CN109409876A - Electronic contract signature method, apparatus, equipment and storage medium based on block chain - Google Patents
Electronic contract signature method, apparatus, equipment and storage medium based on block chain Download PDFInfo
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- CN109409876A CN109409876A CN201811136758.2A CN201811136758A CN109409876A CN 109409876 A CN109409876 A CN 109409876A CN 201811136758 A CN201811136758 A CN 201811136758A CN 109409876 A CN109409876 A CN 109409876A
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Abstract
The invention discloses a kind of, and the electronic contract based on block chain signs method, apparatus, equipment and storage medium.This method comprises: signing application in response to the contract of user terminal triggering, the user information of user terminal uploads, the identification code of credit agency and loan transaction type are obtained；The electronic contract template with loan transaction type matching is searched in the electronic contract template library prestored, and the matched credit agency's information of identification code with credit agency is searched in the credit agency's information bank prestored；By user information and credit agency's information input into electronic contract template, electronic contract to be encrypted is obtained；Based on block chain, treats encrypted electronic contract and encrypted, obtain encrypted electronic contract；Encrypted electronic contract is issued to user terminal and contract management platform respectively, and receives the confirmation contract signature instruction of feedback, determines that electronic contract signature is completed.By the above-mentioned means, efficiently solving, existing electronic contract signature is complicated for operation, interior to be easy the technical issues of being tampered.
Description
Technical field
The present invention relates to field of information security technology more particularly to it is a kind of based on block chain electronic contract signature method,
Device, equipment and storage medium.
Background technique
It using with the development of internet technology and on a large scale, electronic contract is based on it convenient for transmitting, being convenient for store, and at
This low characteristic has gradually replaced traditional papery contract, already becomes a hot spot of enterprise's application.
Currently, safety and compliance in order to ensure electronic contract, electronic contract at least need during signature
One trusted third party participates in, such as the certificate authority (Certificate Authority, CA) of maintenance digital certificate,
Or the notarial office based on specific public letter identity.Although the center CA based on Public Key Infrastructure be technically it is reliable,
It is reliable on condition that the electron key (Ukey) of hardware medium must be used, this allows for the convenience of electronic contract by tight
Ghost image is rung.And the intervention based on notarial office, although legally can solve the objective believable identity problems of electronic contract platform,
But this can only trust for the morals to notarial office completely, can not technically realize reliable guarantee.
So it is urgent to provide a kind of signing process is convenient, the secure and trusted electronic contract signature not being tampered of treaty content
Method.
Above content is only used to facilitate the understanding of the technical scheme, and is not represented and is recognized that above content is existing skill
Art.
Summary of the invention
The electronic contract signature method, apparatus that the main purpose of the present invention is to provide a kind of based on block chain, equipment and
Storage medium, it is intended to solve the prior art electronic contract signature technology that process is not convenient enough, treaty content is easy to be tampered and ask
Topic.
To achieve the above object, the present invention provides a kind of, and the electronic contract based on block chain signs method, the method
The following steps are included:
Application is signed in response to the contract of user terminal triggering, obtains user information, the user of the user terminal uploads
The identification code and loan transaction type of the credit agency of selection；
The electronic contract template with the loan transaction type matching is searched in the electronic contract template library prestored, pre-
The matched credit agency's information of identification code with the credit agency is searched in the credit agency's information bank deposited；
According to preset rules, by the user information and credit agency's information input to the electronic contract template
In, obtain electronic contract to be encrypted；
Based on block chain, the electronic contract to be encrypted is encrypted, encrypted electronic contract is obtained；
The encrypted electronic contract is issued to the contract management platform of the user terminal and the credit agency respectively,
And the confirmation contract signature instruction of feedback is received, determine that the electronic contract signature is completed.
Preferably, after the user information for obtaining the user terminal uploads, the method also includes:
The user information is verified, determines that the user information is effective；
It is described that the user information is verified, it determines that the user information is effective, specifically includes:
According to the identity number of the identity user identity carried in the user information, it is right to obtain the identity number
The first biological information of the user answered；
Physical characteristics collecting instruction is issued to the user terminal, so that the user terminal is adopted according to the biological characteristic
The second biological information of the user of the contract signature application is initiated in collection instruction acquisition；
Second biological information for receiving the user terminal uploads, by second biological information and institute
It states the first biological information and carries out Characteristic Contrast；
If second biological information and first biometric information matches, it is determined that the user information has
Effect.
Preferably, described search in the electronic contract template library prestored is closed with the electronics of the loan transaction type matching
Same template, specifically includes:
According to the first mapping table constructed in advance, searched and the loan transaction in the electronic contract template library
The electronic contract template of type matching, first mapping table are the loan transaction type and the electronic contract template
Between corresponding relationship.
Preferably, the matched letter of identification code searched in the credit agency's information bank prestored with the credit agency
Organization information is borrowed, is specifically included:
According to the second mapping table constructed in advance, searched and the credit agency in credit agency's information bank
The matched credit agency's information of identification code, second mapping table be the credit agency identification code and the credit
Corresponding relationship between organization information.
Preferably, described to be based on block chain, the electronic contract to be encrypted is encrypted, encrypted electronic contract is obtained,
It specifically includes:
A block serial number is distributed for the electronic contract to be encrypted, and is all in the electronic contract to be encrypted
Character distributes corresponding sequence number, and it is locating in the electronic contract to be encrypted that the sequence number is used to identify corresponding character
Position；
According to the sequence number of the block serial number and each character, random parameter is distributed for each character；
According to the coding rule of cyclic redundancy check code, the cyclic redundancy check code of each character is calculated；
Each character in the electronic contract to be encrypted is traversed, according to the block serial number, traverse it is current
Character, the cyclic redundancy check code of the current character and the corresponding sequence number of the current character, calculate the current character
Fixed code the current character is carried out and according to the corresponding fixed code of the current character and the random parameter
Encryption, obtains the encrypted characters of the current character；
The corresponding encrypted characters of each character are successively obtained, generate the encrypted electronic according to all encrypted characters got
Contract.
Preferably, the confirmation contract for receiving feedback signs instruction, determines that the electronic contract signature is completed, specific to wrap
It includes:
The first confirmation contract signature instruction of the user terminal feedback is received, and records and receives the first confirmation contract
Sign the first time of instruction；
The second confirmation contract signature instruction of the contract management platform feedback is received, and records and receives second confirmation
Second time of contract signature instruction；
If the first time and second time are less than time threshold, it is determined that the electronic contract has been signed
At.
