CN110598452B - Evidence information processing method, device, storage medium and equipment based on blockchain - Google Patents
Evidence information processing method, device, storage medium and equipment based on blockchain Download PDFInfo
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
- G06F16/22—Indexing; Data structures therefor; Storage structures
- G06F16/2228—Indexing structures
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
- G06F16/27—Replication, distribution or synchronisation of data between databases or within a distributed database system; Distributed database system architectures therefor
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
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Abstract
The application relates to a evidence information processing method, device, storage medium and equipment based on blockchain, which comprises the following steps: acquiring an information storage request initiated by request initiating equipment, wherein the information storage request carries evidence information to be stored; storing the evidence information to be stored into a first evidence storage block in a block chain; invoking a trusted timestamp service interface to obtain a trusted timestamp corresponding to the first certificate block; storing the trusted time stamp corresponding to the first certification block into a second certification block of the blockchain; transmitting the trusted time storage record of the first certificate block to the request initiating equipment for storage; the trusted time storage record of the first certificate storage block comprises a corresponding relation between the first certificate storage block and the second certificate storage block. By the method, the trusted time stamp which corresponds to the evidence information and is difficult to tamper can be obtained, and verification of the trusted time is provided.
Description
Technical Field
The present disclosure relates to the field of computer technologies, and in particular, to a method and apparatus for processing evidence information based on blockchain, a computer readable storage medium, and a computer device.
Background
Blockchains are novel application modes of computer technologies such as distributed data storage, point-to-point transmission, consensus mechanisms, encryption algorithms, and the like. The blockchain is an essentially decentralised database, and the close relation between adjacent blocks on the blockchain ensures that the data on the blockchain is difficult to tamper with and delete; once data is stored in the blockchain, the data will be permanently checked for ability, and therefore the blockchain is often used to preserve electronic evidence.
Evidence-based evidence needs to have accurate time meeting legal requirements in the judicial, so a method needs to be proposed to prove the accuracy and effectiveness of evidence-based time.
Disclosure of Invention
Based on the foregoing, it is necessary to provide a method, an apparatus, a storage medium and a device for processing evidence information based on blockchain.
A evidence information processing method based on a blockchain comprises the following steps:
acquiring an information storage request initiated by request initiating equipment, wherein the information storage request carries evidence information to be stored;
storing the evidence information to be stored into a first evidence storage block in a block chain;
invoking a trusted timestamp service interface to obtain a trusted timestamp corresponding to the first certificate block;
Storing the trusted time stamp corresponding to the first certification block into a second certification block of the blockchain;
transmitting the trusted time storage record of the first certificate block to the request initiating equipment for storage; the trusted time storage record of the first certificate storage block comprises a corresponding relation between the first certificate storage block and the second certificate storage block.
A blockchain-based evidence information processing apparatus, the apparatus comprising:
the information storage request acquisition module is used for acquiring an information storage request initiated by the request initiating equipment, wherein the information storage request carries evidence information to be stored;
the first storage module is used for storing the evidence information to be stored into a first evidence storage block in a block chain;
the trusted timestamp acquisition module is used for calling a trusted timestamp service interface to acquire a trusted timestamp corresponding to the first certificate block;
the second storage module is used for storing the trusted time stamp corresponding to the first certification block into a second certification block of the blockchain;
the sending module is used for sending the trusted time storage record of the first certificate storage block to the request initiating equipment for storage; the trusted time storage record of the first certificate storage block comprises a corresponding relation between the first certificate storage block and the second certificate storage block.
A computer-readable storage medium storing a computer program which, when executed by a processor, causes the processor to perform the steps of the blockchain-based evidence information processing method described above.
A computer device comprising a memory and a processor, the memory storing a computer program that, when executed by the processor, causes the processor to perform the steps of a blockchain-based evidence information processing method as described above.
According to the evidence information processing method, the evidence information processing device, the storage medium and the evidence information processing equipment based on the blockchain, the block characteristic values of the blocks in which the evidence information is stored are obtained through uplink of the evidence information to the blockchain, the trusted time stamp is marked for the block characteristic values through calling the trusted time stamp service, and the trusted time stamp is also stored in the blockchain; by the method, the trusted time stamp which corresponds to the evidence information and is difficult to tamper can be obtained, and verification of the trusted time is provided.
Drawings
FIG. 1 is an application environment diagram of a blockchain-based evidence information processing method in one embodiment;
FIG. 2 is a flow diagram of a method of blockchain-based evidence information processing in one embodiment;
FIG. 3 is a diagram of storing evidence information to be stored in a blockchain in an embodiment;
FIG. 4 is a flow chart of a method of blockchain-based evidence information processing in another embodiment;
FIG. 5 is a block diagram of an apparatus for blockchain-based evidence information processing in one embodiment;
FIG. 6 is a block diagram of a blockchain-based evidence information processing device in another embodiment;
FIG. 7 is a block diagram of a computer device in one embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
FIG. 1 is a diagram of an application environment for a blockchain-based evidence information processing method in one embodiment. Referring to fig. 1, the evidence information processing method based on the blockchain is applied to a evidence information processing system based on the blockchain. In some embodiments, the above-described blockchain-based evidence information processing system involves only nodes of one or more blockchains. In other embodiments, the blockchain-based evidence information processing system described above may involve one or more blockchain nodes 110 and terminals 120; the blockchain node 110 and the request initiating device 120 may be connected through a network. When receiving the information storage request sent by the request initiating device 120, the blockchain node 110 stores the evidence information to be stored carried in the information storage request into a first evidence storage block in the blockchain, marks a trusted timestamp on a block characteristic value of the generated first evidence storage block, stores the trusted timestamp into a second evidence storage block of the blockchain, and simultaneously sends the corresponding relation between the first evidence storage block and the second evidence storage block to the request initiating device 120 connected with the blockchain for storage.
