CN114666353A - Electronic access evidence obtaining system and method based on block chain - Google Patents
Electronic access evidence obtaining system and method based on block chain Download PDFInfo
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- CN114666353A CN114666353A CN202210258734.4A CN202210258734A CN114666353A CN 114666353 A CN114666353 A CN 114666353A CN 202210258734 A CN202210258734 A CN 202210258734A CN 114666353 A CN114666353 A CN 114666353A
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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
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1097—Protocols in which an application is distributed across nodes in the network for distributed storage of data in networks, e.g. transport arrangements for network file system [NFS], storage area networks [SAN] or network attached storage [NAS]
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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
- H04L63/08—Network architectures or network communication protocols for network security for authentication of entities
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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
- H04L67/08—Protocols specially adapted for terminal emulation, e.g. Telnet
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/433—Content storage operation, e.g. storage operation in response to a pause request, caching operations
- H04N21/4334—Recording operations
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
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Abstract
The invention discloses an electronic evidence collection system and method based on a block chain, wherein the system comprises an evidence collection module and an evidence collection module; the evidence storage module comprises a first user login module, an identity authentication module, an evidence uploading module, an on-chain storage module and an off-chain storage module; the evidence obtaining module comprises a second user login module, a permission authentication module, an automatic evidence obtaining module and a screen recording evidence obtaining module. According to the invention, various evidences are uploaded through the evidence storage module, and the main body part of the file is stored in the distributed file system under the chain through the on-chain storage module and the off-chain storage module, so that the storage pressure of the block chain is reduced, and the storage efficiency of the system is improved. The operation of collecting evidence is carried out through the module of collecting evidence, filters illegal user through authority authentication module, through automatic collection evidence and record screen collection evidence, realizes the automatic download and the save of evidence to record the screen record to whole process of collecting evidence, with whole record process upload to the block chain in, thereby realize the legitimacy and the security of whole electron process of collecting evidence.
Description
Technical Field
The invention relates to an electronic access evidence obtaining system and method based on a block chain, and belongs to the technical field of electronic access evidence.
Background
The traditional electronic evidence is simply stored in a third party with public credibility after being encrypted, and information such as a time stamp and an operator is bound to prove the existence of source information. The third party is required to be trusting unconditionally in the processes of evidence storage, evidence collection and verification, so that the authority of the third party is too concentrated, and if the third party maliciously tampers or deletes data, the data cannot be checked, and the data cannot be guaranteed to be real and reliable. In contrast, the block chain storage certificate disperses the overlarge authority to all node participants through the chain structure and the distributed consensus mechanism of the block chain, so that the possibility that a third party with the overlarge authority maliciously destroys data is avoided.
However, the data management function provided by the blockchain is simple, the calculation amount is greatly consumed, and the storage capacity of the blockchain is stressed along with the gradual increase of the data amount. Moreover, even with the introduction of blockchains, further research is still needed to enhance the usability and security of electronic access forensics.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the electronic access evidence obtaining system and method based on the block chain are provided, the storage pressure of the block chain is reduced, and meanwhile the usability and the safety of electronic access evidence obtaining are enhanced.
The invention adopts the following technical scheme for solving the technical problems:
an electronic access evidence obtaining system based on a block chain comprises an evidence obtaining module, an HDFS (Hadoop distributed File System) and a Fast DFS (Fast distributed File System);
the evidence storage module comprises a first user login module, an identity verification module, an evidence uploading module, an on-chain storage module and an off-chain storage module;
the first user login module is used for logging in a user to be authenticated, and if the user to be authenticated is not registered, the first user login module is used for registering and then logging in;
the identity authentication module is used for authenticating identity information of a user when the user to be stored with the certificate logs in, and issuing identity attribute to a new registered user if the current user to be stored with the certificate is the new registered user;
the evidence uploading module is used for uploading the electronic evidence to the system by the user waiting for evidence storage;
the chain storage module is used for uploading the registered transaction certificate of the electronic evidence uploaded by the user with successful identity verification, including the hash abstract, the timestamp and the user digital signature of the electronic evidence, to the block chain;
the downlink storage module is used for uploading the electronic evidence with the size larger than the threshold value to the HDFS and uploading the electronic evidence with the size smaller than the threshold value to the Fast DFS according to the preset threshold value;
the evidence obtaining module comprises a second user login module, an authority authentication module, an automatic evidence obtaining module and a screen recording evidence obtaining module;
the second user login module is used for logging in the system by the user to be subjected to evidence obtaining to download the electronic evidence, and the electronic evidence is from the electronic evidence stored in the system by the user of the storage module;
the authority authentication module is used for carrying out authority authentication on a user to be authenticated who logs in the system and judging whether the user has downloading authority;
the automatic evidence obtaining module is used for automatically obtaining evidence according to an electronic evidence downloading request sent by the user to be proved when the authority authentication module judges that the user to be proved has the downloading authority;
the screen recording and evidence obtaining module is used for recording the whole evidence obtaining process when a user to be subjected to evidence obtaining is subjected to evidence obtaining, uploading the recording process to the block chain, storing the recording process in the block chain, and returning a certificate which is successful in chain linking of the screen recording, so that the legality of the whole evidence obtaining process can be verified conveniently.
