WO2019127531A1

WO2019127531A1 - Block chain-based data processing method and apparatus, storage medium and electronic device

Info

Publication number: WO2019127531A1
Application number: PCT/CN2017/120264
Authority: WO
Inventors: 王健; 谢辉; 张跃洋; 陈敏; 周阳; 庞洪福; 薛鹏飞
Original assignee: 深圳前海达闼云端智能科技有限公司
Priority date: 2017-12-29
Filing date: 2017-12-29
Publication date: 2019-07-04
Also published as: CN108235772A; CN108235772B

Abstract

The present invention provides a block chain-based data processing method and apparatus, a storage medium and an electronic device for protecting private transaction of a block chain node. The method comprises: receiving a block in a block chain network, the block comprising a sub-block, and the sub-block comprising a smart contract code and data corresponding to the smart contract code; obtaining a secret key from a digital envelope of a management contract by means of a pre-obtained private key; obtaining the smart contract code in the sub-block according to the secret key, so that a first block chain node executes the smart contract code; encrypting and writing the smart contract code and data generated when the first block chain node executes the smart contract code into the sub-block; and writing the sub-block into a block of the first block chain node.

Description

Data processing method, device, storage medium and electronic device based on blockchain

Technical field

The present disclosure relates to the field of computers, and in particular, to a data processing method, apparatus, storage medium, and electronic device based on a blockchain.

Background technique

Blockchain technology is a distributed, decentralized, trusted network data consensus storage technology based on a unique block generation mechanism and P2P (Point To Point (point-to-point) network communication mechanism realizes the synchronization problem of distributed computing.

For the traditional public blockchain, the transaction information of any blockchain node is public, and any blockchain node can view the transaction information of other blockchain nodes. However, in some application areas, the transaction information of the blockchain node may include private information, and it is necessary to avoid providing clear text to each participating node. However, if the node has no data plaintext, the node will not be able to verify the validity of the data, and finally cannot achieve the protection chain. The purpose of the data.

Therefore, the traditional public blockchain cannot better protect private transactions.

Summary of the invention

In view of this, the present disclosure provides a blockchain-based data processing method, apparatus, storage medium, and electronic device for protecting a privacy transaction of a blockchain node.

In order to achieve the above object, according to a first aspect of an embodiment of the present disclosure, a block chain-based data processing method is provided, the method being applied to a first block chain node in a blockchain network, the blockchain Deploying a management contract, the management contract defining a trusted node capable of executing a smart contract, the trusted node including at least the first blockchain node;

The method includes:

Receiving a block in the blockchain network; the block includes a sub-block, the sub-block including a smart contract code and data corresponding to the smart contract code;

Obtaining a secret key from a digital envelope of the management contract by a pre-acquired private key;

Obtaining the smart contract code in the sub-block according to the secret key, so that the first blockchain node executes the smart contract code;

Encrypting the smart contract code and the data generated by the first blockchain node to execute the smart contract code into a sub-block;

The sub-block is written into a block of the first block chain node.

According to a second aspect of an embodiment of the present disclosure, there is provided an apparatus for securely accessing a blockchain, configured in a first blockchain node in a blockchain network, the blockchain network deploying a management contract, the management contract Defining a trusted node capable of executing a smart contract, the trusted node including at least the first blockchain node;

The device includes:

a receiving module, configured to receive a block in the blockchain network; the block includes a sub-block, where the sub-block includes a smart contract code and data corresponding to the smart contract code;

An obtaining module configured to obtain a secret key from a digital envelope of the smart contract by using a pre-acquired private key;

a decryption module configured to acquire the smart contract code in the sub-block according to the secret key, so that the first blockchain node executes the smart contract code;

a first write module configured to encrypt and write data generated by the smart contract code and the first blockchain node to the smart contract code into a sub-block;

A second write module is configured to write the sub-block into a block of the first block chain node.

According to a third aspect of an embodiment of the present disclosure, a computer readable storage medium for storing a computer program, the computer program comprising instructions for performing the method of the first aspect.

