WO2020238051A1 - 基于区块链的电子合同存储方法、装置、电子设备及计算机非易失性可读存储介质 - Google Patents

基于区块链的电子合同存储方法、装置、电子设备及计算机非易失性可读存储介质 Download PDF

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Publication number
WO2020238051A1
WO2020238051A1 PCT/CN2019/117682 CN2019117682W WO2020238051A1 WO 2020238051 A1 WO2020238051 A1 WO 2020238051A1 CN 2019117682 W CN2019117682 W CN 2019117682W WO 2020238051 A1 WO2020238051 A1 WO 2020238051A1
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Prior art keywords
contract
blockchain network
data
node
electronic contract
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PCT/CN2019/117682
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English (en)
French (fr)
Inventor
杨小彦
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平安普惠企业管理有限公司
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Publication of WO2020238051A1 publication Critical patent/WO2020238051A1/zh

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Classifications

    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/60Protecting data
    • G06F21/602Providing cryptographic facilities or services
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/60Protecting data
    • G06F21/64Protecting data integrity, e.g. using checksums, certificates or signatures
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00Network architectures or network communication protocols for network security
    • H04L63/04Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
    • H04L63/0428Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00Network arrangements or protocols for supporting network services or applications
    • H04L67/01Protocols
    • H04L67/10Protocols in which an application is distributed across nodes in the network
    • H04L67/1097Protocols in which an application is distributed across nodes in the network for distributed storage of data in networks, e.g. transport arrangements for network file system [NFS], storage area networks [SAN] or network attached storage [NAS]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/06Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols the encryption apparatus using shift registers or memories for block-wise or stream coding, e.g. DES systems or RC4; Hash functions; Pseudorandom sequence generators
    • H04L9/0643Hash functions, e.g. MD5, SHA, HMAC or f9 MAC
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/50Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols using hash chains, e.g. blockchains or hash trees