As a preferred scheme of the present invention, the certificate storage module further comprises an encryption module, a certificate return module and an address return module;
the encryption module is used for encrypting the electronic evidence uploaded by the user to be authenticated;
the voucher returning module is used for returning voucher information successfully uploaded by the electronic evidence to the user to be credited after the electronic evidence is successfully uploaded to the system;
and the address returning module is used for returning the address storage information of the electronic evidence stored in the distributed file system to the user to be certified after the electronic evidence is uploaded to the HDFS or Fast DFS.
As a preferred scheme of the present invention, the evidence obtaining module further includes an evidence checking module, where the evidence checking module is configured to check validity and security of the evidence obtaining content requested by the user to be subjected to evidence obtaining, and if the evidence obtaining content is illegal or unsafe, the evidence obtaining operation cannot be performed, and if the evidence obtaining content is legal and safe, the evidence obtaining operation can be performed.
An electronic access evidence method based on the block chain-based electronic access evidence system, the method comprises an evidence storing method and an evidence obtaining method, wherein,
the certificate storage method comprises the following specific processes:
when the system is used for storing the evidence, a user to be stored with the evidence logs in the system through the first user login module, enters an evidence storing page of the system through the identity verification module, returns to an initial page for registration if the user does not log in successfully, continues to log in after the registration is successful, selects the electronic evidence needing to be uploaded to the system for manual uploading or designates a website needing to be collected for evidence to be automatically collected by the system; through an encryption module, a user to be stored with a certificate generates a key pair comprising a public key and a private key, wherein the private key is stored by the user, the public key is uploaded to a system by the user, and the user encrypts an electronic certificate to be uploaded through the private key, namely generates a digital signature; uploading the electronic evidence to a system by a user through an evidence uploading module; after the user uploads the electronic evidence, the system simultaneously starts an on-chain storage module and an off-chain storage module, packs the hash abstract, the current timestamp and the user digital signature of the electronic evidence into a transaction sheet, namely a transaction certificate, through the on-chain storage module, submits the transaction sheet to a consensus node in a block chain, and returns an electronic evidence uplink certificate to the user through a certificate return module; through a down-link storage module, a threshold for judging the size of the electronic evidence is preset by a system, when the electronic evidence is stored, the system calculates the size of the electronic evidence and judges the size of the electronic evidence and the preset threshold, if the size of the electronic evidence is larger than the threshold, the electronic evidence is uploaded to an HDFS (Hadoop distributed File System), if the size of the electronic evidence is smaller than the threshold, the electronic evidence is uploaded to a Fast DFS (distributed file system), and after the down-link storage is successful, a storage address of the electronic evidence is returned by an address return module; after the on-chain storage and the off-chain storage are successful, the system sends all storage addresses, timestamps and Hash digests of the electronic evidence to each node of the block chain for consensus storage;
the evidence obtaining method comprises the following specific processes:
when the user logs in, the right authentication module works to judge whether the user has the right to download the electronic evidence, if the user does not have the right, the login fails, if the user has the right, the login succeeds, and after the user succeeds, the user selects the content to be subjected to evidence collection and starts evidence collection; when a system detects a forensics request of a user, the evidence checking module is used for checking the required forensics content, if the forensics content is illegal or unsafe, forensics operation cannot be performed, if the forensics content is legal and safe, a forensics function in an intelligent contract in a block chain is triggered, an automatic forensics module is started, the system distributes a public key to the user according to the specific content of the user forensics request, and the user decrypts the electronic evidence through the public key after downloading so as to obtain complete electronic evidence; when carrying out automatic operation of collecting evidence, can trigger the record screen function in the intelligent contract in the block chain simultaneously, the module of collecting the screen is collected and is collected evidence and launch, records the whole process of collecting evidence automatically to in uploading the block chain to whole record, and can return the certificate of collecting the screen cochain success, be convenient for verify whole process of collecting evidence legitimacy.
