WO2020134898A1

WO2020134898A1 - Hash information processing method and system for storage records in block of blockchain

Info

Publication number: WO2020134898A1
Application number: PCT/CN2019/122552
Authority: WO
Inventors: 栗志果
Original assignee: 阿里巴巴集团控股有限公司
Priority date: 2018-12-26
Filing date: 2019-12-03
Publication date: 2020-07-02
Also published as: CN110020544A; CN110020544B; TW202024951A

Abstract

A hash information processing method and system for storage records in a block of a blockchain, and an electronic device. The method comprises: obtaining hash information of a plurality of storage records in a block of a first blockchain account book (S110); performing at least one confusion encryption processing on the plurality of pieces of hash information to obtain at least one piece of target hash information (S120); and storing the at least one piece of target hash information in a second blockchain account book, wherein the target user has an authority to access the second blockchain account book but does not have an authority to access the first blockchain account book (S130).

Description

Hash information processing method and system for storing records in blocks of blockchain

Technical field

This application relates to the field of computer software technology, and in particular to a hash information processing method and system for storing records in blocks of a blockchain.

Background technique

The blockchain ledger has the characteristics of true transparency and irremovability, and its application range is getting wider and wider, basically involving various industries.

However, due to the architecture of the blockchain ledger, even if the plaintext is encrypted and hashed, the public can still obtain the real transaction volume on the blockchain by parsing the blockchain ledger.

While ensuring the authenticity and transparency of the data, how to protect the transaction scale and transaction level of the business is an urgent technical problem to be solved.

Summary of the invention

The purpose of the embodiments of the present application is to provide a method and system for processing hash information stored in a block of a blockchain to protect the transaction scale and transaction level of the business in the blockchain, so that more businesses can Use blockchain technology to better protect business data.

To solve the above technical problems, the embodiments of the present application are implemented as follows:

In the first aspect, a hash information processing method for storing records in blocks of a blockchain is proposed. The method includes:

Obtain the hash information of multiple storage records in the block of the first blockchain ledger;

Performing at least one layer of obfuscation and encryption processing on the plurality of hash information to obtain at least one target hash information;

The at least one target hash information is stored in the second blockchain ledger, where the target user has permission to access the second blockchain ledger and does not have permission to access the first blockchain ledger.

In the second aspect, a blockchain system is proposed. The blockchain system includes:

The obtaining module obtains hash information of multiple storage records in the block of the first blockchain ledger;

A confusion encryption processing module, performing at least one layer of confusion encryption processing on the plurality of hash information to obtain at least one target hash information;

The storage module stores the at least one target hash information in the second blockchain ledger, where the target user has the authority to access the second blockchain ledger and does not have the authority to access the first blockchain ledger.

In a third aspect, an electronic device is proposed. The electronic device includes:

Processor; and

A memory arranged to store computer-executable instructions, which when executed, causes the processor to perform the following operations:

Obtain hash information of multiple storage records in the block of the first blockchain ledger; perform at least one layer of obfuscation and encryption processing on the multiple hash information to obtain at least one target hash information; convert the at least one target The hash information is stored in the second blockchain ledger, where the target user has permission to access the second blockchain ledger and does not have permission to access the first blockchain ledger.

In a fourth aspect, a computer-readable storage medium is proposed, which stores one or more programs, which when executed by an electronic device including multiple application programs, causes all The electronic device performs the following operations:

BRIEF DESCRIPTION

In order to more clearly explain the technical solutions in the embodiments of the present application, the drawings required in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some implementations described in the present application For example, for those of ordinary skill in the art, without paying any creative work, other drawings can be obtained based on these drawings.

FIG. 1 is a flowchart of a hash information processing method for storing records in a block of a blockchain according to an embodiment of the present application.

2 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

FIG. 3 is a schematic structural diagram of a blockchain system according to an embodiment of the present application.

detailed description

Embodiments of the present application provide a hash information processing method, system, and electronic device for storing records in blocks of a blockchain.

In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be described clearly and completely in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the scope of protection of this application.

FIG. 1 is a flowchart of a hash information processing method for storing records in a block of a blockchain according to an embodiment of the present application. The method of FIG. 1 may include:

S110: Obtain hash information of multiple storage records in a block of the first blockchain ledger.

It should be understood that in different blockchain application scenarios, the storage records in the blockchain can store different contents. For example, in a system involving blockchain transactions, a storage record is a transaction record of the blockchain.

It should be understood that, in the embodiment of the present application, when acquiring hash information of a plurality of stored records in a block of the first blockchain ledger, the hash information of the plurality of stored records may be obtained through the transaction tree of the block.

