CN112395590A

CN112395590A - Multiplexing method, device and equipment of electronic signature and storage medium

Info

Publication number: CN112395590A
Application number: CN202011282971.1A
Authority: CN
Inventors: 黄学蒙
Original assignee: Ping An Puhui Enterprise Management Co Ltd
Current assignee: Ping An Puhui Enterprise Management Co Ltd
Priority date: 2020-11-17
Filing date: 2020-11-17
Publication date: 2021-02-23

Abstract

The invention relates to the field of block chains, and discloses a multiplexing method, a multiplexing device, multiplexing equipment and a multiplexing storage medium for electronic signatures, which are used for improving the confirmation efficiency of a user for confirming a basic document to be signed. The multiplexing method of the electronic signature comprises the following steps: acquiring a plurality of initial signature keywords in a plurality of initial files to be signed, and hiding the initial signature keywords except the initial signature keywords at the positions of the plurality of initial signature keywords by using a hiding function; acquiring an electronic signature from a target basic document to be signed to obtain a target signed document; generating an encrypted data string by adopting an asymmetric encryption algorithm to obtain integrated signature data; the integrated signature data is transmitted to other basic files to be signed and verified, and the verified integrated signature data is mapped to other basic files to be signed by using a preset mapping function to obtain a plurality of other signed files; and combining the target signed file with a plurality of other signed files to obtain a complete signed file. Wherein the initial to-be-signed file may be stored in the blockchain.

Description

Multiplexing method, device and equipment of electronic signature and storage medium

Technical Field

The invention relates to the field of intelligent contract signing, in particular to a multiplexing method, a multiplexing device, multiplexing equipment and a storage medium of an electronic signature.

Background

With the rapid development of computer technology, various industries improve user experience for the convenience of user operation, and enable users to directly confirm character information in electronic files in many scenes in which the users need to confirm the character information.

After confirming the text information in the electronic file, the user needs to sign after the position of the corresponding signature keyword at the tail of the electronic file. By using the existing signature plug-in Software Development Kit (SDK), an electronic name can be signed after the position of a signature keyword in a file to be signed, but when the number of electronic files to be confirmed is increased, a user needs to sign on a plurality of files to be signed respectively, so that the situation that the user signs again due to abnormal signatures is easy to occur, and the user signs the name for a plurality of times, so that the efficiency of confirming the file by the user is low due to repeated operations.

Disclosure of Invention

The invention provides a method, a device, equipment and a storage medium for multiplexing an electronic signature, which are used for improving the confirmation efficiency of a user for confirming a basic file to be signed.

The first aspect of the present invention provides a method for multiplexing an electronic signature, including: acquiring a plurality of initial signature keywords and a plurality of corresponding initial signature keyword positions in a plurality of initial files to be signed, and hiding the initial signature keywords except the initial signature keyword positions by using a hiding function to obtain a plurality of basic files to be signed; acquiring an electronic signature uploaded by a signer at the position of a target basic signature keyword in a target basic document to be signed, and generating a corresponding signature picture based on the electronic signature to obtain a target signed document; generating an encrypted data string of the signature picture by adopting an asymmetric encryption algorithm, and assembling the signature picture and the encrypted data string to obtain integrated signature data; transmitting the integrated signature data to other basic files to be signed, verifying the transmitted integrated signature data, and mapping the verified integrated signature data to positions of other basic signature keywords in the other basic files to be signed by using a preset mapping function to obtain a plurality of other signed files, wherein the other basic files to be signed are signed files except for the target basic file to be signed in the plurality of basic files to be signed, and the other basic signature keywords are signature keywords at corresponding positions in the other basic files to be signed; and combining the target signing file with the other signing files to obtain a complete signing file.

Optionally, in a first implementation manner of the first aspect of the present invention, the obtaining multiple initial signature keywords and corresponding multiple initial signature keyword positions in multiple initial files to be signed, and hiding, by using a hiding function, the initial signature keywords except for the multiple initial signature keyword positions to obtain multiple basic files to be signed includes: acquiring a plurality of initial signature keywords and corresponding positions of the plurality of initial signature keywords in a plurality of initial files to be signed; inquiring initial signature keywords except the positions of the initial signature keywords in the plurality of initial files to be signed to obtain a plurality of signature keywords to be hidden; and adding preset hidden labels behind the positions of the plurality of keywords of the signatures to be hidden by using a hidden function to complete the hiding of the plurality of signatures to be hidden, thereby obtaining a plurality of basic documents to be signed.

Optionally, in a second implementation manner of the first aspect of the present invention, the generating an encrypted data string of the signature picture by using an asymmetric encryption algorithm, and assembling the signature picture and the encrypted data string to obtain integrated signature data includes: decoding the signature picture by using a decoder, and calculating the hash value of the decoded signature picture; calculating the hash value of the signature picture by using a first preset formula and a second preset formula in an asymmetric encryption algorithm to generate an encrypted data string of the signature picture, wherein the first preset formula is as follows: r ═ g^kmod p) mod q, the second preset formula being: s ═ k (k)^-1(h (m) + xr)) mod q, where r denotes a first encrypted data string and p denotes a randomly generated first prime number, in the range of 2¹⁰²³<p<2¹⁰²⁴Q represents a first derived prime number, where (p-1) mod q ═ 0, and 2¹⁵⁹<q<2¹⁶⁰And g represents a second derivative prime number, wherein g ═ h^(p-1)÷q mod p，h represents a second randomly generated prime number, and 1<h<(p-1)，g>1, k denotes a temporary key, s denotes a second encrypted data string, h (m) denotes a hash value of a signature picture, x denotes a private key, specifically a random number or a pseudo-random number, and 0<x<q; and assembling the signature picture, the first encrypted data string and the second encrypted data string to obtain integrated signature data.

Optionally, in a third implementation manner of the first aspect of the present invention, the transmitting the integrated signature data to another basic file to be signed, verifying the transmitted integrated signature data, and mapping the verified integrated signature data to positions of other basic signature keywords in the other basic file to be signed by using a preset mapping function to obtain a plurality of other signed files, where the other basic file to be signed is a signed file in the plurality of basic files to be signed except for the target basic file to be signed, and the other basic signature keywords are signature keywords at corresponding positions in the other basic file to be signed include: transmitting the integrated signature data to other basic files to be signed, and verifying the transmitted integrated signature data to obtain verified integrated signature data; searching mapping labels preset at positions of other basic signature keywords in the other basic files to be signed, wherein the other basic signature keywords are signature keywords at corresponding positions in the other basic files to be signed; and mapping the verified integrated signature data to the position of the mapping label through a preset mapping function to complete the signing of the other basic files to be signed so as to obtain a plurality of other signed files, wherein the other basic files to be signed are signed files in the plurality of basic files to be signed except the target basic file to be signed.

