CN109586919A - A kind of online contract signs method automatically - Google Patents
A kind of online contract signs method automatically Download PDFInfo
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- CN109586919A CN109586919A CN201811466912.2A CN201811466912A CN109586919A CN 109586919 A CN109586919 A CN 109586919A CN 201811466912 A CN201811466912 A CN 201811466912A CN 109586919 A CN109586919 A CN 109586919A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/32—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
- H04L9/3263—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials involving certificates, e.g. public key certificate [PKC] or attribute certificate [AC]; Public key infrastructure [PKI] arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/30—Public key, i.e. encryption algorithm being computationally infeasible to invert or user's encryption keys not requiring secrecy
- H04L9/3006—Public key, i.e. encryption algorithm being computationally infeasible to invert or user's encryption keys not requiring secrecy underlying computational problems or public-key parameters
- H04L9/302—Public key, i.e. encryption algorithm being computationally infeasible to invert or user's encryption keys not requiring secrecy underlying computational problems or public-key parameters involving the integer factorization problem, e.g. RSA or quadratic sieve [QS] schemes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/30—Public key, i.e. encryption algorithm being computationally infeasible to invert or user's encryption keys not requiring secrecy
- H04L9/3006—Public key, i.e. encryption algorithm being computationally infeasible to invert or user's encryption keys not requiring secrecy underlying computational problems or public-key parameters
- H04L9/3033—Public key, i.e. encryption algorithm being computationally infeasible to invert or user's encryption keys not requiring secrecy underlying computational problems or public-key parameters details relating to pseudo-prime or prime number generation, e.g. primality test
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/32—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
- H04L9/3236—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials using cryptographic hash functions
- H04L9/3239—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials using cryptographic hash functions involving non-keyed hash functions, e.g. modification detection codes [MDCs], MD5, SHA or RIPEMD
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/32—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
- H04L9/3247—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials involving digital signatures
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/32—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
- H04L9/3247—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials involving digital signatures
- H04L9/3249—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials involving digital signatures using RSA or related signature schemes, e.g. Rabin scheme
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L2209/00—Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
- H04L2209/60—Digital content management, e.g. content distribution
- H04L2209/608—Watermarking
Abstract
The invention discloses a kind of online contracts to sign method automatically, comprises the following steps: step 1, contract initiator identity information deposits card online, and contract signatory carries out on-line authentication to contract initiator's identity information；Step 2, corporate authentication is carried out by corporate message, contract signatory checks enterprise qualification information；Step 3, contract initiator writes electronic contract；Step 4, the summary info for the electronic contract original document write is encrypted, and contract initiator and contract signatory is distributed to by third party's FTP client FTP；Step 5, after decryption Fileview relevant information is errorless, contract signs direction third party FTP client FTP applying for electronic stamped signature, forms stamped signature document by contract initiator and contract signatory；Step 6, after contract signature, the summary info of the contract original document after signature is encrypted, third party is sent to and carries out depositing card online.The technology, which can simplify, to be signed the cumbersome problem of program of electronic contract and increases work efficiency.
Description
Technical field
The present invention relates to Internet technical field, in particular to a kind of online contract signs method automatically.
Background technique
E-commerce is lived with the current consumption that the development of network technology gradually penetrates into people, more and more networks
It is carried out in commercial activity selection line, basis and core of the electronic contract as e-commerce, the signing of electronic contract is compared at present
Common mode is the electron contract method based on digital certificate.
Current electronic contract information verification tedious steps before signing are complicated, need telephone expenses contract signing side to spend more
Time go to check the normalization of contract and reasonability, while when generating electronic stamp, the information encryption of use is not stringent,
It is easy to cause information-leakage or contract to distort and causes unnecessary dispute.
