CN111147502A - Block chain file storage system and method thereof - Google Patents
Block chain file storage system and method thereof Download PDFInfo
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- CN111147502A CN111147502A CN201911395576.1A CN201911395576A CN111147502A CN 111147502 A CN111147502 A CN 111147502A CN 201911395576 A CN201911395576 A CN 201911395576A CN 111147502 A CN111147502 A CN 111147502A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
- H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
- H04L63/0442—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload wherein the sending and receiving network entities apply asymmetric encryption, i.e. different keys for encryption and decryption
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/60—Protecting data
- G06F21/62—Protecting access to data via a platform, e.g. using keys or access control rules
- G06F21/6209—Protecting access to data via a platform, e.g. using keys or access control rules to a single file or object, e.g. in a secure envelope, encrypted and accessed using a key, or with access control rules appended to the object itself
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/06—Protocols specially adapted for file transfer, e.g. file transfer protocol [FTP]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
- H04L9/0861—Generation of secret information including derivation or calculation of cryptographic keys or passwords
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Abstract
The invention discloses a block chain file storage system and a method thereof, which are applied to a scene that a user uploads a file to a block chain for storage, wherein the storage system comprises an uploading subsystem, a block chain management subsystem and a file management subsystem, wherein the uploading subsystem comprises: the file uploading module and the file conversion module; the block chain management subsystem comprises: the device comprises an address generation module, a public and private key generation module and a file chaining module; the file management submodule comprises: the file query module and the file decryption module. The invention can realize the safe storage of the files, and the files are all stored on the block chain, thereby avoiding the malicious deletion and modification by a third party, effectively reducing the storage cost and being a perfect substitute of the traditional network disk.
Description
Technical Field
The invention relates to the field of blockchain file storage, in particular to a blockchain file storage system and a blockchain file storage method.
Background
Nowadays, blockchain technology applications have been extended to a number of areas of file storage, digital finance, internet of things, intelligent manufacturing, supply chain management, digital asset transactions, and so on. Currently, major countries around the world are accelerating the development of the layout blockchain technology. China has good foundation in the block chain field, and needs to accelerate the promotion of block chain technology and industrial innovation development and actively promote the block chain and economic and social fusion development.
The traditional network disk file storage technology depends on centralized service, the security of uploaded files cannot be guaranteed, and the risks of deletion and viewing exist.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a real safe and reliable block chain file storage system and a method thereof so as to improve the reliability and effectiveness of the application of the block chain technology and greatly reduce the cost of file storage.
The invention adopts the following technical scheme for solving the technical problems:
the invention relates to a block chain file storage system which is characterized in that the system is applied to a scene that a user uploads a file to a block chain for storage; the blockchain file storage system comprises: the system comprises an uploading subsystem, a block chain management subsystem and a file management subsystem;
the upload subsystem comprises: the file uploading module and the file conversion module;
the blockchain management subsystem comprises: the device comprises an address generation module, a public and private key generation module and a file chaining module;
the file management submodule comprises: the file query module and the file decryption module;
after the address generation module acquires an address application proposed by a user, a block chain address and an address private key required by the user are generated and recorded as a user address Addr and an address private key FromK;
the public and private key generation module generates an asymmetric public key and a private key of a user after receiving a key request of the user, and records the asymmetric public key and the private key as a public key Pub and a private key Pri of the user;
the file uploading module receives all files uploaded by a user and attribute information used for building block chain transaction, and the file uploading module comprises the following steps: the user address Addr, the address private key FromK, the public key Pub of the user and the private key Pri;
the file conversion module converts a file uploaded by a user into a data format storable on a block chain;
the file uplink module acquires a file with a converted format, stores the file in a block chain transaction associated with the user address Addr, and encrypts the file by using the block chain to obtain an encrypted file;
setting attribute information on the blockchain transaction comprises: the system comprises a transaction initiating address From, a private key FromKey of the transaction initiating address, an asymmetric public key PravateFrom used for transaction initiation, an asymmetric private key PravateFromKey used for transaction initiation, a transaction receiving address To, an asymmetric public key PravateFor used for transaction reception and transaction auxiliary data Input;
the file uplink module specifies in the attribute information of the blockchain transaction: the transaction initiation address From is an address Addr of a user, a private key fromke of the transaction initiation address is an address private key FromK of the user, the transaction initiation uses an asymmetric public key PrivateFrom as a public key Pub of the user, an asymmetric private key privatefromke used for the transaction initiation is a private key Pri of the user, a transaction receiving address To is an address Addr of the user, an asymmetric public key PrivateFor used for the transaction receiving is a public key Pub of the user, and transaction accessory data Input is a file with a converted format;
the file chain loading module submits a block chain transaction number TranHash obtained by block chain transaction and returns the block chain transaction number TranHash to a user, so that a file storage process is completed;
after the file query module receives a block chain transaction number TranHash submitted by a user, querying whether a corresponding transaction exists on a block chain or not, and if not, returning to fail; if the encrypted file exists, acquiring a data index Hash of the encrypted file through the block chain transaction number TranHash, and submitting the data index Hash to the file decryption module together with a public key Pub and a private key Pri of a user;
and the file decryption module queries the encrypted file on the block chain by using the data index Hash of the encrypted file, decrypts the file by using a public key Pub and a private key Pri of the user, returns a null file if decryption fails, and returns the decrypted original file to the user if decryption succeeds.