It should be understood that in a blockchain system such as Bitcoin 1.0, there is only one Merkle tree. To a certain extent, this tree can also be called a transaction tree; and in areas such as Ethereum In the blockchain system of Blockchain 2.0, there are three Merkle trees: Transaction tree, Receipt tree, and State tree.

Optionally, as an embodiment, step S110 may be implemented as follows: block-by-block acquisition of hash information of multiple storage records in the block of the first blockchain ledger for obfuscation and encryption processing until the block is read The latest block of the chain.

For this embodiment, the history block information of the blockchain can be obfuscated and encrypted according to the solution of the embodiment of the present application.

Or, optionally, as another embodiment, step S110 may be implemented as: in response to a storage event of the latest block of the first blockchain ledger, acquire hash information of multiple storage records in the latest block.

For this embodiment, the solution of the embodiment of the present application needs to be executed when the blockchain to which the first blockchain ledger belongs is started to ensure that the storage records of all blocks of the first blockchain ledger are confused. Hope information can be queried in the second blockchain ledger. Of course, if there is no need to query the hash information of the storage records of all the blocks in the first blockchain ledger, the execution time of the method of the embodiment of the present application may not be limited.

S120: Perform at least one layer of obfuscation and encryption processing on the multiple hash information to obtain at least one target hash information.

In the embodiment of the present application, by obfuscating and encrypting the hash information of the storage records of the blocks, it is possible to avoid leaking the transaction volume information of the blocks in the blockchain.

In particular, the number of the at least one target hash information is not equal to the number of the plurality of hash information.

S130: Store the at least one target hash information in the second blockchain ledger, where the target user has permission to access the second blockchain ledger and does not have permission to access the first blockchain ledger.

In the embodiment of the present application, the hash information of the storage records of the blocks in the first blockchain ledger is obfuscated and encrypted to be stored in the second blockchain ledger accessible by the target user, thereby avoiding direct access by the target user The disclosure of information such as transaction scale and transaction volume level brought by the first blockchain ledger ensures the information security of the blockchain system to which the first blockchain ledger belongs.

It should be understood that the target user has the right to access the second blockchain ledger and does not have the right to access the first blockchain ledger, and there are multiple ways to implement it:

For example, the blockchain where the first blockchain ledger is located is a private chain; the blockchain where the second blockchain ledger is located. At this time, nodes other than the account node of the blockchain where the first blockchain ledger is located will not have access rights to the first blockchain ledger, but can access the second blockchain ledger.

For another example, the blockchain where the first blockchain ledger is located and the blockchain where the second blockchain ledger is located are private chains, and the target account is configured with access rights for the second blockchain ledger, but No access rights are configured for the first blockchain ledger.

It should be understood that, in the embodiments of the present application, the obfuscation and encryption processing of the hash information may include multiple manners.

Optionally, in an implementation manner, content composed of multiple hash information may be hashed to obtain one hash information.

For example, if the hash information corresponding to 4 storage records in a block of the blockchain is HashA, HashB, HashC and HashD, then the hash information after the encryption process is obfuscated HashABCD=Hash(HashA+HashB+HashC +HashD), where the function Hash() represents a hash calculation function, such as MD5, SHA-1, SHA-256, SHA-384, SHA-512, and so on. In the Bitcoin system, the hash algorithm used is SHA-256.

Optionally, in another implementation manner, the content of any one of the hash information may be divided into multiple parts, and then the hash calculation may be separately performed to obtain multiple pieces of hash information corresponding to the content of the multiple parts.

For example, assuming that the hash information corresponding to a storage record in a block of the blockchain is HashA, HashA can be split into HashA1 and HashA2, and then hashed separately, that is, HashA1'=Hash(HashA1) , HashA2'=Hash(HashA2), at this time, HashA1' and HashA2' are hash information obtained by obfuscating and encrypting HashA. Of course, you can also split HashA into 3 parts, 4 parts, or even more parts. How many parts you want to split and how to split them is configurable.

Optionally, in another implementation manner, the content composed of multiple hash information may be further divided into multiple parts of content, and the content of each part is separately hashed to obtain the multiple parts of the Multiple hash information corresponding to the content.

For example, suppose that the hash information corresponding to the 4 storage records in a block of the blockchain are HashA, HashB, HashC, and HashD. The content of its composition HashABCD=(HashA+HashB+HashC+HashD); HashABCD is divided into HashABCD1 and HashABCD2, and then hash calculation of HashABCD1 and HashABCD2 respectively to obtain Hash(HashABCD1) and Hash(HashABCD2), Hash(HashABCD1) and Hash(HashABCD2) are multiple hash corresponding to the content of the multiple parts information.