Definitions

  • This application relates to the field of blockchain technology, and in particular to a blockchain-based electronic contract storage method, device, electronic equipment, and computer non-volatile readable storage medium.
  • An electronic contract is an electronic agreement signed in electronic form through an electronic information network to clarify the rights and obligations between two or more parties.
  • electronic contracts have taken a place in e-commerce activities due to their convenient transmission and cost-saving characteristics.
  • properly and securely storing electronic contracts is an important part of maintaining personal and corporate information security.
  • the current method of saving electronic contracts is mainly to synthesize the electronic contract and the electronic signature data of the signatory, and save the synthesized electronic contract document in a disk.
  • an object of this application is to provide a blockchain-based electronic contract storage method, device, electronic equipment, and computer non-volatile readable storage medium.
  • a blockchain-based electronic contract storage method includes: obtaining the original electronic contract uploaded to the blockchain network; the original electronic contract is obtained by synthesizing the electronic contract and the electronic signature data of the signatory Electronic documents; preprocess the original electronic contract to obtain the original electronic contract data; use a preset encryption algorithm to encrypt the original electronic contract data to generate a data fingerprint; broadcast on the blockchain network The contract number corresponding to the original electronic contract and the data fingerprint for information verification; if the information verification is successful, the contract number and the data fingerprint are added to the blockchain maintained by each node in the blockchain network Wherein, the contract number is used to query the data fingerprint from the blockchain maintained by each node in the blockchain network.
  • a block chain-based electronic contract storage device includes: a first acquisition module for obtaining the original electronic contract uploaded to the block chain network; the original electronic contract is obtained by synthesizing the electronic contract and the signatory
  • the first processing module is used to preprocess the original electronic contract to obtain the original electronic contract data; the first encryption module is used to use a preset encryption algorithm for the electronic file
  • the original contract data is encrypted to generate a data fingerprint;
  • a broadcasting module is used to broadcast the contract number corresponding to the original electronic contract and the data fingerprint in the blockchain network for information verification; an add module is used to When the information verification is successful, the contract number and the data fingerprint are added to the blockchain maintained by each node in the blockchain network; wherein, the contract number is used to download from the blockchain network
  • the data fingerprint is queried in the blockchain maintained by each node.
  • an electronic device includes: a processor; a memory, where a computer program is stored, and when the computer program is executed by the processor, the above method is implemented.
  • a computer non-volatile readable storage medium stores a computer program, and when the computer program is executed by a computer, the computer executes the above method.
  • the blockchain-based electronic contract storage method includes the following steps: obtaining the original electronic contract uploaded to the blockchain network; the original electronic contract is the electronic contract obtained by synthesizing the electronic contract and the electronic signature data of the signatory. Documents; preprocess the original electronic contract to obtain the original electronic contract data; use the preset encryption algorithm to encrypt the original electronic contract data to generate data fingerprints; broadcast the contract number and the corresponding original electronic contract in the blockchain network Data fingerprint for information verification; if the verification is successful, add the contract number and data fingerprint to the blockchain maintained by each node in the blockchain network; among them, the contract number is used to maintain each node in the blockchain network. Query the data fingerprint in the blockchain.
  • Figure 1 is a schematic structural diagram of a device disclosed in an embodiment of the present invention.
  • FIG. 2 is a flowchart of a method for storing electronic contracts based on blockchain disclosed in an embodiment of the present invention
  • FIG. 3 is a flowchart of another blockchain-based electronic contract storage method disclosed in an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of a blockchain-based electronic contract storage device disclosed in an embodiment of the present invention.
  • Fig. 5 is a schematic structural diagram of another block chain-based electronic contract storage device disclosed in an embodiment of the present invention.
  • the implementation environment of the present invention may be an electronic device, such as a smart phone, a tablet computer, and a desktop computer.
  • Fig. 1 is a schematic structural diagram of a device disclosed in an embodiment of the present invention.
  • the apparatus 100 may be the aforementioned electronic device.
  • the device 100 may include one or more of the following components: a processing component 102, a memory 104, a power supply component 106, a multimedia component 108, an audio component 110, a sensor component 114, and a communication component 116.
  • the processing component 102 generally controls the overall operations of the device 100, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations.
  • the processing component 102 may include one or more processors 118 to execute instructions to complete all or part of the steps of the following method.
  • the processing component 102 may include one or more modules to facilitate the interaction between the processing component 102 and other components.
  • the processing component 102 may include a multimedia module to facilitate the interaction between the multimedia component 108 and the processing component 102.
  • the memory 104 is configured to store various types of data to support operations in the device 100. Examples of these data include instructions for any application or method operating on the device 100.
  • the memory 104 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as a static random access memory (Static Random Access Memory). Access Memory, SRAM for short), electrically erasable programmable read-only memory (Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read Only Memory (EPROM), Programmable Read-Only Memory (EPROM) Red-Only Memory, PROM for short), Read-Only Memory (ROM for short), magnetic memory, flash memory, magnetic disk or optical disk.
  • the memory 104 also stores one or more modules, and the one or more modules are configured to be executed by the one or more processors 118 to complete all or part of the steps in the method shown below.
  • the power supply component 106 provides power to various components of the device 100.
  • the power supply component 106 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the device 100.
  • the multimedia component 108 includes a screen that provides an output interface between the device 100 and the user.
  • the screen may include a liquid crystal display (Liquid Crystal Display, referred to as LCD) and touch panel. If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from the user.
  • the touch panel includes one or more touch sensors to sense touch, sliding, and gestures on the touch panel. The touch sensor can not only sense the boundary of the touch or slide action, but also detect the duration and pressure associated with the touch or slide operation.
  • the screen may also include an organic electroluminescence display (Organic Light Emitting Display, OLED for short).
  • the audio component 110 is configured to output and/or input audio signals.
  • the audio component 110 includes a microphone (Microphone, MIC for short).
  • the microphone is configured to receive an external audio signal.
  • the received audio signal can be further stored in the memory 104 or sent via the communication component 116.
  • the audio component 110 further includes a speaker for outputting audio signals.
  • the sensor component 114 includes one or more sensors for providing the device 100 with various aspects of state evaluation.
  • the sensor component 114 can detect the open/close state of the device 100 and the relative positioning of components.
  • the sensor component 114 can also detect the position change of the device 100 or a component of the device 100 and the temperature change of the device 100.
  • the sensor component 114 may also include a magnetic sensor, a pressure sensor or a temperature sensor.
  • the communication component 116 is configured to facilitate wired or wireless communication between the apparatus 100 and other devices.
  • the device 100 can access a wireless network based on a communication standard, such as WiFi (Wireless-Fidelity, wireless fidelity).
  • WiFi Wireless-Fidelity, wireless fidelity
  • the communication component 116 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel.
  • the communication component 116 further includes a near field communication (Near Field Communication, NFC for short) module to facilitate short-range communication.
  • NFC Near Field Communication
  • the NFC module can be based on radio frequency identification (Radio Frequency Identification, referred to as RFID) technology, infrared data association (Infrared Data Association, referred to as IrDA) technology, ultra-wideband (Ultra Wideband, referred to as UWB) technology, Bluetooth technology and other technologies.
  • RFID Radio Frequency Identification
  • IrDA Infrared Data Association
  • UWB ultra-wideband
  • Bluetooth Bluetooth technology and other technologies.
  • the apparatus 100 may be implemented by one or more application specific integrated circuits (Application Specific Integrated Circuits). Specific Integrated Circuit, referred to as ASIC), digital signal processor, digital signal processing equipment, programmable logic device, field programmable gate array, controller, microcontroller, microprocessor or other electronic components to implement the following method.
  • ASIC Application Specific Integrated Circuit
  • digital signal processor digital signal processing equipment
  • programmable logic device programmable logic device
  • field programmable gate array programmable gate array
  • controller microcontroller
  • microprocessor microprocessor or other electronic components to implement the following method.
  • FIG. 2 is a schematic flowchart of a method for storing electronic contracts based on a blockchain disclosed in an embodiment of the present invention.
  • the blockchain-based electronic contract storage method is suitable for electronic contract storage devices or electronic equipment, and may include the following steps:
  • the original electronic contract uploaded to the blockchain network;
  • the original electronic contract is an electronic document obtained by synthesizing the electronic contract and the electronic signature data of the signatory.
  • the contract type of the original electronic contract may include, but is not limited to, a sales contract, a gift contract, a loan contract, a lease contract, a construction project contract, a transportation contract, an intermediary contract, etc.
  • the preprocessing of the original electronic contract is used to remove the irrelevant text content of the original electronic contract (such as punctuation marks, comments, half-width spaces, full-width spaces, tab blank lines, identifiers, etc.), and reduce subsequent Impact on the similarity determination of data fingerprints.
  • Step 202 may specifically include the following steps:
  • the text data is extracted from the original electronic contract, and irrelevant text content included in the text data is removed according to the encoding format of the original electronic contract to obtain the original electronic contract data.
  • a text extraction model can also be used to extract text data from the original electronic contract.
  • the text extraction model is obtained by training the deep neural network using the electronic contract document sample and the corresponding text data sample.
  • the preset encryption algorithm is one of the SHA1 algorithm, the SHA256 algorithm, the MD5 algorithm, and the Rabin fingerprint algorithm.
  • the original electronic contract data is compressed into a fixed-length binary string using a preset encryption algorithm.
  • the binary string can be used as a data fingerprint.
  • the data fingerprint is uniquely identifiable, and the original electronic contract data cannot be inversely calculated. Due to the encryption processing, different data content will produce different data fingerprints. Therefore, it is possible to determine whether the original electronic contract data has been tampered based on the generated data fingerprints.
  • step 204 may specifically include the following steps:
  • the contract number and data fingerprint can be packaged using the encryption parameters agreed by the blockchain network to obtain the packaged result.
  • all nodes in the blockchain network store decryption parameters that match the encryption parameters.
  • Each node in the blockchain network uses the aforementioned decryption parameters to unpack the packaging result. If the unpacking is successful, it means that the packaging result broadcast in the blockchain network is credible, and it can be determined that the packaging result verification is successful. It can be seen that the optional implementation method is implemented.
  • the contract number and data fingerprint corresponding to the original electronic contract need to be verified and confirmed by all nodes in the blockchain network before they can be officially added to the blockchain maintained by each node, which can guarantee The reliability of data sources improves the feasibility of data sharing.
  • each node included in the blockchain network may correspond to different participants in electronic contract transactions.
  • Participants in electronic contract transactions can be electronic devices, and have one or more of the electronic contract upload authority, electronic contract verification authority, and electronic contract inquiry authority according to the authorized business type (including electronic contract upload, verification, and query) .
