CN111447068A - Time service evidence storing method based on block chain - Google Patents

Time service evidence storing method based on block chain Download PDF

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Publication number
CN111447068A
CN111447068A CN202010200801.8A CN202010200801A CN111447068A CN 111447068 A CN111447068 A CN 111447068A CN 202010200801 A CN202010200801 A CN 202010200801A CN 111447068 A CN111447068 A CN 111447068A
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block
service
time
time service
data block
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CN111447068B (en
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蓝虎
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Tencent Technology Shenzhen Co Ltd
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Tencent Technology Shenzhen Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/32—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
    • H04L9/3247—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials involving digital signatures
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/60—Protecting data
    • G06F21/64—Protecting data integrity, e.g. using checksums, certificates or signatures
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/10—Protocols in which an application is distributed across nodes in the network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/32—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
    • H04L9/3297—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials involving time stamps, e.g. generation of time stamps

Abstract

The embodiment of the application discloses a time service evidence storage method based on a block chain, which comprises the following steps: and the block link point receives the first time service signature information sent by the time service center platform, verifies the first time service signature information, generates a second business data block according to the first time service signature information and a plurality of to-be-time-service data sent by a plurality of second time service application parties received in a second time interval if the verification is passed, adds the second business data block to the block chain network, and sends the time service information to each first time service application party in the plurality of first time service application parties. By the method and the device, the equipment pressure of the time service center platform can be reduced, and the safety of the time service signature information is improved.

Description

Time service evidence storing method based on block chain
Technical Field
The application relates to the technical field of computers, in particular to a time service evidence storing method based on a block chain.
Background
At present, a time service and evidence storage method mainly comprises the steps that a time service applicant sends data to be time service to a national time service center, the national time service center generates a time stamp according to the time of receiving the data to be time service sent by the time service applicant, the time stamp and the data to be time service are signed, time service signature information of the data to be time service is obtained, the time service signature information is returned to the time service applicant, and the time service applicant stores the time service signature information. The method has the problems of overlarge pressure of a national time service center and overhigh maintenance equipment cost, and in addition, the time service signature information is maliciously tampered.
Content of application
The embodiment of the application provides a block chain-based time service and evidence storage method and device, a block chain node and a storage medium, so as to reduce the equipment pressure of a time service center platform and improve the safety of time service signature information.
An embodiment of the present application provides a block chain-based time service and evidence storage method, including:
a block link point receives first time service signature information sent by a time service center platform, wherein the first time service signature information is obtained by signing a first time stamp corresponding to a receiving time and a block hash value of a first service data block by the time service center platform after the time service center platform receives the block hash value of the first service data block; the first service data block is generated by the block link node according to a plurality of to-be-timed data sent by a plurality of first time service application parties received in a first time interval;
verifying the first time service signature information, and if the verification is passed, generating a second business data block according to the first time service signature information and a plurality of to-be-time-service data sent by a plurality of second time service application parties received in a second time interval, wherein the block head of the second business data block comprises an identifier of the first business data block, the identifier of the first business data block indicates that the second business data block comprises the first time service signature information, the first time interval is adjacent to the second time interval, and the second time interval is after the first time interval;
and adding the second service data block to a block chain network, and sending time service information to each of the plurality of first time service application parties, wherein the time service information comprises the block height of the first service data block.
An embodiment of an aspect of the present application provides a time service evidence storage device based on a block chain, including:
the receiving signature module is used for receiving first time service signature information sent by a time service center platform, wherein the first time service signature information is obtained by the time service center platform generating a first time stamp according to the time of receiving the block hash value of a first service data block and signing the first time stamp and the block hash value of the first service data block; the first service data block is generated by the block link node according to a plurality of to-be-timed data sent by a plurality of first time service application parties received in a first time interval;
a verification generation module, configured to verify the first time service signature information, and if the verification passes, generate a second service data block according to the first time service signature information and a plurality of to-be-time-service data sent by a plurality of second time service requesters received within a second time interval, where a block header of the second service data block includes an identifier of the first service data block, the identifier of the first service data block indicates that the second service data block includes the first time service signature information, the first time interval is adjacent to the second time interval, and the second time interval is after the first time interval;
and an adding and sending module, configured to add the second service data block to a block chain network, and send time service information to each of the first time service applications, where the time service information includes a block height of the first service data block.
An aspect of an embodiment of the present application provides a block link point, including: a processor, a memory, a network interface; the processor is connected to a memory and a network interface, wherein the network interface is used for providing a data communication function, the memory is used for storing a computer program, and the processor is used for calling the computer program to execute the method in the aspect in the embodiment of the present application.
In one aspect, an embodiment of the present invention provides a storage medium, where a computer program is stored in the storage medium, where the computer program includes program instructions; the program instructions, when executed by a processor, cause the processor to perform a block chain based time and credit method as described above in an aspect of the embodiments of the present application.