Preferably, after the determination electronic contract signature is completed, the method also includes:
The flow direction of the amount of the loan in the loan account carried in the user information is monitored, to ensure the amount of the loan
It allocates a fund for its specified purpose；
The flow direction of the amount of the loan in the loan account carried in the monitoring user information, to ensure the loan gold
Allocating a fund for its specified purpose for volume, specifically includes:
The amount of the loan expenditure confirmation application about the loan account for receiving the user terminal uploads, from the loan
Shroff account number is extracted in the expenditure confirmation application of the money amount of money；
According to the shroff account number, the corresponding account information of the shroff account number is obtained；
Judge whether the loan transaction type matches with the type of business carried in the account information；
If the type of business carried in the loan transaction type and the account information matches, the loan gold is agreed to
Volume expenditure confirmation application；
If the type of business carried in the loan transaction type and the account information mismatches, refuse the loan
Amount of money expenditure confirmation application.
In addition, to achieve the above object, the present invention also proposes a kind of electronic contract signature device based on block chain, described
Device includes: to obtain module, searching module, generation module, encrypting module and determining module；
Wherein, the acquisition module, the contract for triggering in response to user terminal sign application, it is whole to obtain the user
Hold the identification code and loan transaction type of the user information uploaded, the credit agency of user's selection；
The searching module, for being searched in the electronic contract template library prestored and the loan transaction type matching
Electronic contract template searches the matched credit agency of identification code with the credit agency in the credit agency's information bank prestored
Information；
The generation module, for according to preset rules, the user information and credit agency's information input to be arrived
In the electronic contract template, electronic contract to be encrypted is obtained；
The encrypting module encrypts the electronic contract to be encrypted, obtains encrypted electronic for being based on block chain
Contract；
Determining module, for the encrypted electronic contract to be issued to the user terminal and the credit agency respectively
Contract management platform, and the confirmation contract signature instruction of feedback is received, determine that the electronic contract signature is completed.
In addition, to achieve the above object, the present invention also proposes a kind of electronic contract signature equipment based on block chain, described
Equipment include: memory, processor and be stored on the memory and can run on the processor based on block chain
Electronic contract sign program, it is described based on block chain electronic contract signature program be arranged for carrying out it is as described above based on
The electronic contract of block chain signs the step of method.
In addition, to achieve the above object, the present invention also proposes a kind of storage medium, it is stored with and is based on the storage medium
The electronic contract of block chain signs program, and the electronic contract signature program based on block chain is realized such as when being executed by processor
The step of electronic contract based on block chain described above signs method.
The present invention passes through the phase being stored in advance with the electronic contract template of various loan transaction type matchings and credit agency
Information is closed, to need to only believe the user of user terminal uploads according to preset rules during carrying out electronic contract signature
The relevant information of the credit agency of breath and user's selection is input in electronic contract template, and a electronics to be encrypted can be obtained
Contract, whole process facilitate succinct.In addition, electronic contract is intercepted during issuing by other people in order to prevent, to treaty content
It is distorted, the present invention adds the content in obtained electronic contract to be encrypted by the encryption principle using block chain
Electronic contract that is close, being encrypted, it is ensured that electronic contract will not be distorted arbitrarily during being handed down to contract parties,
The safety and reliability of treaty content is effectively guaranteed.
Detailed description of the invention
Fig. 1 is the electronic contract signature equipment based on block chain for the hardware running environment that the embodiment of the present invention is related to
Structural schematic diagram；
Fig. 2 is that the present invention is based on the flow diagrams that the electronic contract of block chain signs method first embodiment；
Fig. 3 is that the present invention is based on the flow diagrams that the electronic contract of block chain signs method second embodiment；
Fig. 4 is that the present invention is based on the structural block diagrams that the electronic contract of block chain signs device first embodiment.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
It should be appreciated that described herein, specific examples are only used to explain the present invention, is not intended to limit the present invention.
Referring to Fig.1, Fig. 1 is the electronic contract based on block chain for the hardware running environment that the embodiment of the present invention is related to
Sign device structure schematic diagram.
As shown in Figure 1, should may include: processor 1001 based on the electronic contract signature equipment of block chain, such as center
Processor (Central Processing Unit, CPU), communication bus 1002, user interface 1003, network interface 1004 are deposited
Reservoir 1005.Wherein, communication bus 1002 is for realizing the connection communication between these components.User interface 1003 may include
Display screen (Display), input unit such as keyboard (Keyboard), optional user interface 1003 can also include having for standard
Line interface, wireless interface.Network interface 1004 optionally may include standard wireline interface and wireless interface (such as Wireless Fidelity
(WIreless-FIdelity, WI-FI) interface).Memory 1005 can be the random access memory (Random of high speed
Access Memory, RAM) memory, be also possible to stable nonvolatile memory (Non-Volatile Memory,
), such as magnetic disk storage NVM.Memory 1005 optionally can also be the storage device independently of aforementioned processor 1001.
It will be understood by those skilled in the art that structure shown in Fig. 1 is not constituted to the electronic contract based on block chain
The restriction for signing equipment may include perhaps combining certain components or different components than illustrating more or fewer components
Arrangement.
As shown in Figure 1, as may include operating system, data storage mould in a kind of memory 1005 of storage medium
Block, network communication module, Subscriber Interface Module SIM and the electronic contract based on block chain sign program.
In electronic contract signature equipment based on block chain shown in Fig. 1, network interface 1004 is mainly used for and user
Terminal, contract management platform carry out data communication；User interface 1003 is mainly used for carrying out data interaction with user；Base of the present invention
Processor 1001, memory 1005 in the electronic contract signature equipment of block chain can be set in the electronics based on block chain
Contract is signed in equipment, and the electronic contract signature equipment based on block chain is called in memory 1005 by processor 1001
The electronic contract based on block chain of storage signs program, and executes the electronics provided in an embodiment of the present invention based on block chain and close
With signature method.
The embodiment of the invention provides a kind of, and the electronic contract based on block chain signs method, is this hair referring to Fig. 2, Fig. 2
A kind of flow diagram of bright electronic contract signature method first embodiment based on block chain.
In the present embodiment, it is described based on block chain electronic contract signature method the following steps are included:
Step S10: signing application in response to the contract of user terminal triggering, obtains user's letter of the user terminal uploads
The identification code and loan transaction type for the credit agency that breath, user select.