  • the original electronic contract can be stored in a local database connected to the node server that uploads the original electronic contract, or the original electronic contract can be uploaded to a third-party security system for storage, so that the data fingerprint is separated from the original electronic contract Storage, no need to disclose the original electronic contract.
  • the data fingerprints it is only necessary to derive the stored original electronic contract from the corresponding local database or a third-party security system.
  • the implementation of the method described in Figure 2 can obtain data fingerprints by encrypting the original electronic contract, and store the data fingerprints in the blockchain. Based on the easy storage of data fingerprints, the original electronic contract can be prevented from being disclosed and improved The confidentiality of the original electronic contract; in addition, based on the non-editable modification of the blockchain and the data fingerprint, it can also prevent the original data of the electronic contract corresponding to the data fingerprint from being tampered with, and ensure the authenticity and reliability of the data fingerprint.
  • FIG. 3 is a schematic flowchart of another method for storing electronic contracts based on a blockchain disclosed in an embodiment of the present invention.
  • the blockchain-based electronic contract storage method may include the following steps:
  • Step 301 to step 303 among them, for the description of step 301 to step 303, please refer to the detailed description of step 201 to step 203 in the second embodiment, which will not be repeated in this embodiment of the present invention.
  • step 304 may include the following steps:
  • step 304 it may further include:
  • the contract number and data fingerprint are added to the blockchain maintained by the authorized node in the blockchain network.
  • the target block corresponding to each node is the newly constructed block in the blockchain maintained by each node, and the root hash value of the target block is stored in the target block by using the Merkel tree algorithm All the data obtained by calculation.
  • Each block includes a block header and a block body.
  • the block body stores a number of contract records and a binary Merkel tree composed of the hash value of each record.
  • Each contract record includes the contract number and corresponding
  • the block header generally includes the version number and the root hash value (hash pointer) of the previous data block connected to the data block.
  • the data items of the block header/body and the block chain structure (such as single chain and double chain structure) will be different. Therefore, in step 305, by associating the root hash value of the target block with the contract number, the target block storing the contract number and the corresponding data fingerprint can be quickly located in the blockchain according to the contract number, which improves The efficiency of data query.
  • step 307. According to the root hash value corresponding to the contract number, determine whether there is a block storing the contract number in the blockchain maintained by the query node; if so, perform step 308.
  • the query node If it does not exist, it means that the query node is not authorized to store the data fingerprint corresponding to the contract number, and a reply message indicating that unauthorized data cannot be queried is returned to the query node.
  • step 308 the following steps may be further included:
  • implementing an optional implementation method to encrypt the original electronic contract to be verified by using the same encryption algorithm as when generating the data fingerprint to generate the data fingerprint to be verified can be based on the non-editable modification of the data in the blockchain.
  • the data fingerprint stored in the blockchain is matched with the data fingerprint to be verified for similarity, so as to determine the authenticity of the original electronic contract to be verified.
  • the stored data fingerprint can be quickly retrieved in the blockchain maintained by the query node according to the contract number.
  • FIG. 4 is a schematic structural diagram of a blockchain-based electronic contract storage device disclosed in an embodiment of the present invention.
  • the blockchain-based electronic contract storage device may include: a first acquisition module 401, a first processing module 402, a first encryption module 403, a broadcasting module 404, and an adding module 405, where:
  • the first obtaining module 401 is used to obtain the original electronic contract uploaded to the blockchain network; the original electronic contract is an electronic document obtained by synthesizing the electronic contract and the electronic signature data of the signatory.
  • the first processing module 402 is used to preprocess the original electronic contract to obtain original electronic contract data.
  • the first encryption module 403 is configured to perform encryption processing on the original data of the electronic contract using a preset encryption algorithm to generate a data fingerprint.
  • the preset encryption algorithm is one of the SHA1 algorithm, the SHA256 algorithm, the MD5 algorithm, and the Rabin fingerprint algorithm.
  • the broadcasting module 404 is used for broadcasting the contract number and data fingerprint corresponding to the original electronic contract in the blockchain network for information verification.
  • the broadcasting module 404 is configured to broadcast the contract number and data fingerprint corresponding to the original electronic contract in the blockchain network for information verification.
  • the specific method is as follows:
  • the broadcast module 404 is used to package the contract number and data fingerprint corresponding to the original electronic contract according to the packaging rules of the blockchain network to obtain the packaging result; and broadcast the packaging result in the blockchain network for information verification; And, when the notification that all nodes in the blockchain network broadcast after the successful unpacking and packaging result is detected, it is determined that the information verification is successful.
  • the adding module 405 is used to add the contract number and data fingerprint to the block chain maintained by each node in the blockchain network when the information verification is successful; among them, the contract number is used to remove the contract number from each node in the block chain network.
  • the data fingerprint is queried in the maintained blockchain.
  • the original electronic contract can be stored in a local database connected to the node server that uploads the original electronic contract, or the original electronic contract can be uploaded to a third-party security system for storage, so that the data fingerprint is separated from the original electronic contract Storage, no need to disclose the original electronic contract.
  • the implementation of the device described in Figure 4 can obtain data fingerprints by encrypting the original electronic contract, and store the data fingerprints on the blockchain. Based on the easy storage of the data fingerprints, the original electronic contract can be prevented from being disclosed and improved The confidentiality of the original electronic contract; in addition, based on the non-editable modification of the blockchain and the data fingerprint, it can also prevent the original data of the electronic contract corresponding to the data fingerprint from being tampered with, and ensure the authenticity and reliability of the data fingerprint.
  • FIG. 5 is a schematic structural diagram of another block chain-based electronic contract storage device disclosed in an embodiment of the present invention.
  • the block chain-based electronic contract storage device shown in FIG. 5 is optimized by the block chain-based electronic contract storage device shown in FIG. 4.
  • the blockchain-based electronic contract storage device shown in FIG. 5 further includes a second acquisition module 406, a first judgment module 407, and an extraction module 408. among them:
  • the adding module 405 is used to add the contract number and data fingerprint to the blockchain maintained by each node in the blockchain network when the information verification is successful, specifically as follows:
  • the adding module 405 is used to add the contract number and data fingerprint to the target block of the blockchain maintained by each node in the blockchain network when the information verification is successful, and the root of the target block corresponding to each node
  • the hope value is stored in association with the contract number; among them, the target block corresponding to each node is the newly constructed block in the blockchain maintained by each node, and the root hash value of the target block is calculated by using the Merkel tree algorithm. All data stored in the target block is obtained by calculation.
  • the second obtaining module 406 is used to obtain the root hash value corresponding to the contract number when the query request issued by the query node in the blockchain network for the contract number is detected; wherein, the query node is any one in the blockchain network node.
  • the first judgment module 407 is used to judge whether there is a block storing the contract number in the blockchain maintained by the query node according to the root hash value corresponding to the contract number.
  • the extraction module 408 is used for determining that there is a block storing the contract number in the blockchain maintained by the query node in the first determining module 407, and extracting the contract number and data from the block storing the contract number according to the contract number Fingerprint; and, return the data fingerprint to the query node.
  • the device may further include:
  • the third obtaining module is used to obtain the original electronic contract to be verified uploaded by the query node after the extraction module 408 extracts the contract number and data fingerprint from the blockchain maintained by the query node according to the contract number;
  • the second processing module is used to preprocess the original electronic contract to be verified to obtain the original data of the electronic contract to be verified;
  • the second encryption module is configured to encrypt the original data of the electronic contract to be verified by using a preset encryption algorithm to generate a data fingerprint to be verified;
  • the second judgment module is used to judge whether the data fingerprint to be verified is consistent with the above data fingerprint
  • the marking module is used for determining that the original electronic contract to be verified has been tampered when the data fingerprint to be verified is inconsistent with the above data fingerprint, and marking the original electronic contract to be verified as an invalid electronic contract.
  • the broadcasting module 404 includes:
  • the packaging sub-module 4041 is used to package the contract number and data fingerprint corresponding to the original electronic contract according to the packaging rules of the blockchain network to obtain the packaging result;
  • the encryption submodule 4042 is used to package the contract number and data fingerprint corresponding to the original electronic contract according to the packaging rules of the blockchain network in the packaging submodule 4041 to obtain the encryption key according to the contract number after obtaining the packaging result; Wherein, the encryption key and the decryption key corresponding to the encryption key are shared by authorized nodes corresponding to the contract number; and the encryption key is used to encrypt the packaging result;
  • the broadcast sub-module 4043 is used to broadcast the encrypted packaging result in the blockchain network for information verification.
  • the adding module 405 is used to add the contract number and data fingerprint to the blockchain maintained by each node in the blockchain network when the information verification is successful, specifically as follows:
  • the adding module 405 is used to determine that the information verification is successful when it detects that the authorized node in the blockchain network has successfully decrypted and unpacked the encrypted packaging result by using the decryption key stored in it.
  • the contract number and data fingerprint are added to the blockchain maintained by authorized nodes in the blockchain network.
  • the implementation of the device described in Figure 5 can obtain data fingerprints by encrypting the original electronic contract, and store the data fingerprints on the blockchain.
  • the original electronic contract can be prevented from being disclosed and improved The confidentiality of the original electronic contract; in addition, based on the non-editable modification of the blockchain and the data fingerprint, it can also prevent the original data of the electronic contract corresponding to the data fingerprint from being tampered with, ensuring the authenticity of the data fingerprint, and then being able to use the
  • the data fingerprint in the blockchain is matched with the data fingerprint to be verified to determine the authenticity of the original electronic contract to be verified; further, according to the contract number corresponding to the original electronic contract, the designated authorized node is assigned as The right encryption key and decryption key enable only authorized nodes in the blockchain network to verify the packaging results corresponding to the original electronic contract, and add the successfully verified contract number and data fingerprint to the blockchain maintained by the authorized node It can ensure the privacy of the content of the electronic contract; further, by associating the root has
  • the present invention also provides an electronic device, which includes:
  • a memory where computer-readable instructions are stored, and when the computer-readable instructions are executed by the processor, the block chain-based electronic contract storage method as shown above is realized.
  • the electronic device may be the apparatus 100 shown in FIG. 1.
  • the present invention also provides a computer-readable storage medium on which a computer program is stored.
  • the computer program When the computer program is executed by a processor, it realizes the blockchain-based electronic contract storage as shown above. method.

