WO2022267185A1

WO2022267185A1 - Blockchain network-based secure and efficient item transaction method and system, and storage medium

Info

Publication number: WO2022267185A1
Application number: PCT/CN2021/110856
Authority: WO
Inventors: 张�荣; 王心禹; 储栋; 赵莉; 何亚运
Original assignee: 安徽安时科技发展有限公司
Priority date: 2021-06-24
Filing date: 2021-08-05
Publication date: 2022-12-29
Also published as: CN113450092A

Abstract

A blockchain network-based secure and efficient item transaction method and system, and a storage medium, which relate to the technical field of blockchains. The method comprises: performing a rights acknowledgement digitizing operation on an item; performing an authentication and verification operation on the item; authenticating the price once verification is successful; updating a digital certificate identification contract on the basis of the authenticated price and authentication center information; publishing transaction information; generating an item transaction contract; and once the transaction is completed, updating the transaction contract in real time. The method digitizes an item on the basis of a blockchain, so that the rights and interests of a physical item are mapped as the rights and interests of a digital asset, i.e. same serves as an intermediate value medium which connects the real world and the digital rights world. Meanwhile, the described method also integrates the technical advantages of blockchain anti-tampering and decentralization, so that the mutual confirmation, transaction flow and traceability of digital rights and interests are achieved, which has utility value in a practical sense.

Description

A method, system, and storage medium for safe and efficient transaction of items based on blockchain network

technical field

The present invention relates to the technical field of block chain, in particular to a method , system and storage medium for safe and efficient transaction of goods based on block chain network.

Background technique

Blockchain technology, also known as "distributed ledger technology", is a decentralized and collectively maintained distributed ledger solution. Its essence is a distributed database system that is collectively participated by multiple nodes. Blockchain is not a single technology, but the result of the integration of multiple technologies. Using blockchain technology to maintain a reliable and difficult-to-tamper ledger record can reduce the risk of trust and effectively reduce the risk of collaboration between the parties. maintenance costs. With the development of blockchain technology, smart contracts become possible, and this disruptive technology will bring about major changes in the structure of human society. Smart contracts are an important feature of the blockchain. Its essence is a piece of program code. This code will be automatically executed by a computer or computer network in accordance with the rights and obligations of signing the contract, without the need for a central node to control it. This characteristic makes it the technical basis for programmable money and programmable finance. In recent years, the value of data has been accelerated, digital technology has been integrated with the real economy, and the potential of industrial digital applications has been unleashed. The digital value has been recognized by the industry, followed by the digitization of items and the transaction and circulation of digital items. However, the traditional centralized transaction method cannot meet the growing demand. In this case, how to effectively use blockchain technology to Realizing the digitization of items and the transaction of digital items has become an urgent problem to be solved.

technical problem

In addition, the existing digitalization of physical item ownership is not enough, and item ownership is stored on a centralized platform, which poses security risks, because the security measures of the centralized trading platform cannot effectively guarantee asset security, and user assets are always under threat, so users face high risks. Risks include potential operational issues, market manipulation, hardware failure, long waiting times, and other potential problems caused by the huge transaction volume. Lack of trust and transparency: The transaction process and actual costs are opaque, which also needs to be addressed urgently The problem.

technical solution

Aiming at the deficiencies of the existing technology, the present invention provides a safe and efficient transaction method for items based on the blockchain network to solve the problem of insufficient digitalization of the ownership of physical items in the prior art, as well as the transaction security of the centralized trading platform and the traceability of transaction items. question.

The present invention solves technical problem and adopts following technical scheme:

A safe and efficient transaction method for items based on a blockchain network, comprising the following steps:

Carry out the digital operation of confirming the title of the item, including:

Matching items generate corresponding digital warrant identification contracts in the blockchain network;

Configure the data record interaction carrier of the item, and generate a constant and unique public key and private key in it;

Write the public key into the digital warrant identification contract, and store the address of the digital warrant identification contract into the data record interaction carrier;

Perform authentication and verification operations on items, conduct price appraisal after the verification is passed, and update the digital warrant identification contract based on the authenticated price and the information of the appraisal center;

Publish transaction information, generate an item transaction contract, and the transaction contract is configured to have functions including item authentication, logistics records, confirmation of receipt and setting of transaction chains;

After the transaction is completed, the transaction contract is updated in real time.