Specifically, personal and little Wei enterprise uses for convenience, and the executing subject in the present embodiment specifically can be one
A third-party platform (hereinafter referred to as: electronic contract platform) for exclusively carrying out electronic contract signature, i.e., all enterprises and enterprise, enterprise
Industry and individual, the contract for needing to sign between individual and individual can be completed by the platform, and both parties need to only pay small
Volume expense, without the concern for any Technical investment.
Correspondingly, in order to ensure credit agency's capital management safe and convenient, electronic contract platform is also possible to by offer letter
It borrows what the credit agency serviced specially constructed, is mainly used for completing the contract between credit agency and client and signs.
It should be understood that in the concrete realization, which specifically can be is taken by one or more physics
Business device composition, is also possible to be made of virtual Cloud Server, is also possible to that it is common to be aided with virtual Cloud Server by physical server
Composition, concrete implementation mode, those skilled in the art, which can according to need, to build, herein with no restrictions.
In addition, the above-mentioned user information got, can specifically include the name of user, ID card No., phone number,
Common mailbox, instant messaging account (such as QQ, wechat), home address, the specified loan origination account (loan occurred below
Money account) and specified loan repayment account etc., it will not enumerate herein, any restrictions also do not done to this, implementing
In, those skilled in the art can according to need, the screening field for the information that rationally setting needs to obtain.
It, can be with for better identity user identity, in above-mentioned user information it should be understood that in the concrete realization
The biological informations such as human face image information, voiceprint, iris information including user.
In addition, it is noted that in order to guarantee that the user of initiation contract signature application is corresponding to above-mentioned user information
User, i.e., be not that criminal usurps the user information of the user and assumes another's name to provide a loan, getting the user terminal uploads
After user information, electronic contract platform needs verify the user information, when determining that the user information is effective,
Just carry out subsequent electronic contract signature operation.
About, the user information is verified, determines the user information efficient operation, it specifically can be by such as
Lower step is realized:
(1) according to the identity card of the identity number of the identity user identity carried in the user information, such as user
Number obtains the first biological information of the corresponding user of the identity number, such as people from citizenship information system
Face image information, voiceprint, iris information etc..
Specifically, above-mentioned described citizenship information system, in particular to when handling identity card for citizen, the Ministry of Public Security
Door is for storing the information system of user base identity information and biological information.
(2) Xiang Suoshu user terminal issues physical characteristics collecting instruction, so that the user terminal is special according to the biology
Levy the second biological information that the user of the contract signature application is initiated in acquisition instructions acquisition.
Such as when the first biological information obtained from citizenship information system is iris information, electronics
The physical characteristics collecting instruction that contract platform is issued to the user terminal is specially to control built in the user terminal calling
The image capture device that image capture device or PERCOM peripheral communication connect initiates the rainbow for the user that the contract signature is applied to acquire
Film image, and the use for initiating the contract signature application is extracted from the iris image of shooting according to corresponding Iris Pattern Extracting Technology
The iris information at family is as the second biological information.
It should be noted that above only for example, any restriction is not constituted to technical solution of the present invention, specific
In, those skilled in the art, which can according to need, to be configured, herein with no restrictions.
(3) second biological information for receiving the user terminal uploads, by second biological information
Characteristic Contrast is carried out with first biological information.
(4) if second biological information and first biometric information matches, it is determined that user's letter
Breath is effective.
It further, can be from electronic contract platform to the user terminal of user when obtaining the second biological information
Various random action instructions are issued, so that user makes corresponding movement according to random action instruction, or say corresponding content,
To avoid other people from pretending to be user using photo or recording, unnecessary economic loss is caused to user and credit agency.
In addition, the identifier of above-mentioned described credit structure, specifically can be the industrial and commercial registration number of credit agency, Huo Zheqi
He can be identified for that the identifier of credit agency's uniqueness, will not enumerate herein, and any restrictions are not also done to this.
In addition, above-mentioned described loan transaction type, can be the diversified forms such as loan for purchasing house, auto loan, loans for supporting students
Loan transaction type, will not enumerate herein, any restrictions also do not done to this.
Step S20: the electronic contract with the loan transaction type matching is searched in the electronic contract template library prestored
Template searches the matched credit agency's information of identification code with the credit agency in the credit agency's information bank prestored.
Specifically, the above-mentioned electronics searched in the electronic contract template library prestored with the loan transaction type matching
The operation of contract template, approximately as:
According to the first mapping table constructed in advance, searched and the loan transaction in the electronic contract template library
The electronic contract template of type matching.
It should be understood that the first mapping table described herein be mainly used for storing the loan transaction type with
Corresponding relationship between the electronic contract template.
For example, corresponding electronic contract template should be display house-purchase when loan transaction type is loan for purchasing house
Various information in transaction, for example, need include the address in house of purchase, developer, loan total amount, specified loan account,
Refund account, interest, loan period etc., will not enumerate herein, and any restrictions are not also done to this.
In addition, the above-mentioned matched credit of identification code searched in the credit agency's information bank prestored with the credit agency
The operation of organization information, approximately as:
According to the second mapping table constructed in advance, searched and the credit agency in credit agency's information bank
The matched credit agency's information of identification code.
It should be understood that the second mapping table described herein is mainly used for storing the identification of the credit agency
Corresponding relationship between code and credit agency's information.
In addition, above-mentioned described identification code should be the identification code that can be identified for that credit agency's uniqueness, such as credit machine
The formula number of registration of structure.
It should be noted that having the above is only for example, not constituting any restriction to technical solution of the present invention
During body is realized, those skilled in the art can according to need setting, herein with no restrictions.
Step S30: according to preset rules, the user information and credit agency's information input are closed to the electronics
With in template, obtaining electronic contract to be encrypted.
Specifically, above-mentioned described preset rules are pre-set during electronic contract signature, need to follow
Fill in rule, i.e., which region in electronic contract template is the name for needing to fill in user, ID card No., connection electricity
Words, specified loan origination account and specified loan repayment account, which region needs to fill in credit agency's information,
Which region needs to fill in the information such as the amount of the loan and loan period.
It should be noted that having the above is only for example, not constituting any restriction to technical solution of the present invention
During body is realized, those skilled in the art can according to need setting and fill in rule accordingly, herein with no restrictions.
Step S40: it is based on block chain, the electronic contract to be encrypted is encrypted, encrypted electronic contract is obtained.
