CN110598452A - Evidence information processing method and device based on block chain, storage medium and equipment - Google Patents
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Abstract
The application relates to an evidence information processing method, an evidence information processing device, a storage medium and an evidence information processing device based on a block chain, wherein the evidence information processing device comprises: acquiring an information storage request initiated by a request initiating device, wherein the information storage request carries evidence information to be stored; storing the evidence information to be stored into a first evidence storing block in a block chain; calling a trusted timestamp service interface to obtain a trusted timestamp corresponding to the first evidence storage block; storing the trusted timestamp corresponding to the first evidence storage block into a second evidence storage block of the block chain; sending the trusted time storage record of the first evidence storage block to the request initiating device for storage; the trusted time storage record of the first evidence storage block comprises the corresponding relation between the first evidence storage block and the second evidence storage block. By the method, the credible time stamp which is corresponding to the evidence information and is difficult to be tampered can be obtained, and the verification of the credible time is provided.
Description
Technical Field
The present application relates to the field of computer technologies, and in particular, to a method and an apparatus for processing evidence information based on a block chain, a computer-readable storage medium, and a computer device.
Background
The blockchain is a novel application mode of computer technologies such as distributed data storage, point-to-point transmission, a consensus mechanism and an encryption algorithm. The blockchain is essentially a decentralized database, and the close connection between adjacent blocks on the blockchain ensures that the data on the blockchain has the characteristics of difficult tampering and deletion; once the data is stored in the blockchain, the data will acquire the ability to be permanently examined and therefore the blockchain is often used to store electronic evidence.
Evidence of evidence preservation is legally required to have accurate time meeting legal requirements, so that a method is required to prove the accuracy and effectiveness of the evidence of evidence preservation time.
Disclosure of Invention
In view of the foregoing, it is desirable to provide a method, an apparatus, a storage medium, and a device for processing evidence information based on a block chain.
An evidence information processing method based on a block chain comprises the following steps:
acquiring an information storage request initiated by a request initiating device, wherein the information storage request carries evidence information to be stored;
storing the evidence information to be stored into a first evidence storing block in a block chain;
calling a trusted timestamp service interface to obtain a trusted timestamp corresponding to the first evidence storage block;
storing the trusted timestamp corresponding to the first evidence storage block into a second evidence storage block of the block chain;
sending the trusted time storage record of the first evidence storage block to the request initiating device for storage; the trusted time storage record of the first evidence storage block comprises the corresponding relation between the first evidence storage block and the second evidence storage block.
An apparatus for processing evidence information based on a blockchain, the apparatus comprising:
the information storage request acquisition module is used for acquiring an information storage request initiated by a request initiating device, 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 storing 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 evidence storage block;
the second storage module is used for storing the trusted timestamp corresponding to the first evidence storage block into a second evidence storage block of the block chain;
the sending module is used for sending the trusted time storage record of the first evidence storage block to the request initiating device for storage; the trusted time storage record of the first evidence storage block comprises the corresponding relation between the first evidence storage block and the second evidence storage block.
A computer-readable storage medium, which stores a computer program that, when executed by a processor, causes the processor to perform the steps of the above-described blockchain-based evidence information processing method.
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 above-described blockchain-based evidence information processing method.
According to the evidence information processing method, the device, the storage medium and the equipment based on the block chain, the block characteristic value of the block in which the evidence information is stored is obtained by chaining the evidence information to the block chain, the credible timestamp service is called to mark the credible timestamp for the block characteristic value, and the credible timestamp is also stored in the block chain; by the method, the credible time stamp which is corresponding to the evidence information and is difficult to be tampered can be obtained, and the verification of the credible time is provided.
Drawings
FIG. 1 is a diagram of an application environment of a block chain-based evidence information processing method in an embodiment;
FIG. 2 is a flowchart illustrating a method for processing evidence information based on a blockchain in one embodiment;
FIG. 3 is a diagram illustrating the storage of evidence information to be stored in a blockchain in one embodiment;
FIG. 4 is a schematic flowchart of an evidence information processing method based on block chains in another embodiment;
FIG. 5 is a block diagram showing an example of an apparatus for processing evidence information based on a blockchain in one embodiment;
FIG. 6 is a block diagram showing the structure of an evidence information processing apparatus based on a block chain 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 is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
Fig. 1 is an application environment diagram of an evidence information processing method based on a blockchain in an embodiment. Referring to fig. 1, the evidence information processing method based on the block chain is applied to an evidence information processing system based on the block chain. In some embodiments, the above-described blockchain-based evidence information processing system involves only one or more blockchain nodes. In other embodiments, the above-described blockchain-based evidence information processing system may involve one or more blockchain nodes 110 and terminals 120; blockchain node 110 and request originating device 120 may be connected over a network. When receiving an information storage request sent by the request initiating device 120, the block chain node 110 stores the carried evidence information to be stored in a first evidence storing block in the block chain, stamps a trusted timestamp on a generated block characteristic value of the first evidence storing block, stores the trusted timestamp in a second evidence storing block of the block chain, and sends a corresponding relationship between the first evidence storing block and the second evidence storing block to the request initiating device 120 connected with the block chain for storage.