Optionally, in a fourth implementation manner of the first aspect of the present invention, the transmitting the integrated signature data to another basic document to be signed, and performing a proofreading verification on the transmitted integrated signature data to obtain verified integrated signature data includes: transmitting the integrated signature data to other basic files to be signedRespectively calculating a first decrypted data string and a second decrypted data string of the transmitted integrated signature data according to a first verification formula and a second verification formula, wherein the first verification formula is as follows: u. of₁＝[H(M)×((s')^-1mod q)]mod q, the second verification formula is: u. of₂＝[r'×((s')^-1mod q)]mod q, where u₁Denotes a first decrypted data string, h (m) denotes a hash value of a signature picture in the integrated signature data after transmission, s' denotes a second encrypted data string in the integrated signature data after transmission, q denotes a first derived prime number, where (p-1) mod q ═ 0, and 2¹⁵⁹<q<2¹⁶⁰And p represents a randomly generated first prime number in the range of 2¹⁰²³<p<2¹⁰²⁴，u₂Representing the second decrypted data string, r' representing the first encrypted data string in the transmitted integrated signature data; calculating verification signature data of the transmitted integrated signature data according to a third preset formula, the first decrypted data string and the second decrypted data string, wherein the third preset formula is as follows:

wherein v denotes verification signature data and g denotes a second derivative prime number, where g ═ h^(p-1)Q mod p, h denotes the second element generated randomly, and 1<h<(p-1)，g>1, p denotes a randomly generated first prime number in the range of 2¹⁰²³<p<2¹⁰²⁴Q represents a first derived prime number, where (p-1) mod q ═ 0, and 2¹⁵⁹<q<2¹⁶⁰，u₁Representing a first decrypted data string, u₂Y denotes a second decrypted data string, y denotes a public key, and y is g^xmod p, x denotes that the private key is specifically a random or pseudo-random number, and 0<x<q; and judging whether the verification signature data is the same as the first encrypted data string in the transmitted integrated signature data, and if the verification signature data is the same as the first encrypted data string, finishing the proofreading and verification of the transmitted integrated signature data to obtain the verified integrated signature data.

Optionally, in a fifth implementation manner of the first aspect of the present invention, before acquiring an electronic signature uploaded by a signer at a position of a target basic signature keyword in a target basic document to be signed, and generating a corresponding signature picture based on the electronic signature to obtain the target signed document, generating an encrypted data string of the signature picture by using an asymmetric encryption algorithm, and assembling the signature picture and the encrypted data string to obtain integrated signature data, the method for multiplexing an electronic signature further includes: and marking the target basic signature keyword on the position of the other basic signature keywords through a mapping function on the other basic documents to be signed.

Optionally, in a sixth implementation manner of the first aspect of the present invention, the marking, by a mapping function, the target basic signature keyword at the position of the other basic signature keyword on the other basic document to be signed includes: searching the positions of the other basic signature keywords on the other basic documents to be signed; and adding a mapping label at the position of the other basic signature keywords, wherein the mapping label is the label name of the target basic signature keyword.

A second aspect of the present invention provides an apparatus for multiplexing an electronic signature, including: the hidden module is used for acquiring a plurality of initial signature keywords and a plurality of corresponding initial signature keyword positions in a plurality of initial files to be signed, and hiding the initial signature keywords except the initial signature keyword positions by using a hidden function to obtain a plurality of basic files to be signed; the acquisition module is used for acquiring the electronic signature uploaded by the signer at the position of the target basic signature keyword in the target basic document to be signed, and generating a corresponding signature picture based on the electronic signature to obtain the target signed document; the encryption module is used for generating an encrypted data string of the signature picture by adopting an asymmetric encryption algorithm and assembling the signature picture and the encrypted data string to obtain integrated signature data; the verification module is used for transmitting the integrated signature data to other basic files to be signed, verifying the transmitted integrated signature data, and mapping the verified integrated signature data to the positions of other basic signature keywords in the other basic files to be signed by using a preset mapping function to obtain a plurality of other signed files, wherein the other basic files to be signed are signed files in the plurality of basic files to be signed except for the target basic file to be signed, and the other basic signature keywords are signature keywords at corresponding positions in the other basic files to be signed; and the integration module is used for combining the target signing file with the other signing files to obtain a complete signing file.

Optionally, in a first implementation manner of the second aspect of the present invention, the hiding module is specifically configured to: acquiring a plurality of initial signature keywords and corresponding positions of the plurality of initial signature keywords in a plurality of initial files to be signed; inquiring initial signature keywords except the positions of the initial signature keywords in the plurality of initial files to be signed to obtain a plurality of signature keywords to be hidden; and adding preset hidden labels behind the positions of the plurality of keywords of the signatures to be hidden by using a hidden function to complete the hiding of the plurality of signatures to be hidden, thereby obtaining a plurality of basic documents to be signed.

Optionally, in a second implementation manner of the second aspect of the present invention, the encryption module is specifically configured to: decoding the signature picture by using a decoder, and calculating the hash value of the decoded signature picture; calculating the hash value of the signature picture by using a first preset formula and a second preset formula in an asymmetric encryption algorithm to generate an encrypted data string of the signature picture, wherein the first preset formula is as follows: r ═ g^kmod p) mod q, the second preset formula being: s ═ k (k)^-1(h (m) + xr)) mod q, where r denotes a first encrypted data string and p denotes a randomly generated first prime number, in the range of 2¹⁰²³<p<2¹⁰²⁴Q represents a first derived prime number, where (p-1) mod q ═ 0, and 2¹⁵⁹<q<2¹⁶⁰And g represents a second derivative prime number, wherein g ═ h^(p-1)Q mod p, h denotes the second element generated randomly, and 1<h<(p-1)，g>1, k denotes a temporary key, s denotes a second keyAn encrypted data string, H (m) represents a hash value of the signed picture, x represents a private key, in particular a random number or a pseudo-random number, and 0<x<q; and assembling the signature picture, the first encrypted data string and the second encrypted data string to obtain integrated signature data.

