WO2018036440A1

WO2018036440A1 - Data cyclic writing method and system based on block chain

Info

Publication number: WO2018036440A1
Application number: PCT/CN2017/098232
Authority: WO
Inventors: 杨鹏
Original assignee: 杨鹏
Priority date: 2016-08-26
Filing date: 2017-08-21
Publication date: 2018-03-01
Also published as: CN106446705A

Abstract

A data cyclic writing method and system based on a block chain. The method comprises: before new data is written into a data block chain, determining whether a preset cyclic writing triggering condition is satisfied (S101), and if the cyclic writing condition is satisfied, writing the new data block into the data block chain to overwrite an original data block, otherwise, directly writing the new data block, and not overwriting the original data block (S102), so that the volume of the block chain is effectively controlled while useless data can be destroyed. Data is stored into a block chain database to ensure that the data is not tampered with and can be securely stored, in addition, the cyclic writing method allows the volume of the block chain database to be effectively controlled, data satisfying a preset triggering condition is not displayed in a block chain system and is not destroyed by new data, and accordingly privacy and confidentiality are good; the storage of a hash value corresponding to a data block can also ensure that correctness of downloaded data is verified, and accordingly the cyclic writing method and system are secure and convenient and have high practicality.

Description

Data loop writing method and system based on blockchain

Technical field

The present invention relates to the field of computer technologies, and in particular, to a data loop writing method and system based on a blockchain.

Background technique

The existing blockchain systems are chained blockchains. All the data written is permanently stored in the database. Everyone who has access to the network can access and download these permanent data unconditionally. This permanently reserved chain blockchain system has the following two problems: 1. The data to be stored is more and more over time, the block database will become larger and larger, and it is not convenient to save, but it is not All data needs to be saved permanently. Some data only need to be retained within the corresponding years. The data exceeding the age can be deleted. 2. Some confidential documents or personal privacy information stored have certain retention time requirements, and reach a certain time limit. After that, it needs to be destroyed according to the actual situation; 3. The existing blockchain system is a transparent and open system, and its data is provided to everyone for public access, and its privacy and control rights are not effectively controlled.

In addition, when the blockchain database storing data can no longer write data, the blockchain database without backup will cause data to be written in time.

Summary of the invention

The technical problem to be solved by the present invention is to provide a data chain writing method and system based on blockchain, which can effectively control the volume of the blockchain database, and the data satisfying the preset trigger condition will no longer be displayed in the zone. In the blockchain system, it is destroyed by new data coverage, and the privacy and confidentiality are better. At the same time, because multiple blockchains that are backed up each other are used to store data, it can be guaranteed that it will not be because If a blockchain fails, the data to be stored cannot be stored in time, and the data storage continuity and security are better.

The technical solution of the present invention to solve the above technical problems is as follows:

According to an aspect of the present invention, a method for data loop writing based on a blockchain is provided, the method comprising:

S101. Before writing a new data block to the data blockchain, determining whether a preset cyclic write trigger condition is met;

S102. If the cyclic write condition is met, the new data block to be written in the data block chain overwrites the original data block, otherwise the new data block is directly written, and the original data block is not overwritten. .

Advantageous Effects of the Invention: The present invention provides a blockchain-based data loop writing method capable of determining whether data already stored in a blockchain database satisfies a preset before writing new data in a blockchain. The trigger condition, and when the preset condition is met, the new data is written to overwrite the original data, and the volume of the block chain can be effectively controlled while destroying useless data. The invention stores data into the blockchain database, ensures that the data is not falsified, stores the security, and adopts the method of cyclic writing to effectively control the volume of the blockchain database, and the data satisfying the preset trigger condition will not be It is displayed in the blockchain system and is destroyed by new data coverage. It has better privacy and confidentiality, is safe and convenient, and has strong practicability.

Further, the cyclic write trigger condition in the S101 specifically includes a time trigger condition, a storage capacity trigger condition of the main data blockchain, or an event trigger condition.

The beneficial effect of adopting the above further solution: setting the trigger condition according to the actual situation, so as to be applicable to various practical situations.

Further, the method further includes: when writing a new data block into the data block chain, writing a hash value generated by the new data block into the hash block chain;

If the cyclic write condition is satisfied, a new data block is generated in the hash block chain. The hash value overrides the hash value generated by the original data block. Otherwise, the hash value generated by the new data block is directly written, and the hash value generated by the original data block is not overwritten.