Wherein the blockchain node 110 is a terminal or server responsible for maintaining blockchain network operations; the request initiating device 120 may specifically be a terminal or a server; the terminal may be a desktop terminal or a mobile terminal, and the mobile terminal may specifically be at least one of a mobile phone, a tablet computer, a notebook computer, and the like. The server may be implemented as a stand-alone server or as a server cluster composed of a plurality of servers.
Wherein, a node of a blockchain may refer to each client or server sharing data in the blockchain. Each node may receive input information while operating normally and maintain data shared in the blockchain based on the received input information. In order to ensure the information intercommunication of all nodes in the block chain, information connection can exist between every two nodes in the block chain, and the nodes can transmit information through the information connection. For example, when any node in the blockchain receives input information, other nodes in the blockchain acquire the input information according to a consensus algorithm, and store the input information as data in shared data, so that the data stored on all nodes in the same blockchain are consistent.
For each node in the same blockchain, the node identification corresponding to the node is provided, and each node in the blockchain can store the node identifications of other nodes in the blockchain so as to broadcast the generated blocks to other nodes in the data sharing system according to the node identifications of the other nodes. Each node can maintain a node identification list, and the node names and the node identifications are correspondingly stored in the node identification list. The node identifier may be an IP (Internet Protocol, protocol interconnecting between networks) address, or any other information that can be used to identify the node.
As shown in FIG. 2, in one embodiment, a blockchain-based evidence information processing method is provided. The present embodiment is mainly illustrated by the application of the method to the blockchain node 110 in fig. 1. Referring to fig. 2, the evidence information processing method based on blockchain specifically includes the following steps:
step S210, an information storage request initiated by a request initiating device is obtained, wherein the information storage request carries evidence information to be stored.
The information storage request is a request for storing information in a blockchain, and when a user needs to store information in the blockchain, the information storage request is initiated to a node of the blockchain. In embodiments of the present application, verifiable trusted times may be formed for information stored in a blockchain, typically for storage of evidence information. In this embodiment, the information to be stored in the blockchain is denoted as evidence information to be stored. In one embodiment, the evidence information to be stored may be any evidence information that is desired to be stored in the blockchain and that may be obtained as a legal-enabled trusted time record.
In one embodiment, the evidence information to be stored is evidence content itself, i.e. the user directly uploads the evidence content to the blockchain node; the hash value of the evidence content obtained after the hash operation is performed on the evidence content, namely, the hash value uploaded by the user and used for the evidence content, can also be used. In a specific embodiment, taking the evidence information that requests to be stored to the block link point as the original work as an example, the evidence information to be stored includes the content of the original work, or a hash value of the original work obtained after performing a hash operation on the content of the original work.
Step S220, storing the evidence information to be stored in a first evidence storage block in the blockchain.
According to the information storage request, the node of the blockchain stores the evidence information to be stored carried in the information storage request into the evidence storage block in the blockchain, and in this embodiment, the block in which the evidence information to be stored is recorded as the first evidence storage block. Typically, the block in which evidence information to be stored is the latest block at the current time in the blockchain.
In one embodiment, where the evidence information to be stored is evidence content itself, before storing the evidence information to be stored in the first evidence storage block in the blockchain, the method further includes: calculating a characteristic value of the evidence information to be stored; in this embodiment, storing evidence information to be stored in a first evidence-storing block in a blockchain includes: and storing the characteristic value of the evidence information to be stored into a first evidence storage block in the block chain. That is, in this embodiment, the evidence content itself is uploaded by the user, and after the blockchain node hashes the evidence content, the hash value of the obtained evidence content is stored in the first evidence block.
The feature value of the evidence information to be stored is a unique identifier of the evidence information to be stored; in one embodiment, the evidence information to be stored may be a hash value of the evidence information to be stored, and calculating the feature value of the evidence information to be stored includes: and calling a hash function to obtain a hash value of the evidence information to be stored. Wherein the hash function is a function of compressing an input message of an arbitrary length to a message digest of a certain fixed length; and inputting the message needing to be subjected to hash operation into a hash function to obtain a message digest with a fixed length. Common hash algorithms include MD4 (Message Digest4 ), MD5 (Message Digest5, message Digest 5), SHA (Secure Hash Standard, secure hash standard algorithm), and the like.
In one embodiment, the blockchain in which the evidence information to be stored is any blockchain, for example, a blockchain developed by a certain enterprise or a judicial evidence-storing chain, etc.
In one embodiment, the information storage request also carries an identity of the request initiating device; before storing the evidence information to be stored in the first evidence storage block in the blockchain, the method further comprises: performing identity verification on the equipment for sending the information storage request according to the identity; when the initiating device is requested to pass the identity authentication according to the identity authentication passing judgment, the evidence information to be stored is stored in a first evidence storage block in the block chain.
Step S230, a trusted time stamp service interface is called, and a trusted time stamp corresponding to the first certificate block is obtained.