The block chain file storage system of the present invention is also characterized in that the file conversion module converts the file according to the following process:
the file conversion module reads a file uploaded by a user and converts the file into binary data, and then the binary data is compressed, so that the file with the converted format is obtained.
The invention relates to a block chain file storage method which is characterized by being applied to a platform for uploading files to a block chain for storage by a user and comprising the following steps:
step 1: the user submits an address application to a platform, and the platform generates a block chain address and a corresponding address private key which are recorded as an address Addr and an address private key FromK;
step 2, the user submits a key request to a platform, and the platform generates a public key and a private key required by encryption and records the public key and the private key as a public key Pub and a private key Pri;
and step 3: the user uploads a file to be stored to a platform, and the platform converts the file uploaded by the user into a data format which can be stored on a block chain and records the data format as the file after format conversion;
step 4, the platform stores the file after format conversion on the blockchain transaction associated with the user address Addr, and the blockchain performs encryption processing to obtain an encrypted file;
step 5, the platform sets attribute information on the blockchain transaction, including: the system comprises a transaction initiating address From, a private key FromKey of the transaction initiating address, an asymmetric public key PravateFrom used for transaction initiation, an asymmetric private key PravateFromKey used for transaction initiation, a transaction receiving address To, an asymmetric public key PravateFor used for transaction reception and transaction auxiliary data Input;
step 6, the platform appoints in the attribute information of the block chain transaction:
the transaction initiation address From is an address Addr of a user, a private key fromke of the transaction initiation address is an address private key FromK of the user, the transaction initiation uses an asymmetric public key PrivateFrom as a public key Pub of the user, an asymmetric private key privatefromke used for the transaction initiation is a private key Pri of the user, a transaction receiving address To is an address Addr of the user, an asymmetric public key PrivateFor used for the transaction receiving is a public key Pub of the user, and transaction accessory data Input is data after file conversion;
and 7: the platform submits the block chain transaction number TranHash obtained by the block chain transaction and returns the block chain transaction number TranHash to the user, so that file storage is completed;
and 8: the platform receives a block chain transaction number TranHash submitted by a user, inquires whether related transactions exist on a block chain, and returns failure if the related transactions do not exist; if so, executing step 9;
and step 9: and the platform acquires the data index Hash of the encrypted file through the block chain transaction number TranHash, inquires the encrypted file on the block chain, decrypts the encrypted file through the public key Pub and the private key Pri of the user, returns a null if the decryption fails, and returns the decrypted original file to the user if the decryption succeeds, thereby completing the file downloading process.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention ensures the privacy and the non-tampering property of the data by using the block chain technology, and realizes the non-tampering of the file.
2. The invention utilizes the asymmetric encryption algorithm to encrypt the data to the block chain, and the public and private keys used by the asymmetric encryption algorithm are completely kept on the hand of the user, thereby realizing that the file can not be deleted and stolen.
3. The invention realizes the safe storage of the files, and the files are all stored on the block chain, thereby avoiding the malicious deletion and modification by a third party, effectively reducing the storage cost and being a perfect substitute of the traditional network disk.