Of course, only a few are listed above, and there may be other processing methods, which are not limited.

In addition, it should be understood that the obfuscation scheme of the embodiment of the present application may also perform multi-layer obfuscation encryption processing, that is, to perform one or more layers of obfuscation encryption processing on the hash information after one layer of confusion encryption processing. The algorithms for obfuscation and encryption at different layers can be the same or different.

For example, for example, if the hash information corresponding to 4 storage records in a block of the blockchain is HashA, HashB, HashC and HashD, then the hash information HashABCD=Hash( HashA+HashB+HashC+HashD); the hash information after the second layer of obfuscation encryption processing is Hash(HashABCD1) and Hash(HashABCD2), where HashABCD=HashABCD1+HashABCD2.

Optionally, as an embodiment, the at least one target hash information is M roots of the transaction tree of the block. That is, referring to the generation method of the Merkle tree, hash the storage records in the block to obtain hash information, and then hash the hash information two by two to obtain new hash information until a hash value is obtained.

Optionally, as an embodiment, step S130 may be specifically implemented as:

Store the unique identifier of the block and the at least one target hash information into the second blockchain ledger.

In the embodiment of the present application, the unique identifier of the block is stored in the second blockchain ledger together with the generated at least one target hash information, so that the target user can determine the at least one target based on the unique identifier of the block Hope which block the information belongs to.

Further, in a specific implementation manner of the embodiment of the present application, the unique identifier of the block and the at least one target hash information may be stored in the second blockchain ledger as a storage record.

In the embodiment of the present application, all obfuscated hash information of a block is stored as a storage record.

Or, further, in another specific implementation manner of the embodiment of the present application, the unique identifier of the block and the target hash information may be stored in the second blockchain ledger as a storage record.

In the embodiment of the present application, the hash information of one block after being obfuscated is stored as a storage record.

Or, further, in another specific implementation manner of the embodiment of the present application, the unique identifier of the block and no more than a predetermined number of target hash information may be stored as a storage record in the second block In the chain account book.

Of course, it should be understood that in the above implementation of the embodiments of the present application, the storage record may also carry at least one piece of information in the block header of the block, such as the hash information of the parent block, the area Block timestamp information, etc.

Optionally, as an embodiment, the method further includes:

The code of the obfuscation algorithm is stored in the third blockchain ledger, and the obfuscation algorithm is used to perform at least one layer of obfuscation encryption processing on the plurality of hash information to obtain the at least one target hash information.

Optionally, as an embodiment, the method is implemented by calling a smart contract of the blockchain where the first blockchain ledger is located.

Of course, it should be understood that the method may be implemented by a third-party device other than the blockchain where the first blockchain ledger is located, which is not limited in the embodiments of the present application.

The foregoing describes specific embodiments of the present specification. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims can be performed in a different order than in the embodiments and still achieve the desired results. Additionally, the processes depicted in the drawings do not necessarily require the particular order shown or sequential order to achieve the desired results. In certain embodiments, multitasking and parallel processing are also possible or may be advantageous.

2 is a schematic structural diagram of an electronic device according to an embodiment of the present application. Please refer to FIG. 2. At the hardware level, the electronic device includes a processor, and optionally also includes an internal bus, a network interface, and a memory. The memory may include a memory, such as a high-speed random access memory (Random-Access Memory, RAM), or may also include a non-volatile memory (non-volatile memory), such as at least one disk memory. Of course, the electronic device may also include hardware required for other services.

The processor, network interface and memory can be connected to each other through an internal bus, which can be an ISA (Industry Standard Architecture, Industry Standard Architecture) bus, a PCI (Peripheral Component Interconnect) bus, or an EISA (Extended Industry, Standard Architecture, extended industry standard structure) bus, etc. The bus can be divided into an address bus, a data bus, and a control bus. For ease of representation, only one bidirectional arrow is used in FIG. 2, but it does not mean that there is only one bus or one type of bus.

Memory for storing programs. Specifically, the program may include program code, and the program code includes a computer operation instruction. The memory may include memory and non-volatile memory, and provide instructions and data to the processor.