A timestamp (timestamp) refers to a complete, verifiable data, typically a sequence of characters, that uniquely identifies a time at a moment, that can represent that a piece of data already existed before a particular time. The trusted time stamp is an electronic certificate which is issued by an authoritative trusted time stamp service center and can prove that a data telegram (electronic file) is existing, complete and verifiable at a time point and has legal efficacy, and the trusted time stamp is mainly used for tamper resistance and later repudiation of the electronic file and determining the accurate time generated by the electronic file.
In this embodiment, when the node of the blockchain stores the evidence information to be stored in the first evidence storage block of the blockchain, the node may obtain the trusted timestamp corresponding to the first evidence storage block by calling the trusted timestamp service interface.
Further, in one embodiment, the trusted timestamp corresponding to the first authenticated block includes: a trusted timestamp corresponding to the certificate block feature value of the first certificate block; after storing the evidence information to be stored in the first evidence storage block, the method further comprises the steps of: and obtaining the feature value of the certificate storage block of the first certificate storage block. In this embodiment, the authenticated block characteristic value represents a block characteristic value of the first authenticated block.
The block characteristic value is a unique identification of the block and in one embodiment may be a block hash value obtained by hashing the block.
In one embodiment, obtaining the trusted timestamp corresponding to the forensic block feature value of the first forensic block includes: and sending the certificate storage block characteristic value of the first certificate storage block to a trusted time stamp server through a trusted time stamp service interface, and acquiring a trusted time stamp corresponding to the certificate storage block characteristic value of the first certificate storage block returned by the trusted time stamp server. The block link point can be communicated with the trusted timestamp server through a trusted timestamp server interface; the trusted time stamp corresponding to the feature value of the evidence storage block returned by the trusted time server can be used for proving that the first evidence storage block is finished before the trusted time corresponding to the trusted time stamp, namely, the evidence information to be stored is already uplink at the trusted time corresponding to the trusted time stamp.
Further, in one embodiment, after receiving the trusted timestamp corresponding to the certified block feature value returned by the trusted timestamp server, the method further includes: and generating a trusted time stamp file according to the trusted time stamp corresponding to the block characteristic value of the acquired first evidence-storing block.
In one embodiment, the nodes of the blockchain may invoke the trusted timestamp service interface through a trusted timestamp server scheduler implementation. In other embodiments, invoking the trusted timestamp service interface to obtain the trusted timestamp corresponding to the first certificate block may also be implemented in other manners.
Step S240, storing the trusted time stamp corresponding to the first certification block in a second certification block of the blockchain.
After the trusted time stamp corresponding to the first certificate block is obtained, the trusted time stamp is used as information to be stored and is also stored in the block chain; in this embodiment, the block in which the trusted timestamp is stored in the blockchain is denoted as the second certification block. It can be appreciated that the first certification block and the second certification block are different blocks in the blockchain, and the first certification block is: storing information to be stored into the latest block in the block chain at the moment of the block chain, wherein the second evidence storage block is: storing the trusted time stamp corresponding to the first certification block into the latest block in the block chain at the moment of the block chain; in one embodiment, the first evidence-storing block and the second evidence-storing block may be adjacent, that is, no other block is generated in the blockchain between the time when the trusted timestamp corresponding to the first evidence-storing block is stored in the second evidence-storing block of the blockchain and the time when the evidence information to be stored is stored in the first evidence-storing block; in another embodiment, the first evidence-storing block is not adjacent to the second evidence-storing block, i.e. between the time when the trusted timestamp corresponding to the first evidence-storing block is stored in the second evidence-storing block of the blockchain and the time when the evidence information to be stored is stored in the first evidence-storing block, other blocks are also generated in the blockchain.
Taking the trusted time stamp corresponding to the first certificate storage block as an example of the trusted time stamp corresponding to the certificate storage block characteristic value of the first certificate storage block, storing the trusted time stamp corresponding to the first certificate storage block into a second certificate storage block of the block chain, and the method comprises the following steps: and storing the trusted time stamp corresponding to the certification block characteristic value of the first certification block into a second certification block of the block chain.
Step S250, a trusted time storage record of the first certificate block is sent to a request initiating device for storage; the trusted time storage record of the first certificate storage block comprises a corresponding relation between the first certificate storage block and the second certificate storage block.
After storing the trusted timestamp corresponding to the first certification block in a second certification block in the blockchain, further comprising: and generating a trusted time stamp storage record of the first certificate storage block according to the corresponding relation record of the first certificate storage block and the second certificate storage block, and sending the trusted time stamp storage record of the first certificate storage block to the request initiating equipment for storage. In one embodiment, the request initiating device may be a device of a third party operating the blockchain through which the user may check the blockchain for trusted time of information already stored in the blockchain; the request initiating device may be a terminal or a server.
According to the evidence information processing method based on the block chain, the evidence information is uploaded to the block chain to obtain the block characteristic value of the block in which the evidence information is stored, and the trusted time stamp is marked for the block characteristic value by calling the trusted time stamp service, and is also stored in the block chain; by the method, the trusted time stamp which corresponds to the evidence information and is difficult to tamper can be obtained, and verification of the trusted time is provided.
In one embodiment, invoking a trusted timestamp service interface to obtain a trusted timestamp corresponding to a first certificate block includes: and calling a trusted time stamp service interface every preset time to acquire a trusted time stamp corresponding to the first certificate storage block.