The block link point 110 is a terminal or a server responsible for maintaining the operation of the block link network; 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 consisting of a plurality of servers.
The nodes of the blockchain may refer to respective clients or servers sharing data in the blockchain. Each node may receive input information during normal operation and maintain data shared in the blockchain based on the received input information. In order to ensure the information intercommunication of each node in the block chain, information connection can exist between each node in the block chain, and the nodes can transmit information through the information connection. For example, when any node in a 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.
Each node in the same block chain has a corresponding node identifier, and each node in the block chain can store the node identifiers of other nodes in the block chain, so that the generated block can be broadcast to other nodes in the data sharing system according to the node identifiers of other nodes. Each node can maintain a node identification list, and the node name and the node identification are correspondingly stored in the node identification list. The node identifier may be an IP (internet protocol) address and any other information that can be used to identify the node.
As shown in fig. 2, in one embodiment, a block chain-based evidence information processing method is provided. This embodiment is mainly illustrated by applying this method to the block link point 110 in fig. 1. Referring to fig. 2, the evidence information processing method based on the block chain specifically includes the following steps:
step S210, an information storage request initiated by the request initiating device is obtained, where the information storage request carries evidence information to be stored.
The information storage request is a request for storing information in the block chain, and when a user needs to store the information in the block chain, the information storage request is initiated to a node of the block chain. In embodiments of the present application, a verifiable trusted time may be formed for information stored in a block chain, typically for storage of evidence information. In this embodiment, the information to be stored in the block chain is recorded as the 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 for which a legally valid trusted time record may be obtained.
In one embodiment, the evidence information to be stored is the evidence content itself, that is, the user directly uploads the evidence content to the block chain node; or the hash value of the evidence content obtained after the hash operation is performed on the evidence content, that is, the hash value uploaded by the user is the evidence content. In a specific embodiment, taking the evidence information that initiates a request to store to a block link point as an example of a creative work, the evidence information to be stored includes content of the creative work, or a hash value of the creative work obtained after performing a hash operation on the content of the creative work.
Step S220, store the evidence information to be stored in the first evidence storing block in the block chain.
According to the information storage request, the nodes of the block chain store the evidence information to be stored carried in the information storage request into the evidence storing block in the block chain. Generally, the block into which the evidence information to be stored is the latest block in the block chain at the current time.
In an embodiment where the evidence information to be stored is the evidence content itself, before storing the evidence information to be stored in the first evidence storing block in the block chain, the method further includes: calculating a characteristic value of the evidence information to be stored; in this embodiment, storing the evidence information to be stored in the first evidence storing block in the block chain includes: and storing the characteristic value of the evidence information to be stored into a first evidence storing block in the block chain. That is, in this embodiment, the user uploads the evidence content itself, and after the block link point performs the hash operation on the evidence content, the obtained hash value of the evidence content is stored in the first evidence storing block.
The characteristic value of the evidence information to be stored is a unique identifier of the evidence information to be stored; in one embodiment, the to-be-stored evidence information may be a hash value of the to-be-stored evidence information, and calculating the feature value of the to-be-stored evidence information includes: and calling a hash function to obtain a hash value of the evidence information to be stored. The hash function is a function for compressing an input message with any length to a message digest with a certain fixed length; the message to be hashed is input into the hash function, so that a message abstract with a fixed length can be obtained. Common Hash algorithms include MD4(Message Digest4, Message Digest 354), MD5(Message Digest 5), SHA (Secure Hash Standard), 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 an enterprise or a forensic chain.
In one embodiment, the information storage request also carries an identity of the request initiating device; before storing the evidence information to be stored into the first evidence storing block in the block chain, the method further comprises the following steps: performing identity authentication on equipment sending the information storage request according to the identity; and when the identity authentication is judged to be passed according to the identity identification, the request initiating device is passed through the identity authentication, storing the evidence information to be stored into a first evidence storing block in the block chain.
Step S230, a trusted timestamp service interface is called to obtain a trusted timestamp corresponding to the first evidence storage block.