Optionally, in a third implementation manner of the second aspect of the present invention, the verification module includes: the verification unit is used for transmitting the integrated signature data to other basic files to be signed and verifying the transmitted integrated signature data to obtain verified integrated signature data; the query unit is used for searching mapping labels preset at the positions of other basic signature keywords in the other basic files to be signed, wherein the other basic signature keywords are signature keywords at corresponding positions in the other basic files to be signed; and the mapping unit is used for mapping the verified integrated signature data to the position of the mapping label through a preset mapping function, signing the other basic documents to be signed to obtain a plurality of other signed documents, wherein the other basic documents to be signed are signed documents in the plurality of basic documents to be signed except the target basic document to be signed.

Optionally, in a fourth implementation manner of the second aspect of the present invention, the verification unit is specifically configured to: transmitting the integrated signature data to other basic files to be signed, and respectively calculating a first decrypted data string and a second decrypted data string of the transmitted integrated signature data according to a first verification formula and a second verification formula, wherein the first verification formula is as follows: u. of₁＝[H(M)×((s')^-1mod q)]mod q, the second verification formula is: u. of₂＝[r'×((s')^-1mod q)]mod q, where u₁Denotes a first decrypted data string, h (m) denotes a hash value of a signature picture in the integrated signature data after transmission, s' denotes a second encrypted data string in the integrated signature data after transmission, q denotes a first derived prime number, where (p-1) modq ═ 0, and 2¹⁵⁹<q<2¹⁶⁰And p represents a randomly generated first prime number in the range of 2¹⁰²³<p<2¹⁰²⁴，u₂To representA second decrypted data string, r' representing the first encrypted data string in the transmitted integrated signature data; calculating verification signature data of the transmitted integrated signature data according to a third preset formula, the first decrypted data string and the second decrypted data string, wherein the third preset formula is as follows:

wherein v denotes verification signature data and g denotes a second derivative prime number, where g ═ h^(p-1)Qmomp, h represents the second element number generated randomly, and 1<h<(p-1)，g>1, p denotes a randomly generated first prime number in the range of 2¹⁰²³<p<2¹⁰²⁴Q represents a first derived prime number, where (p-1) mod q ═ 0, and 2¹⁵⁹<q<2¹⁶⁰，u₁Representing a first decrypted data string, u₂Y denotes a second decrypted data string, y denotes a public key, and y is g^xmod p, x denotes that the private key is specifically a random or pseudo-random number, and 0<x<q; and judging whether the verification signature data is the same as the first encrypted data string in the transmitted integrated signature data, and if the verification signature data is the same as the first encrypted data string, finishing the proofreading and verification of the transmitted integrated signature data to obtain the verified integrated signature data.

Optionally, in a fifth implementation manner of the second aspect of the present invention, the apparatus for multiplexing an electronic signature further includes: and the marking module is used for marking the target basic signature keyword on the positions of the other basic signature keywords through a mapping function on the other basic files to be signed.

Optionally, in a sixth implementation manner of the second aspect of the present invention, the marking module is specifically configured to: searching the positions of the other basic signature keywords on the other basic documents to be signed; and adding a mapping label at the position of the other basic signature keywords, wherein the mapping label is the label name of the target basic signature keyword.

A third aspect of the present invention provides an electronic signature multiplexing apparatus, including: a memory and at least one processor, the memory having instructions stored therein; the at least one processor invokes the instructions in the memory to cause the electronic signature multiplexing device to execute the electronic signature multiplexing method described above.

A fourth aspect of the present invention provides a computer-readable storage medium having stored therein instructions, which when run on a computer, cause the computer to execute the above-described method of multiplexing electronic signatures.

According to the technical scheme provided by the invention, a plurality of initial signature keywords and a plurality of corresponding initial signature keyword positions in a plurality of initial files to be signed are obtained, and the initial signature keywords except the initial signature keyword positions are hidden by using a hiding function to obtain a plurality of basic files to be signed; acquiring an electronic signature uploaded by a signer at the position of a target basic signature keyword in a target basic document to be signed, and generating a corresponding signature picture based on the electronic signature to obtain a target signed document; generating an encrypted data string of the signature picture by adopting an asymmetric encryption algorithm, and assembling the signature picture and the encrypted data string to obtain integrated signature data; transmitting the integrated signature data to other basic files to be signed, verifying the transmitted integrated signature data, and mapping the verified integrated signature data to positions of other basic signature keywords in the other basic files to be signed by using a preset mapping function to obtain a plurality of other signed files, wherein the other basic files to be signed are signed files except for the target basic file to be signed in the plurality of basic files to be signed, and the other basic signature keywords are signature keywords at corresponding positions in the other basic files to be signed; and combining the target signing file with the other signing files to obtain a complete signing file. In the embodiment of the invention, the electronic signature uploaded by a signer at the target basic signature keyword position in the target basic document to be signed is obtained, the electronic signature is encrypted by using an asymmetric encryption algorithm to obtain the integrated signature data, and the verified integrated signature data is mapped to the positions of other basic signature keywords in other basic documents to be signed by using the preset mapping function, so that the signing of a plurality of basic documents to be signed is completed, the times of signing names by users are reduced, and the confirmation efficiency of confirming the basic documents to be signed by the users is improved.

Drawings

Fig. 1 is a schematic diagram of an embodiment of a multiplexing method of an electronic signature according to an embodiment of the present invention;

fig. 2 is a schematic diagram of another embodiment of a multiplexing method of an electronic signature according to an embodiment of the present invention;

fig. 3 is a schematic diagram of an embodiment of a multiplexing apparatus for electronic signatures in an embodiment of the present invention;

fig. 4 is a schematic diagram of another embodiment of the multiplexing apparatus for electronic signatures in the embodiment of the present invention;

fig. 5 is a schematic diagram of an embodiment of a multiplexing device for electronic signatures in an embodiment of the present invention.

Detailed Description

The embodiment of the invention provides a method, a device, equipment and a storage medium for multiplexing an electronic signature, which are used for improving the confirmation efficiency of a user for confirming a basic file to be signed.