A fourth aspect of the present disclosure provides an electronic device comprising: the computer readable storage medium of the third aspect; and one or more processors for executing a program in the computer readable storage medium.

Through the above technical solution of the present disclosure, by deploying a management contract, the management contract may define a trusted node capable of executing a smart contract with a private transaction, that is, an object of the private transaction may be defined by the management contract, and only the object of the private transaction can Obtaining a secret key from a digital envelope of the management contract by a pre-acquired private key, and decrypting the encrypted private transaction in the sub-block by the obtained secret key, and since the sub-block is only an independent part of the block, It does not affect the validity of other data in other nodes to verify the block, and the validity of the sub-block data can only be verified by the object of the private transaction (ie, the node). Thus, the protection of privacy transactions is achieved using the above method.

The above general description and the following detailed description are intended to be illustrative and not restrictive.

DRAWINGS

FIG. 1 is a schematic diagram of an implementation environment, according to an exemplary embodiment of the present disclosure.

FIG. 2 is a schematic flowchart diagram of a blockchain-based data processing method according to an exemplary embodiment of the present disclosure.

FIG. 3 is a schematic flowchart of encryption in a blockchain-based data processing method according to an exemplary embodiment of the present disclosure.

FIG. 4 is a schematic flowchart of a sub-block write block in a block chain-based data processing method according to an exemplary embodiment of the present disclosure.

FIG. 5 is a block diagram of a blockchain-based data processing apparatus according to an exemplary embodiment of the present disclosure.

FIG. 6 is a block diagram of a first write module of a blockchain-based data processing apparatus according to an exemplary embodiment of the present disclosure.

FIG. 7 is a block diagram of a second write module of a blockchain-based data processing apparatus according to an exemplary embodiment of the present disclosure.

FIG. 8 is a block diagram of an electronic device, according to an exemplary embodiment.

Detailed ways

Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. The following description refers to the same or similar elements in the different figures unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with aspects of the present disclosure as detailed in the appended claims.

Before introducing the blockchain-based data processing method, device and storage medium provided by the present disclosure, a blockchain network is briefly introduced. A blockchain is a decentralized distributed database system in which all nodes in a blockchain network participate in maintenance. It is composed of a series of data blocks generated by cryptography, and each block is a blockchain. One block. According to the order of the generation time, the blocks are linked together in an orderly manner to form a data chain, which is aptly called a blockchain. Some concepts of the blockchain network are introduced below.

A node in a blockchain network may be referred to as a blockchain node, where the blockchain network is based on P2P (Peer) To Peer (peer-to-peer network) network, each P2P network node participating in transaction and block storage, verification, and forwarding is a node in a blockchain network.

The user identity in the blockchain can be represented by a public key or an account address generated based on the public key, and the public key and the private key appear in pairs, wherein the private key is mastered by the user and not posted to the blockchain described above. In the network, the public key or the above account address can be freely posted in the blockchain network. Among them, the public key can be the above account address through a specific hash and encoding. It is worth mentioning that there is no one-to-one correspondence between user identity and blockchain nodes. Users can use their own private key on any blockchain node.

In the usual sense, in the formation of the blockchain, each node participating in the calculation has the same authority (decentralized, no trust), including transactions, calculation blocks (commonly known as mining, ie mining) And other core functions. Among them, the transaction representative will be written into the block data, and the block (Block) adopts a specific generation mechanism to ensure that the longest chain (the longest chain contains the most relevant blocks) is the effective chain. In the data of the transaction, usually includes a certain attribute or currency, such as the digital signature of the transaction owner (ie, the owner's private key encrypts the transaction, usually called digital signature), the account address of the transaction recipient Etc., after the transaction passes the verification of the owner's digital signature and is written into the block, the ownership of the currency is transferred to the recipient.