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Abstract

本申请涉及区块链技术领域,揭示了一种基于区块链的电子合同存储方法、装置、电子设备及计算机非易失性可读存储介质。该方法包括:获取上传至区块链网络的电子合同原件,电子合同原件是通过合成电子合同和签署人的电子签名数据后得到的电子文件;对电子合同原件进行预处理,以获得电子合同原件数据;利用预设加密算法对电子合同原件数据进行加密处理以生成数据指纹;在区块链网络中广播电子合同原件对应的合同编号和数据指纹以进行信息验证;若信息验证成功,将合同编号和数据指纹添加至区块链网络中各个节点各自维护的区块链中,能够避免电子合同原件被公开,提高电子合同原件的保密性,还能够避免数据指纹对应的电子合同原件数据被纂改,保证数据指纹的真实可靠性。

Description

基于区块链的电子合同存储方法、装置、电子设备及计算机非易失性可读存储介质 技术领域
本申请要求2019年5月24日递交、发明名称为“基于区块链的电子合同存储方法及装置、电子设备”的中国专利申请201910442134.1的优先权,在此通过引用将其全部内容合并于此。
本申请涉及区块链技术领域,尤其涉及一种基于区块链的电子合同存储方法、装置、电子设备及计算机非易失性可读存储介质。
背景技术
电子合同是通过电子信息网络以电子形式签订的一种电子协议,用于明确双方或多方当事人之间的权利义务关系。随着电子技术的发展,电子合同以其传输方便和节约成本等特点,在电子商务活动中占据一席之地。为了更好地利用电子合同来保障消费者以及经营者的合法权益,妥善安全地保存电子合同是维护个人以及企业信息安全的重要环节。
当前保存电子合同的方法主要是通过合成电子合同和签署人的电子签名数据,将合成得到的电子合同文件保存在磁盘中。
技术问题
然而,本申请的发明人意识到,这种保存方式无法防止有人恶意将电子签名数据合成到非法的电子合同上,带来了伪造电子合同文件的隐患。
技术解决方案
为了解决上述技术问题,本申请的一个目的在于提供一种基于区块链的电子合同存储方法、装置、电子设备及计算机非易失性可读存储介质。
其中,本申请所采用的技术方案为:
第一方面,一种基于区块链的电子合同存储方法,包括:获取上传至区块链网络的电子合同原件;所述电子合同原件是通过合成电子合同和签署人的电子签名数据后得到的电子文件;对所述电子合同原件进行预处理,以获得电子合同原件数据;利用预设加密算法对所述电子合同原件数据进行加密处理以生成数据指纹;在所述区块链网络中广播所述电子合同原件对应的合同编号和所述数据指纹以进行信息验证;若信息验证成功,将所述合同编号和所述数据指纹添加至所述区块链网络中各个节点各自维护的区块链中;其中,所述合同编号用于从所述区块链网络中各个节点各自维护的区块链中查询出所述数据指纹。
第二方面,一种基于区块链的电子合同存储装置,包括:第一获取模块,用于获取上传至区块链网络的电子合同原件;所述电子合同原件是通过合成电子合同和签署人的电子签名数据后得到的电子文件;第一处理模块,用于对所述电子合同原件进行预处理,以获得电子合同原件数据;第一加密模块,用于利用预设加密算法对所述电子合同原件数据进行加密处理以生成数据指纹;广播模块,用于在所述区块链网络中广播所述电子合同原件对应的合同编号和所述数据指纹以进行信息验证;添加模块,用于在信息验证成功时,将所述合同编号和所述数据指纹添加至所述区块链网络中各个节点各自维护的区块链中;其中,所述合同编号用于从所述区块链网络中各个节点各自维护的区块链中查询出所述数据指纹。
第三方面,一种电子设备,包括:处理器;存储器,所述存储器上存储有计算机程序,所述计算机程序被所述处理器执行时,实现如上的方法。
第四方面,一种计算机非易失性可读存储介质,其存储有计算机程序,当所述计算机程序被计算机执行时,使计算机执行如上的方法。
在上述技术方案中,基于区块链的电子合同存储方法包括如下步骤:获取上传至区块链网络的电子合同原件;电子合同原件是通过合成电子合同和签署人的电子签名数据后得到的电子文件;对电子合同原件进行预处理,以获得电子合同原件数据;利用预设加密算法对电子合同原件数据进行加密处理以生成数据指纹;在区块链网络中广播电子合同原件对应的合同编号和数据指纹以进行信息验证;若验证成功,将合同编号和数据指纹添加至区块链网络中各个节点各自维护的区块链中;其中,合同编号用于从区块链网络中各个节点各自维护的区块链中查询出数据指纹。
有益效果
通过对电子合同原件进行加密处理,获得数据指纹,并将数据指纹存储至区块链,能够基于数据指纹易于保管的特点,避免电子合同原件被公开,提高电子合同原件的保密性;此外,基于区块链和数据指纹的不可纂改性,还能够避免数据指纹对应的电子合同原件数据被纂改,保证数据指纹的真实可靠性。
应当理解的是,以上的一般描述和后文的细节描述仅是示例性和解释性的,并不能限制本申请。
附图说明
图1是本发明实施例公开的一种装置的结构示意图;
图2是本发明实施例公开的一种基于区块链的电子合同存储方法的流程图;
图3是本发明实施例公开的另一种基于区块链的电子合同存储方法的流程图;
图4是本发明实施例公开的一种基于区块链的电子合同存储装置的结构示意图;
图5是本发明实施例公开的另一种基于区块链的电子合同存储装置的结构示意图。
本发明的实施方式
这里将详细地对示例性实施例执行说明,其示例表示在附图中。下面的描述涉及附图时,除非另有表示,不同附图中的相同数字表示相同或相似的要素。以下示例性实施例中所描述的实施方式并不代表与本发明相一致的所有实施方式。相反,它们仅是与如所附权利要求书中所详述的、本发明的一些方面相一致的装置和方法的例子。
 
实施例一
本发明的实施环境可以是电子设备,例如智能手机、平板电脑、台式电脑。
图1是本发明实施例公开的一种装置的结构示意图。装置100可以是上述电子设备。如图1所示,装置100可以包括以下一个或多个组件:处理组件102,存储器104,电源组件106,多媒体组件108,音频组件110,传感器组件114以及通信组件116。
处理组件102通常控制装置100的整体操作,诸如与显示,电话呼叫,数据通信,相机操作以及记录操作相关联的操作等。处理组件102可以包括一个或多个处理器118来执行指令,以完成下述的方法的全部或部分步骤。此外,处理组件102可以包括一个或多个模块,用于便于处理组件102和其他组件之间的交互。例如,处理组件102可以包括多媒体模块,用于以方便多媒体组件108和处理组件102之间的交互。
存储器104被配置为存储各种类型的数据以支持在装置100的操作。这些数据的示例包括用于在装置100上操作的任何应用程序或方法的指令。存储器104可以由任何类型的易失性或非易失性存储设备或者它们的组合实现,如静态随机存取存储器(Static Random Access Memory,简称SRAM),电可擦除可编程只读存储器(Electrically Erasable Programmable Read-Only Memory,简称EEPROM),可擦除可编程只读存储器(Erasable Programmable Read Only Memory,简称EPROM),可编程只读存储器(Programmable Red-Only Memory,简称PROM),只读存储器(Read-Only Memory,简称ROM),磁存储器,快闪存储器,磁盘或光盘。存储器104中还存储有一个或多个模块,用于该一个或多个模块被配置成由该一个或多个处理器118执行,以完成如下所示方法中的全部或者部分步骤。
电源组件106为装置100的各种组件提供电力。电源组件106可以包括电源管理系统,一个或多个电源,及其他与为装置100生成、管理和分配电力相关联的组件。
多媒体组件108包括在装置100和用户之间的提供一个输出接口的屏幕。在一些实施例中,屏幕可以包括液晶显示器(Liquid Crystal Display,简称LCD)和触摸面板。如果屏幕包括触摸面板,屏幕可以被实现为触摸屏,以接收来自用户的输入信号。触摸面板包括一个或多个触摸传感器以感测触摸、滑动和触摸面板上的手势。触摸传感器可以不仅感测触摸或滑动动作的边界,而且还检测与触摸或滑动操作相关的持续时间和压力。屏幕还可以包括有机电致发光显示器(Organic Light Emitting Display,简称OLED)。
音频组件110被配置为输出和/或输入音频信号。例如,音频组件110包括一个麦克风(Microphone,简称MIC),当装置100处于操作模式,如呼叫模式、记录模式和语音识别模式时,麦克风被配置为接收外部音频信号。所接收的音频信号可以被进一步存储在存储器104或经由通信组件116发送。在一些实施例中,音频组件110还包括一个扬声器,用于输出音频信号。
传感器组件114包括一个或多个传感器,用于为装置100提供各个方面的状态评估。例如,传感器组件114可以检测到装置100的打开/关闭状态,组件的相对定位,传感器组件114还可以检测装置100或装置100一个组件的位置改变以及装置100的温度变化。在一些实施例中,该传感器组件114还可以包括磁传感器,压力传感器或温度传感器。
通信组件116被配置为便于装置100和其他设备之间有线或无线方式的通信。装置100可以接入基于通信标准的无线网络,如WiFi(Wireless-Fidelity,无线保真)。在本发明实施例中,通信组件116经由广播信道接收来自外部广播管理系统的广播信号或广播相关信息。在本发明实施例中,通信组件116还包括近场通信(Near Field Communication,简称NFC)模块,用于以促进短程通信。例如,在NFC模块可基于射频识别(Radio Frequency Identification,简称RFID)技术,红外数据协会(Infrared Data Association,简称IrDA)技术,超宽带(Ultra Wideband,简称UWB)技术,蓝牙技术和其他技术来实现。
在示例性实施例中,装置100可以被一个或多个应用专用集成电路(Application Specific Integrated Circuit,简称ASIC)、数字信号处理器、数字信号处理设备、可编程逻辑器件、现场可编程门阵列、控制器、微控制器、微处理器或其他电子元件实现,用于执行下述方法。
 