In practical applications, it may not be necessary to obtain a corresponding trusted timestamp for each newly generated block in the blockchain for storage, e.g., obtain the trusted timestamp every fixed time.
In this embodiment, a trusted time stamp service interface is invoked every predetermined time, a corresponding trusted time stamp is obtained for a first evidence storage block in a current time blockchain, in which evidence information to be stored is latest stored, the obtained trusted time stamp corresponding to the first evidence storage block is stored in a second evidence storage block of the blockchain, a trusted time stamp storage record of the first evidence storage block is generated for the first evidence storage block, and a correspondence relationship between the first evidence storage block and the second evidence storage block is carried in the trusted time stamp storage record and is sent to a request initiating device for storage. It will be appreciated that the predetermined time may be set according to the actual situation.
Fig. 3 is a schematic diagram of trusted time stamping when storing evidence information to be stored in a blockchain in the present embodiment, where the trusted time stamping corresponding to a hash value of a certificate block of a first certificate block is obtained as an example. FIG. 3 shows that after the evidence information to be stored has been stored in the first evidence storage block A1, the trusted timestamp service interface is called by the trusted timestamp service scheduler, and the evidence storage block hash value of the first evidence storage block is sent to the trusted timestamp service center to obtain the trusted timestamp T1 corresponding to the evidence storage block hash value; and storing the trusted timestamp T1 corresponding to the hash value of the received certification block into a second certification block B1. After the trusted time stamp T1 is stamped on the forensic block hash value of the first forensic block A1, and after a predetermined time interval, likewise, the trusted time stamp T2 is stamped on the forensic block hash value of the currently generated first forensic block A2, and the trusted time stamp T2 is stored in the second forensic block B2 of the blockchain.
In the method, corresponding trusted time stamps are acquired for the new first certificate storage blocks generated at the current moment at preset time intervals, and blocks without the trusted time stamps exist; if the trusted time of the evidence information uplink stored in the part of the blocks needs to be verified, the trusted time of the part of the blocks can be determined according to the first evidence storage block which stores the trusted time stamp before the block and the trusted time stamp of the first evidence storage block which stores the trusted time stamp after the block; taking the blockchain shown in fig. 3 as an example, when the trusted time of the evidence information uplink stored in the block X between A1 and A2 needs to be verified, the trusted time T1 of the evidence information uplink stored in the block X can be determined according to the trusted time stamp T1 corresponding to A1 and the trusted time stamp T2 corresponding to A2. The accuracy of the trusted time corresponding to the trusted time stamp may be different according to actual situations.
By the evidence information processing method based on the blockchain, the corresponding trusted time stamp is obtained and stored for the block generated at the current moment in the blockchain every other preset time, so that the workload of the blockchain node can be reduced to a certain extent.
After storing the evidence information to be stored in the blockchain and trusting the block in which the evidence information to be stored is stored with a trusted time stamp, the user can check the evidence information in the blockchain through a third party mechanism. In one embodiment, as shown in fig. 4, the above-mentioned evidence information processing method based on blockchain further includes steps S410 to S440.
Step S410, a verification request is acquired, wherein the verification request carries related information of evidence information to be verified.
The verification request is a request initiated by a user through a node of the third-direction blockchain and is used for verifying the authenticity of the evidence information to be verified and the trusted time of the uplink of the evidence information to be verified. When a node of the blockchain receives a verification request, analyzing the verification request to obtain related information of evidence information to be verified carried in the verification request.
In one embodiment, the related information of the evidence information to be verified can be a keyword of the evidence information to be verified, a characteristic value of the content of the evidence information to be verified, or the content of the evidence information to be verified, etc.
Step S420, when the related information of the evidence information to be verified is found in the blockchain, a verification block storing the evidence information to be verified is determined.
The node of the blockchain searches whether related information of evidence information to be verified exists in the blockchain according to the verification request; if the evidence information to be verified is already stored in the blockchain and is not tampered in the blockchain, the related information of the evidence information to be verified can be found in the blockchain. Further, when the related information of the evidence information to be verified is found in the blockchain, the finding is successful, and the block storing the evidence information to be verified is determined, and in this embodiment, the block is marked as a verification block.
It will be appreciated that when the relevant information of the evidence information to be verified is not found in the blockchain, a verification failure is indicated, and a response of the verification failure is sent to the device sending the verification request.
In step S430, when the trusted time stamp storage record corresponding to the verification block is detected in the request initiating device, the trusted time stamp corresponding to the verification block is obtained from the blockchain according to the trusted time stamp storage record of the verification block.
In the embodiment of the application, after the relevant information of the evidence information to be verified is found in the blockchain, the uplink time of the relevant information of the evidence information to be verified can be verified.
When detecting that the corresponding trusted timestamp storage record exists in the verification block storing the related information of the evidence information to be verified, acquiring the trusted timestamp corresponding to the verification block from the block chain according to the trusted timestamp storage record of the verification block, wherein the trusted timestamp storage record comprises the following steps: acquiring the corresponding relation between the verification block and the block stored by the corresponding trusted timestamp from the trusted timestamp storage record of the verification block; searching a block stored with the trusted time stamp corresponding to the verification block in the block chain according to the corresponding relation, and acquiring the trusted time stamp corresponding to the verification block from the block stored with the trusted time stamp corresponding to the verification block.
Step S440, the trusted time stamp corresponding to the verification block is returned.
