchain chaining operation on the file compression package, and obtain the file compression package from the blockchain corresponding at least three first hash values;

The upper-level hash value obtaining module 702 is configured to use the first hash value as the current hash value, and perform the following operations cyclically until the number of the current hash values is 1: from the at least three current hash values Among the hash values, a set number of current hash values are respectively selected, an intermediate hash value is generated based on the selected set number of current hash values, the blockchain on-chain operation is performed on the intermediate hash values, and Obtain the corresponding second hash value from the blockchain; when there is the current hash value that has not been selected, and the number of the current hash value that has not been selected is less than the set number, based on The current hash value that has not been selected generates an intermediate hash value, performs a blockchain on-chain operation on the intermediate hash value, and obtains a corresponding second hash value from the blockchain; Two hash values are used as the current hash value; the set number is an integer greater than 2;

The root hash value obtaining module 703 is configured to use the current hash value as the root hash value and send the hash value.

Optionally, the file compression package on-chain module 701 is further configured to acquire files to be shared and form multiple file compression packages, including: acquiring files to be shared within a predefined time range to form at least three file packages, Determine the number of files in the file package according to the network bandwidth.

Optionally, the file compression package uploading module 701 is further configured to perform compression and encryption operations on the file package respectively to form the file compression package.

Optionally, the file compressed package on-chain module 701 is further configured to perform a blockchain concurrent on-chain operation on the file compressed package.

As shown in FIG. 8 , an embodiment of the present invention provides an apparatus 800 for sharing files, including: a module 801 for obtaining on-chain files; wherein,

The on-chain file acquisition module 801 is configured to receive the current hash value; cyclically execute the following steps until a file compressed package corresponding to the current hash value is acquired; The hash value of the file compressed package with the same hash value, if yes, execute A1; otherwise, execute A2; A1: obtain the file compressed package corresponding to the current hash value from the blockchain; A2: determine the each lower-level hash value corresponding to the current hash value, and the lower-level hash value is used as the current hash value.

Optionally, the obtaining on-chain file module 801 is further configured to obtain the file compressed package corresponding to the current hash value, including: obtaining the file compressed package corresponding to the current hash value, The compressed package performs decompression and decryption operations to obtain the files in the file compressed package.

An embodiment of the present invention also provides an electronic device for sharing files, including: one or more processors; and a storage device for storing one or more programs, when the one or more programs are stored by the one or more programs Each processor executes, so that the one or more processors implement the method provided by any one of the foregoing embodiments.

An embodiment of the present invention further provides a computer-readable medium, on which a computer program is stored, and when the program is executed by a processor, implements the method provided by any of the foregoing embodiments.

FIG. 10 shows an exemplary system architecture 1000 of a method for sharing a file or an apparatus for sharing a file to which an embodiment of the present invention can be applied.

As shown in FIG. 10 , the system architecture 1000 may include terminal devices 1001 , 1002 , and 1003 , a network 1004 and a server 1005 . The network 1004 is a medium used to provide a communication link between the terminal devices 1001 , 1002 , 1003 and the server 1005 . The network 1004 may include various connection types, such as wired, wireless communication links, or fiber optic cables, among others.

The user can use the terminal devices 1001, 1002, 1003 to interact with the server 1005 through the network 1004 to receive or send messages and the like. Various client applications may be installed on the terminal devices 1001 , 1002 and 1003 , such as enterprise application clients, web browser applications, search applications, instant messaging tools, and email clients.

The terminal devices 1001, 1002, 1003 may be various electronic devices having a display screen and supporting the running of various client applications, including but not limited to smart phones, tablet computers, laptops and desktop computers, and the like.

The server 1005 may be a server that provides various services, for example, a background management server that provides support for the user's request for obtaining files by using the terminal devices 1001 , 1002 , and 1003 . The background management server can upload and store the file to be shared, process the request for obtaining the file, and return the file to the terminal device.

It should be noted that the method for sharing files provided in the embodiments of the present invention is generally executed by the server 1005 , and accordingly, the apparatus for sharing files is generally set in the server 1005 .

It should be understood that the numbers of terminal devices, networks and servers in FIG. 10 are only illustrative. There can be any number of terminal devices, networks and servers according to implementation needs.

Referring to FIG. 11 below, it shows a schematic structural diagram of a computer system 1100 suitable for implementing a terminal device according to an embodiment of the present invention. The terminal device shown in FIG. 11 is only an example, and should not impose any limitations on the functions and scope of use of the embodiments of the present invention.

As shown in FIG. 11, a computer system 1100 includes a central processing unit (CPU) 1101, which can be loaded into a random access memory (RAM) 1103 according to a program stored in a read only memory (ROM) 1102 or a program from a storage section 1108 Instead, various appropriate actions and processes are performed. In the RAM 1103, various programs and data necessary for the operation of the system 1100 are also stored. The CPU 1101 , the ROM 1102 , and the RAM 1103 are connected to each other through a bus 1104 . An input/output (I/O) interface 1105 is also connected to the bus 1104 .