Compared with the prior art, the invention adopting the technical scheme has the following technical effects:
1. the invention uploads various evidences through the evidence storage module, stores the main part of the file into the under-chain distributed file system through the on-chain storage module and the under-chain storage module, and the invention is provided with two distributed file systems, namely an HDFS (H distributed file system) and a Fast DFS (Fast DFS), wherein the HDFS is suitable for storing large files, the Fast DFS is suitable for storing small files, and the system is provided with a threshold value to determine which distributed file system the file is stored in.
2. According to the invention, evidence obtaining operation is carried out through the evidence obtaining module, illegal users are filtered through the authority authentication module, automatic downloading and saving of evidence are realized through the automatic evidence obtaining module and the screen recording evidence obtaining module, screen recording is carried out on the whole evidence obtaining process, and the whole screen recording process is uploaded to the block chain for saving, so that the legality and safety of the whole electronic evidence obtaining process are realized, and the usability, authenticity and legality of the electronic evidence are ensured.
Drawings
FIG. 1 is a schematic diagram of the system architecture of the present invention;
FIG. 2 is a schematic diagram of the operation of an on-chain memory module and an off-chain memory module of the present invention;
FIG. 3 is a schematic diagram of the operation of the encryption module of the present invention;
FIG. 4 is a schematic flow diagram of the forensics module of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
As shown in fig. 1, the present invention provides an electronic evidence-accessing system based on a block chain, which includes an evidence-accessing module, an HDFS and a Fast DFS.
The evidence storage module comprises a first user login module, an identity verification module, an evidence uploading module, an on-chain storage module and an off-chain storage module;
the first user login module is used for user login, and if the user is not registered, the first user login module registers firstly;
the identity authentication module is used for authenticating identity information of the user and issuing identity attributes for the unregistered user during registration;
the evidence uploading module is used for uploading owned electronic evidence to the system by a user;
the chain storage module is used for uploading transaction information of the electronic evidence uploaded by the registered user with successful identity verification, including structural data formed after the electronic evidence is uploaded to the system, stored business content and a file hash abstract, to the block chain by the system according to the data calculation of the file;
the down-link storage module is used for uploading the main part of the file to the distributed file system.
The evidence obtaining module comprises a second user login module, an authority authentication module, an automatic evidence obtaining module and a screen recording evidence obtaining module;
the second user login module is used for a user to log in the system and download electronic evidence, and the electronic evidence is from the evidence stored in the system by the user of the evidence storage module;
the authority authentication module is used for carrying out authority authentication on a user logging in the system and judging whether the user has the downloading authority;
the automatic evidence obtaining module is used for automatically obtaining evidence when a user sends a request for downloading the electronic evidence;
the screen recording and evidence obtaining module is used for recording the whole evidence obtaining process when a user obtains the evidence obtaining process, linking the recording process, namely uploading the recording process to a block chain, storing the recording process in the block chain, and returning a storage certificate so as to check the recording process later.
Furthermore, the certificate storage module also comprises an encryption module, a certificate return module and an address return module;
the encryption module is used for encrypting uploaded files, namely uploaded electronic evidences, and fig. 3 is a working schematic diagram of the encryption module;
the voucher returning module is used for returning voucher information which is successfully uploaded when the file is uploaded to the block chain;
the address returning module is used for returning the address storage information when the file is stored in the distributed file system.
Further, the evidence obtaining module also comprises an evidence checking module;
the evidence checking module is used for judging the legality and the safety of the evidence during evidence obtaining, so that the evidence cannot be downloaded if the evidence is illegal or unsafe, and the evidence can be downloaded if the evidence is checked successfully.