Preferably, the authentication verification operation specifically includes:

Read the digital warrant in the data record interaction carrier to identify the contract address, and establish communication with the blockchain network;

Read the digital warrant to identify the contract, and generate a random number and send it to the data record interaction carrier;

The data record interaction carrier calls the internal private key to sign the random number and returns it to the blockchain network;

The digital warrant identification contract calls the corresponding public key to unsign the signature, compares the random numbers, and completes the verification.

Preferably, after the verification is passed, the price appraisal is carried out, and updating the digital warrant identification contract based on the appraisal price and appraisal center information specifically includes:

After the verification is passed, the item is priced on-site or remotely;

Record the public key of the authentication center in the digital warrant identification contract;

Use the private key matched by the authentication center to sign the authentication price, time, and authenticator, and write it into the digital warrant identification contract.

Preferably, the digital warrant identification contract is configured to have the functions of random number generation, signature verification and next transaction contract address recording, wherein,

The random number is dynamically generated by the digital warrant identification contract according to a random algorithm, and is discarded after the verification operation is completed;

The signature verification uses the RSA algorithm.

Preferably, the confirmation of receipt specifically includes:

Perform authentication and verification operations on the items, and confirm receipt after the verification is passed;

The transaction contract changes the owner of the item once, and according to the selected object lock or person lock, the owner is recorded as anonymous information or the owner is recorded as blockchain network account information.

Preferably, the function of setting the transaction chain specifically includes:

If the current owner initiates a transaction, after the transaction is completed, the current transaction contract will automatically record the consignee as the owner;

If the consignee initiates a new transaction, the current transaction contract records the address of the next transaction contract;

If the address of the next transaction contract is empty, the owner of the transaction contract record is the owner of the current item.

Preferably, the blockchain network includes: adopting a weakly centralized consortium blockchain technology for configuration and establishment in a trusted execution environment, or adopting a decentralized public blockchain technology for configuration and establishment.

The present invention also provides a safe and efficient transaction system for items based on a blockchain network, including a digital right confirmation center, an item identification center, a property rights trading platform, a blockchain network, a data record interaction carrier, and a read-write device module;

The digital right confirmation center is configured to perform right confirmation digital operations on items, specifically including generating a corresponding digital warrant identification contract in cooperation with the blockchain network, controlling the data record interaction carrier of the item to generate a constant and unique public key and private key, Write the public key into the digital warrant identification contract, and store the address of the digital warrant identification contract into the data record interaction carrier;

The data record interaction carrier is configured to record the public key, private key, and digital warrant to identify the contract storage address and execute the signature of the random number, and cooperate with the read-write device module to realize the integration with the blockchain network, digital right confirmation center, and item identification. Data interactive transmission of the center and property rights trading platform;

The item identification center is configured to perform authentication and verification operations on items, perform price identification after the verification is passed, and update the digital warrant identification contract based on the identified price and identification center information, specifically including:

After the item identification center passes the verification, the item will be priced on-site or remotely;

Record the public key of the item identification center in the digital warrant identification contract;

Use the private key matched by the item appraisal center to sign the appraisal price, time, and authenticator, and write it into the digital warrant identification contract;

The property rights transaction platform is configured to publish transaction information, and cooperate with the block chain network to generate an item transaction contract. The transaction contract is configured to include functions of item authentication, logistics records, confirmation of receipt, and setting of transaction chains, and After the transaction is completed, the transaction contract is updated in real time.

Preferably, the blockchain network, the data record interaction carrier and the read-write device module cooperate with each other to perform authentication and verification operations, specifically including:

The reading and writing device module reads the digital warrant in the data record interaction carrier to identify the contract address, and establishes communication with the blockchain network;

Read the digital warrant identification contract, and generate random numbers in the blockchain network and send them to the data record interaction carrier through the read-write device module;

The digital warrant identification contract calls the corresponding public key to unsign the signature, compares the random number, and completes the verification;

The property rights trading platform cooperates with other modules to perform the functions of confirming receipt and setting up transaction chains, specifically including:

The transaction contract changes the owner of the item once, and according to the selected object lock or person lock, the owner is recorded as anonymous information or the owner is recorded as blockchain network account information;

Set the transaction chain function: If the current owner initiates a transaction, after the transaction is completed, the current transaction contract will automatically record the consignee as the owner;

If the address of the next transaction contract is empty, the owner of the transaction contract record is the owner of the current item;

Among them, the transaction contract and the digital warrant identification contract jointly form the traceability function of the item transaction chain.