In the embodiment of the application, the block link point receives first time service signature information sent by a time service center platform, verifies the first time service signature information, generates a second business data block according to the first time service signature information and a plurality of to-be-time-service data sent by a plurality of second time service application parties received in a second time interval if the verification is passed, adds the second business data block to the block chain network, and sends the time service information to each first time service application party in the plurality of first time service application parties. The first time service signature information is obtained by the time service center platform generating a first time stamp according to the time of receiving the block hash value of the first service data block and signing the first time stamp and the block hash value of the first service data block; the first service data block is generated by the block link point according to a plurality of to-be-timed data sent by a plurality of first time service application parties received in a first time interval. Therefore, the method and the device can reduce the equipment pressure of the time service center platform and improve the safety of the time service signature information.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1a is a schematic diagram of a system architecture according to an embodiment of the present application;
FIG. 1b is a schematic diagram of a block link point system according to an embodiment of the present disclosure;
fig. 1c is a block chain diagram according to an embodiment of the present application;
fig. 2 is a schematic flowchart of a block chain-based time service and evidence storage method according to an embodiment of the present disclosure;
fig. 3a and 3b are schematic flow diagrams of a block chain-based time service and evidence storage method according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a block chain-based time service evidence storing device according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of a blockchain node according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Please refer to fig. 1a, which is a schematic diagram of a system architecture according to an embodiment of the present application. At present, with the rapid development of network technology and the attention of people on data security, the blockchain is greatly emphasized and applied; the time service and evidence storage method mainly comprises the steps that a time service applicant sends data to be time service to a national time service center, the national time service center generates a time stamp according to the time of receiving the data to be time service sent by the time service applicant, the time stamp and the data to be time service are signed, time service signature information of the data to be time service is obtained, the time service signature information is returned to the time service applicant, and the time service applicant stores the time service signature information. The method has the problems of overlarge pressure of a national time service center and overhigh maintenance equipment cost, and also has the condition that time service signature information is maliciously tampered, so that a plurality of data are packaged to generate blocks by using block chain link points, and the time service data is processed by using the characteristic that the block chain cannot be tampered. As shown in fig. 1a, the system architecture diagram includes a block chain node system, block chain node points, a time service center platform, and a plurality of time service applications and terminals where the plurality of time service applications are located.
The nodes (including the block chain nodes), the time service center platform, and the terminals where the plurality Of time service applications are located in the block chain node system may be computer devices, including mobile phones, tablet computers, notebook computers, palm computers, smart speakers, mobile internet devices (MID, mobile internet devices), Point Of Sale (POS) machines, wearable devices (e.g., smart watches, smart bracelets, etc.), and the like.
In addition, please refer to fig. 1b, which is a schematic diagram of a block link point system according to an embodiment of the present disclosure. As shown in fig. 1b, a block-linked node system may include a plurality of nodes, each of which may receive input information during normal operation and maintain shared data in the block-linked node system based on the received input information. In order to ensure information intercommunication in the block link point system, information connection can exist between each node in the block link point system, and information transmission can be carried out between the nodes through the information connection. For example, when any node in the blockchain node system receives input information, other nodes in the blockchain node system acquire the input information according to a consensus algorithm, and store the input information as data in shared data, so that the data stored in all nodes in the blockchain node system are consistent.
Each node in the block chain node point system has a corresponding node identifier, and each node in the block chain node point system can store the node identifiers of other nodes in the block chain node point system, so that the generated block can be broadcast to other nodes in the block chain node point system according to the node identifiers of other nodes. Each node may maintain a node identifier list as shown in the following table, and store the node name and the node identifier in the node identifier list correspondingly. The node identifier may be an IP (Internet Protocol) address and any other information that can be used to identify the node, and table 1 only illustrates the IP address as an example.
TABLE 1
Node name Node identification
Node 1 117.114.151.174
Node 2 117.116.189.145
… …
Node N 119.123.789.258
Each node in the blockchain nodal system stores one identical blockchain. A block chain is composed of a plurality of blocks, please refer to fig. 1c, which is a block chain diagram provided in the present embodiment of the present application, as shown in fig. 1c, the block chain is composed of a plurality of blocks, a starting block includes a block header and a block main body, the block header stores an input information characteristic value, a version number, a timestamp and a difficulty value, and the block main body stores input information; the next block of the starting block takes the starting block as a parent block, the next block also comprises a block head and a block main body, the block head stores the input information characteristic value of the current block, the block head characteristic value of the parent block, the version number, the timestamp and the difficulty value, and the like, so that the block data stored in each block in the block chain is associated with the block data stored in the parent block, and the safety of the input information in the block is ensured.
In view of the problems of the above time service and evidence storage method, the embodiment of the present application provides a time service and evidence storage method based on a block chain, which is a novel application mode of computer technologies such as distributed data storage, point-to-point transmission (P2P transmission), consensus mechanism, encryption algorithm, and is essentially a decentralized database, by using a block chain node to package a plurality of data to generate a block and processing time service data according to the characteristic that the block chain cannot be tampered; the blockchain can be composed of a plurality of serial transaction records (also called blocks) which are connected in series by cryptography and protect the contents, and the distributed accounts connected in series by the blockchain can effectively record the transactions by multiple parties and can permanently check the transactions (can not be tampered). The consensus mechanism is a mathematical algorithm for establishing trust and obtaining rights and interests among different nodes in the block chain network; that is, the consensus mechanism is a mathematical algorithm commonly recognized by network nodes in the blockchain.