The process of writing blocks to the data of the blockchain is performed by the blockchain node by writing a transaction to the blockchain network to write data to the blockchain. The transaction includes: the blockchain node performs a digital signature on the generated transaction data packet according to a preset transaction data format, and uses the private key of the blockchain node to perform the digital signature on the transaction data packet, and the digital signature is used to prove the The identity of the user of the blockchain node. The transaction is then recorded by the “miners” in the blockchain network (ie, the blockchain nodes that perform the PoW consensus competition mechanism) into the new blocks generated in the blockchain, and the transaction is posted to the blockchain network. The transaction is verified by other blockchain nodes (other nodes can obtain the public key of the blockchain node from the transaction generated by the blockchain node, and sign the digital signature according to the public key of the blockchain node Verification, in addition to verifying the digital signature, can verify that the transaction packet is the specified data structure) and the transaction is written to the blockchain. Among them, the new block in the blockchain is implemented by the above-mentioned “miners” to implement the PoW consensus competition mechanism (this mechanism can be understood as: each “miner” according to the preset technical requirements of the block, for example, according to the preset random number requirement To jointly calculate the random number, which "miner" first calculates the random number that meets the random number requirement, and the block produced by the "miner" is periodically generated as the new block, so the time interval for generating the new block is usually Related to the above-mentioned preset technical requirements, the time interval at which the blockchain generates a new block can be changed by setting different preset technical requirements.

Smart Contract: A smart contract is actually executable code stored on a blockchain. It is not strictly an account because it does not necessarily have an actual owner, but its characteristics and behavior can be Think of it as a machine account controlled by programming logic.

In order to make the disclosed technical solution easier to understand, a possible blockchain network structure involved in various embodiments of the present disclosure is introduced. FIG. 1 is a schematic diagram of an implementation environment, according to an exemplary embodiment of the present disclosure. As shown in FIG. 1, the implementation environment may include a blockchain network 10 composed of a number of nodes, the blockchain network 10 deploying a management contract, which is a contract that all nodes in the blockchain network can execute. . The management contract defines a trusted node capable of executing a smart contract, and the smart contract mentioned herein may be any smart contract, including a smart contract with a private transaction; the smart contract may also refer to a private transaction only Smart contract. The blockchain network 10 may include a first block chain node 11, a second block chain node 12, and a participating node 13. among them:

The first blockchain node 11, which may include, but is not limited to, various terminals, is a trusted node capable of executing a smart contract with a private transaction, and blocks data of the blockchain network.

The second blockchain node 12, which may include, but is not limited to, various terminals, is a trusted node capable of executing the smart contract, and blocks data of the blockchain network.

The participating nodes 13 may include, but are not limited to, various terminals, and the number of any nodes other than the trusted nodes in the blockchain network is not limited. The first blockchain node 11 and the second blockchain node 12 are capable of executing smart contracts with private transactions, and the participating nodes 13 are unable to execute smart contracts with private transactions. The first blockchain node 11, the second blockchain node 12, and the participating node 13 are all capable of executing the management contract.

FIG. 2 is a flowchart of a blockchain-based data processing method according to an exemplary embodiment of the first aspect of the present disclosure. The method is applied to a first blockchain node in a blockchain network. As shown in FIG. 2, the method can include the following steps.

Step S21: Receive a block in the blockchain network; the block includes a sub-block, where the sub-block includes a smart contract code and data corresponding to the smart contract code. The smart contract code may refer to a code of a smart contract having a private transaction, and the data corresponding to the smart contract code refers to data of a private transaction.

Step S22: Obtain a secret key from the digital envelope of the management contract by using a pre-acquired private key.

Step S23, acquiring the smart contract code in the sub-block according to the secret key, so that the first blockchain node executes the smart contract code.

Step S24, encrypting and writing the smart contract code and the data generated by the first blockchain node to execute the smart contract code into the sub-block.

Step S25, writing the sub-block into the block of the first block chain node.

The technical solution of the present disclosure is based on a blockchain capable of supporting smart contracts. For example, Ethereum is a blockchain supporting smart contracts, and the technical solution of the present disclosure can be implemented based on Ethereum. Ethereum itself has no access restrictions, and it is necessary to transform Ethereum into a license chain and deploy management contracts and smart contracts in the modified license chain, which define trusted nodes capable of executing smart contracts, for example, The management contract can define that the trusted node is capable of executing all smart contracts, in particular including smart contracts with private transactions; the management contract can also define that only trusted nodes can execute smart contracts with private transactions. In FIG. 1, the trusted node includes a first block chain node 11 and a second block chain node 12.