The beneficial effect of adopting the above further solution is that each data block generates a hash value and stores it, so that it is convenient to verify whether the downloaded or backed up data is intercepted and falsified during downloading or backup, thereby ensuring the authenticity of the data, because the data is relatively large. , verification is more troublesome, only verifying the hash value is more convenient and quick.

Further, after the S102, the method further includes:

And downloading data in the data block chain, and verifying whether a hash value generated by each data block in the downloaded data is the same as a hash value of a corresponding data block in the hash block chain, and if the same, verifying The downloaded data has not been intercepted and falsified. If it is different, download again until the verification is the same.

The beneficial effect of using the above further solution is to ensure the authenticity of the downloaded data and avoid being misled by the wrong data.

Further, it also includes:

The data blockchain is provided with two, and the two data block chains are mutually backed up;

There are two hash block chains, and the two hash block chains are backups of each other.

The beneficial effect of using the above further solution is that the backup of the data ensures that when a certain blockchain fails, it is guaranteed that data can be written in another blockchain.

Further, it also includes:

The blockchain algorithm corresponding to the two data block chains that are mutually backed up is different from the communication channel;

The blockchain algorithm corresponding to the two hash block chains that are mutually backed up is different from the communication channel.

The beneficial effect of using the above further solution is to ensure that when a blockchain algorithm or a communication channel of a certain blockchain has a problem, another blockchain algorithm or another blockchain of the communication channel is used. It works fine.

Further, it also includes:

When one of the data blockchains fails, the data in the unexpired data blockchain is backed up to a new blockchain, and the new blockchain is used as a new data blockchain;

Calculating a hash value corresponding to each data block in the new data block chain, and then verifying whether the hash value is the same as the hash value in the hash block chain. If they are different, the backup is performed again until the same.

The beneficial effect of using the above further solution is: when there is a problem in the data block chain, back up a new blockchain to become a new data blockchain, and use the hash value after the backup to verify whether the backup data is correct and avoid the backup. The process was intercepted and tampered with.

Further, it also includes:

When one of the hash blockchains fails, the hash value in the unfailed hash block chain is backed up to a new blockchain, and the new blockchain is used as a new hash blockchain;

Verify that the hash value in the new hash blockchain is the same as the hash value in the non-failed hash blockchain. If they are different, back up again until the same.

The beneficial effect of using the above further solution is: when there is a problem with a hash blockchain, back up a new blockchain to become a new hash blockchain, and use the hash value after the backup to verify whether the backup data is correct and avoid the backup. The process was intercepted and tampered with.

According to another aspect of the present invention, a blockchain based data loop writing system is provided, comprising:

a determining unit, configured to determine whether a preset cyclic write trigger condition is met before writing a new data block to the data blockchain;

a data writing unit, configured to overwrite the original data block in the data blockchain if the cyclic write condition is satisfied, or directly write a new data block, instead of The data block is overwritten.

Advantageous Effects of Invention: The present invention provides a blockchain-based data loop writing system capable of determining whether data already stored in a blockchain database satisfies a preset before writing new data in a blockchain. Trigger conditions, and when the preset conditions are met, new data is written to overwrite the original data, and the volume of the blockchain can be effectively controlled while destroying useless data. The invention stores data into the blockchain database, ensures that the data is not falsified, stores the security, and adopts the method of cyclic writing to effectively control the volume of the blockchain database, and the data satisfying the preset trigger condition will not be It is displayed in the blockchain system and is destroyed by new data coverage. It has better privacy and confidentiality, is safe and convenient, and has strong practicability.

Further, the method further includes: a Hash write unit, configured to write a hash value generated by the new data block into the hash block chain when the new data block is written into the data block chain;

If the cyclic write condition is satisfied, the hash value generated by the new data block is written in the hash block chain and the hash value generated by the original data block is overwritten; otherwise, the hash value generated by the new data block is directly written. , does not overwrite the hash value generated by the original data block.

Further, it also includes:

a downloading verification unit, configured to download data in the data blockchain, and verify whether a hash value generated by each data block in the downloaded data is the same as a hash value of a corresponding data block in the hash blockchain If the same, verify that the downloaded data has not been intercepted and falsified. If it is different, download again until the verification is the same.

Further, it also includes:

a data backup unit for backing up data in an unfailed data block chain to a new blockchain when one of the data blockchains fails, and using the new blockchain as a new data block chain;

a calculation verification unit, configured to calculate a hash value corresponding to each data block in the new data blockchain, and then verify whether the hash value is the same as a hash value in the hash blockchain, and if not, go to The data backup unit is until the verification is the same.