Further, as shown in fig. 1a, in the process of implementing the time service and verification method, a plurality of first time service application parties send a plurality of data to be time-service to the block link point through a terminal where each first time service application party is located, the block link node receives the plurality of data to be time-service sent by the plurality of first time service application parties in a first time interval, generates a first service data block according to the plurality of data to be time-service sent by the plurality of first time service application parties, sends the block hash value of the first service data block to the time service center platform, the time service center platform generates a first time stamp according to the time of receiving the block hash value of the first service data block, signs the first time stamp and the block value of the first service data block to obtain first time service signature information, returns the first time service signature information to the block link point, and the block link point verifies the first time service signature data, if the verification is passed, generating a second service data block according to the identification of the first service data block, the first time service signature data and a plurality of to-be-time service data sent by a plurality of second time service application parties received in a second time interval, adding the second service data block to the block chain network, and sending time service information to each first time service application party of the plurality of first time service application parties, wherein the time service information comprises the block height of the first service data block. And then, the first time service applicant can obtain the first service data block according to the block height of the first service data block in the time service information sent by the block chain node, judge whether the first service data block contains data to be verified, if the first service data block contains the data to be verified, find the first time service signature information in the second service data block according to the identifier of the first service data block, wherein the first time service signature information carries a first timestamp and verifies the first time service signature information, and if the verification passes, the time corresponding to the first timestamp of the data to be verified is determined to be timed by the time service center platform.
Further, please refer to fig. 2, which is a flowchart illustrating a block chain-based time service and evidence storage method according to an embodiment of the present disclosure. As shown in fig. 2, the method may include:
step S101, a block link point receives first time service signature information sent by a time service center platform, wherein the first time service signature information is obtained by signing a first time stamp corresponding to a receiving time and a block hash value of a first service data block by the time service center platform after the time service center platform receives the block hash value of the first service data block; the first service data block is generated by the block link node according to a plurality of to-be-timed data sent by a plurality of first time service application parties received in a first time interval.
The Time service center platform is a management mechanism platform of standard Time and is used for generating a Time stamp of the standard Time for the received data and signing the Time stamp, so that a proof with public credibility is generated for a Time point of storing the data certificate.
In addition, the first service data block further includes third signature time service information of a time service center platform to a third service data block, and the third signature time service information is obtained by the time service center platform signing a third timestamp corresponding to a receiving time and a block hash value of the third service data block after the time service center platform receives the block hash value of the third service data block. The third service data block is a service data block with a block height smaller than that of the first service data block, and the absolute difference value of the difference between the block height and the block height of the first service data block is the smallest.
Before executing step S101, the block link point generates a first service data block according to a plurality of to-be-timed data sent by a plurality of first time service applications received within a first time interval, third signature time service information, and a block height of a third service data block, and adds the first service data block to a block link network, which specifically implements the following processes:
and the block chain node generates a block head and a block body according to a plurality of data to be timed, which are sent by a plurality of first timing applications and received in a first time interval, adds third signature timing information and the block height of a third service data block into the block head, and forms a first service data block together according to the block body and the block head added with the third signature timing information and the identifier of the third service data block. Here, the block body of the first service data block stores a tacle tree generated by the block link point according to a plurality of data to be timed, which are sent by a plurality of first time service applications received in the first time interval, and the block head of the first service data block stores a block hash value of the first service data block, a block hash value of a parent block, a version number, a timestamp, and a difficulty value, and further includes third signature time service information and an identifier of a third service data block.
The block chaining point then adds the first traffic data block to the block chaining network.
In one possible embodiment, before the block link point receives the first time service signature information sent by the time service center platform, the method includes:
the block link node sends the first service data block to a consensus node in the block link network, so that the consensus node obtains a check hash value according to a plurality of data to be timed sent by the first timing applications in the first service data block, and returns a consensus confirmation message when the check hash value is consistent with the hash value of the first service data block;
and adding the first service data block to the blockchain network when the ratio of the number of the received consensus confirmation messages to the number of the consensus nodes reaches a preset consensus ratio.
For example, the block link point sends the first service data to 1 consensus node in the block link network, the consensus node broadcasts the first service data block to other 99 consensus nodes through a broadcast mechanism, then, a consensus node a of the 100 consensus nodes calculates a hash value corresponding to each of the multiple pieces of time service data sent by multiple first time service applicants in the first service data block by using a hash algorithm, calculates a check hash value hash1 according to the hash value corresponding to each piece of time service data, compares the hash value hash2 of the hash1 and the hash value hash2 of the first service data block, and obtains that the hash1 is consistent with the hash2, and then the consensus node a returns a consensus confirmation message to the block link point. According to the above mode, 80 common nodes finally return common confirmation messages to the block chain nodes. And the block link node obtains that the proportion of the consensus confirmation message returned by the consensus node is 80% and is greater than the preset consensus proportion of 51% according to the number of the received consensus confirmation messages of 80 and the number of the consensus nodes of 100, and then adds the first service data block to the block link network.
And then, the block chain node sends the block hash value of the first service data block to a time service center platform, the time service center platform generates a first time stamp according to the time of receiving the block hash value of the first service data block, the first time stamp and the block hash value of the first service data block are signed by using an account number private key of the time service center platform, first time service signature information is obtained, and the first time service signature information is sent to the block chain node. Because the time service center platform is an authority, the first time service signature information has public trust.
And step S102, verifying the first time service signature information, and if the verification is passed, generating a second service data block according to the first time service signature information and a plurality of to-be-time-service data sent by a plurality of second time service application parties received in a second time interval.
Wherein the block header of the second service data block includes an identifier of the first service data block, the identifier of the first service data block indicates that the second service data block includes the first time service signature information, the first time interval is adjacent to the second time interval, and the second time interval is after the first time interval. Here, the time interval lengths of the first time interval and the second time interval may be 25ms, 1s, 1min, or the like, which is not limited in the embodiment of the present application.