The present invention also provides a computer-readable storage medium, the computer-readable storage medium stores a safe and efficient transaction program for items, and the safe and efficient transaction program for items can be executed by one or more processors to achieve the aforementioned The steps of a safe and efficient transaction method for items based on a blockchain network.

Beneficial effect

Compared with the prior art, the present invention has the following beneficial effects:

The present invention builds digital items based on the blockchain, and maps the rights and interests of physical items into digital asset rights, that is, as an intermediate value medium, connecting the real world and the world of digital rights, and at the same time integrating the anti-tampering and decentralization of the blockchain The advantages of digitalized technology realize the mutual confirmation of digital rights, transaction flow and traceability;

At the same time, for the function of identity authentication, the present invention completely performs encryption and decryption operations and identity information comparison, verification and confirmation in the blockchain network, without directly using the secret key to confirm the identity authentication process. Effectively guarantee the security of secret key management and use, and replace the traditional schemes that need to rely on Ukey, etc., there are problems of inflexible use and storage. The blockchain asymmetric encryption identity authentication scheme adopted realizes decentralization, detrust and High reliability, does not depend on any centralized key storage mechanism, avoiding the risk of key leakage;

In addition, the present invention maps physical entities in the real world to the blockchain through smart contracts, realizes the bridging function, and realizes the full life cycle management and tracking of item transactions through the generation of transaction chains, and solves the problem of single contract record The capacity and redundancy of the contract are more flexible and operable, and also realize the important functions of anti-counterfeiting, tampering, transparent disclosure and transaction traceability query;

Compared with the prior art, other outstanding substantive features and remarkable progress of the present invention are further introduced in the embodiment part.

Description of drawings

Other features, objects and advantages of the present invention will become more apparent upon reading the detailed description of non-limiting embodiments made with reference to the following drawings:

Fig. 1 is a schematic flow diagram of a safe and efficient transaction method for items based on a blockchain network in Embodiment 1;

FIG. 2 is a schematic structural diagram of a safe and efficient transaction system for items based on a blockchain network in Embodiment 2.

Embodiments of the present invention

In the following, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

It should be noted that certain names are used in the specification and claims to refer to specific components. It should be understood that those skilled in the art may use different names to refer to the same component. The specification and claims of the present application do not use the difference in name as a way to distinguish components, but use the substantial difference in function of components as a criterion for distinguishing components. As used in the specification and claims of this application, "comprising" or "comprising" is an open term, which should be interpreted as "including but not limited to" or "including but not limited to". The embodiments described in the detailed description are preferred embodiments of the present invention, and are not intended to limit the scope of the present invention.

Furthermore, those skilled in the art know that various aspects of the present invention can be implemented as a system, method or computer program product. Therefore, various aspects of the present invention can be implemented in the form of a combination of software and hardware, which can be collectively referred to as "circuit", "module" or "system" herein. Furthermore, in some embodiments, various aspects of the present invention can also be implemented in the form of a computer program product on one or more microcontroller-readable media containing microcontroller-readable program code.

Example 1

As shown in Figure 1, a method for safe and efficient transaction of items based on a blockchain network provided by this embodiment includes the following steps:

Carry out the digital operation of confirming the title of the item, including:

Matching items generate a corresponding digital warrant identification contract in the blockchain network. The digital warrant identification contract in this embodiment is configured to have the functions of random number generation, signature verification, and next transaction contract address recording. Among them,

The signature verification uses the RSA algorithm.

For example, after completing the normal procedures and confirming that it is correct and legal, the digital right confirmation (management) center (platform) will generate a corresponding item digital warrant identification contract for the organization (or individual) using the item digital warrant card. Uniquely maps this entity item.

Configure the data record interaction carrier of the item, and generate a constant and unique public key and private key in it; the data record interaction carrier in this embodiment can adopt a CPU card chip with high security and large capacity, and support DES/AES/RSA , SHA1, SSF33, SM1/SM2/SM3/SM4 and other encryption algorithms and various security protection measures, with good anti-attack capabilities. Support a variety of communication interfaces: contact (ISO/IEC 7816), contactless (ISO/IEC 14443A), internally generate asymmetric public-private keys, once generated cannot be changed, the private key cannot be read, and will be automatically destroyed by external damage, not here too much elaboration;

In this embodiment, the digital warrant identification contract includes functions of generating random numbers, RSA algorithm verification signature, and recording the address of the next transaction contract.