Chinese patent, publication number: publication date: 107680013 A of CN on 2 9th, 2018, discloses a kind of electronic contract
Online confirmation method, comprising: define multiple confirmation items of electronic contract, wherein the confirmation item includes one or more of,
But it is not limited to following manner: the method for the identity validation of the electronic contract signer, to the electronic contract content check
Method；It detects whether to receive triggering command；Enter confirmation process if receiving triggering command, in line justification starting
Prompt, and the prompt of subitem confirmation is carried out, implement a variety of confirmation methods, comprising: the first kind is used to confirm the confirmation of user identity
Method；Second class is the method for completing confirmation electronic contract content check.The technical solution closes user identity and electronics
Same confirmation method separately confirms that program is cumbersome, cannot embody the signing of e-commerce electronic contract under Background of Internet
Convenience.
Summary of the invention
The present invention asks in order to which the inefficiency, the program that solve to sign during e-commerce initiative electronic contract are cumbersome
Topic proposes a kind of online contract and signs method automatically, and the technology is by calling the data of the authentication center of independent third party, really
The safety of breath information-preserving carries out abstract encryption to the contract write, and automatic checking summary info closes signature in the form of watermark
At Electronic Signature is generated into seal, prevent a possibility that contract is tampered.
To realize the above-mentioned technical purpose, a kind of technical solution provided by the invention is a kind of online automatic signatory of contract
Method comprises the following steps:
Step 1, the legal person of contract initiator carries out identity information in third party's FTP client FTP and deposits card, contract signatory enterprise online
Industry calls the status of a legal person information of contract initiator to carry out on-line authentication；
Step 2, corporate authentication is carried out by corporate message, contract signatory checks enterprise qualification information；
Step 3, contract initiator writes electronic contract；
Step 4, it is encrypted by summary info of third party's FTP client FTP to the electronic contract original document write,
And contract initiator and contract signatory are distributed to by third party's FTP client FTP, it is checked for decryption；
Step 5, after decryption Fileview relevant information is errorless, contract signs direction third by contract initiator and contract signatory
Square FTP client FTP applying for electronic stamped signature forms stamped signature document；
Step 6, contract signature after, the summary info of the contract original document after signature is encrypted, be sent to third party into
Row deposits card online.
Further, in the step 1 third party's FTP client FTP in the following manner, to the information of contract initiator
It is authenticated:
Step 11, contract initiator registers personal account by third party's FTP client FTP, docks public security system by recognition of face
System carries out the real-name authentication of personal information；
Step 12, contract initiator logs in third party's FTP client FTP by personal information, and company incorporated's information passes through enterprise four
The real-name authentication of element progress enterprise.
Further, in the step 2 contract signatory in the following manner, personal information to contract initiator and
Enterprise qualification is checked:
Step 21, contract signatory logs in personal account by third party's FTP client FTP, receives the application of contract initiator；
Step 22, contract signatory calls the corporate message of contract initiator and company information to confirm whether or not application；If
It grants an application, goes to step 3, if disagreeing, contract initiator receives prompt information by third party's client individual center.
Further, contract initiator in the following manner, edits contract in the step 3:
Step 31, contract initiator agrees to prompt by the application that third party's FTP client FTP receives contract signatory, carries out electricity
Sub- contract is write；
Step 32, after the completion of electronic contract is write, third party's FTP client FTP is submitted to save.
Further, third party's FTP client FTP in the following manner, is believed the abstract of original document in the step 4
Breath is encrypted and is distributed:
Step 41, digest value is obtained first and calculate hash function, abstract is encrypted by md5 algorithm, according to plucking for selection
Want calculating of the information to needing content to be protected to carry out digest value in document.
Further, third party's FTP client FTP forms Electronic Signature in the following manner in the step 5:
Step 51, in order to ensure user and the correctness of his held key, public system need one it is just, be worth letter
Rely and the independent third-party institution works as authentication center CA；
Step 52, contract signatory needs first to register its public key to CA, then signs and issues digital certificate by CA；Institute on the digital certificate
Record is public key corresponding with private key；
Step 53, contract signatory is signed with digital signature and generates stamped signature document after electronic contract, can be by electronic document and same
Digital certificate sends contract initiator to together；Contract initiator is i.e. using public key verifications number label contained on digital certificate
The integrality that the authenticity and electronics of chapter are closed can firmly believe number as long as contract initiator can confirm that the voucher is sent out by CA really
Public key in word certificate is really that voucher meaning people is all.