In one possible implementation, the first time service signature information carries the first timestamp and a block hash value of the first service data block;
the verifying the first time service signature information includes:
the block chain node acquires a signature verification public key of the time service center platform, and performs signature verification on the first time service signature information according to the signature verification public key of the time service center platform to obtain a first check code;
converting the first timestamp and the block hash value of the first service data block into a second check code by adopting a hash algorithm;
and if the first check code is consistent with the second check code, the first time service signature information is verified to pass.
For example, the block link point obtains the signature verification public key of the time service center platform in the block chain network according to the identification of the time service center platform, and verifies the signature of the first time service signature information by using the signature verification public key of the time service center platform to obtain hash3, then performs hash calculation on the first time stamp and the block hash value of the first service data block by using a hash algorithm to obtain hash4, and if the hash3 is consistent with the hash4 by comparison, the verification is passed, which indicates that the first time service signature information is time-service through the time service center platform and is real.
And then, generating a second service data block by the block link point according to the first time service signature information and a plurality of to-be-time-service data sent by a plurality of second time service application parties received in a second time interval, wherein the specific implementation process is as follows:
and the block chain node generates a block body and a block head according to a plurality of data to be timed sent by the second time service application parties, adds the first time service signature information to the block head, and obtains the second service data block based on the block head and the block body added with the first time service signature information.
The block body of the second service data block stores a merkel tree generated by the block link point according to a plurality of data to be timed, which are sent by a plurality of second timing applications and received in a second time interval, and the block head of the second service data block stores a block hash value of the second service data block, a block hash value of a parent block, a version number, a timestamp and a difficulty value, and also includes first signature timing information and an identifier of the first service data block, wherein the identifier of the first service data block may be the block hash value of the first service data block.
Step S103, adding the second service data block to the block chain network, and sending the time service information to each first time service application party in the plurality of first time service application parties.
The time service information includes a block height of the first service data block.
Specifically, the block link node sends the second service data block to a consensus node in the block link network, and the consensus node performs consensus verification on the second service data block, for example, the consensus verification method may be that the consensus node calculates a plurality of to-be-timed data sent by a plurality of second timing applications in the second service data block by using a hash algorithm to obtain a merkel hash value, and if the merkel hash value is consistent with the block hash value of the second service data block, determining that the check is passed and returning a consensus confirmation message to the block chain node, wherein the block chain node obtains the proportion of the consensus confirmation message returned by the consensus node according to the number of the received consensus confirmation messages and the number of the consensus nodes, and adding the second service data block to the blockchain network if the ratio is greater than or equal to a preset consensus ratio (e.g., two-thirds). And then, the block link node sends the timing information containing the block height of the first service data block to each first timing applicant in the plurality of first timing applicants.
And then, the first time service applicant obtains the first service data block in the block chain network according to the block height of the first service data block in the time service information, inquires whether the first service data block contains data to be time-service, obtains the first time service signature information in the block chain network if the first service data block contains the data to be time-service, verifies the first time service signature information, and sends a time service confirmation message to the block chain link point if the verification is passed.
Further, after receiving a time service confirmation message returned by the first time service application party, the block link point determines the value of the virtual asset to be transferred, and transfers the virtual asset of which the value is the value of the virtual asset to be transferred from the digital account of the first time service application party to the digital account of the time service center platform.
The virtual asset value to be transferred is determined by the quantity of the data to be timed contained in the first service data block.
For example, the service asset transfer value of the time service center platform is 10 bitcoins, that is, the time service center platform signs a name of the data to be time-service sent by the time service applicant, and the time service applicant needs to transfer 10 bitcoins to the digital account of the time service center platform. At this time, if the number of the to-be-timed data included in the first service data block is 100, the value of the to-be-transferred virtual asset is the ratio of the transfer value of the service asset to the number of the to-be-timed data included in the first service data block, that is, 0.1 bit of money, and then the block is a blockThe chain link point transmits 0.1 bit currency data b to be timed1The digital account of (2) is transferred to the digital account of the time service center platform. The virtual asset value to be transferred is determined by the quantity of the data to be time-service contained in the first service data block, so that the application cost of a time-service applicant is reduced.
In the embodiment of the application, the block link point receives first time service signature information sent by a time service center platform, verifies the first time service signature information, generates a second business data block according to the first time service signature information and a plurality of to-be-time-service data sent by a plurality of second time service application parties received in a second time interval if the verification is passed, adds the second business data block to the block chain network, and sends the time service information to each first time service application party in the plurality of first time service application parties. The first time service signature information is obtained by the time service center platform generating a first time stamp according to the time of receiving the block hash value of the first service data block and signing the first time stamp and the block hash value of the first service data block; the first service data block is generated by the block link point according to a plurality of to-be-timed data sent by a plurality of first time service application parties received in a first time interval. Therefore, the method and the device can reduce the equipment pressure of the time service center platform and improve the safety of the time service signature information.
Please refer to fig. 3a, which is a flowchart illustrating a block chain-based time service and evidence storage method according to an embodiment of the present disclosure. As shown in fig. 3a, the method may include:
in step S201, a plurality of first time service applications send a plurality of data to be time-serviced to the block link point in a first time interval.
In step S202, a first service data block is generated by the block link node.
Specifically, the block link point generates a first service data block according to a plurality of to-be-timed data sent by a plurality of first time service application parties received in a first time interval. Here, the first service data block may be understood as a first service data block storing a plurality of data to be timed.