About operation in step S40 can be specifically achieved by the steps of:
Step 1: distributing a block serial number for the electronic contract to be encrypted, and in the electronic contract to be encrypted
All characters distribute corresponding sequence number.
It should be noted that the sequence number is mainly used for mark character corresponding with the sequence number described to be added
The location of in close electronic contract.
Step 2: according to the sequence number of the block serial number and each character, distributing random parameter for each character.
Step 3: according to the coding rule of cyclic redundancy check code, calculating the cyclic redundancy check code of each character.
Step 4: each character in the electronic contract to be encrypted being traversed, according to the block serial number, is traversed
Current character, the cyclic redundancy check code of the current character and the corresponding sequence number of the current character, work as described in calculating
The fixed code of preceding character, and according to the corresponding fixed code of the current character and the random parameter, to the current word
Symbol is encrypted, and the encrypted characters of the current character are obtained.
It should be noted that in the present embodiment, according to the corresponding fixed code of the current character and described random
Parameter, when encrypting to the current character, the Encryption Algorithm of use specifically can be data encryption algorithm (Data
Encryption Algorithm, DEA).
Certainly, those skilled in the art, which also can according to need, selects other Encryption Algorithm to add above content
It is close, such as the arbitrary datas Encryption Algorithm such as common Hash Encryption Algorithm, it will not enumerate herein, also do not do any limit to this
System.
Due to being not intended to limit Encryption Algorithm to the encryption of electronic contract content in this case, but passing through above-mentioned various parameters
Combination, arrangement treat encrypted electronic contract and handled, no matter so which kind of Encryption Algorithm can ensure electricity using
The safety of sub- treaty content, thus this time repeat no more the specific implementation of various Encryption Algorithm.
In addition, the cipher mode that the application provides, by distributing a block serial number for electronic contract to be encrypted, then
Corresponding sequence number, random parameter and cyclic redundancy check code and fixation are distributed for all characters in electronic contract to be encrypted
Then code realizes the encryption to entire electronic contract file by the encryption to each character, thus even if issuing process
In, encrypted electronic contract is intercepted by other people, as the decryption information realization of each character can not be known to each
The decryption of character, therefore the safety of treaty content has been effectively ensured.
Also, this case carries out primary encryption to entire text by encrypting to each character, thus not
Typesetting and the format of electronic contract can be influenced because of encryption, and then the electronic contract after decryption is not in breakage.
Step 5: successively obtaining the corresponding encrypted characters of each character, generate described add according to all encrypted characters got
Close electronic contract.
For example, being ranked up according to the sequence number of each character script to the encrypted characters got, to obtain encrypted electronic
Contract；Alternatively, will obtain each encrypted characters according to preset random alignment rule and carry out random alignment, encrypted electronic conjunction is obtained
Together, concrete implementation mode, those skilled in the art can according to need setting, this time with no restrictions.
In addition, it should be noted that, only a kind of concrete mode for obtaining encrypted electronic contract is given above, in reality
In the application of border, those skilled in the art be can according to need, and be adjusted to above-mentioned steps, herein with no restrictions.
Step S50: the encrypted electronic contract is issued to the contract of the user terminal and the credit agency respectively
Platform is managed, and receives the confirmation contract signature instruction of feedback, determines that the electronic contract signature is completed.
Specifically, the contract management platform of credit agency, can be that credit agency builds is various dedicated for storing
The server of electronic contract, the contract management platform can be made of one or more physical servers, be also possible to by virtual
Cloud Server composition, is also possible to be aided with virtual Cloud Server by physical server and collectively constituted, concrete implementation mode, this
The technical staff in field, which can according to need, to build, herein with no restrictions.
In addition, signing instruction about the confirmation contract for receiving feedback, the operation that the electronic contract signature is completed, tool are determined
Body can be achieved by the steps of:
Firstly, receiving the first confirmation contract signature instruction of the user terminal feedback, and records and receive described first really
Recognize the first time of contract signature instruction；The second confirmation contract signature instruction of the contract management platform feedback is received, and is remembered
Record receives the second time of the second confirmation contract signature instruction.
Then, judge whether the first time and second time are more than time and son, if when described first
Between and second time be less than time threshold, it is determined that electronic contract signature is completed.
That is, in the conjunction that the encrypted electronic contract is issued to the user terminal and the credit agency respectively
After management platform, electronic contract platform can distinguish the confirmation contract signature instruction of receipt of contract both sides feedback, i.e. contract is double
After contract is checked by side, determination is had no objection, which can just come into force, and have legal effect.
However, it should be understood that above-mentioned described time threshold, in particular to electronic contract are from signing to the needs that come into force
Just can be within a reasonable period, else if the either side of contract parties has been because personal reason has forgotten the contract,
But this part of electronic contract is but constantly in waiting acknowledgement state, undoubtedly will cause the wave to electronic contract platform resource in this way
Take.
Correspondingly, when checking encrypted electronic contract, respective terminal device is needed by user and the business personnel of credit agency
It to be decrypted according to the inverse process of above-mentioned ciphering process, then can just view real treaty content, and determine contract
Whether rationally, if need to modify, then make corresponding contract signature instruction, such as confirmation contract signature instruction or modification
Contract signature instruction.
For encrypted electronic contract decrypting process approximately as:
Firstly, obtaining encryption all in the block serial number and the encrypted electronic contract of the encrypted electronic contract
Character sequence number corresponding with each encrypted characters.
Then, each encrypted characters in the encrypted electronic contract are traversed, can not be visited according to user is stored in advance
In the storage region asked can show character code table and complementation operational criterion, it is corresponding solid to obtain the current crypto character traversed
Determine code.
It should be noted that in the present embodiment it is described can show character code table, specifically can be U.S. information exchange mark
Quasi- code (American Standard Code for Information Interchange, ASCII) table, wherein store
Character code is specially ACSII code.
Further, in order to guarantee safety, other people or the ACSII code table is avoided, by a large amount of arithmetic operations, is realized
Decryption to setting up password can according to need and regularly update ACSII code table, concrete implementation mode, those skilled in the art
Member can according to need setting, herein with no restrictions.
Then, the cyclic redundancy check code of preamble encrypted characters is obtained.
It should be noted that preamble encrypted characters described herein are the encryption positioned at the previous position of current crypto character
Character, the cyclic redundancy check code of the preamble encrypted characters are the cyclic redundancy check code of the previous bit encryption character.
Then, according to the inverse operation criterion of the fixed code, to the fixed code, the block serial number, described current
The sequence number of encrypted characters and the cyclic redundancy check code of preamble encrypted characters carry out inverse operation, obtain the current crypto word
Accord with corresponding original character.