实施例二
请参阅图2,图2是本发明实施例公开的一种基于区块链的电子合同存储方法的流程示意图。如图2所示该基于区块链的电子合同存储方法适用于电子合同存储装置或者电子设备,可以包括以下步骤:
获取上传至区块链网络的电子合同原件;电子合同原件是通过合成电子合同和签署人的电子签名数据后得到的电子文件。
本发明实施例中,电子合同原件的合同类型可以包括但不限于买卖合同、赠与合同、借款合同、租赁合同、建设工程合同、运输合同和居间合同等。
对电子合同原件进行预处理,以获得电子合同原件数据。
本发明实施例中,对电子合同原件的预处理用于去除电子合同原件的无关文本内容(比如标点符号、注释、半角空格、全角空格、制表符空行、标识符等),减小后续对数据指纹的相似性判定的影响。步骤202具体可以包括以下步骤:
识别电子合同原件的编码格式;
从电子合同原件中提取出文本数据,并根据电子合同原件的编码格式,对文本数据中包括的无关文本内容进行去除,以获得电子合同原件数据。
其中,可以理解,不同的编码格式下,文本数据中无关文本内容所占的字节数不同,比如,在UTF-8编码下,全角空格占3个字节;而在Unicode和ANSI编码下,全角空格占2个字节,因此,需要根据电子合同文件的编码格式类型,对文本数据执行不同的无关文本内容去除方式。可选的,还可以利用文本提取模型从电子合同原件中提取出文本数据,文本提取模型是通过利用电子合同文件样本和相应的文本数据样本对深度神经网络进行训练后所获得的。
利用预设加密算法对电子合同原件数据进行加密处理以生成数据指纹。
本发明实施例中,预设加密算法为SHA1算法、SHA256算法、MD5算法及Rabin指纹算法中的其中一种加密算法。利用预设加密算法将电子合同原件数据压缩为固定长度的二进制串,该二进制串可以为作为数据指纹,数据指纹具有唯一标识性,且无法反推算出电子合同原件数据。由于经过加密处理,不同的数据内容会产生不同的数据指纹,因此,可以基于生成的数据指纹来判断电子合同原件数据是否被纂改。
在区块链网络中广播电子合同原件对应的合同编号和数据指纹以进行信息验证。
作为一种可选的实施方式,步骤204具体可以包括以下步骤:
依据区块链网络的打包规则,对电子合同原件对应的合同编号和数据指纹进行打包,以获得打包结果;
在区块链网络中广播打包结果以进行信息验证;
在检测到区块链网络中所有节点在成功解包打包结果后广播的通知时,判定出信息验证成功。
具体来说,可以利用区块链网络约定的加密参数对合同编号和数据指纹进行打包,获得打包结果。相应地,区块链网络中的所有节点存储有与加密参数匹配的解密参数。区块链网络中的各个节点利用上述解密参数对打包结果进行解包,若解包成功,说明在区块链网络中广播的打包结果是可信的,可以判定出打包结果验证成功。可见,实施可选的实施方式,电子合同原件对应的合同编号和数据指纹需要经过区块链网络中所有节点验证确认后才可被正式添加到每个节点维护的区块链中,这样能够保证数据来源的可靠性,提高数据共享的可行度。
若信息验证成功,将合同编号和数据指纹添加至区块链网络中各个节点各自维护的区块链中;合同编号用于从区块链网络中各个节点各自维护的区块链中查询出数据指纹。
本发明实施例中,区块链网络中包括的各个节点可以对应于不同的电子合同交易参与方。电子合同交易参与方可以为电子设备,根据被授权的业务类型(包括电子合同上传、验证以及查询),具有电子合同上传权限、电子合同验证权限以及电子合同查询权限中的一种或者多种权限。
可选的,可以将电子合同原件存储在与上传该电子合同原件的节点服务器相连接的本地数据库中,也可以将电子合同原件上传至第三方保全系统进行存储,使得数据指纹与电子合同原件分开存储,无需公开电子合同原件。在利用数据指纹判定电子合同原件的真伪性的场合,只需从相应的本地数据库或者第三方保全系统中导出已存储的电子合同原件即可。
可见,实施图2所描述的方法,通过对电子合同原件进行加密处理,获得数据指纹,并将数据指纹存储至区块链,能够基于数据指纹易于保管的特点,避免电子合同原件被公开,提高电子合同原件的保密性;此外,基于区块链和数据指纹的不可纂改性,还能够避免数据指纹对应的电子合同原件数据被纂改,保证数据指纹的真实可靠性。
 