A timestamp (timestamp) refers to a complete, verifiable piece of data, usually a sequence of characters, that can indicate that a piece of data existed before a particular time, and uniquely identifies the time of the moment. The trusted timestamp is an electronic certificate which is issued by an authoritative trusted timestamp service center, can prove that a data message (electronic file) is existed, complete and verifiable at a time point and has legal effectiveness, and is mainly used for preventing the electronic file from being tampered and repudiated afterwards and determining the accurate time generated by the electronic file.
In this embodiment, when storing the to-be-stored evidence information into the first evidence storing block of the block chain, the node of the block chain may obtain the trusted timestamp corresponding to the first evidence storing block by calling the trusted timestamp service interface.
Further, in one embodiment, the trusted timestamp corresponding to the first credentialing block comprises: a trusted timestamp corresponding to a certificate storage block characteristic value of the first certificate storage block; after storing the evidence information to be stored in the first evidence storing block, the method further comprises the following steps: and acquiring the characteristic value of the certificate storage block of the first certificate storage block. In this embodiment, the evidence storing block feature value represents a block feature value of the first evidence storing block.
The block characteristic value is a unique identifier of the block, and in one embodiment, the block characteristic value may be a block hash value obtained after hashing the block.
In one embodiment, obtaining the trusted timestamp corresponding to the syndrome value of the first evidence storage block includes: and sending the certificate storage block characteristic value of the first certificate storage block to a trusted timestamp server through a trusted timestamp service interface, and acquiring a trusted timestamp corresponding to the certificate storage block characteristic value of the first certificate storage block returned by the trusted timestamp server. The block link point can communicate with the credible timestamp server through a credible timestamp server interface; the trusted time stamp corresponding to the evidence storage block characteristic value returned by the trusted time server can be used for proving that the first evidence storage block is completed before the trusted time corresponding to the trusted time stamp, that is, the evidence information to be stored is linked up at the trusted time corresponding to the trusted time stamp.
Further, in an embodiment, after receiving the trusted timestamp corresponding to the credit block characteristic 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 acquired block characteristic value of the first evidence storing block.
In one embodiment, the nodes of the blockchain may implement calls to the trusted timestamp service interface through a trusted timestamp server scheduler. In other embodiments, the trusted timestamp service interface is called, and the trusted timestamp corresponding to the first authentication block is obtained in other manners.
Step S240, the trusted timestamp corresponding to the first evidence storage block is stored in the second evidence storage block of the block chain.
After the trusted timestamp corresponding to the first evidence storage block is obtained, the trusted timestamp is used as information to be stored and is also stored in the block chain; in this embodiment, the block storing the trusted timestamp in the block chain is referred to as a second evidence storing block. It can be understood that the first evidence storing block and the second evidence storing block are different blocks in the block chain, and the first evidence storing block is: the latest block in the block chain at the moment when the information to be stored is stored in the block chain, and the second evidence storage block is: storing the trusted timestamp corresponding to the first evidence storing block into the latest block in the block chain at the moment of the block chain; in one embodiment, the first evidence storage block and the second evidence storage block may be adjacent, that is, between the time when the trusted timestamp corresponding to the first evidence storage block is stored in the second evidence storage block of the block chain and the time when the evidence information to be stored is stored in the first evidence storage block, no other block is generated in the block chain; in another embodiment, the first evidence storing block and the second evidence storing block are not adjacent, that is, other blocks are generated in the block chain between the time when the trusted timestamp corresponding to the first evidence storing block is stored in the second evidence storing block of the block chain and the time when the evidence information to be stored is stored in the first evidence storing block.
Taking the trusted timestamp corresponding to the first evidence storage block as the trusted timestamp corresponding to the evidence storage block characteristic value of the first evidence storage block as an example, the trusted timestamp corresponding to the first evidence storage block is stored in the second evidence storage block of the block chain, and the method comprises the following steps: and storing the trusted timestamp corresponding to the certificate storage block characteristic value of the first certificate storage block into a second certificate storage block of the block chain.
Step S250, the trusted time storage record of the first evidence storage block is sent to the request initiating device for storage; the trusted time storage record of the first evidence storage block comprises the corresponding relation between the first evidence storage block and the second evidence storage block.