Drawings
FIG. 1 is a timing diagram illustrating a file upload process according to the present invention;
FIG. 2 is a timing diagram of file downloading according to the present invention.
Detailed Description
In this embodiment, as shown in fig. 1, a block chain file storage system is applied to a scenario where a user uploads a file to a block chain for storage; the block chain file storage system comprises: the system comprises an uploading subsystem, a block chain management subsystem and a file management subsystem;
the uploading subsystem comprises: the file uploading module and the file conversion module;
the block chain management subsystem comprises: the device comprises an address generation module, a public and private key generation module and a file chaining module;
the file management submodule comprises: the file query module and the file decryption module;
after acquiring an address application proposed by a user, an address generation module generates a block chain address and an address private key required by the user, and records the block chain address and the address private key as a user address Addr and an address private key FromK;
the public and private key generation module generates an asymmetric public key and a private key of a user after receiving a key request of the user, and records the asymmetric public key and the private key as a public key Pub and a private key Pri of the user;
the file uploading module receives all files uploaded by a user and attribute information used for building block chain transaction, and the file uploading module comprises the following steps: the user address Addr, the address private key FromK, the public key Pub of the user and the private key Pri;
the file conversion module converts a file uploaded by a user into binary data, and then compresses the binary data to obtain a data format storable on the block chain;
the file uplink module acquires the file after format conversion, stores the file in a block chain transaction associated with the user address Addr, and encrypts the file by using the block chain to obtain an encrypted file;
setting attribute information on blockchain transactions includes: the system comprises a transaction initiating address From, a private key FromKey of the transaction initiating address, an asymmetric public key PravateFrom used for transaction initiation, an asymmetric private key PravateFromKey used for transaction initiation, a transaction receiving address To, an asymmetric public key PravateFor used for transaction reception and transaction auxiliary data Input;
the document uplink module specifies in the attribute information of the blockchain transaction: the method comprises the steps that a transaction initiation address From is an address Addr of a user, a private key FromKey of the transaction initiation address is an address private key FromK of the user, an asymmetric public key PrivateFrom is used for initiating transaction as a public key Pub of the user, the asymmetric private key PrivateFromKey used for initiating transaction is a private key Pri of the user, a transaction receiving address To is the address Addr of the user, the asymmetric public key PrivateFor used for receiving transaction is a public key Pub of the user, and transaction auxiliary data Input is a file with a converted format;
the file chain loading module submits the block chain transaction number TranHash obtained by the block chain transaction and returns the block chain transaction number TranHash to the user, so that the file storage process is completed;
as shown in fig. 2, after receiving a block chain transaction number TranHash submitted by a user, a file query module queries whether a corresponding transaction exists on a block chain, and if not, returns a failure; if the encrypted file exists, acquiring the data index Hash of the encrypted file through the block chain transaction number TranHash, and submitting the data index Hash to a file decryption module together with a public key Pub and a private key Pri of a user;
the file decryption module queries the encrypted file on the block chain through the data index Hash of the encrypted file, decrypts the file through a public key Pub and a private key Pri of a user, returns a null if decryption fails, and returns the decrypted original file to the user if decryption succeeds.