Include EOA in the license chain (External Owned Account) Account and contract account. Among them, the EOA account includes the ExtInfo field, the account's nonce, and the account balance balance. Among them, nonce is a number to prevent replay attacks. For every transaction sent by the account, nonce needs to be increased by 1. The original Ethereum account does not have an ExtInfo field. By adding this field, the user can be defined with the permission. The data and the account's nonce and balance form the attribute identifier of the account, and the data of the blockchain is protected against tampering. In addition to the data items owned by the EOA account, the contract account includes data corresponding to the smart contract code and the smart contract code, which is the persistent data generated by the trusted node executing the smart contract code. The privacy information of the protection blockchain node in this solution needs to include the data corresponding to the smart contract code and the smart contract code.

In step S21, the first blockchain node receives a block broadcast by a neighboring node from the blockchain network. Wherein, the data of the privacy transaction is stored in the sub-block. As shown in FIG. 1, one participating node 13 broadcasts its own block, and the first block chain node 11 receives the block of the participating node 13, assuming that the block includes a sub-block, the sub-block includes intelligence. The contract code and the data corresponding to the smart contract code.

The management contract may define a transaction interface through which a privacy transaction may be sent to the trusted node; the management contract may define an interface for adding a trusted node, as shown in FIG. 1, one of the participating nodes may be accessed through the interface 13 is added as a trusted node; the management contract may define an interface for deleting the trusted node, as shown in FIG. 1, the second blockchain node 12 may be deleted from the trusted node through the interface, so that the second region The blockchain node 12 acts as a participating node; the management contract can also define an interface to modify the trusted node. The following is an example of pseudo code for a management contract:

Contract SubChainContract {

AddMember() / / Increase the trusted node

DeleteMember() / / Delete trusted nodes

ModifyMember() / / Modify the trusted node

DealTx() / / Send private transactions to trusted nodes through this interface

SubChainName() / / Set the name of the trusted node

}

The DealTx interface is the trading interface for managing contracts. The present disclosure can transform the EVM (Contract Execution Virtual Machine) of Ethereum to perform the function of deploying the trusted node, starting the trusted node, and performing privacy transactions when executing the DealTx interface.

After receiving the block, step S22 is performed to obtain the secret key from the digital envelope of the management contract by using the pre-acquired private key. The secret key may be a digital envelope that may be encrypted by asymmetric encryption and placed in the management contract. The secret key may be a symmetric key, and the private key is an asymmetric private key. The first blockchain node first acquires a digital envelope in the management contract, and then decrypts the encrypted key by a private key to obtain a secret key.

After acquiring the secret key, step S23 may be performed, and the encrypted smart contract code in the sub-block is decrypted according to the secret key to obtain the smart contract code. After acquiring the smart contract code, the first blockchain node executes the acquired smart contract code to generate corresponding data. Then, step S24 is executed to encrypt and write the smart contract code and the data generated by the first blockchain node to execute the smart contract code into the sub-block.

The method for encrypting the smart contract code and the first blockchain node to execute the data generated by the smart contract code in step S24 includes but is not limited to the following two implementation manners:

First Embodiment: As shown in FIG. 3, FIG. 3 is a schematic flowchart of encryption in a blockchain-based data processing method according to an exemplary embodiment of the present disclosure, where the smart contract code and The first blockchain node performs data encryption generated by the smart contract code, and may include the following steps.

In step S241, the secret key is randomly generated, and the randomly generated secret key is acquired.

In step S242, the smart contract code and the data generated by the first blockchain node to execute the smart contract code are encrypted by using the randomly generated secret key.

In step S243, the randomly generated secret key is updated into the digital envelope of the management contract.