The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that the embodiments described herein may be practiced otherwise than as specifically illustrated or described herein. Furthermore, the terms "comprises," "comprising," or "having," and any variations thereof, are intended to cover non-exclusive inclusions, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

For convenience of understanding, a detailed flow of an embodiment of the present invention is described below, and referring to fig. 1, an embodiment of a multiplexing method for electronic signatures in an embodiment of the present invention includes:

101. acquiring a plurality of initial signature keywords and a plurality of corresponding initial signature keyword positions in a plurality of initial files to be signed, and hiding the initial signature keywords except the initial signature keyword positions by using a hiding function to obtain a plurality of basic files to be signed;

it is to be understood that the execution subject of the present invention may be a multiplexing device of electronic signature, and may also be a terminal or a server, which is not limited herein. The embodiment of the present invention is described by taking a server as an execution subject.

Under the scene that a user needs to sign each file after confirming a plurality of files, the user needs to sign names for a plurality of times, so that repeated operation not only causes poor user experience, but also causes low efficiency of confirming the files by the user. For example: under the scene that the user loans and uses the house as the mortgage, the house administration of each city needs to sign the relevant mortgage documents or certificates, the user as the signer needs to sign the names on the relevant documents or certificates, because there are many contents of the initial signature key on the associated document or certificate, as the signer needs to sign after the "first party" (initial signature key) located at the very last position of the certificate, but there are multiple keys in the entire associated certificate that have "party a" the same content as the original signature key, the server needs to add a preset hidden tag after the location where the signer is not required to sign and the initial signature key content exists, therefore, the purpose of hiding is achieved, and the server hides the initial signature keywords except the initial signature keywords at the positions of the initial signature keywords to obtain a plurality of basic files to be signed.

It is emphasized that, in order to further ensure the privacy and security of the initial document to be signed, the initial document to be signed may also be stored in a node of a blockchain.

102. Acquiring an electronic signature uploaded by a signer at the position of a target basic signature keyword in a target basic document to be signed, and generating a corresponding signature picture based on the electronic signature to obtain a target signed document;

after the server signs the plurality of basic files to be signed, the server can wait for the user to sign names at the position of the initial signature keywords, any one of the plurality of basic files to be signed is used as a target basic file to be signed, a signer signs an electronic signature on the target basic file to be signed, and the server processes the electronic signature to finally generate a corresponding signature picture to obtain the target signed file.

103. Generating an encrypted data string of the signature picture by adopting an asymmetric encryption algorithm, and assembling the signature picture and the encrypted data string to obtain integrated signature data;

because the electronic signature of the user has legal validity, the server needs to encrypt the signed picture after obtaining the signed picture, the encryption technology adopted here is an asymmetric encryption algorithm, and the asymmetric encryption algorithm is a secret method of a secret key. Asymmetric encryption algorithms require two keys: public key (public key) and private key (private key), public key and private key are one-to-one correspondence, if the public key is used to encrypt data, only the corresponding private key can be used to decrypt. The basic process of realizing confidential information exchange by the asymmetric encryption algorithm is as follows: the first party generates a pair of secret keys and discloses the public keys, and other roles (the second party) needing to send information to the first party encrypt the confidential information by using the secret keys (the public keys of the first party) and then send the encrypted confidential information to the first party; the first party decrypts the encrypted information by using the private key of the first party. The method is characterized in that when the party A wants to reply to the party B, the opposite is true, the public key of the party B is used for encrypting data, and similarly, the party B uses the private key of the party B for decrypting. According to the method and the device, the encrypted data string of the signature picture is generated by using an asymmetric encryption algorithm, and then the security of the signature picture is confirmed by verifying the encrypted data string.

104. The method comprises the steps of transmitting integrated signature data to other basic files to be signed, verifying the transmitted integrated signature data, and mapping the verified integrated signature data to the positions of other basic signature keywords in the other basic files to be signed by using a preset mapping function to obtain a plurality of other signed files, wherein the other basic files to be signed are signed files except for a target basic file to be signed in the plurality of basic files to be signed, and the other basic signature keywords are signature keywords at corresponding positions in the other basic files to be signed;

after acquiring the integrated signature data in the target basic file to be signed, the server needs to transmit and add the integrated signature data to other basic files to be signed, and after transmitting the integrated signature data to other files to be signed, the server needs to further verify the integrated signature data, so as to determine whether the transmitted integrated signature data includes a signature picture in the target basic file to be signed. After the transmitted integrated signature data is verified, the server can map the transmitted integrated signature data to the positions of other basic signature keywords in other basic files to be signed, and then the signing of other files to be signed is completed.

It should be noted that there may be one or more other documents to be signed, and the specific number of the other documents to be signed may be set according to the actual situation, but does not affect the transmission of the integrated signature data.

105. And combining the target signed file with a plurality of other signed files to obtain a complete signed file.

The server finally combines the signed target signed file with a plurality of other signed files, so that a complete signed file signed by the signer can be obtained, and the file confirmation efficiency of the signer is greatly improved.

In the embodiment of the invention, the electronic signature uploaded by a signer at the target basic signature keyword position in the target basic document to be signed is obtained, the electronic signature is encrypted by using an asymmetric encryption algorithm to obtain the integrated signature data, and the verified integrated signature data is mapped to the positions of other basic signature keywords in other basic documents to be signed by using the preset mapping function, so that the signing of a plurality of basic documents to be signed is completed, the times of signing names by users are reduced, and the confirmation efficiency of confirming the basic documents to be signed by the users is improved.

Referring to fig. 2, another embodiment of the method for multiplexing electronic signatures according to the embodiment of the present invention includes:

201. acquiring a plurality of initial signature keywords and a plurality of corresponding initial signature keyword positions in a plurality of initial files to be signed, and hiding the initial signature keywords except the initial signature keyword positions by using a hiding function to obtain a plurality of basic files to be signed;

specifically, a server firstly obtains a plurality of initial signature keywords and corresponding positions of the plurality of initial signature keywords in a plurality of initial files to be signed; then the server inquires initial signature keywords except the positions of the initial signature keywords in a plurality of initial files to be signed to obtain a plurality of signature keywords to be hidden; and finally, the server adds preset hidden labels behind the positions of the keywords of the plurality of signatures to be hidden by using the hidden function to complete the hiding of the plurality of signatures to be hidden, so as to obtain a plurality of basic documents to be signed.