实施例三
请参阅图3,图3是本发明实施例公开的另一种基于区块链的电子合同存储方法的流程示意图。如图3所示,该基于区块链的电子合同存储方法可以包括以下步骤:
步骤301~步骤303;其中,针对步骤301~步骤303的描述,请参照实施例二中针对步骤201~步骤203的详细描述,本发明实施例不再赘述。
在区块链网络中广播电子合同原件对应的合同编号和数据指纹以进行信息验证。
作为一种可选的实施方式,步骤304可以包括以下步骤:
依据区块链网络的打包规则,对电子合同原件对应的合同编号和数据指纹进行打包,以获得打包结果;
根据合同编号,获取加密密钥;加密密钥以及加密密钥对应的解密密钥为合同编号对应的授权节点所共有;
利用加密密钥对打包结果进行加密;
在区块链网络中广播加密后的打包结果以进行信息验证;
在检测到区块链网络中的授权节点在利用自身存储的解密密钥成功解密并且解包加密后的打包结果后广播的通知时,判定出信息验证成功。
以及,相应的,在步骤304之后,还可以包括:
若信息验证成功,将合同编号和数据指纹添加至区块链网络中授权节点维护的区块链中。
可以理解,基于电子合同内容的机密性,一些电子合同原件只会针对特定的授权节点公开。因此,需要根据不同的电子合同原件,指定可以对其打包结果进行验证的节点。实施上述可选的实施方式,根据电子合同原件对应的合同编号,为指定的授权节点分配成对的加密密钥以及解密密钥,使得只有区块链网络中的授权节点才可验证电子合同原件对应的打包结果,并将验证成功的合同编号和数据指纹添加到授权节点维护的区块链中,能够保障电子合同内容的私密性。
若信息验证成功,将合同编号和数据指纹添加至区块链网络中各个节点各自维护的区块链的目标区块中,将各个节点对应的目标区块的根哈希值与合同编号关联存储。
本发明实施例中,各个节点对应的目标区块为各个节点各自维护的区块链中最新构建的区块,目标区块的根哈希值是通过利用默克尔树算法对目标区块存储的所有数据进行运算所获得的。每个区块包括区块头和区块体,区块体保存的是若干合同记录以及由每条记录的哈希值构成的二叉默克尔树,其中,每条合同记录包括合同编号和相应的数据指纹,区块头一般包括版本号和与该数据区块连接的前一数据区块的根哈希值(哈希指针)等。根据不同的应用需求,区块头/体的数据项和区块链结构(例如单链和双链结构)也会有所不同。因此,步骤305中,通过将目标区块的根哈希值与合同编号关联存储,能够根据合同编号在区块链中快速定位出存储有合同编号以及相应的数据指纹的目标区块,提升了数据查询的效率。
306、若检测到区块链网络中查询节点针对合同编号发出的查询请求,获取与合同编号对应的根哈希值;查询节点为区块链网络中任意一节点。
307、根据与合同编号对应的根哈希值,判断查询节点维护的区块链中是否存在存储有合同编号的区块;若存在,执行步骤308。
若不存在,说明查询节点并未被授权存储该合同编号对应的数据指纹,则返回指示无法查询到非授权数据的回复信息给查询节点。
308、根据合同编号,从存储有合同编号的区块中提取出合同编号和数据指纹。
作为一种可选的实施方式,在步骤308之后,还可以包括以下步骤:
获取查询节点上传的待验证的电子合同原件;
对待验证的电子合同原件进行预处理,以获得待验证的电子合同原件数据;
利用预设加密算法对待验证的电子合同原件数据进行加密处理以生成待验证的数据指纹;
判断待验证的数据指纹与上述数据指纹是否一致;
若不一致,则判定出待验证的电子合同原件发生纂改,将待验证的电子合同原件标记为无效电子合同。
可见,实施可选的实施方式,通过利用与生成数据指纹时相同的加密算法对待验证的电子合同原件进行加密,生成待验证的数据指纹,能够基于区块链中数据的不可纂改性,利用存储在区块链中的数据指纹与待验证的数据指纹进行相似度匹配,从而判断出待验证的电子合同原件的真伪性。
309、将数据指纹返回查询节点。
可见,实施上述步骤306~步骤309,基于合同编号与区块的根哈希值之间的映射关系,能够根据合同编号在查询节点维护的区块链中快速检索出已存储的数据指纹。
可见,实施图3所描述的方法,通过对电子合同原件进行加密处理,获得数据指纹,并将数据指纹存储至区块链,能够基于数据指纹易于保管的特点,避免电子合同原件被公开,提高电子合同原件的保密性;此外,基于区块链和数据指纹的不可纂改性,还能够避免数据指纹对应的电子合同原件数据被纂改,保证数据指纹的真实可靠性,进而能够利用存储在区块链中的数据指纹与待验证的数据指纹进行相似度匹配,判断出待验证的电子合同原件的真伪性;进一步地,根据电子合同原件对应的合同编号,为指定的授权节点分配成对的加密密钥以及解密密钥,使得只有区块链网络中的授权节点才可验证电子合同原件对应的打包结果,并将验证成功的合同编号和数据指纹添加到授权节点维护的区块链中,能够保障电子合同内容的私密性;再进一步地,通过将区块链中存储有电子合同原件数据的目标区块的根哈希值与合同编号关联存储,能够根据合同编号在区块链中快速定位出存储有合同编号以及相应的数据指纹的目标区块,提升了数据查询的效率。
 
实施例四
请参阅图4,图4是本发明实施例公开的一种基于区块链的电子合同存储装置的结构示意图。如图4所示,该基于区块链的电子合同存储装置可以包括:第一获取模块401、第一处理模块402、第一加密模块403、广播模块404以及添加模块405,其中,
第一获取模块401,用于获取上传至区块链网络的电子合同原件;电子合同原件是通过合成电子合同和签署人的电子签名数据后得到的电子文件。
第一处理模块402,用于对电子合同原件进行预处理,以获得电子合同原件数据。
第一加密模块403,用于利用预设加密算法对电子合同原件数据进行加密处理以生成数据指纹。
本发明实施例中,预设加密算法为SHA1算法、SHA256算法、MD5算法及Rabin指纹算法中的其中一种加密算法。
广播模块404,用于在区块链网络中广播电子合同原件对应的合同编号和数据指纹以进行信息验证。
作为一种可选的实施方式,广播模块404用于在区块链网络中广播电子合同原件对应的合同编号和数据指纹以进行信息验证的方式具体为:
广播模块404,用于依据区块链网络的打包规则,对电子合同原件对应的合同编号和数据指纹进行打包,以获得打包结果;以及,在区块链网络中广播打包结果以进行信息验证;以及,在检测到区块链网络中所有节点在成功解包打包结果后广播的通知时,判定出信息验证成功。
添加模块405,用于在信息验证成功时,将合同编号和数据指纹添加至区块链网络中各个节点各自维护的区块链中;其中,合同编号用于从区块链网络中各个节点各自维护的区块链中查询出数据指纹。
可选的,可以将电子合同原件存储在与上传该电子合同原件的节点服务器相连接的本地数据库中,也可以将电子合同原件上传至第三方保全系统进行存储,使得数据指纹与电子合同原件分开存储,无需公开电子合同原件。在利用数据指纹判定电子合同原件的真伪性的场景,只需从相应的本地数据库或者第三方保全系统中导出已存储的电子合同原件即可。
可见,实施图4所描述的装置,通过对电子合同原件进行加密处理,获得数据指纹,并将数据指纹存储至区块链,能够基于数据指纹易于保管的特点,避免电子合同原件被公开,提高电子合同原件的保密性;此外,基于区块链和数据指纹的不可纂改性,还能够避免数据指纹对应的电子合同原件数据被纂改,保证数据指纹的真实可靠性。
 