Finally, determining the encrypted electronic after all encrypted characters in the encrypted electronic contract are decrypted
Contract successful decryption.
It should be noted that it is given above the concrete mode that only a kind of pair of encrypted electronic contract is decrypted,
In practical application, those skilled in the art be can according to need, and is adjusted to above-mentioned steps, herein with no restrictions.
The present embodiment, which passes through, to be stored in advance and the electronic contract template of various loan transaction type matchings and credit agency
Relevant information, thus during carrying out electronic contract signature, it only need to be according to preset rules, by the user of user terminal uploads
The relevant information of the credit agency of information and user's selection is input in electronic contract template, and a electricity to be encrypted can be obtained
Sub- contract, whole process facilitate succinct.
In addition, electronic contract is intercepted during issuing by other people in order to prevent, treaty content is distorted, this implementation
Example encrypts the content in obtained electronic contract to be encrypted, is encrypted by the encryption principle using block chain
Electronic contract, it is ensured that electronic contract will not be distorted arbitrarily during being handed down to contract parties, conjunction is effectively guaranteed
With the safety and reliability of content.
With reference to Fig. 3, Fig. 3 is that a kind of process that the electronic contract based on block chain signs method second embodiment of the present invention is shown
It is intended to.
Based on above-mentioned first embodiment, the present embodiment is based on the electronic contract signature method of block chain in the step S50
Later, further includes:
Step S60: monitoring the flow direction of the amount of the loan in the loan account carried in the user information, to ensure the loan
The money amount of money is allocated a fund for its specified purpose.
About the flow direction of the amount of the loan in the loan account carried in the user information being monitored, to ensure the loan
The operation of the amount of money allocated a fund for its specified purpose, can specifically be achieved by the steps of:
Step 1: the amount of the loan expenditure confirmation application about the loan account of the user terminal uploads is received, from
Shroff account number is extracted in the amount of the loan expenditure confirmation application.
Specifically, loan account described herein is specially that user applies for that reception credit agency reserved when loan makes loans
Bank Account Number.
Amount of the loan expenditure confirmation application, specially user is when carrying out payment transaction using the loan account, according to friendship
Easy content, such as the merchandise news bought, businessman specify shroff account number (traditional bank's card number or stored value card etc.), commodity total
The generations such as price.Therefore, electronic contract platform is in the loan about the loan account for receiving the user terminal uploads
After the expenditure confirmation application of the money amount of money, it can be paid from the amount of the loan in confirmation application and extract shroff account number.
Step 2: according to the shroff account number, obtaining the corresponding account information of the shroff account number.
Specifically, bank card or applying for electronic wallet are whether handled, applicant usually requires to submit related letter
Breath.Therefore when getting shroff account number, various account informations corresponding with shroff account number can easily be got.
Such as when shroff account number is bank's card number, electronic contract platform can be by establishing the bank of cooperation therewith
System obtains account information corresponding with bank's card number, such as bank of deposit, account holder's information.
However, it should be understood that account holder's information specifically can be public affairs when bank's card number is the account that enterprise provides
The corporate message to build canals；When bank's card number is the account of personal user, account holder's information is the personal letter of card user
Breath.
Further, in order to verify the legitimacy of enterprise, when the shroff account number of acquisition is bank's card number that enterprise uses,
The information corresponding with the card number obtained can also include the letters such as the number of paying taxes, industrial and commercial registration number, credit code, the address of enterprise
Breath, will not enumerate herein, any restrictions is not also done to this, in the concrete realization, those skilled in the art can basis
It needs, the screening field for the information that rationally setting needs to obtain.
Also such as, when shroff account number is stored value card card number, electronic contract platform can use existing network and climb
Worm technology obtains corresponding registration information, such as account holder's information, contact method, address etc., will not enumerate herein, right
This does not also do any restrictions.
It should be noted that above only for example, any restriction is not constituted to technical solution of the present invention, specific
In, those skilled in the art, which can according to need, to be configured, herein with no restrictions.
Step 3: judging whether the loan transaction type matches with the type of business carried in the account information.
Specifically, if it is determined that the type of business carried in the loan transaction type and the account information matches, then
Execute step 4；It is no to then follow the steps 5.
Step 4: if the type of business carried in the loan transaction type and the account information matches, described in agreement
Amount of the loan expenditure confirmation application.
Step 5: if the type of business carried in the loan transaction type and the account information mismatches, refusing institute
State amount of the loan expenditure confirmation application.
In order to make it easy to understand, being illustrated below:
For example, the loan transaction type that user selects is loans for supporting students, and the shroff account number traded is a certain shopping
The account of platform, the then type of business carried in the corresponding account information of the account are then shopping type.
The type of business carried in the obvious loan transaction type and the account information be it is unmatched, at this time in order to
Ensure allocating a fund for its specified purpose for the amount of the loan, it is true that electronic contract platform can issue the refusal amount of the loan expenditure to the user terminal
Recognize application, i.e. the amount of the loan can not import the shroff account number from the loan account.
Correspondingly, when the loan transaction type that user selects is loans for supporting students, if the shroff account number traded is
When certain educational institution or user signed shroff account number reserved when loan agreement originally, then the loan transaction class can be determined
The type of business carried in type and the account information is matched, therefore electronic contract platform can be issued to the user terminal
The amount of the loan expenditure confirmation application is agreed to, so that the amount of the loan imports the shroff account number from the loan account.
It should be noted that above only for example, any restriction is not constituted to technical solution of the present invention, specific
In, those skilled in the art, which can according to need, to be configured, herein with no restrictions.
However, it should be understood that being given above also is only a kind of to monitor the loan carried in the user information
The specific implementation of the flow direction of the amount of the loan in account, does not constitute any restriction equally to technical solution of the present invention,
In the specific implementation, those skilled in the art can according to need setting, herein with no restrictions.
The present embodiment through the above scheme, after determining that the electronic contract signature is completed, passes through the monitoring user
The flow direction of the amount of the loan in the loan account carried in information, it is corresponding with the shroff account number in process of exchange in loan transaction type
The type of business mismatch when, refusal the amount of the loan from loan account in flow into shroff account number, to reach credit squeeze people
It is strictly provided in accordance with electronic contract, the amount of the loan of application is accomplished to allocate a fund for its specified purpose, and then credit agency can be greatly reduced
Money damage risk.