Generate random number: the first step of the item authentication function, the digital warrant identification contract generates a random number according to a random algorithm, which is used for the plaintext signed by the data record interaction carrier. This random number changes dynamically according to the request to prevent replay, and is determined by The authentication contract is saved, discarded once used, and regenerated next time.

RSA algorithm verification signature: The internal chip of the data record interaction carrier signs the obtained random number with the private key, and sends the random number and the corresponding signature to the contract. At this time, the signature verification method takes effect. First, compare the random number to determine whether to use it , not used for RSA signature verification.

Perform authentication verification operations on items, including:

After the verification is passed, the price appraisal will be carried out, and the digital warrant identification contract will be updated based on the appraisal price and appraisal center information, including:

After the verification is passed, the item is priced on-site or remotely;

Publish transaction information and generate an item transaction contract. The transaction contract is configured to have functions including item authentication, logistics records, confirmation of receipt and setting of transaction chains. Confirmation of receipt here specifically includes:

In this embodiment, setting the transaction chain function specifically includes:

The transaction contract here represents a transfer of the ownership of the item, and records the entire process of its transfer from the perspective of the item. The digital warrant identification contract above indicates the birth of the item in the blockchain world, and the transaction indicates a transfer.

Item authentication: the same function as the digital warrant identification contract, which is used to authenticate the physical object and prove its uniqueness.

Confirmation of receipt: After receiving the goods and the data record interaction carrier, the user scans the data record interaction carrier for item authentication, and confirms the receipt after the authentication is passed. At this time, the transaction contract will change the owner of the item, and only It can be changed once and then locked. The confirmation of receipt here is divided into object anchoring and person anchoring. If object anchoring is selected, the owner will be recorded as anonymous information. If person anchoring is selected, the owner will be recorded as an account on the property rights trading platform information.

Set the transaction chain: After confirming the receipt, the chain trace function will set the address of the next transaction contract of the previous transaction contract as the address of this contract. If the receipt is not confirmed after 7 days of arrival, it will be automatically set as an item anchor, and the owner will be recorded as anonymous information.

In this embodiment, the data record interaction carrier sets the transaction chain head: when the applicant publishes the transaction on the property transaction platform, the address of the next transaction contract will be recorded as the No. 1 transaction contract, and so on, and the transaction contract will be jointly formed Tracing the source of the transaction chain; starting from the contract identified by the digital warrant to trace the chain, because each contract records the address of the next transaction contract, if the address of the next transaction contract is empty, it means that the transaction has reached the end, that is, all the contracts recorded at the end The owner of the current item. If this owner initiates a transaction, after the transaction is completed, the end contract will automatically record the recipient as the owner. This completes the circulation and recording of the entire transaction.

The blockchain network in this embodiment includes: adopting weakly centralized consortium blockchain technology for configuration and establishment in a trusted execution environment, or adopting decentralized public blockchain technology for configuration and establishment.

Example 2

As shown in Figure 2, this embodiment provides a blockchain network-based symmetrical encryption traceability transaction system, including a digital right confirmation center, an item identification center, a property rights trading platform, a blockchain network, a data record interaction carrier, and a reader write device module;

For example, in the item identification center, before the seller publishes the transaction to the property right trading platform, he needs to apply for identification in the item identification center. Before submitting the identification process, it is necessary to scan the data record interaction carrier, and the read-write device module reads the digital warrant identification contract address in the data record interaction carrier, and synchronizes it to the identification center. After receiving the identification application process, the identification center arranges experts to conduct on-site or remote identification , After the appraisal is completed, the item will be valued, and the appraisal price of the item will be written into the digital warrant identification contract. At the same time, the authentication center signs the authentication price, time, and authenticator with its own private key, and records it in the authentication contract, and records the public key of the authentication center in the digital warrant identification contract, and the verifier can use the digital warrant to identify the contract The public key of the authentication center verifies the signature result to identify the authenticity of the authentication result.