实施例五
请参阅图5,图5是本发明实施例公开的另一种基于区块链的电子合同存储装置的结构示意图。图5所示的基于区块链的电子合同存储装置是由图4所示的基于区块链的电子合同存储装置进行优化得到的。与图4所示的基于区块链的电子合同存储装置相比较,图5所示的基于区块链的电子合同存储装置还包括第二获取模块406、第一判断模块407以及提取模块408,其中:
添加模块405用于在信息验证成功时,将合同编号和数据指纹添加至区块链网络中各个节点各自维护的区块链中的方式具体为:
添加模块405,用于在信息验证成功时,将合同编号和数据指纹添加至区块链网络中各个节点各自维护的区块链的目标区块中,将各个节点对应的目标区块的根哈希值与合同编号关联存储;其中,各个节点对应的目标区块为各个节点各自维护的区块链中最新构建的区块,目标区块的根哈希值是通过利用默克尔树算法对目标区块存储的所有数据进行运算所获得的。
第二获取模块406,用于在检测到区块链网络中查询节点针对合同编号发出的查询请求时,获取与合同编号对应的根哈希值;其中,查询节点为区块链网络中任意一节点。
第一判断模块407,用于根据与合同编号对应的根哈希值,判断查询节点维护的区块链中是否存在存储有合同编号的区块。
提取模块408,用于在第一判断模块407判定出查询节点维护的区块链中存在存储有合同编号的区块,根据合同编号,从存储有合同编号的区块中提取出合同编号和数据指纹;以及,将数据指纹返回查询节点。
作为一种可选的实施方式,该装置还可以包括:
第三获取模块,用于在提取模块408根据合同编号,从查询节点维护的区块链中提取出合同编号和数据指纹之后,获取查询节点上传的待验证的电子合同原件;
第二处理模块,用于对待验证的电子合同原件进行预处理,以获得待验证的电子合同原件数据;
第二加密模块,用于利用预设加密算法对待验证的电子合同原件数据进行加密处理以生成待验证的数据指纹;
第二判断模块,用于判断待验证的数据指纹与上述数据指纹是否一致;
标记模块,用于在待验证的数据指纹与上述数据指纹不一致时,判定出待验证的电子合同原件发生纂改,将待验证的电子合同原件标记为无效电子合同。
作为一种可选的实施方式,广播模块404,包括:
打包子模块4041,用于依据区块链网络的打包规则,对电子合同原件对应的合同编号和数据指纹进行打包,以获得打包结果;
加密子模块4042,用于在打包子模块4041依据区块链网络的打包规则,对电子合同原件对应的合同编号和数据指纹进行打包,以获得打包结果之后,根据合同编号,获取加密密钥;其中,加密密钥以及加密密钥对应的解密密钥为合同编号对应的授权节点所共有;以及,利用加密密钥对打包结果进行加密;
广播子模块4043,用于在区块链网络中广播加密后的打包结果以进行信息验证。
以及,相应的,添加模块405用于在信息验证成功时,将合同编号和数据指纹添加至区块链网络中各个节点各自维护的区块链中的方式具体为:
添加模块405,用于在检测到区块链网络中的授权节点在利用自身存储的解密密钥成功解密并且解包所述加密后的打包结果后广播的通知时,判定出信息验证成功,将合同编号和数据指纹添加至区块链网络中授权节点维护的区块链中。
可见,实施图5所描述的装置,通过对电子合同原件进行加密处理,获得数据指纹,并将数据指纹存储至区块链,能够基于数据指纹易于保管的特点,避免电子合同原件被公开,提高电子合同原件的保密性;此外,基于区块链和数据指纹的不可纂改性,还能够避免数据指纹对应的电子合同原件数据被纂改,保证数据指纹的真实可靠性,进而能够利用存储在区块链中的数据指纹与待验证的数据指纹进行相似度匹配,判断出待验证的电子合同原件的真伪性;进一步地,根据电子合同原件对应的合同编号,为指定的授权节点分配成对的加密密钥以及解密密钥,使得只有区块链网络中的授权节点才可验证电子合同原件对应的打包结果,并将验证成功的合同编号和数据指纹添加到授权节点维护的区块链中,能够保障电子合同内容的私密性;再进一步地,通过将区块链中存储有电子合同原件数据的目标区块的根哈希值与合同编号关联存储,能够根据合同编号在区块链中快速定位出存储有合同编号以及相应的数据指纹的目标区块,提升了数据查询的效率。
本发明还提供一种电子设备,该电子设备包括:
处理器;
存储器,该存储器上存储有计算机可读指令,该计算机可读指令被处理器执行时,实现如前所示的基于区块链的电子合同存储方法。
该电子设备可以是图1所示装置100。
在一示例性实施例中,本发明还提供一种计算机可读存储介质,其上存储有计算机程序,该计算机程序被处理器执行时,实现如前所示的基于区块链的电子合同存储方法。
应当理解的是,本发明并不局限于上面已经描述并在附图中示出的精确结构,并且可以在不脱离其范围执行各种修改和改变。本发明的范围仅由所附的权利要求来限制。

Claims (22)