In step S203, the block link node uploads the first service data block to the block link network.
Here, the specific implementation manner of step S203 may refer to the description that the block chain node adds the first service data block to the block chain network in step S101 in the corresponding embodiment, which is not described herein again.
Step S204, the block link point sends the block hash value of the first service data block to the time service center platform.
In step S205, the time service center platform returns the first time service signature information to the block link point.
Specifically, after receiving the block hash value of the first service data block, the time service center platform generates a first timestamp according to the receiving time, signs the first timestamp and the block hash value of the first service data block by using a private key of the time service center platform to obtain first time service signature information, and returns the first time service signature information to the block chain node.
And step S206, a plurality of second time service application parties send a plurality of data to be time service to the block link points in a second time interval.
Wherein the second time interval is adjacent to the first time interval and the second time interval is subsequent to the first time interval. Here, the time interval lengths of the first time interval and the second time interval may be 25ms, 1s, 1min, or the like, which is not limited in the embodiment of the present application.
And step S207, verifying the first time service signature information by the block link point, and if the verification is passed, generating a second service data block.
The first time service signature information carries a first time stamp and a block hash value of the first service data block.
Specifically, the block link point obtains a signature verification public key of the time service center platform, and signature verification is carried out on the first time service signature information according to the signature verification public key of the time service center platform to obtain a first check code; converting the first timestamp and the block hash value of the first service data block into a second check code by adopting a hash algorithm; and if the first check code is consistent with the second check code, the first time service signature information is verified to be passed. And then, the block link point generates a block body and a block head according to a plurality of data to be timed, which are received in a second time interval and sent by a plurality of second timing applications, adds the first timing signature information and the identifier of the first service data block into the block head, and obtains a second service data block based on the block head and the block body after the first timing signature information and the identifier of the first service data block are added. Wherein the first time interval is adjacent to the second time interval, and the second time interval is after the first time interval.
In step S208, the block link node uploads the second service data block to the block link network.
Here, the specific implementation manner of step S208 may refer to the description that the block chain node adds the first service data block to the block chain network in step S101 in the corresponding embodiment, which is not described herein again.
In step S209, the block link node returns time service information to each of the first time service applications.
The time service information comprises the block height of the first service data block.
Please refer to fig. 3b, which is a flowchart illustrating a block chain-based time service and evidence storage method according to an embodiment of the present disclosure. As shown in fig. 3b, the method may further include:
in step S210, the verifier sends a verification request for the data to be verified to the verified party.
Wherein the verifying party includes but is not limited to a time service applying party.
Step S211, the verified party returns the time service information of the data to be verified to the verifying party.
The time service information of the data to be verified comprises the block height of the first service data block.
In step S212, the verifier acquires the first service data block in the blockchain network.
Specifically, the verifier acquires the first service data block in the blockchain network according to the block height of the first service data.
In step S213, the verifier queries whether the first service data block contains data to be verified.
The time service information of the data to be checked comprises a Mercker Hash value of a Mercker tree where the data to be checked is located and a Mercker path of the data to be checked, wherein the Mercker path of the data to be checked represents the position of the data to be checked in the Mercker tree where the data to be checked is located;
the querying whether the first service data block contains data to be verified includes:
comparing the Mercker hash value of the Mercker tree where the data to be checked are located with the block hash value of the first service data block;
if the merkel hash value is consistent with the block hash value of the first service data block, obtaining target data in a merkel tree in the first service data block according to the merkel path of the data to be checked;
and if the target data is consistent with the data to be verified, determining that the first service data block contains the data to be verified.
For example, the verifier a receives the data k to be verified sent by the verified party k2The time service information of (a) includes the block height 98 of the first service data block, i.e. the data k to be verified2Block height of the block where the data k to be verified is located2The Mercker hash value hash1-8 of the Mercker tree, and the data k to be verified2The merkel path includes hash1-8, hash1234, hash12, hash1 and d1, then, according to the block height 98 of the first service data block, the verifier a obtains the first service data block in the block chain network, compares the block hash value hash2 of the first service data block with the merkel hash value hash1-8 to obtain that the hash2 is consistent with the hash1-8, then according to the hash1-8 in the merkel path, the positions of the hash1234, the hash12, the hash1 and the d1 are found from the root of the merkel tree in the first service data block, and the data d is obtained at the position of the d1, that is, the target data is hash1-8, hash12, hash 3932 and d 358 are found in sequenced, obtaining data k to be verified through comparison2If the data is consistent with the data d, determining that the first service data block contains the data k to be checked2。
Step S214, the checking party obtains the first time service signature information in the block chain network.
For example, the verifier finds a second service data block with a hash2 in the block header according to the identifier of the first service data block, that is, the block hash value hash2 of the first service data block, and obtains first time service signature information in the second service data block, where the first time service signature information carries a first timestamp.
Step S215, the checking party checks the first time service signature information, and if the checking is passed, the data to be checked is confirmed to be successfully time-serviced.
For example, the verifier acquires the signature verification public key of the time service center platform in the blockchain network, applies the signature verification public key of the time service center platform to verify the first time service signature information to obtain a hash11, calculates the first timestamp and the block hash value of the first service data block by using a hash algorithm to obtain a hash12, and if the hash11 is consistent with the hash12, passes verification and determines that the data k to be verified is2The time is given by the time center at 16 points 20 minutes and 11 seconds at 2 month 1 day 2020 corresponding to the first timestamp.