Further, the generation of the private key and public key in the step step 52 is realized based on RSA Algorithm, specific to walk
It is rapid as follows:
Step 521, two different Big prime p and q are selected；
Step 522, product n=pq and Φ (n)=(p-1) (q-1) are calculated；
Step 523, selection is greater than the 1 random integers e for being less than Φ (n), so that gcd (e, Φ (n))=1；Note: gcd, that is, highest common divisor
Number；
Step 524, it calculates d and makes d*e=1mod Φ (n), be to calculate d*e mod Φ (n)=1；
Step 525, to each key k=(n, p, q, d, e), definition enciphering transformation is Ek (x)=xe mod n, and decryption transformation is
Dk (x)=yd mod n, here x, y ∈ Zn；
Step 526, p, q are destroyed, and with { e, n } for public-key cryptography, { d, n } is private cipher key.
Further, third party's FTP client FTP forms stamped signature document in the following manner in the step 53:
Step 531, after by obtaining the digest value of document, corresponding Digital Signature Algorithm is selected to sign summary info
Operation obtains signature result；Corresponding seal picture is chosen, then uses corresponding Digital Watermarking Embedded Algorithm by signature result
It is embedded into generation stamped signature picture in seal picture；
Step 532, the stamped signature picture of generation and document are subjected to binding and form stamped signature document.
Further, summary info extraction follows lower row logic in the step 41:
Step 411, the main information for extracting contract to the original contract that needs encrypt first, obtains according to md5 Encryption Algorithm and closes
Same hash value；
Step 412, the main information of stamped signature and then secondary extraction contract is signed in contract, and combines the hash of original contract
Value calculates final hash value, if original contract hash value changes, will lead to the defeasance finally contracted；If label
Contract after about is tampered, then the hash of original contract will also change, eventually is unmatched.
Further, the md5 Encryption Algorithm realizes that logic is as follows:
Step S1, the electronic contract write is divided into n block of information；
Step S2 carries out information filling to the last one block of information；
The each block of information of step S3. can do operation with an input quantity, using operation result as next input quantity.
Beneficial effects of the present invention: the data that technology passes through the authentication center of calling independent third party, it is ensured that the peace of information
Quan Xing carries out abstract encryption to the contract write, and signature is synthesized in seal by automatic checking summary info in the form of watermark
Electronic Signature is generated, a possibility that contract is tampered is prevented.
Detailed description of the invention
Fig. 1 is the implementation flow chart that a kind of online contract of the invention signs method automatically.
Specific embodiment
It is right with reference to the accompanying drawings and examples for the purpose of the present invention, technical solution and advantage is more clearly understood
The present invention is described in further detail, it should be appreciated that the specific embodiments described herein are only one kind of the invention
Most preferred embodiment, only to explain the present invention, and the scope of protection of the present invention is not limited, and those of ordinary skill in the art are not having
Every other embodiment obtained under the premise of creative work is made, shall fall within the protection scope of the present invention.
Embodiment: it as shown in Figure 1, a kind of online contract signs method automatically, comprises the following steps:
Step 1, the legal person of contract initiator carries out identity information in third party's FTP client FTP and deposits card, contract signatory enterprise online
Industry calls the status of a legal person information of contract initiator to carry out on-line authentication；
Step 2, corporate authentication is carried out by corporate message, contract signatory checks enterprise qualification information；
Step 3, contract initiator writes electronic contract；
Step 4, it is encrypted by summary info of third party's FTP client FTP to the electronic contract original document write,
And contract initiator and contract signatory are distributed to by third party's FTP client FTP, it is checked for decryption；
Step 5, after decryption Fileview relevant information is errorless, contract signs direction third by contract initiator and contract signatory
Square FTP client FTP applying for electronic stamped signature forms stamped signature document；
Step 6, contract signature after, the summary info of the contract original document after signature is encrypted, be sent to third party into
Row deposits card online.