  1. 基于区块链的电子合同存储方法,所述方法包括:
    获取上传至区块链网络的电子合同原件;所述电子合同原件是通过合成电子合同和签署人的电子签名数据后得到的电子文件;
    对所述电子合同原件进行预处理,以获得电子合同原件数据;
    利用预设加密算法对所述电子合同原件数据进行加密处理以生成数据指纹;
    在所述区块链网络中广播所述电子合同原件对应的合同编号和所述数据指纹以进行信息验证;
    若信息验证成功,将所述合同编号和所述数据指纹添加至所述区块链网络中各个节点各自维护的区块链中;
    其中,所述合同编号用于从所述区块链网络中各个节点各自维护的区块链中查询出所述数据指纹。
  2. 根据权利要求1所述的方法,其中,所述在所述区块链网络中广播所述电子合同原件对应的合同编号和所述数据指纹以进行信息验证,包括:     依据所述区块链网络的打包规则,对所述电子合同原件对应的合同编号和所述数据指纹进行打包,以获得打包结果;
    在所述区块链网络中广播所述打包结果以进行信息验证;
    在检测到所述区块链网络中所有节点在成功解包所述打包结果后广播的通知时,判定出信息验证成功。
  3. 根据权利要求2所述的方法,其中,所述依据所述区块链网络的打包规则,对所述电子合同原件对应的合同编号和所述数据指纹进行打包,以获得打包结果之后,所述方法还包括:
    根据所述合同编号,获取加密密钥;其中,所述加密密钥以及所述加密密钥对应的解密密钥为所述合同编号对应的授权节点所共有;
    利用所述加密密钥对所述打包结果进行加密;
    所述在所述区块链网络中广播所述打包结果以进行信息验证,包括:
    在所述区块链网络中广播加密后的打包结果以进行信息验证;
    所述在检测到所述区块链网络中所有节点在成功解包所述打包结果后广播的通知时,判定出信息验证成功,包括:
    在检测到所述区块链网络中的所述授权节点在利用自身存储的解密密钥成功解密并且解包所述加密后的打包结果后广播的通知时,判定出信息验证成功;
    所述将所述合同编号和所述数据指纹添加至所述区块链网络中各个节点各自维护的区块链中,包括:
    将所述合同编号和所述数据指纹添加至所述区块链网络中所述授权节点维护的区块链中。
  4. 根据权利要求1所述的方法,其中,所述将所述合同编号和所述数据指纹添加至所述区块链网络中各个节点各自维护的区块链中,包括:
    将所述合同编号和所述数据指纹添加至所述区块链网络中各个节点各自维护的区块链的目标区块中,将各个节点对应的目标区块的根哈希值与所述合同编号关联存储;其中,所述各个节点对应的目标区块为所述各个节点各自维护的区块链中最新构建的区块,所述目标区块的根哈希值是通过利用默克尔树算法对所述目标区块存储的所有数据进行运算所获得的。
  5. 根据权利要求4所述的方法,其中,所述方法还包括:
    若检测到所述区块链网络中查询节点针对所述合同编号发出的查询请求,获取与所述合同编号对应的根哈希值;其中,所述查询节点为所述区块链网络中任意一节点;
    根据与所述合同编号对应的根哈希值,判断所述查询节点维护的区块链中是否存在存储有所述合同编号的区块;
    若是,根据所述合同编号,从所述存储有所述合同编号的区块中提取出所述合同编号和所述数据指纹;
    将所述数据指纹返回所述查询节点。
  6. 根据权利要求5所述的方法,其中,在根据所述合同编号,从所述查询节点维护的区块链中提取出所述合同编号和所述数据指纹之后,所述方法还包括:
    获取所述查询节点上传的待验证的电子合同原件;
    对所述待验证的电子合同原件进行预处理,以获得待验证的电子合同原件数据;
    利用所述预设加密算法对所述待验证的电子合同原件数据进行加密处理以生成待验证的数据指纹;
    判断所述待验证的数据指纹与所述数据指纹是否一致;
    若不一致,则判定出所述待验证的电子合同原件发生纂改,将所述待验证的电子合同原件标记为无效电子合同。
  7. 根据权利要求1~6任一项所述的方法,其中,所述预设加密算法为SHA1算法、SHA256算法、MD5算法及Rabin指纹算法中的其中一种加密算法。
  8. 基于区块链的电子合同存储装置,所述装置包括:
    第一获取模块,用于获取上传至区块链网络的电子合同原件;所述电子合同原件是通过合成电子合同和签署人的电子签名数据后得到的电子文件;
    第一处理模块,用于对所述电子合同原件进行预处理,以获得电子合同原件数据;
    第一加密模块,用于利用预设加密算法对所述电子合同原件数据进行加密处理以生成数据指纹;
    广播模块,用于在所述区块链网络中广播所述电子合同原件对应的合同编号和所述数据指纹以进行信息验证;
    添加模块,用于在信息验证成功时,将所述合同编号和所述数据指纹添加至所述区块链网络中各个节点各自维护的区块链中;其中,所述合同编号用于从所述区块链网络中各个节点各自维护的区块链中查询出所述数据指纹。
  9. 根据权利要求8所述的装置,所述广播模块包括:
    打包子模块,被配置为依据所述区块链网络的打包规则,对所述电子合同原件对应的合同编号和所述数据指纹进行打包,以获得打包结果;
    加密子模块,被配置为在所述区块链网络中广播所述打包结果以进行信息验证;
    广播子模块,被配置为在检测到所述区块链网络中所有节点在成功解包所述打包结果后广播的通知时,判定出信息验证成功。
  10. 根据权利要求9所述的装置,所述广播模块被配置为:
    根据所述合同编号,获取加密密钥;其中,所述加密密钥以及所述加密密钥对应的解密密钥为所述合同编号对应的授权节点所共有;
    利用所述加密密钥对所述打包结果进行加密;
    所述在所述区块链网络中广播所述打包结果以进行信息验证,包括:
    在所述区块链网络中广播加密后的打包结果以进行信息验证;
    所述在检测到所述区块链网络中所有节点在成功解包所述打包结果后广播的通知时,判定出信息验证成功,包括:
    在检测到所述区块链网络中的所述授权节点在利用自身存储的解密密钥成功解密并且解包所述加密后的打包结果后广播的通知时,判定出信息验证成功;
    所述将所述合同编号和所述数据指纹添加至所述区块链网络中各个节点各自维护的区块链中,包括:
    将所述合同编号和所述数据指纹添加至所述区块链网络中所述授权节点维护的区块链中。
  11. 根据权利要求8所述的装置,所述添加模块被配置为:
    将所述合同编号和所述数据指纹添加至所述区块链网络中各个节点各自维护的区块链的目标区块中,将各个节点对应的目标区块的根哈希值与所述合同编号关联存储;其中,所述各个节点对应的目标区块为所述各个节点各自维护的区块链中最新构建的区块,所述目标区块的根哈希值是通过利用默克尔树算法对所述目标区块存储的所有数据进行运算所获得的。
  12. 根据权利要求11所述的装置,还包括:
    第二获取模块,被配置为若检测到所述区块链网络中查询节点针对所述合同编号发出的查询请求,获取与所述合同编号对应的根哈希值;其中,所述查询节点为所述区块链网络中任意一节点;
    第一判断模块,被配置为根据与所述合同编号对应的根哈希值,判断所述查询节点维护的区块链中是否存在存储有所述合同编号的区块;
    提取模块,被配置为若是,根据所述合同编号,从所述存储有所述合同编号的区块中提取出所述合同编号和所述数据指纹;将所述数据指纹返回所述查询节点。
  13. 根据权利要求12所述的装置,还包括:
    第三获取模块,被配置为获取所述查询节点上传的待验证的电子合同原件;
    第二处理模块,被配置为对所述待验证的电子合同原件进行预处理,以获得待验证的电子合同原件数据;
    第二加密模块,被配置为利用所述预设加密算法对所述待验证的电子合同原件数据进行加密处理以生成待验证的数据指纹;
    第二判断模块,被配置为判断所述待验证的数据指纹与所述数据指纹是否一致;
    标记模块,被配置为若不一致,则判定出所述待验证的电子合同原件发生纂改,将所述待验证的电子合同原件标记为无效电子合同。
  14. 根据权利要求7~13任一项所述的装置,其中,所述预设加密算法为SHA1算法、SHA256算法、MD5算法及Rabin指纹算法中的其中一种加密算法。
  15. 一种电子设备,包括:处理器;
    存储器,所述存储器上存储有计算机程序,所述计算机程序被所述处理器执行时执行以下处理:
    获取上传至区块链网络的电子合同原件;所述电子合同原件是通过合成电子合同和签署人的电子签名数据后得到的电子文件;
    对所述电子合同原件进行预处理,以获得电子合同原件数据;
    利用预设加密算法对所述电子合同原件数据进行加密处理以生成数据指纹;
    在所述区块链网络中广播所述电子合同原件对应的合同编号和所述数据指纹以进行信息验证;
    若信息验证成功,将所述合同编号和所述数据指纹添加至所述区块链网络中各个节点各自维护的区块链中;
    其中,所述合同编号用于从所述区块链网络中各个节点各自维护的区块链中查询出所述数据指纹。
  16. 根据权利要求15所述的电子设备,其中,所述在所述区块链网络中广播所述电子合同原件对应的合同编号和所述数据指纹以进行信息验证,包括:     依据所述区块链网络的打包规则,对所述电子合同原件对应的合同编号和所述数据指纹进行打包,以获得打包结果;
    在所述区块链网络中广播所述打包结果以进行信息验证;
    在检测到所述区块链网络中所有节点在成功解包所述打包结果后广播的通知时,判定出信息验证成功。
  17. 根据权利要求16所述的电子设备,其中,所述依据所述区块链网络的打包规则,对所述电子合同原件对应的合同编号和所述数据指纹进行打包,以获得打包结果之后,所述方法还包括:
    根据所述合同编号,获取加密密钥;其中,所述加密密钥以及所述加密密钥对应的解密密钥为所述合同编号对应的授权节点所共有;
    利用所述加密密钥对所述打包结果进行加密;
    所述在所述区块链网络中广播所述打包结果以进行信息验证,包括:
    在所述区块链网络中广播加密后的打包结果以进行信息验证;
    所述在检测到所述区块链网络中所有节点在成功解包所述打包结果后广播的通知时,判定出信息验证成功,包括:
    在检测到所述区块链网络中的所述授权节点在利用自身存储的解密密钥成功解密并且解包所述加密后的打包结果后广播的通知时,判定出信息验证成功;
    所述将所述合同编号和所述数据指纹添加至所述区块链网络中各个节点各自维护的区块链中,包括:
    将所述合同编号和所述数据指纹添加至所述区块链网络中所述授权节点维护的区块链中。
  18. 根据权利要求15所述的电子设备,其中,所述将所述合同编号和所述数据指纹添加至所述区块链网络中各个节点各自维护的区块链中,包括:
    将所述合同编号和所述数据指纹添加至所述区块链网络中各个节点各自维护的区块链的目标区块中,将各个节点对应的目标区块的根哈希值与所述合同编号关联存储;其中,所述各个节点对应的目标区块为所述各个节点各自维护的区块链中最新构建的区块,所述目标区块的根哈希值是通过利用默克尔树算法对所述目标区块存储的所有数据进行运算所获得的。
  19. 根据权利要求18所述的电子设备,其中,还包括:
    若检测到所述区块链网络中查询节点针对所述合同编号发出的查询请求,获取与所述合同编号对应的根哈希值;其中,所述查询节点为所述区块链网络中任意一节点;
    根据与所述合同编号对应的根哈希值,判断所述查询节点维护的区块链中是否存在存储有所述合同编号的区块;
    若是,根据所述合同编号,从所述存储有所述合同编号的区块中提取出所述合同编号和所述数据指纹;
    将所述数据指纹返回所述查询节点。
  20. 根据权利要求19所述的电子设备,其中,在根据所述合同编号,从所述查询节点维护的区块链中提取出所述合同编号和所述数据指纹之后,所述方法还包括:
    获取所述查询节点上传的待验证的电子合同原件;
    对所述待验证的电子合同原件进行预处理,以获得待验证的电子合同原件数据;
    利用所述预设加密算法对所述待验证的电子合同原件数据进行加密处理以生成待验证的数据指纹;
    判断所述待验证的数据指纹与所述数据指纹是否一致;
    若不一致,则判定出所述待验证的电子合同原件发生纂改,将所述待验证的电子合同原件标记为无效电子合同。
  21. 根据权利要求15~20任一项所述的电子设备,其中,所述预设加密算法为SHA1算法、SHA256算法、MD5算法及Rabin指纹算法中的其中一种加密算法。
  22. 一种计算机非易失性可读存储介质,其存储有计算机程序,当所述计算机程序被计算机执行时,使计算机执行权利要求1至6任一项所述的方法。
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