In the embodiment of the application, the block link node point generates a first service data block from a plurality of time to be served data sent by a plurality of first time-service application parties received in a first time interval, transmits a block hash value of the first service data block to the time-service central platform after uploading the first service data block to the block chain network, the time-service central platform generates a first time stamp according to the time of receiving the block hash value, signs the first time stamp and the block hash value to obtain first time-service signature information, transmits the first time-service signature information to the block link node, generates a second service data block according to the first time-service signature information and a plurality of time to be served data sent by a plurality of second time-service application parties received in a second time interval, and uploads the second service data block to the block chain network, and returning the time service information to each first time service application party, and transferring the virtual assets with the numerical values consistent with the numerical values of the virtual assets to be transferred from the digital account of the first time service application party to the digital account of the time service center platform after receiving the time service confirmation message sent by the first time service application party. In addition, the second service data block containing the first time service signature information is added into the block chain network, so that the safety of the time service signature information is improved.
Fig. 4 is a schematic structural diagram of a timing and evidence-storing device based on a block chain according to an embodiment of the present application. The block chain based time service evidence storing device may be a computer program (including program code) running in a computer device, for example, the block chain based time service evidence storing device is an application software; the apparatus may be used to perform the corresponding steps in the methods provided by the embodiments of the present application. As shown in fig. 4, the time service and evidence keeping device 4 may include: a receiving signature module 41, a verification generation module 42 and an adding and sending module 43.
The receiving signature module 41 is configured to receive first time service signature information sent by a time service center platform, where the first time service signature information is obtained by signing, by the time service center platform, a first timestamp corresponding to a receiving time and a block hash value of a first service data block after the time service center platform receives the block hash value of the first service data block; the first service data block is generated by the block link node according to a plurality of to-be-timed data sent by a plurality of first time service application parties received in a first time interval; the first time service signature information carries the first time stamp and the block hash value of the first service data block, and the time service center platform is a management mechanism platform of standard time and is used for generating the time stamp of the standard time for the received data and signing the time stamp;
a verification generation module 42, configured to verify the first time service signature information, and if the verification passes, generate a second service data block according to the first time service signature information and a plurality of to-be-time-service data sent by a plurality of second time service requesters received within a second time interval, where a block header of the second service data block includes an identifier of the first service data block, the identifier of the first service data block indicates that the second service data block includes the first time service signature information, the first time interval is adjacent to the second time interval, and the second time interval is after the first time interval;
an adding and sending module 43, configured to add the second service data block to a block chain network, and send time information to each of the first time service applications, where the time information includes a block height of the first service data block.
The specific functional implementation manners of the signature receiving module 41, the verification generating module 42, and the adding and sending module 43 may refer to steps S101 to S103 in the embodiment corresponding to fig. 2, which are not described herein again.
Referring again to fig. 4, the apparatus further comprises:
a sending module 44, configured to send the first service data block to a consensus node in the blockchain network, so that the consensus node obtains a check hash value according to a plurality of data to be timed sent by the first time service requesters in the first service data block, and returns a consensus confirmation message when the check hash value is consistent with the hash value of the first service data block;
an adding module 45, configured to add the first service data block to the blockchain network when it is determined that a ratio of the number of the received consensus confirmation messages to the number of the consensus nodes reaches a preset consensus ratio.
The specific functional implementation manners of the sending module 44 and the adding module 45 may refer to step S101 in the embodiment corresponding to fig. 2, which is not described herein again.
Referring again to fig. 4, the verification generation module 42 includes: a signature verification unit 421, a conversion unit 422, a verification result determination unit 423, and a block generation unit 424.
The signature verification unit 421 is configured to obtain a signature verification public key of the time service center platform, and verify the signature of the first time service signature information according to the signature verification public key of the time service center platform to obtain a first check code;
a converting unit 422, configured to convert the first timestamp and the block hash value of the first service data block into a second check code by using a hash algorithm;
a verification result determining unit 423 for passing verification of the first time service signature information if the first verification code is identical to the second verification code.
A verification generation module 42, comprising:
a block generating unit 424, configured to generate a block body and a block header according to the plurality of pieces of data to be timed sent by the plurality of second time service requesters, add the first time service signature information to the block header, and obtain the second service data block based on the block header and the block body to which the first time service signature information is added.
The specific functional implementation manners of the signature verification unit 421, the conversion unit 422, the verification result determination unit 423, and the block generation unit 424 may refer to step S102 in the corresponding embodiment of fig. 2, which is not described herein again.
Referring again to fig. 4, the apparatus further comprises:
and a transfer determining module 46, configured to determine, when receiving a time service confirmation message returned by the first time service applicant, a value of an asset to be transferred according to the quantity of the data to be time service included in the first service data block, and transfer a virtual asset whose value is consistent with the value of the asset to be transferred from the digital account of the first time service applicant to the digital account of the time service center platform.
The specific function implementation manner of the transfer module 46 may refer to step S212 in the embodiment corresponding to fig. 3b, which is not described herein again.
In the embodiment of the application, the block link point receives first time service signature information sent by a time service center platform, verifies the first time service signature information, generates a second business data block according to the first time service signature information and a plurality of to-be-time-service data sent by a plurality of second time service application parties received in a second time interval if the verification is passed, adds the second business data block to the block chain network, and sends the time service information to each first time service application party in the plurality of first time service application parties. The first time service signature information is obtained by the time service center platform generating a first time stamp according to the time of receiving the block hash value of the first service data block and signing the first time stamp and the block hash value of the first service data block; the first service data block is generated by the block link point according to a plurality of to-be-timed data sent by a plurality of first time service application parties received in a first time interval. Therefore, the method and the device can reduce the equipment pressure of the time service center platform and improve the safety of the time service signature information.