In the above embodiment, after storing the evidence information to be stored in the first certificate storing block in the blockchain, storing the trusted timestamp corresponding to the first certificate storing block in the second certificate storing block, and sending the trusted timestamp storing record of the first certificate storing block to the request initiating device for storing; that is, if the related information of the evidence information to be verified is stored in the verification block, the trusted timestamp corresponding to the verification block is also stored in the blockchain, and the trusted timestamp of the verification block should be detected in the device connected to the blockchain; therefore, in this embodiment, if the trusted timestamp storage record corresponding to the verification block is detected in the request initiating device, the trusted timestamp corresponding to the verification block can be obtained by the verification block stored in the trusted timestamp storage record and the block where the trusted timestamp corresponding to the verification block is located, and the trusted timestamp is returned to the device that initiates the verification request. In one embodiment, the device that initiates the information storage request and the device that initiates the authentication request may be the same device or may be different devices.
By the evidence information processing method based on the blockchain, when a user wants to verify whether the evidence information to be verified is stored in the blockchain and verify the trusted time information of the uplink, the evidence information processing method can be realized by initiating a verification request; when a node of the blockchain receives a verification request, searching according to the related information of the evidence information to be verified carried in the verification request, and if the trusted timestamp of the evidence information to be verified is correspondingly stored when the evidence information to be verified is stored in the blockchain, returning the trusted timestamp to the request initiating equipment for a user to check, so that a way of verifying the authenticity of the evidence information to be verified and verifying the trusted time corresponding to the evidence information to be verified is provided for the user.
In another embodiment, if a new block is not generated in the blockchain, the corresponding trusted timestamp is obtained and stored, and the block where the information (evidence information to be verified) that the user may request to verify is located belongs to the block where the trusted timestamp is not stored, at this time, it is detected that there is no trusted timestamp storage record corresponding to the verified block, and in this embodiment, the method includes the following steps:
starting from the verification block, traversing the block before the verification block in the block chain until a first target block with a trusted timestamp storage record is found, and acquiring a first trusted timestamp corresponding to the first target block; starting from the verification block, traversing the blocks after the verification block in the block chain until a first second target block with a trusted timestamp storage record is found, and acquiring a second trusted timestamp corresponding to the second target block; the first trusted time stamp and the second trusted time stamp are returned.
In this embodiment, if the relevant information of the evidence to be verified is found in the blockchain, but the trusted timestamp storage record of the verification block is not found in the request initiating device, that is, the corresponding trusted timestamp is not stored when the verification block is generated, at this time, by searching the blockchain, traversing forward from the verification block, the first block (with the corresponding trusted timestamp storage record) storing the trusted timestamp before the verification block is marked as the first target block in this embodiment, traversing backward from the verification block in the blockchain, and the first block (with the trusted timestamp) storing the trusted timestamp after the verification block is marked as the second target block in this embodiment; acquiring a first trusted time stamp corresponding to the first target block according to the trusted time stamp storage record of the first target block, and acquiring a second trusted time stamp corresponding to the second target block according to the trusted time stamp storage record of the second target block; and returning the first trusted timestamp and the second trusted timestamp to the request initiating device that initiated the authentication request.
According to the evidence information processing method based on the blockchain, when the evidence information is stored, the trusted time stamp is obtained for the new first evidence storage block generated in the blockchain at intervals and is stored in the second evidence storage block, and the way of verifying the authenticity of the evidence information to be verified and the trusted time corresponding to the evidence information to be verified can be provided for the user.
In one embodiment, the above-mentioned blockchain-based information processing method further includes, after writing the information to be stored into the block of the target certification block and writing the trusted time information corresponding to the target certification block into the block header of the target certification block: obtaining the block characteristic value of the target evidence storage block, generating a characteristic value storage request according to the block characteristic value of the target evidence storage block, and sending the characteristic value storage request to a node of a second block chain so that the node of the second block chain stores the block characteristic value of the target evidence storage block into the second block chain. Further, when the characteristic value storage request sent by the node of the second blockchain is received, the block characteristic value of the second blockchain carried in the characteristic value storage request is stored in the block of the blockchain according to the characteristic value storage request.
In the above embodiment, two blockchains are bound, and the block characteristic value corresponding to the block generated in the blockchain is stored in the second blockchain; similarly, the block characteristic value received in the second blockchain is stored in the blockchain. By the method, if the information is to be tampered in the blockchain, not only the information in a series of related blocks in the blockchain but also the information in the corresponding blocks in the second blockchain need to be modified; thus, the difficulty that the information stored in the blockchain is tampered is increased, and the public trust of the information stored in the blockchain is improved.
Further, the block characteristic values of the newly generated blocks in the present blockchain may be transmitted to the nodes of the opposite blockchain at predetermined intervals.
In the information processing method based on the blockchain in the embodiment, when the verification request is received, whether the information is stored in the blockchain can be verified by searching whether the related information of the evidence information to be verified exists in the blockchain, and when the related information of the evidence information to be verified exists in the blockchain, a characteristic value searching request is initiated to a node of the second blockchain to search whether the block characteristic value of the verification block storing the related information of the evidence information to be verified exists in the second blockchain, if so, whether the related information of the evidence information to be verified is not tampered in the blockchain can be judged, and the effect of verifying the authenticity of the information stored in the blockchain can be achieved.