The implementation method of the electronic access evidence obtaining system comprises the following steps:
when the system is used for storing the evidence, a user firstly logs in the system, can enter an evidence storing page of the system through the identity verification module, needs to return to an initial page for registration if the user does not log in successfully, continues logging in after the registration is successful, selects the manual uploading of the evidence to be uploaded to the platform for storing the evidence, or designates a website to be subjected to evidence collection to be automatically collected by the system. Through the encryption module, a user can generate a secret key pair comprising a public key and a private key, wherein the private key is stored by the user, the public key is uploaded to the system by the user, and the user encrypts a file to be uploaded through the private key to generate a digital signature. And uploading the electronic evidence to the system by the user through the evidence uploading module. After the user uploads the evidence, the system first calculates the hash digest of the file for subsequent processing. The system simultaneously enables the on-chain storage module and the off-chain storage module. The hash abstract of the file, the current timestamp, the user digital signature and other information are packaged into a transaction sheet, namely a transaction certificate through chain storage, the transaction sheet is submitted to a consensus node, a chain link certificate of the file is returned to the user, and the user can inquire and download evidence on a chain through the certificate. Through a down-link storage module, a threshold value for judging the size of a file is set in advance by a system, when the file is stored, the system firstly calculates the size of the file, judges the size of the file and the preset threshold value, if the size of the file is larger than the set threshold value, the file is uploaded to an HDFS distributed file system, if the size of the file is smaller than the set threshold value, the file is uploaded to a Fast DFS distributed file system, after the down-link storage is successful, a storage address of the file is returned, and after all information of the file is uploaded successfully, all information of the storage address, a timestamp, a Hash abstract and the like of the file is sent to each node for common identification storage. When a subsequent user inquires or downloads a file through the uplink certificate, the system searches the storage transaction with the same abstract according to the hash abstract on the certificate, so as to find the storage address of each file, and after finding the storage address, the system downloads each data block concurrently, splices each data block into a complete file and returns the complete file, and fig. 2 is a working schematic diagram of an uplink storage module and a downlink storage module.
FIG. 4 shows a process of a forensic module, during forensic, a user logs in through a user login module, during user login, a right authentication module works to determine whether the user has a right to download electronic evidence, if no right, the login fails, if yes, the login succeeds, after success, the content to be forensic is selected from a page input box, the user clicks to start forensic, when the system detects a forensic request of the user, the forensic content requested by the user is verified, if the forensic content is illegal, forensic operation cannot be performed, if the content is legal and safe, a forensic function in an intelligent contract is triggered, an automatic forensic module is enabled, the original evidence is encrypted when uploaded, the system distributes a key to the user according to the specific content of the forensic request of the user, and the evidence is decrypted through the key after the user downloads, so that complete evidence can be obtained, when carrying out automatic operation of collecting evidence, can trigger the screen recording function in the intelligent contract simultaneously, the screen recording module of collecting evidence starts, records the process of whole automatic collection evidence to upload in the block chain whole record, and can return the certificate of recording the screen cochain and succeed, follow-up user can use the certificate inquiry or download the evidence, is used for the verification to whole process of collecting evidence legitimacy.
The above embodiments are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modifications made on the basis of the technical scheme according to the technical idea of the present invention fall within the protection scope of the present invention.
Claims (4)
1. An electronic access evidence obtaining system based on a block chain is characterized by comprising an evidence obtaining module, an HDFS (Hadoop distributed File System) and a Fast DFS (Fast DFS);
the evidence storage module comprises a first user login module, an identity authentication module, an evidence uploading module, an on-chain storage module and an off-chain storage module;
the first user login module is used for logging in a user to be authenticated, and if the user to be authenticated is not registered, the first user login module is used for registering and then logging in;
the identity authentication module is used for authenticating identity information of a user when the user to be stored with the certificate logs in, and issuing identity attribute to a new registered user if the current user to be stored with the certificate is the new registered user;
the evidence uploading module is used for uploading the electronic evidence to the system by the user to be certified;
the chain storage module is used for uploading the registered transaction certificate of the electronic evidence uploaded by the user with successful identity verification, including the hash abstract, the timestamp and the user digital signature of the electronic evidence, to the block chain;
the downlink storage module is used for uploading the electronic evidence with the size larger than the threshold value to the HDFS and uploading the electronic evidence with the size smaller than the threshold value to the Fast DFS according to the preset threshold value;
the evidence obtaining module comprises a second user login module, an authority authentication module, an automatic evidence obtaining module and a screen recording evidence obtaining module;
the second user login module is used for logging in the system by the user to be subjected to evidence obtaining to download the electronic evidence, and the electronic evidence is from the electronic evidence stored in the system by the user of the storage module;
the authority authentication module is used for carrying out authority authentication on a user to be authenticated who logs in the system and judging whether the user to be authenticated has downloading authority;
the automatic evidence obtaining module is used for automatically obtaining evidence according to an electronic evidence downloading request sent by the user to be proved when the authority authentication module judges that the user to be proved has the downloading authority;
the screen recording and evidence obtaining module is used for recording the whole evidence obtaining process when a user to be subjected to evidence obtaining is subjected to evidence obtaining, uploading the recording process to the block chain, storing the recording process in the block chain, and returning a certificate which is successfully linked on the screen recording, so that the validity of the whole evidence obtaining process can be verified conveniently.