The time keeping and evidence providing device 4 in the embodiment shown in fig. 4 can be implemented by the block link point 500 shown in fig. 5. Please refer to fig. 5, which is a schematic structural diagram of a blockchain node according to an embodiment of the present disclosure. As shown in fig. 5, the above block chain node 500 may include: one or more processors 501, memory 502, and transceiver 503. The processor 501, memory 502, and transceiver 503 are connected by a bus 504. The transceiver 503 is configured to obtain feedback information of a plurality of passenger accounts or send rating information of a target driver account, and the memory 502 is configured to store a computer program, where the computer program includes program instructions; the processor 501 is configured to execute the program instructions stored in the memory 502, and perform the following operations:
receiving first time service signature information sent by a time service center platform, wherein the first time service signature information is obtained by the time service center platform by signing a first time stamp corresponding to a receiving time and a block hash value of a first service data block after the time service center platform receives the block hash value of the first service data block; the first service data block is generated by the block link node according to a plurality of to-be-timed data sent by a plurality of first time service application parties received in a first time interval, and the time service center platform is a standard time management mechanism platform and is used for generating a standard time timestamp for the received data and signing the timestamp;
verifying the first time service signature information, and if the verification is passed, generating a second business data block according to the first time service signature information and a plurality of to-be-time-service data sent by a plurality of second time service application parties received in a second time interval, wherein the block head of the second business data block comprises an identifier of the first business data block, the identifier of the first business data block indicates that the second business data block comprises the first time service signature information, the first time interval is adjacent to the second time interval, and the second time interval is after the first time interval;
and adding the second service data block to a block chain network, and sending time service information to each of the plurality of first time service application parties, wherein the time service information comprises the block height of the first service data block.
In an embodiment, before executing receiving the first time service signature information sent by the time service center platform, the processor 501 specifically executes the following steps:
sending the first service data block to a consensus node in the block chain network, so that the consensus node obtains a check hash value according to a plurality of data to be timed sent by the plurality of first timing applications in the first service data block, and returns a consensus confirmation message when the check hash value is consistent with the hash value of the first service data block;
and adding the first service data block to the blockchain network when the ratio of the number of the received consensus confirmation messages to the number of the consensus nodes reaches a preset consensus ratio.
In one embodiment, the first time service signature information carries the first timestamp and a block hash value of the first service data block;
the processor 501, when performing verification on the first time service signature information, specifically performs the following steps:
the block chain node acquires a signature verification public key of the time service center platform, and performs signature verification on the first time service signature information according to the signature verification public key of the time service center platform to obtain a first check code;
converting the first timestamp and the block hash value of the first service data block into a second check code by adopting a hash algorithm;
and if the first check code is consistent with the second check code, the first time service signature information is verified to pass.
In an embodiment, the processor 501, when executing a plurality of to-be-timed data sent by a plurality of second time service applications received in a second time interval according to the first time service signature information, generates a second service data block, specifically executes the following steps:
and generating a block body and a block head according to a plurality of data to be timed sent by the second time service application parties, adding the first time service signature information to the block head, and obtaining the second service data block based on the block head and the block body after the first time service signature information is added.
In one embodiment, the processor 501 further performs the following steps:
and under the condition of receiving the time service confirmation message returned by the first time service applicant, determining the value of the asset to be transferred according to the quantity of the data to be time service contained in the first service data block, and transferring the virtual asset with the value consistent with the value of the asset to be transferred from the digital account of the first time service applicant to the digital account of the time service center platform.
It should be understood that the block link point 500 described in this embodiment may perform the description of the above time service and evidence preservation method based on the block chain in the embodiment corresponding to fig. 2 and fig. 3a and 3b, and may also perform the description of the above time service and evidence preservation device based on the block chain in the embodiment corresponding to fig. 4, which is not described herein again. In addition, the beneficial effects of the same method are not described in detail.
Further, here, it is to be noted that: an embodiment of the present application further provides a computer-readable storage medium, where a computer program executed by the aforementioned block chain-based time service and evidence storage device 4 is stored in the computer-readable storage medium, and the computer program includes program instructions, and when the processor executes the program instructions, the description of the block chain-based time service and evidence storage method in the embodiment corresponding to fig. 2 or fig. 3a and fig. 3b can be executed, so that details are not repeated here. In addition, the beneficial effects of the same method are not described in detail. For technical details not disclosed in embodiments of the computer-readable storage medium referred to in the present application, reference is made to the description of embodiments of the method of the present application. As an example, program instructions may be deployed to be executed on one computing device or on multiple computing devices at one site or distributed across multiple sites and interconnected by a communication network, which may comprise a block chain system.
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 computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
The method and the related apparatus provided by the embodiments of the present application are described with reference to the flowchart and/or the structural diagram of the method provided by the embodiments of the present application, and each flow and/or block of the flowchart and/or the structural diagram of the method, and the combination of the flow and/or block in the flowchart and/or the block diagram can be specifically implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block or blocks of the block diagram. These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block or blocks of the block diagram. These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block or blocks.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present application and is not to be construed as limiting the scope of the present application, so that the present application is not limited thereto, and all equivalent variations and modifications can be made to the present application.