The property rights transaction platform is configured to publish transaction information, and cooperate with the block chain network to generate an item transaction contract. The transaction contract is configured to include functions of item authentication, logistics records, confirmation of receipt, and setting of transaction chains, and After the transaction is completed, the transaction contract will be updated in real time. In addition, after the above identification process is completed, the user can officially release the transaction information and pay a certain percentage of deposit to ensure that the user trades with real items, including docking logistics centers, after-sales, etc. Supporting facilities.

In this embodiment, the blockchain network, the data record interaction carrier and the read-write device module cooperate with each other to perform authentication and verification operations, specifically including:

The digital warrant identification contract calls the corresponding public key to unsign the signature, compares the random numbers, and completes the verification;

Example 3

A computer-readable storage medium, characterized in that the computer-readable storage medium stores a program for safe and efficient transaction of items, and the program for safe and efficient transaction of items can be executed by one or more processors, so as to realize the The steps of the safe and efficient transaction method for items based on the block chain network described in 1.

Those of ordinary skill in the art can appreciate that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may implement the described functions using different methods for each specific application, but such implementation should not be regarded as exceeding scope of the invention.

Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiment, and will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. Another point, as shown or The mutual coupling or direct coupling or communication connection discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The unit described as a separate component may or may not be physically separated, and the component displayed as a unit may or may not be a physical unit, that is, it may be located in one place. Or it can be distributed to multiple on the network unit. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.

If the functions described above are realized in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention essentially or The part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, the computer software product is stored in a storage medium, and includes several instructions to make a computer device (which can be a personal computer) , a server, or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the present invention.

The foregoing storage medium includes: a USB flash drive, a mobile hard disk, and a read-only memory (ROM, Read-Only Memory). Random access memory (RAM, Random, Access, Memory), magnetic disk or optical disk and other media that can store program verification codes.

It will be apparent to those skilled in the art that the invention is not limited to the details of the above-described exemplary embodiments, but that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Accordingly, the embodiments should be regarded in all points of view as exemplary and not restrictive, the scope of the invention being defined by the appended claims rather than the foregoing description, and it is therefore intended that the scope of the invention be defined by the appended claims rather than by the foregoing description. All changes within the meaning and range of equivalents of the elements are embraced in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

In addition, it should be understood that although this specification is described according to implementation modes, not each implementation mode only contains an independent technical solution, and this description in the specification is only for clarity, and those skilled in the art should take the specification as a whole , the technical solutions in the various embodiments can also be properly combined to form other implementations that can be understood by those skilled in the art.

Claims

A safe and efficient transaction method for items based on a blockchain network is characterized in that it includes the following steps:

Carry out the digital operation of confirming the title of the item, including:

Matching items generate corresponding digital warrant identification contracts in the blockchain network;

Configure the data record interaction carrier of the item, and generate a constant and unique public key and private key in it;

Write the public key into the digital warrant identification contract, and store the address of the digital warrant identification contract into the data record interaction carrier;

Perform authentication and verification operations on items, conduct price appraisal after the verification is passed, and update the digital warrant identification contract based on the authenticated price and the information of the appraisal center;

Publish transaction information, generate an item transaction contract, and the transaction contract is configured to have functions including item authentication, logistics records, confirmation of receipt and setting of transaction chains;

After the transaction is completed, the transaction contract is updated in real time.
According to claim 1, a safe and efficient transaction method for items based on a blockchain network, wherein the authentication verification operation specifically includes:

Read the digital warrant in the data record interaction carrier to identify the contract address, and establish communication with the blockchain network;

Read the digital warrant to identify the contract, and generate a random number and send it to the data record interaction carrier;

The data record interaction carrier calls the internal private key to sign the random number and returns it to the blockchain network;

The digital warrant identification contract calls the corresponding public key to unsign the signature, compares the random numbers, and completes the verification.
A safe and efficient transaction method for items based on a blockchain network according to claim 1, wherein the price appraisal is performed after the verification is passed, and the digital warrant identification contract is updated based on the appraisal price and appraisal center information. include:

After the verification is passed, the item is priced on-site or remotely;

Record the public key of the authentication center in the digital warrant identification contract;

Use the private key matched by the authentication center to sign the authentication price, time, and authenticator, and write it into the digital warrant identification contract.
According to claim 2, a safe and efficient transaction method for items based on a blockchain network is characterized in that the digital warrant identification contract is configured to have the functions of random number generation, signature verification and next transaction contract address recording, in,