In a specific embodiment, taking the evidence information to be stored as a characteristic value of the evidence information as an example, when a user needs to store the evidence information a on the blockchain, an information storage request is initiated to a node of the blockchain, when the blockchain node receives the evidence information a (the evidence information to be stored), the evidence information a is subjected to hash operation to obtain a hash value of the evidence information a, and the hash value of the evidence information a is written into a evidence storage block 1 (the first evidence storage block) in the blockchain.
After the block hash value of the certificate storage block 1 is obtained, a trusted timestamp service interface is called, and the block hash value of the certificate storage block 1 is sent to a trusted time server (a server of a national time service center) to obtain a corresponding trusted timestamp; wherein the trusted timestamp may be accurate to seconds, or accurate to milliseconds; when receiving a trusted time stamp corresponding to the block hash value of the evidence storage block 1 returned by the trusted time server, storing the trusted time stamp corresponding to the block hash value of the evidence storage block 1 into an evidence storage block 2 (the second evidence storage block) of the block chain; and then generating a trusted time stamp storage record of the first certificate storage block according to the corresponding relation between the first certificate storage block and the second certificate storage block, and sending the trusted time stamp storage record of the first certificate storage block to the request initiating equipment for storage.
Because the hash value of the evidence information A and the trusted timestamp corresponding to the evidence storage block 1 stored by the hash value of the evidence information A are stored in the blockchain, when a user requests to a judicial organization to verify the authenticity of the evidence information A, the judicial organization carries out hash operation on the evidence information A through a corresponding tool to obtain the hash value, then the hash value of the evidence information A searched in the blockchain is compared, and if the hash values are consistent, the evidence information A is indicated to be stored in the blockchain; meanwhile, whether the block stored by the hash value of the evidence information A stores the corresponding trusted time stamp or not is judged by detecting whether the trusted time stamp storage record corresponding to the evidence information A exists or not, if so, the evidence storage block 2 is searched in the blockchain according to the trusted time stamp storage record, and the trusted time stamp corresponding to the evidence storage block 1 is obtained from the evidence storage block to be used for verifying the uplink time of the evidence information A.
In another embodiment, the evidence information a has no corresponding trusted time stamp storage record in the evidence block 1 stored in the blockchain, and the time of the uplink of the evidence information a is determined to be between T1 and T2 according to the trusted time stamp (T1) corresponding to the block in the blockchain where the trusted time stamp storage record exists before the evidence block 1 and the trusted time stamp (T2) corresponding to the block in the blockchain where the trusted time stamp storage record exists after the evidence block 1.
In the evidence information processing method based on the blockchain, when the hash value of the evidence information A is uplink, the trusted timestamp corresponding to the block in which the hash value of the evidence information A is stored is used as the time storage certificate and is also written into the blockchain, so that the uplink time of the evidence information A is ensured to have public trust.
FIGS. 2 and 4 are flow diagrams of a blockchain-based evidence information processing method, respectively, in one embodiment. It should be understood that, although the steps in the flowcharts of fig. 2 and 4 are shown in order as indicated by the arrows, these steps are not necessarily performed in order as indicated by the arrows. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders. Moreover, at least some of the steps in fig. 2, 4 may comprise a plurality of sub-steps or phases, which are not necessarily performed at the same time, but may be performed at different times, nor does the order of execution of the sub-steps or phases necessarily follow one another, but may be performed alternately or alternately with at least a portion of the sub-steps or phases of other steps or other steps.
A blockchain-based evidence information processing apparatus, as shown in fig. 5, comprising: an information storage request acquisition module 510, a first storage module 520, a trusted timestamp acquisition module 530, a second storage module 540, and a transmission module 550. Wherein:
the information storage request acquiring module 510 is configured to acquire an information storage request initiated by the request initiating device, where the information storage request carries evidence information to be stored.
The first storage module 520 is configured to store the evidence information to be stored in a first evidence storage block in the blockchain.
The trusted timestamp obtaining module 530 is configured to invoke a trusted timestamp service interface to obtain a trusted timestamp corresponding to the first certificate block.
The second storage module 540 is configured to store the trusted timestamp corresponding to the first certification block into a second certification block of the blockchain.
A sending module 550, configured to send the trusted time storage record of the first certificate authority to the request initiating device for storage; the trusted time storage record of the first certificate storage block comprises a corresponding relation between the first certificate storage block and the second certificate storage block.
According to the evidence information processing device based on the block chain, the evidence information is uploaded to the block chain to obtain the block characteristic value of the block in which the evidence information is stored, and the trusted time stamp is marked for the block characteristic value by calling the trusted time stamp service, and is also stored in the block chain; by the method, the trusted time stamp which corresponds to the evidence information and is difficult to tamper can be obtained, and verification of the trusted time is provided.
In one embodiment, as shown in fig. 6, the above-mentioned evidence information processing apparatus based on blockchain further includes: a validation request acquisition module 610, a validation block determination module 620, and a trusted timestamp return module 630. Wherein:
the verification request acquisition module 610 is configured to acquire a verification request, where the verification request carries related information of evidence information to be verified.
The verification block determining module 620 is configured to determine a verification block storing the evidence information to be verified when the related information of the evidence information to be verified is found in the blockchain.
And the trusted time stamp returning module 630 is configured to, when detecting that the trusted time stamp storage record corresponding to the verification block exists, obtain the trusted time stamp corresponding to the verification block from the blockchain according to the trusted time stamp storage record of the verification block, and return the trusted time stamp corresponding to the verification block.