Further, in the step 1 third party's FTP client FTP in the following manner, to the information of contract initiator
It is authenticated:
Step 11, contract initiator registers personal account by third party's FTP client FTP, docks public security system by recognition of face
System carries out the real-name authentication of personal information；
Step 12, contract initiator logs in third party's FTP client FTP by personal information, and company incorporated's information passes through enterprise four
The real-name authentication of element progress enterprise.Four element of enterprise includes legal person's name, status of a legal person card, enterprise's full name and system
One social credibility code.
Further, in the step 2 contract signatory in the following manner, personal information to contract initiator and
Enterprise qualification is checked:
Step 21, contract signatory logs in personal account by third party's FTP client FTP, receives the application of contract initiator；
Step 22, contract signatory calls the corporate message of contract initiator and company information to confirm whether or not application；If
It grants an application, goes to step 3, if disagreeing, contract initiator receives prompt information by third party's client individual center.
Further, contract initiator in the following manner, edits contract in the step 3:
Step 31, contract initiator agrees to prompt by the application that third party's FTP client FTP receives contract signatory, carries out electricity
Sub- contract is write；
Step 32, after the completion of electronic contract is write, third party's FTP client FTP is submitted to save.
Further, third party's FTP client FTP in the following manner, is believed the abstract of original document in the step 4
Breath is encrypted and is distributed:
Step 41, digest value is obtained first and calculate hash function, abstract is encrypted by md5 algorithm, according to plucking for selection
Want calculating of the information to needing content to be protected to carry out digest value in document.
Further, third party's FTP client FTP forms Electronic Signature in the following manner in the step 5:
Step 51, in order to ensure user and the correctness of his held key, public system need one it is just, be worth letter
Rely and the independent third-party institution works as authentication center CA；
Step 52, contract signatory needs first to register its public key to CA, then signs and issues digital certificate by CA；Institute on the digital certificate
Record is public key corresponding with private key；
Step 53, contract signatory is signed with digital signature and generates stamped signature document after electronic contract, can be by electronic document and same
Digital certificate sends contract initiator to together；Contract initiator is i.e. using public key verifications number label contained on digital certificate
The integrality that the authenticity and electronics of chapter are closed can firmly believe number as long as contract initiator can confirm that the voucher is sent out by CA really
Public key in word certificate is really that voucher meaning people is all.
Further, the generation of the private key and public key in the step 52 is to realize that specific steps are such as based on RSA Algorithm
Under:
Step 521, two different Big prime p and q are selected；
Step 522, product n=pq and Φ (n)=(p-1) (q-1) are calculated；
Step 523, selection is greater than the 1 random integers e for being less than Φ (n), so that gcd (e, Φ (n))=1；Note: gcd, that is, highest common divisor
Number；
Step 524, it calculates d and makes d*e=1mod Φ (n), be to calculate d*e mod Φ (n)=1；
Step 525, to each key k=(n, p, q, d, e), definition enciphering transformation is Ek (x)=xe mod n, and decryption transformation is
Dk (x)=yd mod n, here x, y ∈ Zn；
Step 526, p, q are destroyed, and with { e, n } for public-key cryptography, { d, n } is private cipher key.
Further, a specific embodiment as RSA Algorithm realization is as follows:
1) assume p=3, q=11(p, q is prime number), then N=pq=33；
2) r=Φ (n)=(p-1) (q-1)=(3-1) (11-1)=20；
3) e=3, then, d=7 are enabled according to gcd (e, Φ (n))=1, i.e. gcd (e, 20)=1.(two numbers exchange can also with)；
This is arrived, it has been determined that public key is (N, e)=(33,3), key is (N, d)=(33,7) for public key and key.