The processor reads the corresponding computer program from the non-volatile memory into the memory and then runs it, forming a blockchain system at a logical level. The processor executes the programs stored in the memory and is specifically used to perform the following operations:

The method executed by the blockchain system disclosed in the embodiment shown in FIG. 1 of the present application may be applied to a processor, or implemented by a processor. The processor may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method may be completed by an integrated logic circuit of hardware in the processor or instructions in the form of software. The aforementioned processor may be a general-purpose processor, including a central processor (Central Processing Unit, CPU), a network processor (Network Processor, NP), etc.; it may also be a digital signal processor (Digital Signal Processor, DSP), dedicated integration Circuit (Application Specific Integrated Circuit, ASIC), field programmable gate array (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps, and logical block diagrams disclosed in the embodiments of the present application may be implemented or executed. The general-purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in conjunction with the embodiments of the present application may be directly embodied and executed by a hardware decoding processor, or may be executed and completed by a combination of hardware and software modules in the decoding processor. The software module may be located in a random storage memory, a flash memory, a read-only memory, a programmable read-only memory, or an electrically erasable programmable memory, a register, and other mature storage media in the art. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

The electronic device may also execute the method of FIG. 1 and implement the function of the block chain system in the embodiment shown in FIG. 1, which will not be described in detail in the embodiments of the present application.

Of course, in addition to the software implementation, the electronic device of the present application does not exclude other implementations, such as a logic device or a combination of software and hardware, etc., that is to say, the execution body of the following processing flow is not limited to each logical unit, It can also be a hardware or logic device.

Embodiments of the present application also provide a computer-readable storage medium that stores one or more programs, the one or more programs include instructions, and the instructions are included in a portable electronic device that includes multiple application programs When executed, the portable electronic device can execute the method of the embodiment shown in FIG. 1 and is specifically used to perform the following operations:

FIG. 3 is a schematic structural diagram of a blockchain system 300 according to an embodiment of the present application. Referring to FIG. 3, in a software implementation, the blockchain system 300 may include:

The obtaining module 310 obtains hash information of multiple storage records in the block of the first blockchain ledger;

The confusion encryption processing module 320 performs at least one layer of confusion encryption processing on the plurality of hash information to obtain at least one target hash information;

The storage module 330 stores the at least one target hash information in the second blockchain ledger, where the target user has permission to access the second blockchain ledger and does not have permission to access the first blockchain ledger.

Optionally, the obtaining module 310 may be specifically used for:

In response to the storage event of the latest block of the first blockchain ledger, the hash information of multiple storage records in the latest block is obtained.

Optionally, the blockchain where the first blockchain ledger is located is a private chain, and the blockchain where the second blockchain ledger is located is a public chain.

Or, optionally, the blockchain where the first blockchain ledger is located is a private chain, and the blockchain where the second blockchain ledger is located is a private chain.

Optionally, the layer of obfuscation encryption processing includes one of the following:

Hash the content composed of multiple hash information to obtain one hash information;

Divide any one piece of hash information into multiple parts and then perform hash calculation to obtain multiple pieces of hash information corresponding to the contents of the multiple parts;

The content composed of multiple pieces of hash information is further divided into multiple parts of content, and the content of each part is separately hashed to obtain multiple pieces of hash information corresponding to the contents of the multiple parts.

Optionally, the at least one target hash information is the M root of the transaction tree of the block.

Optionally, as an embodiment, the storage module 330 is specifically used to:

Storing the at least one target hash information in the second blockchain ledger includes:

Further, in an implementation manner of this embodiment, the storage module 330 is specifically used for:

The unique identifier of the block and the at least one target hash information are stored in the second blockchain ledger as a storage record.

Or, further, in another implementation manner of this embodiment, the storage module 330 is specifically configured to:

The unique identifier of the block and one target hash information are stored in the second blockchain ledger as a storage record.

Or, further, in yet another implementation manner of this embodiment, the storage module 330 is specifically used for:

The unique identifier of the block and no more than a predetermined number of target hash information are stored as storage records in the second blockchain ledger.

Furthermore, in the above specific implementation manner, the storage record may also carry at least one piece of information in the block header of the block.

Optionally, the storage module 330 may also be used for:

Optionally, the number of the at least one target hash information is not equal to the number of the plurality of hash information.

The blockchain system 300 can also execute the method of the embodiment shown in FIG. 1. For specific implementation, reference may be made to the embodiment shown in FIG.

In short, the above are only the preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of this application shall be included in the scope of protection of this application.

The system, device, module or unit explained in the above embodiments may be specifically implemented by a computer chip or entity, or implemented by a product having a certain function. A typical implementation device is a computer. Specifically, the computer may be, for example, a personal computer, a laptop computer, a cellular phone, a camera phone, a smart phone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or A combination of any of these devices.

Computer readable media, including permanent and non-permanent, removable and non-removable media, can store information by any method or technology. The information may be computer readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, read-only compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, Magnetic tape cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission media can be used to store information that can be accessed by computing devices. As defined in this article, computer-readable media does not include temporary computer-readable media (transitory media), such as modulated data signals and carrier waves.