In this embodiment, a block chain file storage method is applied to a scenario where a user uploads a file to a block chain for storage, and is performed according to the following steps:
step 1: a user submits an address application to a platform, and the platform generates a block chain address and a corresponding address private key which are recorded as an address Addr and an address private key FromK;
step 2, the user submits a key request to the platform, and the platform generates a public key and a private key required by encryption and records the public key and the private key as a public key Pub and a private key Pri;
and step 3: a user uploads a file to be stored to a platform, the platform converts the file uploaded by the user into a data format which can be stored on a block chain, the data format is recorded as a file after format conversion, the file is converted into binary data, and then the binary data is compressed, so that the file after format conversion is obtained;
step 4, the platform stores the file after format conversion on the blockchain transaction associated with the user address Addr, and the blockchain performs encryption processing to obtain an encrypted file;
step 5, the platform sets attribute information on the blockchain transaction, including: the system comprises a transaction initiating address From, a private key FromKey of the transaction initiating address, an asymmetric public key PravateFrom used for transaction initiation, an asymmetric private key PravateFromKey used for transaction initiation, a transaction receiving address To, an asymmetric public key PravateFor used for transaction reception and transaction auxiliary data Input;
step 6, the platform appoints in the attribute information of the block chain transaction:
the method comprises the steps that a transaction initiation address From is an address Addr of a user, a private key FromKey of the transaction initiation address is an address private key FromK of the user, an asymmetric public key PrivateFrom is used for initiating transaction as a public key Pub of the user, the asymmetric private key PrivateFromKey used for initiating transaction is a private key Pri of the user, a transaction receiving address To is the address Addr of the user, the asymmetric public key PrivateFor used for receiving transaction is the public key Pub of the user, and transaction auxiliary data Input is data after file conversion;
and 7: the platform submits the block chain transaction number TransHash obtained by the block chain transaction and returns the block chain transaction number TransHash to the user, so that file storage is completed, as shown in FIG. 1;
and 8: the platform receives a block chain transaction number TranHash submitted by a user, inquires whether related transactions exist on a block chain or not, and returns failure if the related transactions do not exist; if so, executing step 9;
and step 9: the platform obtains the data index Hash of the encrypted file through the block chain transaction number TranHash, queries the encrypted file on the block chain, decrypts the encrypted file through the public key Pub and the private key Pri of the user, returns a null if the decryption fails, and returns the decrypted original file to the user if the decryption succeeds, so that the file downloading process is completed, as shown in fig. 2.
Claims (3)
1. A block chain file storage system is characterized in that the system is applied to a scene that a user uploads a file to a block chain for storage; the blockchain file storage system comprises: the system comprises an uploading subsystem, a block chain management subsystem and a file management subsystem;
the upload subsystem comprises: the file uploading module and the file conversion module;
the blockchain management subsystem comprises: the device comprises an address generation module, a public and private key generation module and a file chaining module;
the file management submodule comprises: the file query module and the file decryption module;
after the address generation module acquires an address application proposed by a user, a block chain address and an address private key required by the user are generated and recorded as a user address Addr and an address private key FromK;
the public and private key generation module generates an asymmetric public key and a private key of a user after receiving a key request of the user, and records the asymmetric public key and the private key as a public key Pub and a private key Pri of the user;
the file uploading module receives all files uploaded by a user and attribute information used for building block chain transaction, and the file uploading module comprises the following steps: the user address Addr, the address private key FromK, the public key Pub of the user and the private key Pri;
the file conversion module converts a file uploaded by a user into a data format storable on a block chain;
the file uplink module acquires a file with a converted format, stores the file in a block chain transaction associated with the user address Addr, and encrypts the file by using the block chain to obtain an encrypted file;
setting attribute information on the blockchain transaction comprises: the system comprises a transaction initiating address From, a private key FromKey of the transaction initiating address, an asymmetric public key PravateFrom used for transaction initiation, an asymmetric private key PravateFromKey used for transaction initiation, a transaction receiving address To, an asymmetric public key PravateFor used for transaction reception and transaction auxiliary data Input;
the file uplink module specifies in the attribute information of the blockchain transaction: the transaction initiation address From is an address Addr of a user, a private key fromke of the transaction initiation address is an address private key FromK of the user, the transaction initiation uses an asymmetric public key PrivateFrom as a public key Pub of the user, an asymmetric private key privatefromke used for the transaction initiation is a private key Pri of the user, a transaction receiving address To is an address Addr of the user, an asymmetric public key PrivateFor used for the transaction receiving is a public key Pub of the user, and transaction accessory data Input is a file with a converted format;
the file chain loading module submits a block chain transaction number TranHash obtained by block chain transaction and returns the block chain transaction number TranHash to a user, so that a file storage process is completed;
after the file query module receives a block chain transaction number TranHash submitted by a user, querying whether a corresponding transaction exists on a block chain or not, and if not, returning to fail; if the encrypted file exists, acquiring a data index Hash of the encrypted file through the block chain transaction number TranHash, and submitting the data index Hash to the file decryption module together with a public key Pub and a private key Pri of a user;
and the file decryption module queries the encrypted file on the block chain by using the data index Hash of the encrypted file, decrypts the file by using a public key Pub and a private key Pri of the user, returns a null file if decryption fails, and returns the decrypted original file to the user if decryption succeeds.