With the first embodiment, the first block chain node randomly generates a secret key each time the smart contract code and the first blockchain node perform data generated by the smart contract code are encrypted, and Step S24 is executed by using the randomly generated secret key. Since the rules for generating the secret key are randomly generated each time, the secret key generated by the first block chain node is different each time, that is, the key used by the first block chain node to perform step S24 is different, and The key used in the current execution of step S24 is updated in the digital envelope of the management contract. Therefore, the sub-blocks generated by the first block chain node in the previous execution of step S24 can no longer be decrypted, and can be applied to the need to clear the history. Recorded application scenarios.

a second implementation manner: encrypting, by the secret key, the smart contract code and the first blockchain node to execute data generated by the smart contract code; wherein the secret key is the first blockchain The node generates the randomly generated secret key and encrypts the first randomly generated secret key before the node first encrypts the smart contract code and the first blockchain node to execute the data generated by the smart contract code. In the digital envelope.

With the second embodiment, the first blockchain node randomly generates a secret key before encrypting the smart contract code and the data generated by the first blockchain node to execute the smart contract code for the first time. And using the first randomly generated secret key, step S24 is performed. After the first random generation of the secret key, the first blockchain node uses the first randomly generated secret key each time step S24 is performed. That is, as long as the first blockchain node randomly generates the secret key before encrypting the smart contract code and the data generated by the first blockchain node to execute the smart contract code, it is not necessary to randomly The secret key is generated. The first randomly generated secret key is fixed to the first block chain node to execute the secret key used in step S24. Therefore, the first block chain node uses the same secret key used in step S24.

After the smart contract code and the first blockchain node perform data encryption generated by the smart contract code, the encrypted smart contract code and data are written into the sub-block, and then step S25 is performed, The sub-block is written in a block of the first block chain node.

FIG. 4 is a schematic flowchart of a sub-block write block in a block chain-based data processing method according to an exemplary embodiment of the present disclosure. As shown in FIG. 4, the writing the sub-block into the block of the first block chain node may include the following steps.

In step S251, according to the sub-block, mining is performed by the device where the first block chain node is located.

In step S252, the sub-block after the completion of the mining is written into the block of the first block chain node.

In order to save resources, it is avoided to additionally allocate the CPU and memory resources of the mining for the sub-blocks. After the sub-block is generated, the equipment of the first block chain node that generates the sub-block is used for mining and mining. Upon completion, the sub-block is written into the block of the first block chain node. Further, the first blockchain node may send the block to other nodes in the blockchain network by way of broadcast.

In order to make the process of the sub-blocks run independently, it is logically irrelevant to the process in which the block is located. For the convenience of management, the sub-block exists in the next-level sub-directory of the block directory in which the block is located, and the sub-directory where the sub-block is located and the directory structure of the block directory Consistent. The directory structure can look like this:

▾mainChain/

▸ethash/

▾geth/

▸chaindata/ //Save block data

▸ethash/

▸keystore/

▾ subChain_2/

▾geth/

▸chaindata/ //Save the data of the sub-block

▸ethash/

▸keystore/

The process in which the block is located is completely decoupled logically and physically from the process in which the sub-block is located, so communication between them is message communication between processes. Ethereum already supports RPC (Remote Procedure Call). This solution only needs to extend the message based on RPC.

For example, as shown in the blockchain network 10 of FIG. 1, the management contract of the blockchain network 10 defines that the first blockchain node 11 and the second blockchain node 12 are trusted nodes, participating nodes. 13 is an untrusted node, and a key is stored in the digital envelope of the management contract. The second blockchain node 12 initiates a privacy transaction, and the first blockchain node 11 performs a privacy transaction as an example (of course, in other embodiments, the first blockchain node 11 may also initiate a private transaction, the second zone Blockchain node 12 performs a privacy transaction):

The block of the second block chain node 12 includes a sub-block containing information of a private transaction. After the second blockchain node 12 initiates a privacy transaction, the block of the second blockchain node 12 is transparently transmitted to the neighboring participating node 13 through the peer-to-peer network, and the participating node 13 passes the block of the second blockchain node 12 again. The peer-to-peer network is transparently transmitted to the adjacent first block chain node 11. Since the participating node 13 is not a trusted node, the participating node 13 cannot obtain the secret key from the digital envelope of the management contract, that is, the sub-block in the block of the second blockchain node 12 cannot be decrypted;