After storing the trusted timestamp corresponding to the first credentialing block into a second credentialing block in the block chain, the method further comprises the following steps: and generating a trusted timestamp storage record of the first evidence storage block according to the corresponding relation record of the first evidence storage block and the second evidence storage block, and sending the trusted timestamp storage record of the first evidence storage block to the request initiating device for storage. In one embodiment, the request initiating device may be a device of a third party of the operating blockchain, through which the user can check the trusted time of the 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 linked to the block chain to obtain the block characteristic value of the block in which the evidence information is stored, the credible timestamp service is called to mark the block characteristic value with the credible timestamp, and the credible timestamp is also stored in the block chain; by the method, the credible time stamp which is corresponding to the evidence information and is difficult to be tampered can be obtained, and the verification of the credible time is provided.
In one embodiment, invoking the trusted timestamp service interface to obtain the trusted timestamp corresponding to the first evidence storage block includes: and calling the trusted timestamp service interface every other preset time to acquire the trusted timestamp corresponding to the first evidence storage block.
In practical applications, it may not be necessary to obtain a corresponding trusted timestamp for each newly generated block in the block chain for storage, for example, the trusted timestamp is obtained every fixed time.
In this embodiment, every predetermined time, a trusted timestamp service interface is called, a corresponding trusted timestamp is acquired for a first evidence storage block which is newly stored with evidence information to be stored in a block chain at the current moment, the obtained trusted timestamp corresponding to the first evidence storage block is stored in a second evidence storage block of the block chain, a trusted timestamp storage record of the first evidence storage block is generated for the first evidence storage block, and a corresponding relation between the first evidence storage block and the second evidence storage block is carried in the trusted timestamp storage record and sent to the request initiating device for storage. It is to be understood that the predetermined time may be set according to actual conditions.
As shown in fig. 3, a schematic diagram of stamping a trusted timestamp when storing to-be-stored evidence information in a block chain in the present embodiment is shown, and this embodiment takes obtaining the trusted timestamp corresponding to the hash value of the evidence storing block of the first evidence storing block as an example. Fig. 3 shows that after the evidence information to be stored has been stored in the first evidence storing block a1, the trusted timestamp service interface is called by the trusted timestamp service scheduler to send the hash value of the evidence storing block of the first evidence storing block to the trusted timestamp service center to obtain the trusted timestamp T1 corresponding to the hash value of the evidence storing block; and storing the trusted timestamp T1 corresponding to the hash value of the storage block into a second storage block B1. After a predetermined time interval after the trusted timestamp T1 is stamped on the credential block hash value of the first credential block a1, the trusted timestamp T2 is similarly stamped on the currently generated credential block hash value of the first credential block a2, and the trusted timestamp T2 is stored in the second credential block B2 of the block chain.
In the method, a corresponding trusted timestamp is acquired for a new first evidence storage block generated at the current moment every preset time, and blocks without the trusted timestamps exist; if the trusted time of the chain of the evidence information stored in the part of the block needs to be verified, the trusted time can be determined according to the trusted time stamp of the first evidence storing block, in which the trusted time stamp is stored, in the previous block and the trusted time stamp of the first evidence storing block, in the next block, in which the trusted time stamp is stored; taking the block chain shown in fig. 3 as an example, when it is required to verify the trusted time of the chain of evidence information stored in the block X between a1 and a2, then the trusted time T1-T2 of the chain of evidence information stored in the block X can be determined according to the trusted timestamp T1 corresponding to a1 and the trusted timestamp T2 corresponding to a 2. The accuracy of the trusted time corresponding to the trusted timestamp may be different according to different actual situations.
By the evidence information processing method based on the block chain, the credible time stamp corresponding to the block acquisition generated at the current moment in the block chain is stored at intervals of a preset period of time, so that the workload of the block chain node can be reduced to a certain extent.
After storing the evidence information to be stored in the block chain and marking a trusted timestamp on the block stored by the evidence information to be stored, the user can check the evidence information in the block chain through a third-party mechanism. In one embodiment, as shown in fig. 4, the above-mentioned evidence information processing method based on a block chain further includes steps S410 to S440.
Step S410, a verification request is obtained, and the verification request carries relevant information of the evidence information to be verified.
The verification request is a request initiated by a user through a node of the third direction block chain and is used for verifying the authenticity of the evidence information to be verified and the credible time of the chain on the evidence information to be verified. When the node of the block chain receives the verification request, the verification request is analyzed to obtain the relevant information of the evidence information to be verified carried in the verification request.
In one embodiment, the related information of the evidence information to be verified may be a keyword of the evidence information to be verified, a feature value of the content of the evidence information to be verified, or the information content of the evidence information to be verified, and the like.
In step S420, when the relevant information of the to-be-verified evidence information is found in the block chain, the verification block storing the to-be-verified evidence information is determined.