The server firstly needs to query the positions of initial signature keywords except the positions of the initial signature keywords in a plurality of initial files to be signed, and determines the initial signature keywords at the positions as signature keywords to be hidden, wherein the number of the signature keywords to be hidden can be zero or one or more, and the specific number is set according to the character content in the initial files to be signed. And then the server adds preset hidden labels behind the positions of the plurality of to-be-hidden signature keywords by using a hidden function, so that the initial signature keywords except the positions of the plurality of initial signature keywords can be hidden, and the plurality of initial to-be-signed files after hidden processing are determined to be a plurality of basic to-be-signed files.

202. Acquiring an electronic signature uploaded by a signer at the position of a target basic signature keyword in a target basic document to be signed, and generating a corresponding signature picture based on the electronic signature to obtain a target signed document;

203. Marking target basic signature keywords on the positions of other basic signature keywords on other basic documents to be signed through a mapping function;

specifically, the server firstly searches the positions of other basic signature keywords on other basic files to be signed; and then adding a mapping label on the positions of other basic signature keywords by the server, wherein the mapping label is the label name of the target basic signature keyword.

Before the server maps the signature picture on the target basic file to be signed to other basic files to be signed, corresponding mapping labels need to be added after the positions of other basic signature keywords on other basic files to be signed, and the addition position error of the signature picture is prevented.

It should be noted that the mapping tag here is a signature tag of the target basic signature key, and the signature tag of the target basic signature key may be: the server can map the signature picture after the target basic signature keyword to the positions of other basic signature keywords of other basic files to be signed through the mapping function and the mapping label.

204. Generating an encrypted data string of the signature picture by adopting an asymmetric encryption algorithm, and assembling the signature picture and the encrypted data string to obtain integrated signature data;

specifically, the server firstly decodes the signature picture by using a decoder and calculates the hash value of the decoded signature picture; then theThe server calculates the hash value of the signature picture by using a first preset formula and a second preset formula in the asymmetric encryption algorithm to generate an encrypted data string of the signature picture, wherein the first preset formula is as follows: r ═ g^kmod p) mod q, the second preset formula is: s ═ k (k)^-1(h (m) + xr)) mod q, where r denotes a first encrypted data string and p denotes a randomly generated first prime number, in the range of 2¹⁰²³<p<2¹⁰²⁴Q represents a first derived prime number, where (p-1) mod q ═ 0, and 2¹⁵⁹<q<2¹⁶⁰And g represents a second derivative prime number, wherein g ═ h^(p-1)Q mod p, h denotes the second element generated randomly, and 1<h<(p-1)，g>1, k denotes a temporary key, s denotes a second encrypted data string, h (m) denotes a hash value of a signature picture, x denotes a private key, specifically a random number or a pseudo-random number, and 0<x<q; and assembling the signature picture, the first encrypted data string and the second encrypted data string to obtain integrated signature data.

The signature of the signer has certain legal benefit, so the server needs to encrypt the signature picture, an asymmetric encryption algorithm is adopted, specifically, a DSA digital signature algorithm is used, an encrypted data string corresponding to the signature picture can be generated through the algorithm, and the server assembles and integrates the encrypted data string and the signature picture to obtain integrated signature data. Specifically, the following example illustrates the process of generating the encrypted data string of the signature picture by the asymmetric encryption algorithm:

it is known that: b, sending a message to A, wherein the DSA algorithm is used for carrying out digital signature encryption:

1. the following data are randomly generated by B respectively:

a first prime number p ═ 59, a first derived prime number q ═ 29, a second prime number h ═ 11, a private key x ═ 7, a temporary key k ═ 10, and a message digest h (m) ═ 26;

2. generating a second derivative prime number g:

g＝h^(p-1)÷q mod p＝11²mod 59＝3；

3. calculating a public key y:

y＝g^xmod p＝3⁷mod 59＝4；

4. performing calculation of the encrypted data string:

the first encrypted data string: r ═ g^kmod p)mod q＝(59049mod 59)mod 29＝20，

Second encrypted data: s ═ k (k)^-1(H(m)+xr))mod q＝3×(26+140)mod 29＝5；

5. And assembling the signature picture, the first encrypted data string and the second encrypted data string to obtain integrated signature data.

205. The method comprises the steps of transmitting integrated signature data to other basic files to be signed, verifying the transmitted integrated signature data, and mapping the verified integrated signature data to the positions of other basic signature keywords in the other basic files to be signed by using a preset mapping function to obtain a plurality of other signed files, wherein the other basic files to be signed are signed files except for a target basic file to be signed in the plurality of basic files to be signed, and the other basic signature keywords are signature keywords at corresponding positions in the other basic files to be signed;

specifically, the server firstly transmits the integrated signature data to other basic files to be signed, and proofreads and verifies the transmitted integrated signature data to obtain verified integrated signature data; then the server searches mapping labels preset at the positions of other basic signature keywords in other basic files to be signed, wherein the other basic signature keywords are signature keywords at corresponding positions in the other basic files to be signed; and finally, the server maps the verified integrated signature data to the position of the mapping label through a preset mapping function to complete the signing of other basic files to be signed to obtain a plurality of other signed files, wherein the other basic files to be signed are signed files in the plurality of basic files to be signed except the target basic file to be signed.

The steps of the server in verifying the transmitted integrated signature data are as follows: the integrated signature data is transmitted to other basic files to be signed, a first decrypted data string and a second decrypted data string of the transmitted integrated signature data are respectively calculated according to a first verification formula and a second verification formula,the first verification formula is: u. of₁＝[H(M)×((s')^-1mod q)]mod q, the second verification formula: u. of₂＝[r'×((s')^-1mod q)]mod q, where u₁Denotes a first decrypted data string, h (m) denotes a hash value of a signature picture in the integrated signature data after transmission, s' denotes a second encrypted data string in the integrated signature data after transmission, q denotes a first derived prime number, where (p-1) mod q ═ 0, and 2¹⁵⁹<q<2¹⁶⁰And p represents a randomly generated first prime number in the range of 2¹⁰²³<p<2¹⁰²⁴，u₂Representing the second decrypted data string, r' representing the first encrypted data string in the transmitted integrated signature data; calculating verification signature data of the transmitted integrated signature data according to a third preset formula, the first decrypted data string and the second decrypted data string, wherein the third preset formula is as follows:

The server needs to transmit the integrated signature data to other basic files to be signed, so that the signing can be completed in the other basic files to be signed, but the server needs to verify the transmitted integrated signature data to ensure that the signature picture in the received integrated signature data is real and effective. Specifically, the following example is used to describe the verification process of the transmitted integrated signature data:

it is known that: b, sending a message to A, encrypting a digital signature by using a DSA algorithm to generate integrated signature data, and B sending the integrated signature data to A:

1. acquiring the following information from the integrated signature data received by A:

a first prime number p-59, a first derived prime number q-29, a second prime number h-11, a second derived prime number g-h^(p-1)÷q mod p＝11²mod 59 ═ 3, private key x ═ 7, temporary key k ═ 10, first encrypted data string r '═ 20 in the integrated signature data after transmission, second encrypted data string s' ═ 1/6 in the integrated signature data after transmission, and message digest h (m) ═ 26;

2. calculating a public key:

y＝g^xmod p＝3⁷mod 59＝4；

3. calculating a decrypted data string:

first decrypted data string: u. of₁＝[H(M)×((s')^-1mod q)]mod q＝[26×(6mod 29)]mod 29＝11，

Second decrypted data string: u. of₂＝[r'×((s')^-1mod q)]mod q＝[20×(6mod 29)]mod 29＝11；

4. Calculating verification signature data:

5. verify the relationship between v and r':

v ═ r ═ 20, verify succeed, A receives the message that B sends successfully;

in the present application, that is, the other basic document (a) to be signed successfully receives the integrated signature data (the authentic and valid signature picture) sent by the server (B), and the signature picture includes the corresponding text signed by the signer.

After verifying the received integrated signature data, the server inputs the verified integrated signature data into the corresponding mapping function, and the verified integrated signature data is mapped to the positions of other basic signature keywords in other basic files to be signed through the mapping function, so that the other basic files to be signed are signed, and other signed files are obtained.

206. And combining the target signed file with a plurality of other signed files to obtain a complete signed file.

With reference to fig. 3, the method for multiplexing electronic signatures according to the embodiment of the present invention is described above, and a multiplexing apparatus for electronic signatures according to the embodiment of the present invention is described below, where an embodiment of the multiplexing apparatus for electronic signatures according to the embodiment of the present invention includes:

the hiding module 301 is configured to obtain multiple initial signature keywords and corresponding multiple initial signature keyword positions in multiple initial files to be signed, and hide the initial signature keywords except for the initial signature keyword positions by using a hiding function to obtain multiple basic files to be signed;

the acquisition module 302 is configured to acquire an electronic signature uploaded by a signer at a position of a target basic signature keyword in a target basic document to be signed, and generate a corresponding signature picture based on the electronic signature to obtain a target signed document;

the encryption module 303 is configured to generate an encrypted data string of the signature picture by using an asymmetric encryption algorithm, and assemble the signature picture and the encrypted data string to obtain integrated signature data;

the verification module 304 is configured to transmit the integrated signature data to other basic documents to be signed, verify the transmitted integrated signature data, and map the verified integrated signature data to positions of other basic signature keywords in the other basic documents to be signed by using a preset mapping function to obtain a plurality of other signed documents, where the other basic documents to be signed are signed documents other than the target basic document to be signed in the plurality of basic documents to be signed, and the other basic signature keywords are signature keywords in corresponding positions in the other basic documents to be signed;

and the integrating module 305 is configured to combine the target signed document with a plurality of other signed documents to obtain a complete signed document.

Referring to fig. 4, another embodiment of the multiplexing apparatus for electronic signatures according to the embodiment of the present invention includes:

Optionally, the hiding module 301 is specifically configured to:

acquiring a plurality of initial signature keywords and corresponding positions of the plurality of initial signature keywords in a plurality of initial files to be signed;

inquiring initial signature keywords except the positions of the initial signature keywords in a plurality of initial files to be signed to obtain a plurality of signature keywords to be hidden;

and adding preset hidden labels behind the positions of the keywords of the plurality of signatures to be hidden by using a hidden function to complete the hiding of the plurality of signatures to be hidden, thereby obtaining a plurality of basic documents to be signed.

Optionally, the encryption module 303 is specifically configured to:

decoding the signature picture by using a decoder, and calculating the hash value of the decoded signature picture;

calculating the hash value of the signature picture by using a first preset formula and a second preset formula in the asymmetric encryption algorithm to generate an encrypted data string of the signature picture, wherein the first preset formula is as follows: r ═ g^kmod p) mod q, the second preset formula is: s ═ k (k)^-1(H(m) + xr)) mod q, where r represents the first encrypted data string and p represents the first randomly generated prime number, ranging from 2¹⁰²³<p<2¹⁰²⁴Q represents a first derived prime number, where (p-1) mod q ═ 0, and 2¹⁵⁹<q<2¹⁶⁰And g represents a second derivative prime number, wherein g ═ h^(p-1)Q mod p, h denotes the second element generated randomly, and 1<h<(p-1)，g>1, k denotes a temporary key, s denotes a second encrypted data string, h (m) denotes a hash value of a signature picture, x denotes a private key, specifically a random number or a pseudo-random number, and 0<x<q；

And assembling the signature picture, the first encrypted data string and the second encrypted data string to obtain integrated signature data.

Optionally, the verification module 304 includes:

the verification unit 3041 is configured to transmit the integrated signature data to other basic documents to be signed, and perform verification and verification on the transmitted integrated signature data to obtain verified integrated signature data;

the query unit 3042 is configured to search for mapping tags preset in positions of other basic signature keywords in other basic files to be signed, where the other basic signature keywords are signature keywords in corresponding positions in the other basic files to be signed;

the mapping unit 3043 is configured to map the verified integrated signature data to a position of the mapping tag through a preset mapping function, so as to complete signing of other basic documents to be signed, and obtain a plurality of other signed documents, where the other basic documents to be signed are signed documents in the plurality of basic documents to be signed, except for the target basic document to be signed.