Further, it also includes:

The Hash backup unit is configured to back up the hash value in the un-failed hash block chain to a new blockchain when the hash block chain fails, and use the new blockchain as a new hash zone. Blockchain

The verification unit is configured to verify whether the hash value in the new hash block chain is the same as the hash value in the non-failed hash block chain, and if not, go to the hash backup unit until the verification is the same.

DRAWINGS

1 is a flowchart of a method for writing a data loop based on a blockchain according to Embodiment 1 of the present invention;

2 is a schematic diagram of a data loop writing system based on a blockchain according to a second embodiment of the present invention.

detailed description

The principles and features of the present invention are described below in conjunction with the accompanying drawings. The invention is not intended to limit the scope of the invention.

Embodiment 1 A data loop writing method based on a blockchain. The method provided in this embodiment will be described in detail below with reference to FIG. 1.

Referring to FIG. 1, S101 determines whether a preset cyclic write trigger condition is satisfied before writing a new data block to the data blockchain.

Specifically, before the new data is written in the blockchain data, it is determined whether the original data in the blockchain database satisfies a preset trigger condition, where the trigger condition specifically includes a time trigger condition and a blockchain database. Storage capacity trigger condition or specific event trigger condition.

Specifically, if the original data in the blockchain database satisfies a preset trigger condition, such as meeting a time trigger condition or a capacity trigger condition or a specific event trigger condition, when a new data is written, a cyclic write method is used to cover The data that has been written is destroyed, and the original data is destroyed by the new data. When the original data is overwritten, the data that covers the time is generally covered first; if the preset trigger condition is not met, the area is directly in the area. New data is written in the blockchain database and does not overwrite the original data.

For example, audio and video information collected by an existing law enforcement recorder or other authentication device is generally not stored in a blockchain, so there is a possibility that it may be maliciously edited later, and the content stored in the blockchain database is stored. There is no possibility of being tampered with. Before writing new data to the blockchain database in the law enforcement recorder, it is first necessary to determine whether the recording time of the data stored in the blockchain in the law enforcement recorder exceeds a preset time period, or in the law enforcement recorder. Whether the stored data capacity exceeds the preset storage capacity. If the recording time exceeds the preset time limit, or the data capacity exceeds the preset storage capacity, when the new data is written, the already stored data is overwritten in time sequence, and the data that is too long will be First covered; if the recording time does not exceed When the preset time limit is described, and the data capacity does not exceed the preset storage capacity, the new data is directly written without overwriting the original data. Specifically, for example, the storage capacity is used as a judgment condition. If the storage capacity of the law enforcement recorder is 16G, assuming that each piece of audio and video is 10M, 1600 segments of small video can be continuously recorded. When the 16G storage is full, the earliest time begins. cover.

For example, for the credit reporting institution, before writing new data to the blockchain database of the credit reporting agency, it is judged whether the credit record of the user recorded in the blockchain database has a bad record, and the bad record specifically refers to the user's default. Repayment, failure to deliver goods on time, failure to perform contracts, failure to perform contracts, failure to perform contracts.

Specifically, if no bad record occurs, the user writes a new credit record in a predetermined cycle time. Specifically, the blockchain database only records the latest set time, such as the personal credit record of the last three years. And identified as excellent, the blockchain database continuously circulates over three years of personal credit records.

In the event of a bad record, the bad credit record is kept. Specifically, when the user starts to return the arrears, the blockchain database keeps the bad credit record for five years. After five years, the loop coverage begins and is written. The user's new credit history overwrites the bad credit history. Credit information can also set its own trigger and loop conditions as required.

For example, for some confidential data, it only needs to be displayed in a specific time according to the relevant requirements. After reaching the set time, it needs to be destroyed, but the information is guaranteed to be safe and reliable during the retention period. The use of blockchain databases to store confidential data ensures that confidential data is not tampered with.

Specifically, if the confidential data stored in the blockchain database does not reach the time limit, the reservation is continued, and if the time limit is reached, directly writing the new other information will overwrite the confidential data.

In addition, the confidential data stored in the blockchain database can be encrypted and then stored in the blockchain database for viewing by relevant personnel.

You can also save the general data in the blockchain data and set the save time limit as well. General data that has been saved for a period of time can be cyclically covered according to a predetermined trigger condition.