Claims (10)

1. A time service evidence storing method based on a block chain is characterized by comprising the following steps:
a block link point receives first time service signature information sent by a time service center platform, wherein the first time service signature information is obtained by signing a first time stamp corresponding to a receiving time and a block hash value of a first service data block by the time service center platform after the time service center platform receives the block hash value of the first service data block; the first service data block is generated by the block link node according to a plurality of to-be-timed data sent by a plurality of first time service application parties received in a first time interval;
the first time service signature information is verified, if the verification is passed, a second business data block is generated according to the first time service signature information and a plurality of data to be time service sent by a plurality of second time service application parties received in a second time interval, wherein the block head of the second business data block comprises an identifier of the first business data block, and the identifier of the first business data block indicates that the second business data block comprises the first time service signature information;
and adding the second service data block to a block chain network, and sending time service information to each of the plurality of first time service application parties, wherein the time service information comprises the block height of the first service data block.
2. The method of claim 1, further comprising:
a verifying party acquires time service information of data to be verified, wherein the time service information of the data to be verified comprises the block height of a first service data block;
acquiring the first service data block in the block chain network according to the block height of the first service data block, and inquiring whether the first service data block contains the data to be verified;
if the data to be verified is contained, acquiring a second service data block containing the identifier of the first service data block in a block header according to the identifier of the first service data block, and acquiring first time service signature information in the second service data block, wherein the first time service signature information carries the first time stamp;
and verifying the first time service signature information, and if the verification is passed, determining that the time corresponding to the first timestamp is the time service time of the data to be verified.
3. The method according to claim 2, wherein the time service information of the data to be verified includes a merkel hash value of a merkel tree where the data to be verified is located, and a merkel path of the data to be verified, the merkel path of the data to be verified represents a position of the data to be searched in the merkel tree where the data to be verified is located;
the querying whether the first service data block contains data to be verified includes:
the verifying party compares the Mercker hash value of the Mercker tree where the data to be verified are located with the block hash value of the first service data block;
if the Mercker hash value is consistent with the block hash value of the first service data block, obtaining target data in a Mercker tree in the first service data block according to the Mercker path of the data to be checked;
and if the target data is consistent with the data to be verified, determining that the first service data block contains the data to be verified.
4. The method according to claim 1, wherein before the block chain node receives the first time service signature information sent by the time service center platform, the method comprises:
the block link point sends the first service data block to a consensus node in the block link network, so that the consensus node obtains a check hash value according to a plurality of data to be timed sent by the plurality of first timing applications in the first service data block, and returns a consensus confirmation message under the condition that the check hash value is consistent with the hash value of the first service data block;
and adding the first service data block to the block chain network under the condition that the ratio of the number of the received consensus confirmation messages to the number of the consensus nodes reaches a preset consensus ratio.
5. The method of claim 1, wherein the first time service signature information carries the first timestamp and a block hash value of the first service data block;
the verifying the first time service signature information includes:
the block chain node acquires a signature verification public key of the time service center platform, and performs signature verification on the first time service signature information according to the signature verification public key of the time service center platform to obtain a first check code;
converting the first timestamp and the block hash value of the first service data block into a second check code by adopting a hash algorithm;
and if the first check code is consistent with the second check code, the first time service signature information is verified to pass.
6. The method according to claim 1, wherein the generating a second service data block according to the first time service signature information and a plurality of to-be-time-service data sent by a plurality of second time service application parties received in a second time interval comprises:
and the block chain node generates a block body and a block head according to a plurality of data to be timed sent by the second time service application parties, adds the first time service signature information to the block head, and obtains the second service data block based on the block head and the block body after the first time service signature information is added.
7. The method of claim 1, further comprising:
and under the condition that the block chain node receives a time service confirmation message returned by the first time service applicant, determining the value of the asset to be transferred according to the quantity of the data to be time service contained in the first service data block, and transferring the virtual asset with the value consistent with the value of the asset to be transferred from the digital account of the first time service applicant to the digital account of the time service center platform.
8. The method of any one of claims 1 to 7, wherein the time service central platform is a standard time authority platform for generating a standard time timestamp for received data and signing the timestamp.
9. The utility model provides a device is deposited in time service based on block chain which characterized in that includes:
the receiving signature module is used for receiving first time service signature information sent by a time service center platform, wherein the first time service signature information is obtained by the time service center platform generating a first time stamp according to the time of receiving the block hash value of a first service data block and signing the first time stamp and the block hash value of the first service data block; the first service data block is generated by the block link node according to a plurality of to-be-timed data sent by a plurality of first time service application parties received in a first time interval;
a verification generation module, configured to verify the first time service signature information, and if the verification passes, generate a second service data block according to the first time service signature information and a plurality of to-be-time service data sent by a plurality of second time service application parties received within a second time interval, where a block header of the second service data block includes an identifier of the first service data block, the identifier of the first service data block indicates that the second service data block includes the first time service signature information, the first time interval is adjacent to the second time interval, and the second time interval is after the first time interval;
and the adding and sending module is used for adding the second service data block to a block chain network and sending time service information to each first time service application party in the plurality of first time service application parties, wherein the time service information comprises the block height of the first service data block.
10. A storage medium, characterized in that the storage medium stores a computer program comprising program instructions; the program instructions, when executed by a processor, cause the processor to perform a block chain based credentialing method as recited in any one of claims 1-8.
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