In addition, it is noted that in the concrete realization, in order to further ensure the reliability of electronic contract, in determination
After the completion of electronic contract signature, which can be published in the server based on block chain and carry out by electronic contract platform
Storage, to guarantee the safety and public credibility of electronic contract, while avoiding contract parties's random amendment of contract content,
Can effectively prevent invalid user stealing electronic contract, (this is because if to attack the server, hacker needs while breaking
51 percent block is translated, at high cost, as a consequence it is hardly possible to realize).
In addition, the embodiment of the present invention also proposes a kind of storage medium, it is stored on the storage medium based on block chain
Electronic contract signs program, and the electronic contract signature program based on block chain is realized as described above when being executed by processor
Electronic contract based on block chain the step of signing method.
It is that the present invention is based on the structural block diagrams that the electronic contract of block chain signs device first embodiment referring to Fig. 4, Fig. 4.
As shown in figure 4, the electronic contract signature device based on block chain that the embodiment of the present invention proposes includes: acquisition module
4001, searching module 4002, generation module 4003, encrypting module 4004 and determining module 4005.
Wherein, the acquisition module 4001, the contract for triggering in response to user terminal sign application, obtain the use
The identification code and loan transaction type of the credit agency of user information, user's selection that family terminal uploads.
The searching module 4002, for being searched and the loan transaction type in the electronic contract template library prestored
The electronic contract template matched searches the matched credit of identification code with the credit agency in the credit agency's information bank prestored
Organization information.
Specifically, in practical applications, searching module 4002 can be refined as electronic contract template search submodule and
Credit agency's information searching submodule.
Correspondingly, the above-mentioned electronic contract searched in the electronic contract template prestored with the loan transaction type matching
The operation of template, specifically can by electronic contract template search submodule realize, search mode approximately as:
According to the first mapping table constructed in advance, searched and the loan transaction in the electronic contract template library
The electronic contract template of type matching.
It should be understood that the first mapping table described herein be mainly used for storing the loan transaction type with
Corresponding relationship between the electronic contract template.
For example, corresponding electronic contract template should be display house-purchase when loan transaction type is loan for purchasing house
Various information in transaction, for example, need include the address in house of purchase, developer, loan total amount, specified loan account,
Refund account, interest, loan period etc., will not enumerate herein, and any restrictions are not also done to this.
Correspondingly, the above-mentioned matched letter of identification code searched in the credit agency's information bank prestored with the credit agency
Borrow organization information operation, can specifically be realized by credit agency's information searching submodule, lookup mode approximately as:
According to the second mapping table constructed in advance, searched and the credit agency in credit agency's information bank
The matched credit agency's information of identification code.
It should be understood that the second mapping table described herein is mainly used for storing the identification of the credit agency
Corresponding relationship between code and credit agency's information.
In addition, above-mentioned described identification code should be the identification code that can be identified for that credit agency's uniqueness, such as credit machine
The formula number of registration of structure.
It should be noted that having the above is only for example, not constituting any restriction to technical solution of the present invention
During body is realized, those skilled in the art can according to need setting, herein with no restrictions.
The generation module 4003 is used for according to preset rules, and the user information and credit agency's information is defeated
Enter into the electronic contract template, obtains electronic contract to be encrypted.
The encrypting module 4004 encrypts the electronic contract to be encrypted, is encrypted for being based on block chain
Electronic contract.
Specifically, in practical applications, encrypting module 4004 can be refined as distribution sub module, computational submodule, add
Close submodule and generation submodule.
Correspondingly, the cryptographic operation that encrypting module 4004 executes, can specifically refine are as follows:
It is one block serial number of the electronic contract distribution to be encrypted by distribution sub module, and is the electronics to be encrypted
All characters in contract distribute corresponding sequence number, and the sequence number is for identifying corresponding character in the electronics to be encrypted
The location of in contract；According to the sequence number of the block serial number and each character, random parameter is distributed for each character.
By computational submodule according to the coding rule of cyclic redundancy check code, the cyclic redundancy check code of each character is calculated.
Each character in the electronic contract to be encrypted is traversed by encryption submodule, according to the block serial number,
The cyclic redundancy check code and the corresponding sequence number of the current character of the current character, the current character that traverse calculate
The fixed code of the current character, and according to the corresponding fixed code of the current character and the random parameter, to described
Current character is encrypted, and the encrypted characters of the current character are obtained.
The corresponding encrypted characters of each character are successively obtained by generation submodule, are generated according to all encrypted characters got
The encrypted electronic contract.
Determining module 4005, for the encrypted electronic contract to be issued to the user terminal and the credit machine respectively
The contract management platform of structure, and the confirmation contract signature instruction of feedback is received, determine that the electronic contract signature is completed.
Specifically, in practical applications, determining module 4005 can equally be refined, it specifically can be by determination
Module 4005 is refined as first and determines that submodule, second determine that submodule and third determine submodule.
Correspondingly, determining module 4005 determines the operation that the electronic contract signature is completed, and can specifically refine are as follows:
It determines that submodule receives the first confirmation contract signature instruction of the user terminal feedback by first, and records and receive
The first time of the first confirmation contract signature instruction.
It determines that submodule receives the second confirmation contract signature instruction of the contract management platform feedback by second, and records
Receive the second time of the second confirmation contract signature instruction.
It determines that submodule determines that the first time and second time are less than time threshold by third, determines institute
Electronic contract signature is stated to complete.
In addition, it is noted that in practical applications, in order to guarantee the economic interests of user and credit agency, avoiding
Occur criminal steal user information application loan, after getting the user information of user terminal uploads, need to
Family information is verified, and is determining that user information is effective, i.e., when user information and creditor are same people, just carries out subsequent electricity
Sub- contract signs work, and the electronic contract signature device based on block chain provided in the present embodiment can also include user information
Authentication module.
Correspondingly, user information authentication module is when verifying the user information, mainly in the following way really
The fixed user information is effective:
Firstly, obtaining the identity mark according to the identity number of the identity user identity carried in the user information
Know the first biological information of number corresponding user.
Then, Xiang Suoshu user terminal issues physical characteristics collecting instruction, so that the user terminal is according to the biology
The second biological information of the user of the contract signature application is initiated in collection apparatus instruction acquisition.
Then, second biological information for receiving the user terminal uploads believes second biological characteristic
Breath carries out Characteristic Contrast with first biological information.
Finally, if second biological information and first biometric information matches, it is determined that the user
Information is effective.