The following components are connected to the I/O interface 1105: an input section 1106 including a keyboard, a mouse, etc.; an output section 1107 including a cathode ray tube (CRT), a liquid crystal display (LCD), etc., and a speaker, etc.; a storage section 1108 including a hard disk, etc. ; and a communication section 1109 including a network interface card such as a LAN card, a modem, and the like. The communication section 1109 performs communication processing via a network such as the Internet. Drivers 1110 are also connected to I/O interface 1105 as needed. A removable medium 1111, such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc., is mounted on the drive 1110 as needed so that a computer program read therefrom is installed into the storage section 1108 as needed.

In particular, the processes described above with reference to the flowcharts may be implemented as computer software programs in accordance with the disclosed embodiments of the present invention. For example, embodiments disclosed herein include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing program code for performing the method illustrated in the flowchart. In such an embodiment, the computer program may be downloaded and installed from the network via the communication portion 1109, and/or installed from the removable medium 1111. When the computer program is executed by the central processing unit (CPU) 1101, the above-described functions defined in the system of the present invention are executed.

It should be noted that the computer-readable medium shown in the present invention may be a computer-readable signal medium or a computer-readable storage medium, or any combination of the above two. The computer-readable storage medium can be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus or device, or a combination of any of the above. More specific examples of computer readable storage media may include, but are not limited to, electrical connections with one or more wires, portable computer disks, hard disks, random access memory (RAM), read only memory (ROM), erasable Programmable read only memory (EPROM or flash memory), fiber optics, portable compact disk read only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing. In the present invention, a computer-readable storage medium may be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system, apparatus, or device. In the present invention, however, a computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, carrying computer-readable program code therein. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the foregoing. A computer-readable signal medium can also be any computer-readable medium other than a computer-readable storage medium that can transmit, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device . Program code embodied on a computer readable medium may be transmitted using any suitable medium including, but not limited to, wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

The flowchart and block diagrams in the Figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code that contains one or more logical functions for implementing the specified functions executable instructions. It should also be noted that, in some alternative implementations, the functions noted in the blocks may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It is also noted that each block of the block diagrams or flowchart illustrations, and combinations of blocks in the block diagrams or flowchart illustrations, can be implemented in special purpose hardware-based systems that perform the specified functions or operations, or can be implemented using A combination of dedicated hardware and computer instructions is implemented.

The modules and/or units involved in the embodiments of the present invention may be implemented in a software manner, and may also be implemented in a hardware manner. The described modules and/or units can also be provided in the processor, for example, it can be described as: a processor includes a file compression package uploading module, a node hash value obtaining module and a root hash value obtaining module; wherein, The names of these modules do not limit the module itself under certain circumstances. For example, the node hash value acquisition module can also be described as "performing the blockchain on-chain operation on the first hash value of the file compressed package. , and a module that gets the second hash from the blockchain". It can also be described as: a processor includes a module for obtaining files on the chain; wherein the names of these modules do not constitute a limitation of the module itself under certain circumstances, for example, the module for obtaining files on the chain can also be described as " According to the root hash value, obtain the file compression package hash value on the blockchain, and obtain the module of the files contained in the file compression package according to the file compression package hash value".

As another aspect, the present invention also provides a computer-readable medium, which may be included in the device described in the above embodiments; or may exist alone without being assembled into the device. The above-mentioned computer-readable medium carries one or more programs, and when the above-mentioned one or more programs are executed by a device, the device includes: acquiring files to be shared, forming a plurality of file compression packages; compressing the files The package performs the blockchain on-chain operation, and obtains at least three first hash values corresponding to the file compression package from the blockchain; the first hash value is used as the current hash value, and the following operations are performed cyclically: Until the number of the current hash values is 1: from the at least three current hash values, select a set number of current hash values respectively, and generate an intermediate hash value based on the selected set number of current hash values. Hash value, perform the blockchain on-chain operation on the intermediate hash value, and obtain the corresponding second hash value from the blockchain; when there is the current hash value that has not been selected and has not been selected When the number of the current hash values that have been passed is less than the set number, an intermediate hash value is generated based on the current hash value that has not been selected, and the blockchain on-chain operation is performed on the intermediate hash value , and obtain the corresponding second hash value from the blockchain; take the second hash value as the current hash value; the set number is an integer greater than 2; take the current hash value as root hash, and send said hash. Receive the current hash value; perform the following steps in a loop until the file compressed package corresponding to the current hash value is obtained; determine that there is a file compressed package hash value that is the same as the current hash value on the blockchain , if yes, execute A1; otherwise, execute A2; A1: Obtain the file compressed package corresponding to the current hash value from the blockchain; A2: Determine each lower-level hash value corresponding to the current hash value , and use the lower-level hash value as the current hash value.