Searching whether relevant information of the evidence information to be verified exists in the block chain or not by the node of the block chain according to the verification request; if the evidence information to be verified has been previously stored in the blockchain and has not been tampered in the blockchain, the information related to the evidence information to be verified should be found in the blockchain. Further, when the related information of the to-be-verified evidence information is found in the block chain, it indicates that the finding is successful, and determines the block storing the to-be-verified evidence information, and in this embodiment, the block is marked as a verification block.
It can be understood that when the information related to the evidence information to be verified is not found in the blockchain, the verification is failed, and at this time, a response of the verification failure is sent to the device sending the verification request.
Step S430, when the request initiating device detects that there is a trusted timestamp storage record corresponding to the verification block, the trusted timestamp storage record corresponding to the verification block is obtained from the block chain according to the trusted timestamp storage record of the verification block.
In the embodiment of the application, after the information related to the to-be-verified evidence information is found in the block chain, the uplink time of the information related to the to-be-verified evidence information can be verified.
When detecting that a corresponding trusted timestamp storage record exists in a verification block storing related information of evidence information to be verified, obtaining a trusted timestamp corresponding to the verification block from a block chain according to the trusted timestamp storage record of the verification block, including: 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; and 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 returns the trusted timestamp corresponding to the verification block.
In the embodiment, after storing the evidence information to be stored in the first evidence storing block in the block chain, the trusted timestamp corresponding to the first evidence storing block is stored in the second evidence storing block, and the trusted timestamp storage record of the first evidence storing block is sent to the request initiating device for storage; that is, if the information related to 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 block chain, and a storage record of the trusted timestamp of the verification block should be detected in the device connected to the block chain; 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 through the block where the verification block stored in the trusted timestamp storage record and the corresponding trusted timestamp are located, and the trusted timestamp is returned to the device that initiated the verification request. In one embodiment, the device that initiates the information storage request and the device that initiates the authentication request may or may not be the same device.
By the block chain-based evidence information processing method, when a user wants to verify whether the evidence information to be verified is stored in the block chain and verify the credible time information of the uplink, the verification can be realized by initiating a verification request; when a verification request is received by a node of a block chain, searching is carried out according to related information of evidence information to be verified carried in the verification request, if a credible timestamp of the evidence information to be verified is correspondingly stored when the evidence information to be verified is stored in the block chain, the credible timestamp is returned to request initiating equipment for a user to check, and a path for verifying the authenticity of the evidence information to be verified and verifying the credible timestamp 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 block chain, the block chain acquires a corresponding trusted timestamp for storage, and it may be that a block in which information (evidence information to be verified) requested to be verified by a user belongs to a block for which a trusted timestamp is not stamped for storage, and at this time, it is detected that there is no trusted timestamp storage record corresponding to the verified block, in this embodiment, the method includes the following steps:
traversing blocks before the verification block in the block chain from the verification block 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; traversing blocks behind the verification block in the block chain from the verification block until a second target block with a trusted timestamp storage record is found, and acquiring a second trusted timestamp corresponding to the second target block; and returning the first trusted timestamp and the second trusted timestamp.
In this embodiment, if the information related to the evidence to be verified is found in the block chain, but the trusted timestamp storage record of the verification block is not found in the request initiating device, that is, the verification block is not generated and the corresponding trusted timestamp is not stored, at this time, a block which is a first block before the verification block and stores the trusted timestamp (where the corresponding trusted timestamp storage record exists) is traversed forward by searching the block chain from the verification block, and the first block after the verification block and which stores the trusted timestamp is traversed backward from the verification block is marked as a first target block in this embodiment; acquiring a first credible timestamp corresponding to the first target block according to the credible timestamp storage record of the first target block, and acquiring a second credible timestamp corresponding to the second target block according to the credible timestamp 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 block chain, when the evidence information is stored, the credible time stamp is acquired for the new first evidence storage block generated in the block chain at intervals and stored in the second evidence storage block, and the authenticity verification of the evidence information to be verified and the credible time verification way corresponding to the evidence information to be verified can be provided for the user.
In one embodiment, after writing the information to be stored into the block of the target evidence storage block and writing the trusted time information corresponding to the target evidence storage block into the block header of the target evidence storage block, the above information processing method based on the block chain further includes: and acquiring a 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 a characteristic value storage request sent by the node of the second block chain is received, the block characteristic value of the second block chain carried in the characteristic value storage request is stored in the block of the block chain according to the characteristic value storage request.