In addition, the contents of the blockchain database can be cyclically written as required, such as periodically cyclically written. For example, the permissions of some high-level security systems should periodically clean up and rewrite authorization information. Trusted and secure problems can be solved with a circular, blockable blockchain database.

The solution provided by this embodiment further includes: when writing a new data block into the data block chain, the hash value generated by the new data block is also written into the hash block chain. Specifically, if the cyclic write condition is met, the hash value generated by the new data block is written in the hash block chain and the hash value generated by the original data block is overwritten, otherwise the new data block is directly written. The hash value does not override the hash value generated by the original data block. Specifically, the data block is calculated by using a predetermined algorithm to obtain a hash value corresponding to the data block.

When downloading the data in the data blockchain, in order to ensure the authenticity of the downloaded data, each data block in the downloaded data may be verified after downloading the data in the data blockchain. Whether the generated hash value is the same as the hash value of the corresponding data block in the hash block chain. If they are the same, the verified downloaded data is not intercepted and falsified. If different, the download is performed again until the verification is the same.

In addition, the data blockchain may be set to two, and the two data blockchains are backed up by each other; the hash blockchain is provided with two, and the two hash blockchains are mutually backed up. The blockchain algorithm corresponding to the two data blockchains that are mutually backed up is different from the communication channel. The blockchain algorithm corresponding to the two hash block chains that are mutually backed up is different from the communication channel.

When one of the data blockchains fails, the data in the unexpired data blockchain is backed up to a new blockchain, and the new blockchain is used as a new data blockchain; the new The hash value corresponding to each data block in the data block chain, and then verify whether the hash value is the same as the hash value in the hash block chain. If they are different, the backup is performed again until the same. The new data blockchain and the non-failed data blockchain are mutually backed up. The blockchain failure specifically means that the blockchain is not maintained by anyone, and data cannot be written to the inside, or the blockchain algorithm corresponding to the blockchain is broken. broken.

When one of the hash blockchains fails, the hash value in the un-failed hash block chain is backed up to a new blockchain, and the new blockchain is used as a new hash blockchain; Whether the hash value in the new hash blockchain is the same as the hash value in the un-failed hash blockchain. If they are different, the backup is repeated until the same. The new hash blockchain and the non-failed hash blockchain are mutually backed up.

Embodiment 2 A data chain writing system based on a blockchain. The system provided in this embodiment will be described in detail below with reference to FIG.

Referring to FIG. 2, the system provided in this embodiment includes a determining unit, a data writing unit, a Hash writing unit, a download verification unit, a data backup unit, a calculation verification unit, a Hash backup unit, and a verification unit.

The determining unit is configured to determine whether the preset cyclic write trigger condition is met before writing the new data block to the data blockchain.

The Hash write unit is configured to write a hash value generated by the new data block into the hash block chain when the new data block is written into the data block chain.

Specifically, the Hash write unit is configured to: if the cyclic write condition is met, write a hash value generated by the new data block in the hash block chain and overwrite the hash value generated by the original data block, otherwise directly The hash value generated by the new data block is written, and the hash value generated by the original data block is not overwritten.

a downloading verification unit, configured to download data in the data blockchain, and verify whether a hash value generated by each data block in the downloaded data is the same as a hash value of a corresponding data block in the hash blockchain If the same, verify that the downloaded data has not been intercepted and falsified, if different, then Download again until the verification is the same.

a data backup unit for backing up data in an unfailed data block chain to a new blockchain when one of the data blockchains fails, and using the new blockchain as a new data block chain.

The Hash backup unit is configured to back up the hash value in the un-failed hash block chain to a new blockchain when the hash block chain fails, and use the new blockchain as a new hash zone. Blockchain.

The invention provides a blockchain-based data loop writing method and system, which can determine whether the data already stored in the blockchain database satisfies a preset trigger condition before writing new data in the blockchain. And when the preset conditions are met, new data is written to overwrite the original data, and the volume of the blockchain can be effectively controlled while destroying useless data. In the present invention, the data stored in the blockchain database is not tampered with, the storage is safe, and the volume of the blockchain database is effectively controlled, and the data satisfying the preset trigger condition is no longer displayed in the blockchain system. It is destroyed by new data coverage, and it has better privacy and confidentiality. It can also verify whether the downloaded data is correct. In addition, it has a backup blockchain to ensure that when a blockchain fails to write data, The backup blockchain performs data writing, which is safe and convenient, and has strong practicability.