According to the technical solution of the embodiment of the present invention, by compressing a plurality of files into a file compressed package, the technical problem that the network resource burden is too high due to the large number of files is partially overcome. The efficiency of file chaining and sharing is improved; the root hash value is stored and shared by using the bifurcated tree structure, and the shared file is obtained through the root hash value to improve the security of the file.

The above-mentioned specific embodiments do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may occur depending on design requirements and other factors. Any modifications, equivalent replacements and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (11)

1. a method for sharing files, is characterized in that, comprises: Obtain the files to be shared and form multiple file compression packages; performing a blockchain on-chain operation on the file compressed package, and obtaining at least three first hash values corresponding to the file compressed package from the blockchain; Taking the first hash value as the current hash value, the following operations are performed cyclically until the number of the current hash values is 1: from the at least three current hash values, a set number of current hash values are selected respectively. Hash value, generate an intermediate hash value based on the selected set number of current hash values, perform the blockchain on-chain operation on the intermediate hash value, and obtain the corresponding second hash value from the blockchain ; When there is the current hash value that has not been selected, and the number of the current hash value that has not been selected is less than the set number, generate based on the current hash value that has not been selected. an intermediate hash value, performing a blockchain on-chain operation on the intermediate hash value, and obtaining a corresponding second hash value from the blockchain; using the second hash value as the current hash value; The set number is an integer greater than 2; The current hash value is used as the root hash value, and the hash value is sent. 2. The method according to claim 1, wherein Obtain the files to be shared and form multiple file compression packages, including: Obtain files to be shared within a predefined time range, form at least three file packages, and determine the number of files in the file packages according to network bandwidth. 3. The method of claim 2, wherein Compressing and encrypting the file package are respectively performed to form the file compression package. 4. The method of claim 1, wherein A concurrent blockchain uploading operation is performed on the file compressed package. 5. A method for sharing files, comprising: Receive the current hash value; cyclically execute the following steps until the file compressed package corresponding to the current hash value is obtained; Determine that there is a file compression package hash value that is the same as the current hash value on the blockchain, and if so, execute A1; otherwise, execute A2; A1: Obtain the file compressed package corresponding to the current hash value from the blockchain; A2: Determine each lower-level hash value corresponding to the current hash value, and use the lower-level hash value as the current hash value. 6. The method of claim 5, wherein Obtain the file compressed package corresponding to the current hash value, including: Obtain the file compressed package corresponding to the current hash value, perform decompression and decryption operations on the file compressed package, and obtain the files in the file compressed package. 7. A device for sharing files, comprising: a file compression package uploading module, a node hash value obtaining module and a root hash value obtaining module; wherein, The file compression package uploading module is used to obtain the files to be shared to form a plurality of file compression packages; perform the blockchain chaining operation on the file compression package, and obtain the corresponding file compression package from the blockchain at least three first hash values of ; The upper-level hash value acquisition module is configured to use the first hash value as the current hash value, and perform the following operations cyclically until the number of the current hash values is 1: from the at least three current hash values Among the values, a set number of current hash values are respectively selected, an intermediate hash value is generated based on the selected set number of current hash values, the blockchain on-chain operation is performed on the intermediate hash value, and the The blockchain obtains the corresponding second hash value; when there is the current hash value that has not been selected, and the number of the current hash value that has not been selected is less than the set number, based on the unselected current hash value The selected current hash value generates an intermediate hash value, performs a blockchain on-chain operation on the intermediate hash value, and obtains a corresponding second hash value from the blockchain; The hash value is used as the current hash value; the set number is an integer greater than 2; The root hash value obtaining module is configured to use the current hash value as the root hash value and send the hash value. 8. A device for sharing files, comprising: acquiring a file module on a chain; wherein, The module for obtaining the file on the chain is used to receive the current hash value; the following steps are performed cyclically until the file compressed package corresponding to the current hash value is obtained; The hash value of the file compressed package with the same value, if yes, execute A1; otherwise, execute A2; A1: Obtain the file compressed package corresponding to the current hash value from the blockchain; A2: Determine the current each lower-level hash value corresponding to the hash value, and the lower-level hash value is used as the current hash value. 9 . A system for sharing files, comprising: the device for sharing files according to claim 7 and the device for sharing files according to claim 8 . 10. An electronic device, comprising: one or more processors; storage means for storing one or more programs, The one or more programs, when executed by the one or more processors, cause the one or more processors to implement the method of any one of claims 1-4 or 5-6. 11. A computer-readable medium on which a computer program is stored, characterized in that, when the program is executed by a processor, the method according to any one of claims 1-4 or 5-6 is implemented.

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