In the above embodiment, by binding the two block chains, the block characteristic value corresponding to the block generated in the block chain is stored in the second block chain; similarly, the block eigenvalue in the second block chain is received and stored in the block chain. By the method, if the information is to be tampered in the block chain, not only the information in a series of related blocks in the block chain needs to be modified, but also the information in a corresponding block in a second block chain needs to be modified; therefore, the difficulty of tampering the information stored in the block chain is increased, and the credibility of the information stored in the block chain is improved.
Further, the block eigenvalue of a newly generated block in the local block chain may be sent a eigenvalue storage request to the node of the opposite block chain at every predetermined time.
In the block chain-based information processing method in the above embodiment, when the verification request is received, it may be verified whether the information is uplink-stored by searching whether there is related information of the evidence information to be verified in the block chain, and when there is related information of the evidence information to be verified in the block chain, a characteristic value search request may be initiated to a node of the second block chain to search whether there is storage of the block characteristic value of the verification block storing the related information of the evidence information to be verified in the second block chain, and if there is storage of the block characteristic value of the verification block storing the related information of the evidence information to be verified in the second block chain, it may be determined that the related information of the evidence information to be verified is not tampered in the block chain, so as to achieve an effect of verifying the authenticity of the information stored in the block chain.
In an embodiment, taking to-be-stored evidence information as a characteristic value of the evidence information as an example, when a user needs to store the evidence information a on a blockchain, an information storage request is initiated to a node of the blockchain, when the blockchain node receives the evidence information a (the to-be-stored evidence information), the blockchain node performs hash operation on the evidence information a 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 evidence storage block 1 is obtained, calling a trusted timestamp service interface, and sending the block hash value of the evidence storage block 1 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 a trusted timestamp corresponding to the block hash value of the evidence storing block 1 returned by the trusted time server is received, storing the trusted timestamp corresponding to the block hash value of the evidence storing block 1 into an evidence storing block 2 (the second evidence storing block) of the block chain; and then generating a trusted timestamp storage record of the first evidence storage block according to the corresponding relation between the first evidence storage block and the second evidence storage block, and sending the trusted timestamp storage record of the first evidence storage block to the request initiating device for storage.
Since the hash value of the evidence information A and the trusted timestamp corresponding to the evidence storing block 1 stored in the hash value of the evidence information A are stored in the block chain, when a user requests the judicial organization to verify the authenticity of the evidence information A, the judicial organization performs hash operation on the evidence information A through a corresponding tool to obtain the hash value, then compares the hash values of the evidence information A searched in the block chain, and if the comparison is consistent, indicates that the evidence information A is stored in the block chain; meanwhile, whether a trusted timestamp storage record corresponding to the evidence information A exists or not is detected, so that whether a corresponding trusted timestamp is stored in a block chain of a block stored by the Hash value of the evidence information A or not is judged, if yes, a evidence storage block 2 is found in the block chain according to the trusted timestamp storage record, and a trusted timestamp corresponding to the evidence storage block 1 is obtained from the evidence storage block 2 and used for verifying the uplink time of the evidence information A.
In another embodiment, evidence information a stored in evidence block 1 of the block chain has no corresponding trusted timestamp record, and the time of the chain of evidence information a is determined to be between T1 and T2 according to the trusted timestamp (T1) of the block in which the trusted timestamp record existed before evidence block 1 and the trusted timestamp (T2) of the block in which the trusted timestamp record existed after evidence block 1.
In the evidence information processing method based on the block chain, when the hash value of the evidence information A is uplink, the credible timestamp corresponding to the block in which the hash value of the evidence information A is stored is used as the time evidence, and is also written into the block chain, so that the uplink time of the evidence information A has public credibility.
Fig. 2 and 4 are respectively schematic flow diagrams of an evidence information processing method based on a block chain in an embodiment. It should be understood that although the steps in the flowcharts of fig. 2 and 4 are shown in sequence as indicated by the arrows, the steps are not necessarily performed in sequence as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 2 and 4 may include multiple sub-steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of performing the sub-steps or stages is not necessarily sequential, but may be performed alternately or alternately with other steps or at least some of the sub-steps or stages of other steps.
An apparatus for processing evidence information based on block chains, as shown in fig. 5, the apparatus 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 sending module 550. Wherein:
an information storage request obtaining module 510, configured to obtain an information storage request initiated by a 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 into a first evidence storing block in the block chain.
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 storage block.
The second storing module 540 is configured to store the trusted timestamp corresponding to the first evidence storing block into a second evidence storing block of the block chain.
A sending module 550, configured to send the trusted time storage record of the first evidence storing block to the request initiating device for storage; the trusted time storage record of the first evidence storage block comprises the corresponding relation between the first evidence storage block and the second evidence storage block.