In one embodiment, the trusted timestamp obtaining module is configured to call the trusted timestamp service interface every predetermined time to obtain a trusted timestamp corresponding to the first certificate block.
In one embodiment, the apparatus further comprises: the certificate storage block characteristic value acquisition module is used for acquiring the certificate storage block characteristic value of the first certificate storage block;
The trusted time stamp obtaining module is used for sending the feature values of the certificate storage block to the trusted time server through the trusted time stamp service interface and receiving the trusted time stamp corresponding to the feature values of the certificate storage block returned by the trusted time server;
and the second storage module is used for storing the trusted time stamp corresponding to the feature value of the certification block into a second certification block of the block chain.
In one embodiment, the apparatus further comprises: the trusted time stamp searching module is used for traversing the block before the verification block in the block chain from the verification block when the trusted time stamp storage record corresponding to the verification block does not exist, until a first target block with the trusted time stamp storage record is searched, and obtaining a first trusted time stamp corresponding to the first target block; starting from the verification block, traversing the blocks after the verification block in the block chain until a first second target block with a trusted timestamp storage record is found, and acquiring a second trusted timestamp corresponding to the second target block;
and the trusted time stamp returning module is used for returning the first trusted time stamp and the second trusted time stamp.
In one embodiment, the apparatus further comprises: the characteristic value calculation module is used for calculating the characteristic value of the evidence to be stored; and the first storage module is used for storing the characteristic value of the evidence to be stored into a first evidence storage block in the block chain.
For specific limitations on the above-described blockchain-based evidence information processing apparatus, reference may be made to the above-described limitations on the blockchain-based evidence information processing method, and the details are not repeated here.
FIG. 7 illustrates an internal block diagram of a computer device in one embodiment. The computer device may specifically be the blockchain node 110 of fig. 1. As shown in fig. 7, the computer device includes a processor, a memory, a network interface, an input device, and a display screen connected by a system bus. The memory includes a nonvolatile storage medium and an internal memory. The non-volatile storage medium of the computer device stores an operating system, and may also store a computer program that, when executed by a processor, causes the processor to implement a blockchain-based evidence information processing method. The internal memory may also have stored therein a computer program which, when executed by the processor, causes the processor to perform a blockchain-based evidence information processing method. The display screen of the computer equipment can be a liquid crystal display screen or an electronic ink display screen, the input device of the computer equipment can be a touch layer covered on the display screen, can also be keys, a track ball or a touch pad arranged on the shell of the computer equipment, and can also be an external keyboard, a touch pad or a mouse and the like.
It will be appreciated by those skilled in the art that the structure shown in fig. 7 is merely a block diagram of some of the structures associated with the present application and is not limiting of the computer device to which the present application may be applied, and that a particular computer device may include more or fewer components than shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, the blockchain-based evidence information processing apparatus provided herein may be implemented in the form of a computer program that is executable on a computer device as shown in fig. 7. The memory of the computer device may store therein various program modules constituting the blockchain-based evidence information processing apparatus, such as a request acquisition module, a first storage module, a trusted time stamp acquisition module, a second storage module, and a transmission module shown in fig. 5. The computer program constituted by the respective program modules causes the processor to execute the steps in the blockchain-based evidence information processing method of the respective embodiments of the present application described in the present specification.
For example, the computer device shown in fig. 7 may acquire the information storage request initiated by the request initiating device through a request acquisition module in the blockchain-based evidence information processing apparatus as shown in fig. 5. The computer device may store the evidence information to be stored in a first evidence-storing block in the blockchain through a first storage module. The computer equipment can call the trusted time stamp service interface through the trusted time stamp obtaining module to obtain the trusted time stamp corresponding to the first certificate block. The computer device may store the trusted time stamp corresponding to the first certification block in a second certification block of the blockchain through a second storage module. The computer device can send the trusted time storage record of the first certification block to the request initiating device for storage through the sending module.
In one embodiment, a computer device is provided that includes a memory and a processor, the memory storing a computer program that, when executed by the processor, causes the processor to perform the steps of the blockchain-based evidence information processing method described above. The steps of the blockchain-based evidence information processing method herein may be the steps in the blockchain-based evidence information processing method of the various embodiments described above.
In one embodiment, a computer readable storage medium is provided, storing a computer program which, when executed by a processor, causes the processor to perform the steps of the blockchain-based evidence information processing method described above. The steps of the blockchain-based evidence information processing method herein may be the steps in the blockchain-based evidence information processing method of the various embodiments described above.
Those skilled in the art will appreciate that all or part of the processes in the methods of the above embodiments may be implemented by a computer program for instructing relevant hardware, where the program may be stored in a non-volatile computer readable storage medium, and where the program, when executed, may include processes in the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the various embodiments provided herein may include non-volatile and/or volatile memory. The nonvolatile memory can include Read Only Memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), memory bus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), among others.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the present application. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.