Further, third party's FTP client FTP forms stamped signature document in the following manner in the step 53:
Step 531, after by obtaining the digest value of document, corresponding Digital Signature Algorithm is selected to sign summary info
Operation obtains signature result；Corresponding seal picture is chosen, then uses corresponding Digital Watermarking Embedded Algorithm by signature result
It is embedded into generation stamped signature picture in seal picture；
Step 532, the stamped signature picture of generation and document are subjected to binding and form stamped signature document.
Further, summary info extraction follows lower row logic in the step 41:
Step 411, the main information for extracting contract to the original contract that needs encrypt first, obtains according to md5 Encryption Algorithm and closes
Same hash value；
Step 412, the main information of stamped signature and then secondary extraction contract is signed in contract, and combines the hash of original contract
Value calculates final hash value, if original contract hash value changes, will lead to the defeasance finally contracted；If label
Contract after about is tampered, then the hash of original contract will also change, eventually is unmatched.
Further, the md5 Encryption Algorithm realizes that logic is as follows:
Step S1, the electronic contract write is divided into n block of information；
Step S2 carries out information filling to the last one block of information；
The each block of information of step S3. can do operation with an input quantity, using operation result as next input quantity.
Further, a specific embodiment of the md5 Encryption Algorithm is as follows:
Message is splitted into several 512 groupings first, wherein last 512 groupings are " message endings+byte of padding
(100 ... 0)+64 message-lengths ", to ensure the message for different length, the grouping is not identical；And 4 32 bit registers
Word is initialized as A=0x01234567, B=0x89abcdef, C=0xfedcba98, D=0x76543210, they will be participated in always
Operation simultaneously forms final hashed result；
Then each 512 message grouping enters the major cycle of algorithm, of 512 message groupings in the form of 16 32 words
Number determines the number of circulation.Major cycle has 4 wheels, and every wheel has used nonlinear function respectively；
F (X, Y, Z)=(X ∧ Y) ∨ (~X ∧ Z)；
G (X, Y, Z)=(X ∧ Z) ∨ (Y ∧~Z)；
H(X, Y, Z) =X ⊕ Y ⊕ Z；
I (X, Y, Z)=X ⊕ (Y ∨~Z)；
This 4 round transformation be to enter major cycle 512 message be grouped 16 32 words proceed as follows respectively: by A, B,
C, 3 results after F, G, H, I operation in copy a, b, c, d of D are added with the 4th, add 32 words and one 32
The additive constant of position word, and by several positions of value ring shift left of gained, finally by acquired results plus one of a, b, c, d, and return
It send to ABCD, thus completes one cycle；
Additive constant used by a such table T [i] Lai Dingyi, the sinusoidal absolute value of wherein i is 1 ... 64, T [i] are i it
The integer part of 4294967296 powers, this is done to further be eliminated in transformation by SIN function and power function
Linearly；
After all 512 groupings all operations, the cascade of ABCD will be outputted as the result of MD5 hash；
Here is the example of some MD5 hashed results:
MD5 ("") = d41d8cd98f00b204e9800998ecf8427e；
MD5 ("a") = 0cc175b9c0f1b6a831c399e269772661；
MD5 ("abc") = 900150983cd24fb0d6963f7d28e17f72；
MD5 ("message digest") = f96b697d7cb7938d525a2f31aaf161d0；
MD5 ("123456789012345678901234567890123456789012345678901234567890123456
78901234567890") = 57edf4a22be3c955ac49da2e2107b67a。
The specific embodiment of the above is the better embodiment that a kind of online contract of the present invention signs method automatically,
Not limit specific implementation range of the invention with this, the scope of the present invention includes being not limited to present embodiment, it is all according to
Equivalence changes made by shape, structure according to the present invention are within the scope of the invention.