The evidence information processing device based on the block chain obtains the block characteristic value of the block in which the evidence information is stored by chaining the evidence information to the block chain, and marks a credible timestamp for the block characteristic value by calling a credible timestamp service, and stores the credible timestamp into the block chain; by the method, the credible time stamp which is corresponding to the evidence information and is difficult to be tampered can be obtained, and the verification of the credible time is provided.
In one embodiment, as shown in fig. 6, the above evidence information processing apparatus based on block chains further includes: an authentication request acquisition module 610, an authentication block determination module 620, and a trusted timestamp return module 630. Wherein:
the verification request obtaining module 610 is configured to obtain a verification request, where the verification request carries information related to the evidence information to be verified.
The verification block determining module 620 is configured to determine a verification block storing the to-be-verified evidence information when the relevant information of the to-be-verified evidence information is found in the block chain.
And a trusted timestamp returning module 630, configured to, when it is detected that there is a trusted timestamp storage record corresponding to the verification block, obtain, according to the trusted timestamp storage record of the verification block, a trusted timestamp corresponding to the verification block from the block chain, and return the trusted timestamp corresponding to the verification block.
In an 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 storage block.
In one embodiment, the above apparatus further comprises: the evidence storage block characteristic value acquisition module is used for acquiring the evidence storage block characteristic value of the first evidence storage block;
the trusted timestamp acquisition module is used for sending the evidence storage block characteristic value to the trusted time server through the trusted timestamp service interface and receiving a trusted timestamp corresponding to the evidence storage block characteristic value returned by the trusted time server;
and the second storage module is used for storing the trusted timestamp corresponding to the characteristic value of the evidence storage block into a second evidence storage block of the block chain.
In one embodiment, the above apparatus further comprises: the trusted timestamp searching module is used for traversing blocks before the verification block in the block chain from the verification block when detecting that the trusted timestamp storage record corresponding to the verification block does not exist, until a first target block with the trusted timestamp storage record is searched, and acquiring a first trusted timestamp corresponding to the first target block; traversing blocks behind the verification block in the block chain from the verification block until a 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 timestamp returning module is used for returning the first trusted timestamp and the second trusted timestamp.
In one embodiment, the above apparatus further comprises: the characteristic value calculation module is used for calculating the characteristic value of the evidence to be stored; the first storage module is used for storing the characteristic value of the evidence to be stored into a first evidence storing block in the block chain.
For the specific definition of the evidence information processing device based on the block chain, reference may be made to the above definition of the evidence information processing method based on the block chain, and details are not repeated here.
FIG. 7 is a diagram illustrating an internal structure of a computer device in one embodiment. The computer device may specifically be block link point 110 in fig. 1. As shown in fig. 7, the computer apparatus includes a processor, a memory, a network interface, an input device, and a display screen connected through a system bus. Wherein the memory includes a non-volatile 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 the processor, causes the processor to implement the evidence information processing method based on the blockchain. The internal memory may also have a computer program stored therein, which when executed by the processor, causes the processor to perform a method for evidence information processing based on a blockchain. The display screen of the computer equipment can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer equipment can be a touch layer covered on the display screen, a key, a track ball or a touch pad arranged on the shell of the computer equipment, an external keyboard, a touch pad or a mouse and the like.
Those skilled in the art will appreciate that the architecture shown in fig. 7 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, the evidence information processing apparatus based on block chain provided in the present application may be implemented in the form of a computer program, and the computer program may be run on a computer device as shown in fig. 7. The memory of the computer device may store various program modules constituting the evidence information processing apparatus based on the block chain, 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 block chain 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 obtain the information storage request initiated by the request initiating device through a request obtaining module in the evidence information processing apparatus based on the block chain as shown in fig. 5. The computer equipment can store the evidence information to be stored into a first evidence storing block in the block chain through the first storage module. The computer equipment can call the trusted timestamp service interface through the trusted timestamp acquisition module to acquire the trusted timestamp corresponding to the first evidence storage block. The computer device can store the trusted timestamp corresponding to the first evidence storage block into a second evidence storage block of the block chain through the second storage module. The computer device can send the trusted time storage record of the first evidence storage block to the request initiating device through the sending module for storage.
In one embodiment, a computer device is provided, which includes a memory and a processor, the memory stores a computer program, and the computer program, when executed by the processor, causes the processor to execute the steps of the evidence information processing method based on block chain. Here, the steps of the evidence information processing method based on the block chain may be steps in the evidence information processing method based on the block chain in the above embodiments.