After receiving the block of the second block chain node 12, the first block chain node 11 transparently transmits the block of the second block chain node 12 to the neighboring node through the point-to-point network, and obtains the private key from the pre-acquired The key is obtained in the digital envelope of the management contract. The first block chain node 11 decrypts the encrypted smart contract code in the sub-block according to the secret key; then, the first block chain node 11 executes the smart contract code and generates corresponding data; then, The first blockchain node 11 encrypts and packs the smart contract code and corresponding data into the sub-block; then, the first block chain node 11 writes the sub-block to the first blockchain In the block of the node; finally, the first block chain node 11 broadcasts the block.

It can be seen that, through the above technical solution of the present disclosure, by deploying a management contract, the management contract can define a trusted node capable of executing a smart contract with a private transaction, that is, an object of the private transaction can be defined by the management contract, only the private transaction The object can obtain the secret key from the digital envelope of the management contract through the pre-acquired private key, and decrypt the encrypted private transaction in the sub-block by the obtained secret key, and since the sub-block is only independent in the block Part of it does not affect the validity of other data in other nodes to verify the block, and the validity of the sub-block data can only be verified by the object of the private transaction (ie, the node). Thus, the protection of privacy transactions is achieved using the above method.

Based on the same inventive concept, an embodiment of the present disclosure further provides a blockchain-based data processing apparatus for performing the above blockchain-based data processing method provided by an embodiment of the present disclosure. FIG. 5 is a block diagram of a blockchain-based data processing apparatus according to an exemplary embodiment of the present disclosure. As shown in FIG. 5, the blockchain-based data processing apparatus 500 is configured in a first blockchain node in a blockchain network, the blockchain network deploying a management contract, the management contract defining the ability to perform the a trusted node of the smart contract, the trusted node including at least the first blockchain node; the apparatus 500 includes:

The device includes:

The receiving module 510 is configured to receive a block in the blockchain network; the block includes a sub-block, where the sub-block includes a smart contract code and data corresponding to the smart contract code;

The obtaining module 520 is configured to obtain a secret key from the digital envelope of the management contract by using a pre-acquired private key;

The decryption module 530 is configured to acquire the smart contract code in the sub-block according to the secret key, so that the first blockchain node executes the smart contract code;

a first write module 540 configured to encrypt and write data generated by the smart contract code and the first blockchain node to the smart contract code into a sub-block;

The second write module 550 is configured to write the sub-block into a block of the first block chain node.

Optionally, as shown in FIG. 7, the second writing module 550 includes:

a mining sub-module 551 configured to perform mining by a device in which the first blockchain node is located according to the sub-block;

The write sub-module 552 is configured to write the sub-block after the completion of the mining into the block of the first block chain node.

Optionally, as shown in FIG. 6, the first writing module 540 includes:

The obtaining submodule 541 is configured to randomly generate the secret key and obtain the randomly generated secret key;

The encryption sub-module 542 is configured to encrypt the smart contract code and the data generated by the first blockchain node to execute the smart contract code by using the randomly generated secret key;

The update sub-module 543 is configured to update the randomly generated secret key to the digital envelope of the management contract.

Optionally, the first writing module 540 is further configured to:

Encrypting the smart contract code and the first blockchain node to execute data generated by the smart contract code by using the secret key;

The secret key is a secret generated randomly before the first blockchain node encrypts the smart contract code and the data generated by the first blockchain node to execute the smart contract code for the first time. Key, and the first randomly generated secret key is stored in the digital envelope of the management contract.

Optionally, the sub-block exists in a sub-directory of a sub-directory of the block directory in which the block is located, and a sub-directory in which the sub-block is located is consistent with a directory structure of the block directory.

Optionally, the management contract defines at least a transaction interface, and an interface for adding, deleting, and modifying a trusted node.

Optionally, the private key is an asymmetric private key, and the secret key is a symmetric key, and the secret key is asymmetrically encrypted and placed in a digital envelope of the management contract.