Claims (10)
1. a kind of online contract signs method automatically, which is characterized in that comprise the following steps:
Step 1, the legal person of contract initiator carries out identity information in third party's FTP client FTP and deposits card, contract signatory enterprise online
Industry calls the status of a legal person information of contract initiator to carry out on-line authentication；
Step 2, corporate authentication is carried out by corporate message, contract signatory checks enterprise qualification information；
Step 3, contract initiator writes electronic contract；
Step 4, it is encrypted by summary info of third party's FTP client FTP to the electronic contract original document write,
And contract initiator and contract signatory are distributed to by third party's FTP client FTP, it is checked for decryption；
Step 5, after decryption Fileview relevant information is errorless, contract signs direction third by contract initiator and contract signatory
Square FTP client FTP applying for electronic stamped signature forms stamped signature document；
Step 6, contract signature after, the summary info of the contract original document after signature is encrypted, be sent to third party into
Row deposits card online.
2. a kind of online contract according to claim 1 signs method automatically, it is characterised in that: in the step 1
Tripartite's FTP client FTP in the following manner, authenticates the information of contract initiator:
Step 11, contract initiator registers personal account by third party's FTP client FTP, docks public security system by recognition of face
System carries out the real-name authentication of personal information；
Step 12, contract initiator logs in third party's FTP client FTP by personal information, and company incorporated's information passes through enterprise four
The real-name authentication of element progress enterprise.
3. a kind of online contract according to claim 1 signs method automatically, it is characterised in that: closed in the step 2
In the following manner with signatory, the personal information and enterprise qualification of contract initiator are checked:
Step 21, contract signatory logs in personal account by third party's FTP client FTP, receives the application of contract initiator；
Step 22, contract signatory calls the corporate message of contract initiator and company information to confirm whether or not application；If
It grants an application, goes to step 3, if disagreeing, contract initiator receives prompt information by third party's client individual center.
4. a kind of online contract according to claim 1 signs method automatically, it is characterised in that: closed in the step 3
In the following manner with initiator, contract is edited:
Step 31, contract initiator agrees to prompt by the application that third party's FTP client FTP receives contract signatory, carries out electricity
Sub- contract is write；
Step 32, after the completion of electronic contract is write, third party's FTP client FTP is submitted to save.
5. a kind of online contract according to claim 1 signs method automatically, it is characterised in that: in the step 4
Tripartite's FTP client FTP is encrypted and is distributed in the following manner, to the summary info of original document:
Step 41, digest value is obtained first and calculate hash function, abstract is encrypted by md5 algorithm, according to plucking for selection
Want calculating of the information to needing content to be protected to carry out digest value in document.
6. a kind of online contract according to claim 1 signs method automatically, it is characterised in that: in the step 5
Tripartite's FTP client FTP forms Electronic Signature in the following manner:
Step 51, in order to ensure user and the correctness of his held key, public system need one it is just, be worth letter
Rely and the independent third-party institution works as authentication center CA；
Step 52, contract signatory needs first to register its public key to CA, then signs and issues digital certificate by CA；Institute on the digital certificate
Record is public key corresponding with private key；
Step 53, contract signatory is signed with digital signature and generates stamped signature document after electronic contract, can be by electronic document and same
Digital certificate sends contract initiator to together；Contract initiator is i.e. using public key verifications number label contained on digital certificate
The integrality that the authenticity and electronics of chapter are closed can firmly believe number as long as contract initiator can confirm that the voucher is sent out by CA really
Public key in word certificate is really that voucher meaning people is all.
7. a kind of online contract according to claim 6 signs method automatically, it is characterised in that: the step step 52
In private key and public key generation be based on RSA Algorithm realize, the specific steps are as follows:
Step 521, two different Big prime p and q are selected；
Step 522, product n=pq and Φ (n)=(p-1) (q-1) are calculated；
Step 523, selection is greater than the 1 random integers e for being less than Φ (n), so that gcd (e, Φ (n))=1；Note: gcd, that is, highest common divisor
Number；
Step 524, it calculates d and makes d*e=1mod Φ (n), be to calculate d*e mod Φ (n)=1；
Step 525, to each key k=(n, p, q, d, e), definition enciphering transformation is Ek (x)=xe mod n, and decryption transformation is
Dk (x)=yd mod n, here x, y ∈ Zn；
Step 526, p, q are destroyed, and with { e, n } for public-key cryptography, { d, n } is private cipher key.