In one embodiment, a computer-readable storage medium is provided, which stores a computer program, and when the computer program is executed by a processor, the computer program causes the processor to execute the steps of the above-mentioned evidence information processing method based on block chains. Here, the steps of the evidence information processing method based on the block chain may be steps in the evidence information processing method based on the block chain in the above embodiments.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a non-volatile computer-readable storage medium, and can include the processes of the embodiments of the methods described above when the program is executed. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile 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), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. An evidence information processing method based on a block chain comprises the following steps:
acquiring an information storage request initiated by a request initiating device, wherein the information storage request carries evidence information to be stored;
storing the evidence information to be stored into a first evidence storing block in a block chain;
calling a trusted timestamp service interface to obtain a trusted timestamp corresponding to the first evidence storage block;
storing the trusted timestamp corresponding to the first evidence storage block into a second evidence storage block of the block chain;
sending the trusted time storage record of the first evidence storage block to the request initiating device for storage; the trusted time storage record of the first evidence storage block comprises the corresponding relation between the first evidence storage block and the second evidence storage block.
2. The method of claim 1, wherein invoking a trusted timestamp service interface to obtain a trusted timestamp corresponding to the first credential block comprises:
and calling a trusted timestamp service interface every other preset time to obtain a trusted timestamp corresponding to the first evidence storage block.
3. The method of claim 1, wherein:
before calling a trusted timestamp service interface and acquiring a trusted timestamp corresponding to the first evidence storage block, the method further includes: obtaining the characteristic value of the certificate storing block of the first certificate storing block;
calling a trusted timestamp service interface to obtain a trusted timestamp corresponding to the first evidence storage block, including: sending the evidence storage block characteristic value to a trusted time server through the trusted time stamp service interface, and receiving a trusted time stamp corresponding to the evidence storage block characteristic value returned by the trusted time server;
storing the trusted timestamp corresponding to the first evidence storage block into a second evidence storage block of the block chain: the method comprises the following steps: and storing the credible time stamp corresponding to the characteristic value of the evidence storage block into a second evidence storage block of the block chain.
4. The method of claim 1, further comprising:
acquiring a verification request, wherein the verification request carries relevant information of evidence information to be verified;
when the related information of the evidence information to be verified is found in the block chain, determining a verification block for storing the evidence information to be verified;
when the request initiating device detects that a trusted timestamp storage record corresponding to the verification block exists, acquiring a trusted timestamp corresponding to the verification block from the block chain according to the trusted timestamp storage record of the verification block;
returning a trusted timestamp corresponding to the verification block.
5. The method of claim 4, when a trusted timestamp storage record corresponding to the verification block is not detected in the request initiating device, comprising:
traversing blocks before the verification block in the block chain from the verification block 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;
traversing blocks behind the verification block in the block chain from the verification block until a second target block with a trusted timestamp storage record is found, and acquiring a second trusted timestamp corresponding to the second target block;
returning the first trusted timestamp and the second trusted timestamp.
6. The method according to any one of claims 1 to 5, wherein before storing the evidence information to be stored in the first evidence storing block in the block chain, the method further comprises:
calculating a characteristic value of the evidence information to be stored;
storing the evidence information to be stored into a first evidence storing block in a block chain, comprising: and storing the characteristic value of the evidence information to be stored into a first evidence storing block in a block chain.
7. An apparatus for processing evidence information based on a blockchain, the apparatus comprising:
the information storage request acquisition module is used for acquiring an information storage request initiated by a request initiating device, 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 storing 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 evidence storage block;
the second storage module is used for storing the trusted timestamp corresponding to the first evidence storage block into a second evidence storage block of the block chain;
the sending module is used for sending the trusted time storage record of the first evidence storage block to the request initiating device for storage; the trusted time storage record of the first evidence storage block comprises the corresponding relation between the first evidence storage block and the second evidence storage block.
8. The apparatus of claim 7, further comprising:
the verification request acquisition module is used for acquiring a verification request, and the verification request carries relevant information of evidence information to be verified;
a verification block acquisition module, configured to acquire a verification block storing the to-be-verified evidence information when the relevant information of the to-be-verified evidence information is found in the block chain;
and the trusted timestamp returning module is used for acquiring the trusted timestamp corresponding to the verification block from the block chain according to the trusted timestamp storage record of the verification block when the trusted timestamp storage record corresponding to the verification block is detected to exist, and returning the trusted timestamp corresponding to the verification block.
9. A computer-readable storage medium, storing a computer program which, when executed by a processor, causes the processor to carry out the steps of the method according to any one of claims 1 to 6.
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 according to any one of claims 1 to 6.
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