Optionally, the verification unit 3041 is specifically configured to:

the method comprises the steps of transmitting the integrated signature data to other basic files to be signed, and respectively calculating a first decrypted data string and a second decrypted data string of the transmitted integrated signature data according to a first verification formula and a second verification formula, wherein the first verification formula is as follows: u. of₁＝[H(M)×((s')^-1mod q)]mod q, the second verification formula: u. of₂＝[r'×((s')^-1mod q)]modq, wherein u₁Denotes a first decrypted data string, h (m) denotes a hash value of a signature picture in the integrated signature data after transmission, s' denotes a second encrypted data string in the integrated signature data after transmission, q denotes a first derived prime number, where (p-1) mod q ═ 0, and 2¹⁵⁹<q<2¹⁶⁰And p represents a randomly generated first prime number in the range of 2¹⁰²³<p<2¹⁰²⁴，u₂Representing the second decrypted data string, r' representing the first encrypted data string in the transmitted integrated signature data;

calculating verification signature data of the transmitted integrated signature data according to a third preset formula, the first decrypted data string and the second decrypted data string, wherein the third preset formula is as follows:

wherein v denotes verification signature data and g denotes a second derivative prime number, where g ═ h^(p-1)Q mod p, h denotes the second element generated randomly, and 1<h<(p-1)，g>1, p denotes a randomly generated first prime number in the range of 2¹⁰²³<p<2¹⁰²⁴Q represents a first derived prime number, where (p-1) mod q ═ 0, and 2¹⁵⁹<q<2¹⁶⁰，u₁Representing a first decrypted data string, u₂Y denotes a second decrypted data string, y denotes a public key, and y is g^xmod p, x denotes that the private key is specifically a random or pseudo-random number, and 0<x<q；

And judging whether the verification signature data is the same as the first encrypted data string in the transmitted integrated signature data, and if the verification signature data is the same as the first encrypted data string, finishing the proofreading and verification of the transmitted integrated signature data to obtain the verified integrated signature data.

Optionally, the multiplexing apparatus for electronic signatures further includes:

and the marking module 306 is configured to mark the target basic signature keyword on the position of the other basic signature keywords through the mapping function on the other basic documents to be signed.

Optionally, the marking module 306 is specifically configured to:

searching the positions of other basic signature keywords on other basic files to be signed;

and adding mapping labels at the positions of other basic signature keywords, wherein the mapping labels are label names of the target basic signature keywords.

Fig. 3 and fig. 4 describe the multiplexing apparatus for electronic signatures in the embodiment of the present invention in detail from the perspective of the modular functional entity, and the multiplexing apparatus for electronic signatures in the embodiment of the present invention is described in detail from the perspective of hardware processing.

Fig. 5 is a schematic structural diagram of an electronic signature multiplexing apparatus 500 according to an embodiment of the present invention, which may have a relatively large difference due to different configurations or performances, and may include one or more processors (CPUs) 510 (e.g., one or more processors) and a memory 520, and one or more storage media 530 (e.g., one or more mass storage devices) for storing applications 533 or data 532. Memory 520 and storage media 530 may be, among other things, transient or persistent storage. The program stored on the storage medium 530 may include one or more modules (not shown), each of which may include a series of instruction operations in the multiplexing device 500 for electronic signatures. Further, the processor 510 may be configured to communicate with the storage medium 530, and execute a series of instruction operations in the storage medium 530 on the electronic signature multiplexing device 500.

The electronically signed multiplexing device 500 may also include one or more power supplies 540, one or more wired or wireless network interfaces 550, one or more input-output interfaces 560, and/or one or more operating systems 531, such as Windows service, Mac OS X, Unix, Linux, FreeBSD, and the like. Those skilled in the art will appreciate that the electronic signature multiplexing device configuration shown in fig. 5 does not constitute a limitation of the electronic signature multiplexing device, and may include more or fewer components than those shown, or some components in combination, or a different arrangement of components.

The present invention also provides an electronic signature multiplexing device, where the computer device includes a memory and a processor, where the memory stores computer readable instructions, and the computer readable instructions, when executed by the processor, cause the processor to execute the steps of the electronic signature multiplexing method in the foregoing embodiments.

The present invention also provides a computer-readable storage medium, which may be a non-volatile computer-readable storage medium, and which may also be a volatile computer-readable storage medium, having stored therein instructions, which, when run on a computer, cause the computer to perform the steps of the method for multiplexing electronic signatures.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

The block chain is a novel application mode of computer technologies such as distributed data storage, point-to-point transmission, a consensus mechanism, an encryption algorithm and the like. A block chain (Blockchain), which is essentially a decentralized database, is a series of data blocks associated by using a cryptographic method, and each data block contains information of a batch of network transactions, so as to verify the validity (anti-counterfeiting) of the information and generate a next block. The blockchain may include a blockchain underlying platform, a platform product service layer, an application service layer, and the like.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A multiplexing method of electronic signatures is characterized by comprising the following steps:

acquiring a plurality of initial signature keywords and a plurality of corresponding initial signature keyword positions in a plurality of initial files to be signed, and hiding the initial signature keywords except the initial signature keyword positions by using a hiding function to obtain a plurality of basic files to be signed;

acquiring an electronic signature uploaded by a signer at the position of a target basic signature keyword in a target basic document to be signed, and generating a corresponding signature picture based on the electronic signature to obtain a target signed document;

generating an encrypted data string of the signature picture by adopting an asymmetric encryption algorithm, and assembling the signature picture and the encrypted data string to obtain integrated signature data;

transmitting the integrated signature data to other basic files to be signed, verifying the transmitted integrated signature data, and mapping the verified integrated signature data to positions of other basic signature keywords in the other basic files to be signed by using a preset mapping function to obtain a plurality of other signed files, wherein the other basic files to be signed are signed files except for the target basic file to be signed in the plurality of basic files to be signed, and the other basic signature keywords are signature keywords at corresponding positions in the other basic files to be signed;

and combining the target signing file with the other signing files to obtain a complete signing file.

2. The method for multiplexing electronic signatures according to claim 1, wherein the obtaining of the plurality of initial signature keywords and the corresponding plurality of initial signature keyword positions in the plurality of initial files to be signed and the hiding of the initial signature keywords except for the initial signature keyword positions by using a hiding function to obtain the plurality of basic files to be signed comprises:

inquiring initial signature keywords except the positions of the initial signature keywords in the plurality of initial files to be signed to obtain a plurality of signature keywords to be hidden;

and adding preset hidden labels behind the positions of the plurality of keywords of the signatures to be hidden by using a hidden function to complete the hiding of the plurality of signatures to be hidden, thereby obtaining a plurality of basic documents to be signed.