8. a kind of online contract according to claim 6 signs method automatically, it is characterised in that: in the step 53
Tripartite's FTP client FTP forms stamped signature document in the following manner:
Step 531, after by obtaining the digest value of document, corresponding Digital Signature Algorithm is selected to sign summary info
Operation obtains signature result；Corresponding seal picture is chosen, then uses corresponding Digital Watermarking Embedded Algorithm by signature result
It is embedded into generation stamped signature picture in seal picture；
Step 532, the stamped signature picture of generation and document are subjected to binding and form stamped signature document.
9. a kind of online contract according to claim 5 signs method automatically, it is characterised in that: plucked in the step 41
Information extraction is wanted to follow lower row logic:
411, the main information of contract is extracted to the original contract that needs encrypt first, contract is obtained according to md5 Encryption Algorithm
Hash value；
412, the main information of stamped signature and then secondary extraction contract is signed in contract, and combine the hash value meter of original contract
Final hash value is calculated, if original contract hash value changes, will lead to the defeasance finally contracted；If after signing
Contract be tampered, then the hash of original contract will also change, eventually unmatch.
10. a kind of online contract according to claim 5 or 9 signs method automatically, it is characterised in that: the md5 adds
Close algorithm realizes that logic is as follows:
S1, the electronic contract write is divided into n block of information
S2 carries out information filling to the last one block of information；
S3. each block of information can do operation with an input quantity, using operation result as next input quantity.
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| CN110096901A (en) * | 2019-05-08 | 2019-08-06 | 北京智签科技有限公司 | Electronic contract data encryption storage method and signed client end |
| CN110955785A (en) * | 2019-12-06 | 2020-04-03 | 南通中实纺织交易市场有限公司 | Transaction method for realizing accurate locking on line based on spot resources |
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| CN110955785A (en) * | 2019-12-06 | 2020-04-03 | 南通中实纺织交易市场有限公司 | Transaction method for realizing accurate locking on line based on spot resources |
| CN111311179A (en) * | 2020-02-07 | 2020-06-19 | 北京星选科技有限公司 | Object processing method and device, electronic equipment and computer readable storage medium |
| CN111597591A (en) * | 2020-05-13 | 2020-08-28 | 杭州天谷信息科技有限公司 | Hybrid signature method and system |
| CN111753276A (en) * | 2020-06-08 | 2020-10-09 | 江苏任务网络科技有限公司 | Traceable multi-party electronic signing method, computer equipment and storage medium |
| CN111985991A (en) * | 2020-07-20 | 2020-11-24 | 河北鑫牧思网络科技有限公司 | Electronic contract processing method and data storage center |
| CN112749380A (en) * | 2021-01-19 | 2021-05-04 | 上海茵罗智能科技有限公司 | Method for automatically signing contract on line |
| CN113673988A (en) * | 2021-08-02 | 2021-11-19 | 苏州优炫智能科技有限公司 | Electronic contract online transaction method and transaction system |
| CN116757884A (en) * | 2023-06-19 | 2023-09-15 | 湖南企企通科技有限公司 | Contract signing method, device, equipment and medium |
| CN116992470A (en) * | 2023-08-08 | 2023-11-03 | 广东企企通科技有限公司 | Collaborative authorization protocol signing method, device, computer equipment and storage medium |
| CN116992470B (en) * | 2023-08-08 | 2024-04-26 | 广东企企通科技有限公司 | Collaborative authorization protocol signing method, device, computer equipment and storage medium |
| CN116776393A (en) * | 2023-08-18 | 2023-09-19 | 深圳市企企通科技有限公司 | Industry enabling contract signing method, device, computer equipment and storage medium |
| CN116776393B (en) * | 2023-08-18 | 2023-11-24 | 深圳市企企通科技有限公司 | Industry enabling contract signing method, device, computer equipment and storage medium |
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