Claims (10)
1. A evidence information processing method based on a blockchain comprises the following steps:
acquiring an information storage request initiated by request initiating equipment, wherein the information storage request carries evidence information to be stored;
storing the evidence information to be stored into a first evidence storage block in a block chain;
invoking a trusted timestamp service interface to obtain a trusted timestamp corresponding to the first certificate block;
Storing the trusted time stamp corresponding to the first certification block into a second certification block of the blockchain;
transmitting the trusted time storage record of the first certificate block to the request initiating equipment for storage; the trusted time storage record of the first certificate storage block comprises a corresponding relation between the first certificate storage block and the second certificate storage block;
acquiring a verification request, wherein the verification request carries related information of evidence information to be verified;
when the related information of the evidence information to be verified is found in the blockchain, determining a verification block for storing the evidence information to be verified;
when the existence of the trusted time stamp storage record corresponding to the verification block is detected in the request initiating equipment, acquiring the trusted time stamp corresponding to the verification block from the blockchain according to the trusted time stamp storage record of the verification block, and returning the trusted time stamp corresponding to the verification block;
when the trusted time stamp storage record corresponding to the verification block is not detected in the request initiating device, traversing the block before the verification block in the blockchain from the verification block until a first target block with the trusted time stamp storage record is found, acquiring a first trusted time stamp corresponding to the first target block, traversing the block after the verification block in the blockchain from the verification block until a second target block with the trusted time stamp storage record is found, acquiring a second trusted time stamp corresponding to the second target block, and returning the first trusted time stamp and the second trusted time stamp.
2. The method of claim 1, wherein invoking a trusted timestamp service interface to obtain a trusted timestamp corresponding to the first certificate block comprises:
and calling a trusted time stamp service interface every preset time to acquire a trusted time stamp corresponding to the first certificate storage block.
3. The method according to claim 1, characterized in that:
before invoking the trusted timestamp service interface to obtain the trusted timestamp corresponding to the first certificate block, the method further comprises: acquiring a certificate storing block characteristic value of the first certificate storing block;
invoking a trusted timestamp service interface to obtain a trusted timestamp corresponding to the first certificate block, including: the feature value of the certificate storage block is sent to a trusted time server through the trusted time stamp service interface, and a trusted time stamp corresponding to the feature value of the certificate storage block returned by the trusted time server is received;
storing the trusted time stamp corresponding to the first certification block into a second certification block of the blockchain: comprising the following steps: and storing the trusted time stamp corresponding to the feature value of the certification block into a second certification block of the blockchain.
4. A method according to any one of claims 1 to 3, further comprising, prior to storing the evidence information to be stored in a first evidence-storing block in a blockchain:
Calculating the characteristic value of the evidence information to be stored;
storing the evidence information to be stored into a first evidence storage block in a block chain, wherein the method comprises the following steps: and storing the characteristic value of the evidence information to be stored into a first evidence storage block in a block chain.
5. A blockchain-based evidence information processing apparatus, the apparatus comprising:
the information storage request acquisition module is used for acquiring an information storage request initiated by the request initiating equipment, wherein the information storage request carries evidence information to be stored;
the first storage module is used for storing the evidence information to be stored into a first evidence storage block in a block chain;
the trusted timestamp acquisition module is used for calling a trusted timestamp service interface to acquire a trusted timestamp corresponding to the first certificate block;
the second storage module is used for storing the trusted time stamp corresponding to the first certification block into a second certification block of the blockchain;
the sending module is used for sending the trusted time storage record of the first certificate storage block to the request initiating equipment for storage; the trusted time storage record of the first certificate storage block comprises a corresponding relation between the first certificate storage block and the second certificate storage block;
The verification request acquisition module is used for acquiring a verification request, wherein the verification request carries related information of evidence information to be verified;
the verification block acquisition module is used for determining a verification block for storing the evidence information to be verified when the related information of the evidence information to be verified is found in the blockchain;
the trusted time stamp returning module is used for acquiring the trusted time stamp corresponding to the verification block from the blockchain according to the trusted time stamp storage record of the verification block when the existence of the trusted time stamp storage record corresponding to the verification block is detected in the request initiating equipment, and returning the trusted time stamp corresponding to the verification block;
the trusted time stamp searching module is used for traversing the block before the verification block in the blockchain from the verification block until a first target block with the trusted time stamp storage record is searched, obtaining a first trusted time stamp corresponding to the first target block, traversing the block after the verification block in the blockchain from the verification block until a second target block with the trusted time stamp storage record is searched, obtaining a second trusted time stamp corresponding to the second target block, and returning the first trusted time stamp and the second trusted time stamp.
6. The apparatus of claim 5, wherein the trusted timestamp obtaining module is further configured to invoke a trusted timestamp service interface every predetermined time to obtain a trusted timestamp corresponding to the first certificate block.
7. The apparatus of claim 5, wherein the apparatus further comprises:
the certificate storage block characteristic value acquisition module is used for acquiring the certificate storage block characteristic value of the first certificate storage block;
the trusted time stamp obtaining module is further configured to send the feature value of the certificate storage block to a trusted time server through the trusted time stamp service interface, and receive a trusted time stamp corresponding to the feature value of the certificate storage block returned by the trusted time server;
the second storage module is further configured to store a trusted timestamp corresponding to the feature value of the certification block into a second certification block of the blockchain.
8. The apparatus according to any one of claims 5 to 7, further comprising: the characteristic value calculation module is used for calculating the characteristic value of the evidence information to be stored;
the first storage module is further used for storing the characteristic value of the evidence information to be stored into a first evidence storage block in the block chain.
9. A computer readable storage medium storing a computer program which, when executed by a processor, causes the processor to perform the steps of the method of any one of claims 1 to 4.
10. A computer device comprising a memory and a processor, the memory storing a computer program that, when executed by the processor, causes the processor to perform the steps of the method of any of claims 1 to 4.
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