It should also be noted that the terms "include", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device that includes a series of elements not only includes those elements, but also includes Other elements not explicitly listed, or include elements inherent to such processes, methods, goods, or equipment. Without more restrictions, the element defined by the sentence "include one..." does not exclude that there are other identical elements in the process, method, commodity or equipment that includes the element.

The embodiments in this specification are described in a progressive manner. The same or similar parts between the embodiments can be referred to each other. Each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant part can be referred to the description of the method embodiment.

Claims

A hash information processing method for storing records in blocks of a blockchain, including:

Obtain the hash information of multiple storage records in the block of the first blockchain ledger;

Performing at least one layer of obfuscation and encryption processing on the plurality of hash information to obtain at least one target hash information;

The at least one target hash information is stored in the second blockchain ledger, where the target user has permission to access the second blockchain ledger and does not have permission to access the first blockchain ledger.
The method of claim 1,

The blockchain where the first blockchain ledger is located is a private chain, and the blockchain where the second blockchain ledger is located is a public chain; or

The blockchain where the first blockchain ledger is located and the blockchain where the second blockchain ledger is located are both private chains.
The method of claim 1, one layer of the obfuscation encryption process includes one of the following:

Hash the content composed of multiple hash information to obtain one hash information;

Divide any one piece of hash information into multiple parts and then perform hash calculation to obtain multiple pieces of hash information corresponding to the contents of the multiple parts;

The content composed of multiple pieces of hash information is further divided into multiple parts of content, and the content of each part is separately hashed to obtain multiple pieces of hash information corresponding to the contents of the multiple parts.
The method of claim 1,

The at least one target hash information is the M root of the transaction tree of the block.
The method of claim 1,

Storing the at least one target hash information in the second blockchain ledger includes:

Store the unique identifier of the block and the at least one target hash information into the second blockchain ledger.
The method of claim 5,

The unique identifier of the block and the at least one target hash information are stored in the second blockchain ledger, including:

The unique identifier of the block and the at least one target hash information are stored in the second blockchain ledger as a storage record.
The method of claim 5,

The unique identifier of the block and the at least one target hash information are stored in the second blockchain ledger, including:

The unique identifier of the block and one target hash information are stored in the second blockchain ledger as a storage record.
The method of claim 5,

The unique identifier of the block and the at least one target hash information are stored in the second blockchain ledger, including:

The unique identifier of the block and no more than a predetermined number of target hash information are stored as storage records in the second blockchain ledger.
The method according to any one of claims 6-8, wherein the storage record further carries at least one piece of information in a block header of the block.
The method of claim 1, further comprising:

The code of the obfuscation algorithm is stored in the third blockchain ledger, and the obfuscation algorithm is used to perform at least one layer of obfuscation encryption processing on the plurality of hash information to obtain the at least one target hash information.
The method of claim 1, the method is implemented by calling a smart contract of the blockchain where the first blockchain ledger is located.
The method of claim 1,

The number of the at least one target hash information is not equal to the number of the plurality of hash information.
The method of claim 1,

Obtain the hash information of multiple storage records in the block of the first blockchain ledger, including:

In response to the storage event of the latest block of the first blockchain ledger, the hash information of multiple storage records in the latest block is obtained.
A blockchain system, including:

The obtaining module obtains hash information of multiple storage records in the block of the first blockchain ledger;

A confusion encryption processing module, performing at least one layer of confusion encryption processing on the plurality of hash information to obtain at least one target hash information;

The storage module stores the at least one target hash information in the second blockchain ledger, where the target user has the authority to access the second blockchain ledger and does not have the authority to access the first blockchain ledger.
An electronic device, including:

Processor; and

A memory arranged to store computer-executable instructions, which when executed, causes the processor to perform the following operations:

Obtain the hash information of multiple storage records in the block of the first blockchain ledger;

Performing at least one layer of obfuscation and encryption processing on the plurality of hash information to obtain at least one target hash information;

The at least one target hash information is stored in the second blockchain ledger, where the target user has permission to access the second blockchain ledger and does not have permission to access the first blockchain ledger.
A computer-readable storage medium storing one or more programs, which when executed by an electronic device including multiple application programs, causes the electronic device to perform the following operations :

Obtain the hash information of multiple storage records in the block of the first blockchain ledger;

Performing at least one layer of obfuscation and encryption processing on the plurality of hash information to obtain at least one target hash information;

The at least one target hash information is stored in the second blockchain ledger, where the target user has permission to access the second blockchain ledger and does not have permission to access the first blockchain ledger.