It should be noted that being given above only a kind of concrete implementation mode, not to technical solution of the present invention
Any restriction is constituted, in the concrete realization, those skilled in the art can according to need setting, herein with no restrictions.
By foregoing description it is not difficult to find that the electronic contract signature device based on block chain provided in the present embodiment, leads to
The relevant information being stored in advance with the electronic contract template of various loan transaction type matchings and credit agency is crossed, thus carrying out
, only need to be according to preset rules during electronic contract is signed, the letter that the user information of user terminal uploads and user are selected
The relevant information for borrowing mechanism is input in electronic contract template, and a electronic contract to be encrypted, whole process side can be obtained
Just succinct.
In addition, electronic contract is intercepted during issuing by other people in order to prevent, treaty content is distorted, this implementation
Example encrypts the content in obtained electronic contract to be encrypted, is encrypted by the encryption principle using block chain
Electronic contract, it is ensured that electronic contract will not be distorted arbitrarily during being handed down to contract parties, conjunction is effectively guaranteed
With the safety and reliability of content.
It should be noted that workflow described above is only schematical, not to protection model of the invention
Enclose composition limit, in practical applications, those skilled in the art can select according to the actual needs part therein or
It all achieves the purpose of the solution of this embodiment, herein with no restrictions.
In addition, the not technical detail of detailed description in the present embodiment, reference can be made to provided by any embodiment of the invention
Electronic contract based on block chain signs method, and details are not described herein again.
Based on the first embodiment of the above-mentioned electronic contract signature device based on block chain, propose that the present invention is based on block chains
Electronic contract sign device second embodiment.
In the present embodiment, the electronic contract signature device based on block chain further includes monitoring module, the monitoring
Module, for monitoring the flow direction of the amount of the loan in the loan account carried in the user information, to ensure the amount of the loan
Allocate a fund for its specified purpose.
The behaviour of the flow direction of the amount of the loan in the loan account carried in the user information is monitored about the monitoring module
Make, specifically may is that the amount of the loan expenditure confirmation application about the loan account for receiving the user terminal uploads, from
Shroff account number is extracted in the amount of the loan expenditure confirmation application；According to the shroff account number, it is corresponding to obtain the shroff account number
Account information；Judge whether the loan transaction type matches with the type of business carried in the account information；If described
The type of business carried in loan transaction type and the account information matches, then agrees to the amount of the loan expenditure confirmation Shen
Please；If the type of business carried in the loan transaction type and the account information mismatches, refuse the amount of the loan
Expenditure confirmation application.
The present embodiment through the above scheme, after determining that the electronic contract signature is completed, passes through the monitoring user
The flow direction of the amount of the loan in the loan account carried in information, it is corresponding with the shroff account number in process of exchange in loan transaction type
The type of business mismatch when, refusal the amount of the loan from loan account in flow into shroff account number, to reach credit squeeze people
It is strictly provided in accordance with electronic contract, the amount of the loan of application is accomplished to allocate a fund for its specified purpose, and then credit agency can be greatly reduced
Money damage risk.
It should be noted that workflow described above is only schematical, not to protection model of the invention
Enclose composition limit, in practical applications, those skilled in the art can select according to the actual needs part therein or
It all achieves the purpose of the solution of this embodiment, herein with no restrictions.
In addition, the not technical detail of detailed description in the present embodiment, reference can be made to provided by any embodiment of the invention
Electronic contract based on block chain signs method, and details are not described herein again.
In addition, it should be noted that, herein, the terms "include", "comprise" or its any other variant are intended to contain
Lid non-exclusive inclusion, so that process, method, article or system including a series of elements are not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or system
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or system including the element.
The serial number of the above embodiments of the invention is only for description, does not represent the advantages or disadvantages of the embodiments.
Through the above description of the embodiments, those skilled in the art can be understood that above-described embodiment side
Method can be realized by means of software and necessary general hardware platform, naturally it is also possible to by hardware, but in many cases
The former is more preferably embodiment.Based on this understanding, technical solution of the present invention substantially in other words does the prior art
The part contributed out can be embodied in the form of software products, which is stored in a storage medium
In (such as read-only memory (Read Only Memory, ROM)/RAM, magnetic disk, CD), including some instructions are used so that one
Terminal device (can be mobile phone, computer, server or the network equipment etc.) executes side described in each embodiment of the present invention
Method.
The above is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (10)
1. a kind of electronic contract based on block chain signs method, which is characterized in that the described method includes:
Application is signed in response to the contract of user terminal triggering, obtains user information, the user's selection of the user terminal uploads
Credit agency identification code and loan transaction type；
The electronic contract template with the loan transaction type matching is searched in the electronic contract template library prestored, what is prestored
The matched credit agency's information of identification code with the credit agency is searched in credit agency's information bank；
It is obtained by the user information and credit agency's information input into the electronic contract template according to preset rules
To electronic contract to be encrypted；
Based on block chain, the electronic contract to be encrypted is encrypted, encrypted electronic contract is obtained；
The encrypted electronic contract is issued to the contract management platform of the user terminal and the credit agency respectively, and is connect
The confirmation contract for receiving feedback signs instruction, determines that the electronic contract signature is completed.
2. the method as described in claim 1, which is characterized in that the user information for obtaining the user terminal uploads it
Afterwards, the method also includes:
The user information is verified, determines that the user information is effective；
It is described that the user information is verified, it determines that the user information is effective, specifically includes:
According to the identity number of the identity user identity carried in the user information, it is corresponding to obtain the identity number
The first biological information of user；
Physical characteristics collecting instruction is issued to the user terminal, so that the user terminal refers to according to the physical characteristics collecting
Acquisition is enabled to initiate the second biological information of the user of the contract signature application；
Second biological information for receiving the user terminal uploads, by second biological information and described the
One biological information carries out Characteristic Contrast；
If second biological information and first biometric information matches, it is determined that the user information is effective.
3. the method as described in claim 1, which is characterized in that it is described in the electronic contract template library prestored search with it is described
The electronic contract template of loan transaction type matching, specifically includes:
According to the first mapping table constructed in advance, searched and the loan transaction type in the electronic contract template library
Matched electronic contract template, first mapping table is between the loan transaction type and the electronic contract template
Corresponding relationship.
4. the method as described in claim 1, which is characterized in that it is described in the credit agency's information bank prestored search with it is described
The matched credit agency's information of the identification code of credit agency, specifically includes:
According to the second mapping table constructed in advance, the knowledge with the credit agency is searched in credit agency's information bank
The other matched credit agency's information of code, identification code and the credit agency of second mapping table for the credit agency
Corresponding relationship between information.