The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalents, improvements, etc., which are within the spirit and scope of the present invention, should be included in the protection of the present invention. Within the scope.

Claims

A method for writing a data loop based on a blockchain, the method comprising:

S101. Before writing a new data block to the data blockchain, determining whether a preset cyclic write trigger condition is met;

S102. If the cyclic write condition is met, the new data block to be written in the data block chain overwrites the original data block, otherwise the new data block is directly written, and the original data block is not overwritten. .
The blockchain-based data cyclic writing method according to claim 1, wherein the cyclic write triggering condition in the S101 specifically includes a time triggering condition and a storage capacity triggering condition of the data blockchain. Or an event trigger condition.
The blockchain-based data loop writing method according to claim 2, further comprising:

When a new data block is written into the data block chain, the hash value generated by the new data block is also written into the hash block chain;

If the cyclic write condition is satisfied, the hash value generated by the new data block is written in the hash block chain and the hash value generated by the original data block is overwritten; otherwise, the hash value generated by the new data block is directly written. , does not overwrite the hash value generated by the original data block.
The blockchain-based data loop writing method according to claim 3, further comprising:

And downloading data in the data block chain, and verifying whether a hash value generated by each data block in the downloaded data is the same as a hash value of a corresponding data block in the hash block chain, and if the same, verifying The downloaded data has not been intercepted and falsified. If it is different, download again until the verification is the same.
A blockchain-based data loop writing method according to claim 4, characterized in that It also includes:

The data blockchain is provided with two, and the two data block chains are mutually backed up;

There are two hash block chains, and the two hash block chains are backups of each other.
The blockchain-based data loop writing method of claim 5, further comprising:

The blockchain algorithm corresponding to the two data block chains that are mutually backed up is different from the communication channel;

The blockchain algorithm corresponding to the two hash block chains that are mutually backed up is different from the communication channel.
A blockchain-based data loop writing method according to claim 6, further comprising:

When one of the data blockchains fails, the data in the unexpired data blockchain is backed up to a new blockchain, and the new blockchain is used as a new data blockchain;

Calculating a hash value corresponding to each data block in the new data block chain, and then verifying whether the hash value is the same as the hash value in the hash block chain. If they are different, the backup is performed again until the same.
A blockchain-based data loop writing method according to claim 7, further comprising:

When one of the hash blockchains fails, the hash value in the unfailed hash block chain is backed up to a new blockchain, and the new blockchain is used as a new hash blockchain;

Verify that the hash value in the new hash blockchain is the same as the hash value in the non-failed hash blockchain. If they are different, back up again until the same.
A blockchain-based data loop writing system, characterized in that the system comprises:

a determining unit, configured to determine whether a preset cyclic write trigger condition is met before writing a new data block to the data blockchain;

a data writing unit, configured to overwrite the original data block in the data blockchain if the cyclic write condition is satisfied, or directly write a new data block, instead of The data block is overwritten.
A blockchain-based data loop writing system according to claim 9, further comprising:

a Hash write unit, configured to: when writing a new data block into the data block chain, write a hash value generated by the new data block into the hash block chain;

If the cyclic write condition is satisfied, the hash value generated by the new data block is written in the hash block chain and the hash value generated by the original data block is overwritten; otherwise, the hash value generated by the new data block is directly written. , does not overwrite the hash value generated by the original data block.
A blockchain-based data loop writing system according to claim 10, further comprising:

a downloading verification unit, configured to download data in the data blockchain, and verify whether a hash value generated by each data block in the downloaded data is the same as a hash value of a corresponding data block in the hash blockchain If the same, verify that the downloaded data has not been intercepted and falsified. If it is different, download again until the verification is the same.
A blockchain-based data loop writing system according to claim 11, further comprising:

a data backup unit for backing up data in an unfailed data block chain to a new blockchain when one of the data blockchains fails, and using the new blockchain as a new data block chain;

a calculation verification unit, configured to calculate a hash value corresponding to each data block in the new data blockchain, and then verify whether the hash value is the same as a hash value in the hash blockchain, and if not, go to The data backup unit is until the verification is the same.
A blockchain-based data loop writing system according to claim 12 The levy also includes:

The Hash backup unit is configured to back up the hash value in the un-failed hash block chain to a new blockchain when the hash block chain fails, and use the new blockchain as a new hash zone. Blockchain

The verification unit is configured to verify whether the hash value in the new hash block chain is the same as the hash value in the non-failed hash block chain, and if not, go to the hash backup unit until the verification is the same.