It should be clearly understood by those skilled in the art that for the convenience and brevity of the description, the specific working process of each module of the blockchain-based data processing apparatus described above may refer to the corresponding process in the foregoing method embodiment. I won't go into details here.

In addition, the division of the block module-based data processing device component module is only a logical function division, and the actual implementation may have another division mode. Moreover, the physical implementation of each module may also be in various manners, which is not limited in this disclosure.

FIG. 8 is a block diagram of an electronic device 800, according to an exemplary embodiment. As shown in FIG. 8, the electronic device 800 can include a processor 801, a memory 802, a multimedia component 803, an input/output (I/O) interface 804, and a communication component 805.

The processor 801 is configured to control the overall operation of the electronic device 800 to complete all or part of the above-described blockchain-based data processing method. Memory 802 is used to store various types of data to support operations at the electronic device 800, such as may include instructions for any application or method operating on the electronic device 800, as well as application related data, For example, contact data, sent and received messages, pictures, audio, video, and so on. The memory 802 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as a static random access memory (SRAM), an electrically erasable programmable read only memory ( Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read Only Memory (Erasable) Programmable Read-Only Memory (EPROM), Programmable Read-Only Memory (PROM), Read-Only Memory (ROM), magnetic memory, flash memory, disk or optical disk. The multimedia component 803 can include a screen and audio components. The screen may be, for example, a touch screen, and the audio component is used to output and/or input an audio signal. For example, the audio component can include a microphone for receiving an external audio signal. The received audio signal may be further stored in memory 802 or transmitted via communication component 805. The audio component also includes at least one speaker for outputting an audio signal. The I/O interface 804 provides an interface between the processor 801 and other interface modules. The other interface modules may be keyboards, mice, buttons, and the like. These buttons can be virtual buttons or physical buttons. Communication component 805 is used for wired or wireless communication between the electronic device 800 and other devices. Wireless communication, such as Wi-Fi, Bluetooth, Near Field Communication (NFC), 2G, 3G or 4G, or a combination of one or more of them, so the corresponding communication component 805 can include: Wi-Fi module, Bluetooth module, NFC module.

In an exemplary embodiment, electronic device 800 may be implemented by one or more application specific integrated circuits (Application) Specific Integrated Circuit (ASIC), Digital Signal Processor (DSP), Digital Signal Processing Device (DSPD), Programmable Logic Device (PLD), on-site A Field Programmable Gate Array (FPGA), controller, microcontroller, microprocessor or other electronic component implementation for performing the blockchain-based data processing method described above.

In another exemplary embodiment, there is also provided a computer readable storage medium comprising program instructions, such as a memory 802 comprising program instructions executable by processor 801 of electronic device 800 to perform the above-described zone based Block chain data processing method.

The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solutions of the present disclosure within the scope of the technical idea of the present disclosure. These simple variations are all within the scope of the disclosure.

It should be further noted that the specific technical features described in the above specific embodiments may be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure is applicable to various possibilities. The combination method will not be described separately.

In addition, any combination of various embodiments of the present disclosure may be made as long as it does not deviate from the idea of the present disclosure, and should also be regarded as the disclosure of the present disclosure.

Claims

A blockchain-based data processing method, wherein the method is applied to a first blockchain node in a blockchain network, the blockchain network deploying a management contract, and the management contract defines A trusted node capable of executing a smart contract, the trusted node including at least the first blockchain node;

The method includes:

Receiving a block in the blockchain network; the block includes a sub-block, the sub-block including a smart contract code and data corresponding to the smart contract code;

Obtaining a secret key from a digital envelope of the management contract by a pre-acquired private key;

Obtaining the smart contract code in the sub-block according to the secret key, so that the first blockchain node executes the smart contract code;

Encrypting the smart contract code and the data generated by the first blockchain node to execute the smart contract code into a sub-block;

The sub-block is written into a block of the first block chain node.
The method according to claim 1, wherein the writing the sub-block to the block of the first block chain node comprises:

Digging according to the device in which the first block chain node is located according to the sub-block;

The sub-block after the completion of the mining is written into the block of the first block chain node.
The method according to claim 1, wherein said encrypting said smart contract code and said first blockchain node to execute data generated by said smart contract code comprises:

Randomly generating the secret key and obtaining the randomly generated secret key;

Encrypting the smart contract code and the first blockchain node to execute data generated by the smart contract code by using the randomly generated secret key;

The randomly generated secret key is updated into the digital envelope of the management contract.
The method according to claim 1, wherein said encrypting said smart contract code and said first blockchain node to execute data generated by said smart contract code comprises:

Encrypting the smart contract code and the first blockchain node to execute data generated by the smart contract code by using the secret key;

The secret key is a secret generated randomly before the first blockchain node encrypts the smart contract code and the data generated by the first blockchain node to execute the smart contract code for the first time. Key, and the first randomly generated secret key is stored in the digital envelope of the management contract.
The method according to claim 1, wherein the sub-block exists in a sub-directory of a sub-directory of the block directory in which the block is located, and a sub-directory in which the sub-block is located is The directory structure of the block directory is the same.
The method of claim 1 wherein said management contract defines at least a transaction interface and an interface for adding, deleting, and modifying trusted nodes.
The method according to claim 1, wherein the private key is an asymmetric private key, the secret key is a symmetric key, and the secret key is asymmetrically encrypted and placed in a digital envelope of the management contract. in.
A blockchain-based data processing apparatus, wherein the apparatus is configured in a first blockchain node in a blockchain network, the blockchain network deploying a management contract, and the management contract defines A trusted node capable of executing a smart contract, the trusted node including at least the first blockchain node;

The device includes:

a receiving module, configured to receive a block in the blockchain network; the block includes a sub-block, where the sub-block includes a smart contract code and data corresponding to the smart contract code;

An obtaining module configured to obtain a secret key from a digital envelope of the management contract by using a pre-acquired private key;

a decryption module configured to acquire the smart contract code in the sub-block according to the secret key, so that the first blockchain node executes the smart contract code;

a first write module configured to encrypt and write data generated by the smart contract code and the first blockchain node to the smart contract code into a sub-block;

A second write module is configured to write the sub-block into a block of the first block chain node.
The apparatus of claim 8 wherein said second write module comprises:

a mining sub-module configured to mine by the device in which the first block chain node is located according to the sub-block;

The write submodule is configured to write the sub-block after the completion of the mining into the block of the first block chain node.
The device according to claim 8, wherein the first writing module comprises:

Obtaining a sub-module configured to randomly generate the secret key and obtain a randomly generated secret key;

An encryption submodule configured to encrypt the smart contract code and the data generated by the first blockchain node to execute the smart contract code using the randomly generated secret key; and

The update submodule is configured to update the randomly generated secret key to the digital envelope of the management contract.
The apparatus of claim 8, wherein the first write module is further configured to:

Encrypting the smart contract code and the first blockchain node to execute data generated by the smart contract code by using the secret key;

The secret key is a secret generated randomly before the first blockchain node encrypts the smart contract code and the data generated by the first blockchain node to execute the smart contract code for the first time. Key, and the first randomly generated secret key is stored in the digital envelope of the management contract.
The apparatus according to claim 8, wherein the sub-block exists in a sub-directory of a sub-directory of the block directory in which the block is located, and a sub-directory in which the sub-block is located is The directory structure of the block directory is the same.
The apparatus of claim 8 wherein said management contract defines at least a transaction interface and an interface for adding, deleting, and modifying trusted nodes.
The apparatus according to claim 8, wherein the private key is an asymmetric private key, and the secret key is a symmetric key, and the secret key is asymmetrically encrypted and placed in a digital envelope of the management contract. in.
A computer readable storage medium, characterized in that the computer readable storage medium is for storing a computer program, the computer program comprising instructions for performing the method of any of claims 1-7.
An electronic device, comprising:

The computer readable storage medium of claim 15;

One or more processors for executing a program in the computer readable storage medium.