The random number is dynamically generated by the digital warrant identification contract according to a random algorithm, and is discarded after the verification operation is completed;

The signature verification uses the RSA algorithm.
According to claim 4, a safe and efficient transaction method for items based on a blockchain network, wherein said confirmation of receipt specifically includes:

Perform authentication and verification operations on the items, and confirm receipt after the verification is passed;

The transaction contract changes the owner of the item once, and according to the selected object lock or person lock, the owner is recorded as anonymous information or the owner is recorded as blockchain network account information.
According to claim 5, a safe and efficient transaction method for items based on a blockchain network, wherein the function of setting the transaction chain specifically includes:

If the current owner initiates a transaction, after the transaction is completed, the current transaction contract will automatically record the consignee as the owner;

If the consignee initiates a new transaction, the current transaction contract records the address of the next transaction contract;

If the address of the next transaction contract is empty, the owner of the transaction contract record is the owner of the current item.
According to claim 6, a safe and efficient transaction method for items based on a blockchain network, characterized in that the blockchain network includes: using a weakly centralized alliance blockchain technology in a trusted execution environment Configuration and formation in the network, or using decentralized public blockchain technology for configuration and formation.
A safe and efficient transaction system for items based on a blockchain network, characterized in that it includes a digital right confirmation center, an item identification center, a property rights trading platform, a blockchain network, a data record interaction carrier, and a read-write device module;

The digital right confirmation center is configured to perform right confirmation digital operations on items, specifically including generating a corresponding digital warrant identification contract in cooperation with the blockchain network, controlling the data record interaction carrier of the item to generate a constant and unique public key and private key, Write the public key into the digital warrant identification contract, and store the address of the digital warrant identification contract into the data record interaction carrier;

The data record interaction carrier is configured to record the public key, private key, and digital warrant to identify the contract storage address and execute the signature of the random number, and cooperate with the read-write device module to realize the integration with the blockchain network, digital right confirmation center, and item identification. Data interactive transmission of the center and property rights trading platform;

The item identification center is configured to perform authentication and verification operations on items, perform price identification after the verification is passed, and update the digital warrant identification contract based on the identified price and identification center information, specifically including:

After the item identification center passes the verification, the item will be priced on-site or remotely;

Record the public key of the item identification center in the digital warrant identification contract;

Use the private key matched by the item appraisal center to sign the appraisal price, time, and authenticator, and write it into the digital warrant identification contract;

The property rights transaction platform is configured to publish transaction information, and cooperate with the block chain network to generate an item transaction contract. The transaction contract is configured to include functions of item authentication, logistics records, confirmation of receipt, and setting of transaction chains, and After the transaction is completed, the transaction contract is updated in real time.
According to claim 8, a safe and efficient transaction system for items based on a blockchain network is characterized in that the blockchain network, the data record interaction carrier and the read-write device module cooperate with each other to perform authentication and verification operations, Specifically include:

The reading and writing device module reads the digital warrant in the data record interaction carrier to identify the contract address, and establishes communication with the blockchain network;

Read the digital warrant identification contract, and generate random numbers in the blockchain network and send them to the data record interaction carrier through the read-write device module;

The data record interaction carrier calls the internal private key to sign the random number and returns it to the blockchain network;

The digital warrant identification contract calls the corresponding public key to unsign the signature, compares the random number, and completes the verification;

The property rights trading platform cooperates with other modules to perform the functions of confirming receipt and setting up transaction chains, specifically including:

Perform authentication and verification operations on the items, and confirm receipt after the verification is passed;

The transaction contract changes the owner of the item once, and according to the selected object lock or person lock, the owner is recorded as anonymous information or the owner is recorded as blockchain network account information;

Set the transaction chain function: If the current owner initiates a transaction, after the transaction is completed, the current transaction contract will automatically record the consignee as the owner;

If the consignee initiates a new transaction, the current transaction contract records the address of the next transaction contract;

If the address of the next transaction contract is empty, the owner of the transaction contract record is the owner of the current item;

Among them, the transaction contract and the digital warrant identification contract jointly form the traceability function of the item transaction chain.
A computer-readable storage medium, characterized in that the computer-readable storage medium stores a safe and efficient transaction program for items, and the safe and efficient transaction program for items can be executed by one or more processors to realize the The steps of the safe and efficient transaction method for items based on the blockchain network described in any one of requirements 1 to 7.