2. The blockchain file storage system of claim 1, wherein the file transformation module transforms the file as follows:
the file conversion module reads a file uploaded by a user and converts the file into binary data, and then the binary data is compressed, so that the file with the converted format is obtained.
3. A block chain file storage method is characterized in that the method is applied to a platform for uploading files to a block chain for storage by a user and comprises the following steps:
step 1: the user submits an address application to a platform, and the platform generates a block chain address and a corresponding address private key which are recorded as an address Addr and an address private key FromK;
step 2, the user submits a key request to a platform, and the platform generates a public key and a private key required by encryption and records the public key and the private key as a public key Pub and a private key Pri;
and step 3: the user uploads a file to be stored to a platform, and the platform converts the file uploaded by the user into a data format which can be stored on a block chain and records the data format as the file after format conversion;
step 4, the platform stores the file after format conversion on the blockchain transaction associated with the user address Addr, and the blockchain performs encryption processing to obtain an encrypted file;
step 5, the platform sets attribute information on the blockchain transaction, including: the system comprises a transaction initiating address From, a private key FromKey of the transaction initiating address, an asymmetric public key PravateFrom used for transaction initiation, an asymmetric private key PravateFromKey used for transaction initiation, a transaction receiving address To, an asymmetric public key PravateFor used for transaction reception and transaction auxiliary data Input;
step 6, the platform appoints in the attribute information of the block chain transaction:
the transaction initiation address From is an address Addr of a user, a private key fromke of the transaction initiation address is an address private key FromK of the user, the transaction initiation uses an asymmetric public key PrivateFrom as a public key Pub of the user, an asymmetric private key privatefromke used for the transaction initiation is a private key Pri of the user, a transaction receiving address To is an address Addr of the user, an asymmetric public key PrivateFor used for the transaction receiving is a public key Pub of the user, and transaction accessory data Input is data after file conversion;
and 7: the platform submits the block chain transaction number TranHash obtained by the block chain transaction and returns the block chain transaction number TranHash to the user, so that file storage is completed;
and 8: the platform receives a block chain transaction number TranHash submitted by a user, inquires whether related transactions exist on a block chain, and returns failure if the related transactions do not exist; if so, executing step 9;
and step 9: and the platform acquires the data index Hash of the encrypted file through the block chain transaction number TranHash, inquires the encrypted file on the block chain, decrypts the encrypted file through the public key Pub and the private key Pri of the user, returns a null if the decryption fails, and returns the decrypted original file to the user if the decryption succeeds, thereby completing the file downloading process.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911395576.1A CN111147502A (en) | 2019-12-30 | 2019-12-30 | Block chain file storage system and method thereof |
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| CN201911395576.1A CN111147502A (en) | 2019-12-30 | 2019-12-30 | Block chain file storage system and method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111931219A (en) * | 2020-09-22 | 2020-11-13 | 支付宝(杭州)信息技术有限公司 | Data storage method and device and data query method and device |
| CN112184230A (en) * | 2020-10-14 | 2021-01-05 | 深圳壹账通智能科技有限公司 | Transaction data processing method, system, device and storage medium based on block chain |
| CN112486930A (en) * | 2020-11-13 | 2021-03-12 | 卓尔智联(武汉)研究院有限公司 | File uploading method, file querying method and electronic equipment |
-
2019
- 2019-12-30 CN CN201911395576.1A patent/CN111147502A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111931219A (en) * | 2020-09-22 | 2020-11-13 | 支付宝(杭州)信息技术有限公司 | Data storage method and device and data query method and device |
| CN111931219B (en) * | 2020-09-22 | 2021-04-23 | 支付宝(杭州)信息技术有限公司 | Data storage method and device and data query method and device |
| CN112184230A (en) * | 2020-10-14 | 2021-01-05 | 深圳壹账通智能科技有限公司 | Transaction data processing method, system, device and storage medium based on block chain |
| CN112486930A (en) * | 2020-11-13 | 2021-03-12 | 卓尔智联(武汉)研究院有限公司 | File uploading method, file querying method and electronic equipment |
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Application publication date: 20200512 |