5. the method as described in claim 1, which is characterized in that it is described be based on block chain, to the electronic contract to be encrypted into
Row encryption, obtains encrypted electronic contract, specifically includes:
A block serial number is distributed for the electronic contract to be encrypted, and is all characters in the electronic contract to be encrypted
Corresponding sequence number is distributed, the sequence number is used to identify corresponding character position locating in the electronic contract to be encrypted
It sets；
According to the sequence number of the block serial number and each character, random parameter is distributed for each character；
According to the coding rule of cyclic redundancy check code, the cyclic redundancy check code of each character is calculated；
Each character in the electronic contract to be encrypted is traversed, according to the block serial number, the current character traversed,
The cyclic redundancy check code of the current character and the corresponding sequence number of the current character, calculate the fixation of the current character
Code, and according to the corresponding fixed code of the current character and the random parameter, the current character is encrypted, is obtained
To the encrypted characters of the current character；
The corresponding encrypted characters of each character are successively obtained, the encrypted electronic is generated according to all encrypted characters got and closes
Together.
6. the method as described in claim 1, which is characterized in that the confirmation contract for receiving feedback signs instruction, determines institute
It states electronic contract signature to complete, specifically include:
The first confirmation contract signature instruction of the user terminal feedback is received, and records and receives the first confirmation contract signature
The first time of instruction；
The second confirmation contract signature instruction of the contract management platform feedback is received, and records and receives the second confirmation contract
Sign the second time of instruction；
If the first time and second time are less than time threshold, it is determined that the electronic contract signature is completed.
7. such as method as claimed in any one of claims 1 to 6, which is characterized in that the determination electronic contract signature is completed
Later, the method also includes:
The flow direction of the amount of the loan in the loan account carried in the user information is monitored, to ensure the special fund of the amount of the loan
It is dedicated；
The flow direction of the amount of the loan in the loan account carried in the monitoring user information, to ensure the amount of the loan
It allocates a fund for its specified purpose, specifically includes:
The amount of the loan expenditure confirmation application about the loan account for receiving the user terminal uploads, from the loan gold
Shroff account number is extracted in volume expenditure confirmation application；
According to the shroff account number, the corresponding account information of the shroff account number is obtained；
Judge whether the loan transaction type matches with the type of business carried in the account information；
If the type of business carried in the loan transaction type and the account information matches, the amount of the loan branch is agreed to
Confirmation application out；
If the type of business carried in the loan transaction type and the account information mismatches, refuse the amount of the loan
Expenditure confirmation application.
8. a kind of electronic contract based on block chain signs device, which is characterized in that described device includes: to obtain module, search
Module, generation module, encrypting module and determining module；
Wherein, the acquisition module, the contract for triggering in response to user terminal are signed application, are obtained on the user terminal
User information, the identification code and loan transaction type of the credit agency of user's selection of biography；
The searching module, for searching the electronics with the loan transaction type matching in the electronic contract template library prestored
Contract template is searched in the credit agency's information bank prestored and is believed with the matched credit agency of the identification code of the credit agency
Breath；
The generation module is used for according to preset rules, by the user information and credit agency's information input described in
In electronic contract template, electronic contract to be encrypted is obtained；
The encrypting module encrypts the electronic contract to be encrypted, obtains encrypted electronic conjunction for being based on block chain
Together；
Determining module, for the encrypted electronic contract to be issued to the contract of the user terminal and the credit agency respectively
Platform is managed, and receives the confirmation contract signature instruction of feedback, determines that the electronic contract signature is completed.
9. a kind of electronic contract based on block chain signs equipment, which is characterized in that the equipment includes: memory, processor
And the electronic contract signature program based on block chain that is stored on the memory and can run on the processor, it is described
Based on block chain electronic contract signature program be arranged for carrying out as described in any one of claims 1 to 7 based on block chain
Electronic contract sign method the step of.
10. a kind of storage medium, which is characterized in that be stored with the electronic contract signature journey based on block chain on the storage medium
Sequence, the electronic contract signature program based on block chain are realized as described in any one of claim 1 to 7 when being executed by processor
Electronic contract based on block chain the step of signing method.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811136758.2A CN109409876A (en) | 2018-09-27 | 2018-09-27 | Electronic contract signature method, apparatus, equipment and storage medium based on block chain |
| PCT/CN2018/122743 WO2020062642A1 (en) | 2018-09-27 | 2018-12-21 | Blockchain-based method, device, and equipment for electronic contract signing, and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811136758.2A CN109409876A (en) | 2018-09-27 | 2018-09-27 | Electronic contract signature method, apparatus, equipment and storage medium based on block chain |
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| Publication Number | Publication Date |
|---|---|
| CN109409876A true CN109409876A (en) | 2019-03-01 |
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ID=65465416
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811136758.2A Pending CN109409876A (en) | 2018-09-27 | 2018-09-27 | Electronic contract signature method, apparatus, equipment and storage medium based on block chain |
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| CN (1) | CN109409876A (en) |
| WO (1) | WO2020062642A1 (en) |
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| CN110113334A (en) * | 2019-05-05 | 2019-08-09 | 江苏全链通信息科技有限公司 | Contract processing method, equipment and storage medium based on block chain |
| CN110223200A (en) * | 2019-04-16 | 2019-09-10 | 深圳壹账通智能科技有限公司 | Intelligent contract maintaining method, device, electronic equipment and storage medium |
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| CN110557376A (en) * | 2019-08-01 | 2019-12-10 | 平安科技（深圳）有限公司 | Electronic contract signing method, electronic contract signing device, computer equipment and storage medium |
| CN110942382A (en) * | 2019-10-15 | 2020-03-31 | 平安科技（深圳）有限公司 | Electronic contract generating method and device, computer equipment and storage medium |
| CN110941860A (en) * | 2019-12-10 | 2020-03-31 | 博雅正链(北京)科技有限公司 | Block chain and biological feature based electronic contract associable analysis verification method |
| CN111145054A (en) * | 2019-12-30 | 2020-05-12 | 北京天威诚信电子商务服务有限公司 | Signing method, device and storage medium for electronic contracts of same type |
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| CN113961905A (en) * | 2021-12-20 | 2022-01-21 | 四川特号商盟科技有限公司 | Storage method of on-line agreement signing data |
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