2. The blockchain-based electronic evidence obtaining system of claim 1, wherein the evidence obtaining module further comprises an encryption module, a credential returning module and an address returning module;
the encryption module is used for encrypting the electronic evidence uploaded by the user to be certified;
the voucher returning module is used for returning voucher information successfully uploaded by the electronic evidence to the user to be credited after the electronic evidence is successfully uploaded to the system;
and the address returning module is used for returning the address storage information of the electronic evidence stored in the distributed file system to the user to be certified after the electronic evidence is uploaded to the HDFS or Fast DFS.
3. The block chain-based electronic access evidence obtaining system according to claim 1, wherein the evidence obtaining module further comprises an evidence verification module, the evidence verification module is configured to verify the validity and security of the evidence obtaining content requested by the user to be obtained, and if the evidence obtaining content is illegal or unsafe, the evidence obtaining operation cannot be performed, and if the evidence obtaining content is legal and safe, the evidence obtaining operation can be performed.
4. An electronic access evidence method based on the block chain based electronic access evidence system of any one of claims 1 to 3, characterized in that the method comprises an evidence method and an evidence obtaining method, wherein,
the specific process of the evidence storage method is as follows:
when the evidence is stored, a user to be subjected to evidence storage logs in the system through the first user login module, enters an evidence storage page of the system through the identity verification module, returns to an initial page for registration if the user does not log in successfully, continues logging in after the registration is successful, selects electronic evidence needing to be uploaded to the system for manual uploading or designates a website needing to be subjected to evidence collection to be automatically collected by the system; through an encryption module, a user to be stored with a certificate generates a key pair comprising a public key and a private key, wherein the private key is stored by the user, the public key is uploaded to a system by the user, and the user encrypts an electronic certificate to be uploaded through the private key, namely generates a digital signature; uploading the electronic evidence to a system by a user through an evidence uploading module; after the user uploads the electronic evidence, the system simultaneously starts an on-chain storage module and an off-chain storage module, packs the hash abstract, the current timestamp and the user digital signature of the electronic evidence into a transaction sheet, namely a transaction certificate, through the on-chain storage module, submits the transaction sheet to a consensus node in a block chain, and returns an electronic evidence uplink certificate to the user through a certificate return module; through a down-link storage module, a threshold for judging the size of the electronic evidence is preset by a system, when the electronic evidence is stored, the system calculates the size of the electronic evidence and judges the size of the electronic evidence and the preset threshold, if the size of the electronic evidence is larger than the threshold, the electronic evidence is uploaded to an HDFS (Hadoop distributed File System), if the size of the electronic evidence is smaller than the threshold, the electronic evidence is uploaded to a Fast DFS (distributed file system), and after the down-link storage is successful, a storage address of the electronic evidence is returned by an address return module; after the on-chain storage and the off-chain storage are successful, the system sends all storage addresses, timestamps and Hash digests of the electronic evidence to each node of the block chain for consensus storage;
the evidence obtaining method comprises the following specific processes:
when the user logs in, the right authentication module works to judge whether the user has the right to download the electronic evidence, if the user does not have the right, the login fails, if the user has the right, the login succeeds, and after the user succeeds, the user selects the content to be subjected to evidence collection and starts evidence collection; when a system detects a forensics request of a user, the evidence checking module is used for checking the required forensics content, if the forensics content is illegal or unsafe, forensics operation cannot be performed, if the forensics content is legal and safe, a forensics function in an intelligent contract in a block chain is triggered, an automatic forensics module is started, the system distributes a public key to the user according to the specific content of the user forensics request, and the user decrypts the electronic evidence through the public key after downloading so as to obtain complete electronic evidence; when carrying out automatic operation of collecting evidence, can trigger the record screen function in the intelligent contract in the block chain simultaneously, the module of collecting the screen is collected and is collected evidence and launch, records the whole process of collecting evidence automatically to in uploading the block chain to whole record, and can return the certificate of collecting the screen cochain success, be convenient for verify whole process of collecting evidence legitimacy.
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| CN115052010A (en) * | 2022-07-19 | 2022-09-13 | 北京微芯感知科技有限公司 | Method and system for managing electronic certificate based on distributed storage |
| CN117196621A (en) * | 2023-08-23 | 2023-12-08 | 大唐微电子技术有限公司 | Digital currency payment evidence-accessing system and method |
| CN117196621B (en) * | 2023-08-23 | 2024-10-22 | 大唐微电子技术有限公司 | Digital currency payment evidence-accessing system and method |
| CN117614739A (en) * | 2024-01-16 | 2024-02-27 | 支付宝(杭州)信息技术有限公司 | Evidence data storage method and device |
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