3. The method for multiplexing electronic signatures according to claim 1, wherein the generating an encrypted data string of the signature picture by using an asymmetric encryption algorithm, and assembling the signature picture and the encrypted data string to obtain integrated signature data comprises:

calculating the hash value of the signature picture by using a first preset formula and a second preset formula in an asymmetric encryption algorithm to generate an encrypted data string of the signature picture, wherein the first preset formula is as follows: r ═ g^kmodp) modq, the second preset formula being: s ═ k (k)^-1(h (m) + xr)) modq, where r represents the first encrypted data string and p represents a randomly generated first prime number in the range of 2¹⁰²³<p<2¹⁰²⁴Q represents a first derived prime number, wherein (p-1) modq ═ 0, and 2¹⁵⁹<q<2¹⁶⁰And g represents a second derivative prime number, wherein g ═ h^(p-1)Qmomp, h represents the second element number generated randomly, and 1<h<(p-1)，g>1, k denotes a temporary key, s denotes a second encrypted data string, h (m) denotes a hash value of a signature picture, x denotes a private key, specifically a random number or a pseudo-random number, and 0<x<q；

4. The method for multiplexing electronic signatures according to claim 1, wherein the transmitting the integrated signature data to other basic documents to be signed, verifying the transmitted integrated signature data, and mapping the verified integrated signature data to positions of other basic signature keywords in the other basic documents to be signed by using a preset mapping function to obtain a plurality of other signed documents, where the other basic documents to be signed are signed documents other than the target basic document to be signed in the plurality of basic documents to be signed, and the other basic signature keywords are signature keywords at corresponding positions in the other basic documents to be signed include:

transmitting the integrated signature data to other basic files to be signed, and verifying the transmitted integrated signature data to obtain verified integrated signature data;

searching mapping labels preset at positions of other basic signature keywords in the other basic files to be signed, wherein the other basic signature keywords are signature keywords at corresponding positions in the other basic files to be signed;

and mapping the verified integrated signature data to the position of the mapping label through a preset mapping function to complete the signing of the other basic files to be signed so as to obtain a plurality of other signed files, wherein the other basic files to be signed are signed files in the plurality of basic files to be signed except the target basic file to be signed.

5. The method for multiplexing electronic signatures according to claim 3, wherein the transmitting the integrated signature data to other basic documents to be signed and verifying the transmitted integrated signature data to obtain verified integrated signature data comprises:

transmitting the integrated signature data to other basic files to be signed, and respectively calculating a first decrypted data string and a second decrypted data string of the transmitted integrated signature data according to a first verification formula and a second verification formula, wherein the first verification formula is as follows: u. of₁＝[H(M)×((s')^-1modq)]modq, the second verification equation is: u. of₂＝[r'×((s')^-1modq)]modq, where u₁Denotes a first decrypted data string, h (m) denotes a hash value of a signature picture in the integrated signature data after transmission, s' denotes a second encrypted data string in the integrated signature data after transmission, q denotes a first derived prime number, where (p-1) modq ═ 0, and 2¹⁵⁹<q<2¹⁶⁰And p represents a randomly generated first prime number in the range of 2¹⁰²³<p<2¹⁰²⁴，u₂Representing the second decrypted data string, r' representing the first encrypted data string in the transmitted integrated signature data;

according to a third preset formula,The first decrypted data string and the second decrypted data string calculate verification signature data of the transmitted integrated signature data, and the third preset formula is as follows:

wherein v denotes verification signature data and g denotes a second derivative prime number, where g ═ h^(p-1)Qmomp, h represents the second element number generated randomly, and 1<h<(p-1)，g>1, p denotes a randomly generated first prime number in the range of 2¹⁰²³<p<2¹⁰²⁴Q represents a first derived prime number, wherein (p-1) modq ═ 0, and 2¹⁵⁹<q<2¹⁶⁰，u₁Representing a first decrypted data string, u₂Y denotes a second decrypted data string, y denotes a public key, and y is g^xmodp, x denotes that the private key is specifically a random or pseudo-random number, and 0<x<q；

6. The method for multiplexing electronic signatures according to any one of claims 1 to 5, wherein after the electronic signature uploaded by a signer is obtained at the position of the target basic signature keyword in the target basic document to be signed, and a corresponding signature picture is generated based on the electronic signature, so as to obtain a target signed document, before the encrypted data string of the signature picture is generated by using an asymmetric encryption algorithm, and the signature picture and the encrypted data string are assembled, so as to obtain the integrated signature data, the method for multiplexing electronic signatures further comprises:

and marking the target basic signature keyword on the position of the other basic signature keywords through a mapping function on the other basic documents to be signed.

7. The method for multiplexing electronic signatures according to claim 6, wherein the marking the target basic signature keyword at the position of the other basic signature keyword by the mapping function on the other basic document to be signed comprises:

searching the positions of the other basic signature keywords on the other basic documents to be signed;

and adding a mapping label at the position of the other basic signature keywords, wherein the mapping label is the label name of the target basic signature keyword.

8. An apparatus for multiplexing electronic signatures, comprising:

the hidden module is used for acquiring a plurality of initial signature keywords and a plurality of corresponding initial signature keyword positions in a plurality of initial files to be signed, and hiding the initial signature keywords except the initial signature keyword positions by using a hidden function to obtain a plurality of basic files to be signed;

the acquisition module is used for acquiring the electronic signature uploaded by the signer at the position of the target basic signature keyword in the target basic document to be signed, and generating a corresponding signature picture based on the electronic signature to obtain the target signed document;

the encryption module is used for generating an encrypted data string of the signature picture by adopting an asymmetric encryption algorithm and assembling the signature picture and the encrypted data string to obtain integrated signature data;

the verification module is used for transmitting the integrated signature data to other basic files to be signed, verifying the transmitted integrated signature data, and mapping the verified integrated signature data to the positions of other basic signature keywords in the other basic files to be signed by using a preset mapping function to obtain a plurality of other signed files, wherein the other basic files to be signed are signed files in the plurality of basic files to be signed except for the target basic file to be signed, and the other basic signature keywords are signature keywords at corresponding positions in the other basic files to be signed;

and the integration module is used for combining the target signing file with the other signing files to obtain a complete signing file.

9. An electronic signature multiplexing device, characterized in that the electronic signature multiplexing device comprises: a memory and at least one processor, the memory having instructions stored therein;

the at least one processor invokes the instructions in the memory to cause the electronic signature multiplexing device to perform the electronic signature multiplexing method of any one of claims 1-7.

10. A computer-readable storage medium having instructions stored thereon, wherein the instructions, when executed by a processor, implement a method for multiplexing an electronic signature according to any one of claims 1 to 7.