CN111191263A - Pdf electronic signature method and system - Google Patents
Pdf electronic signature method and system Download PDFInfo
- Publication number
- CN111191263A CN111191263A CN201911398563.XA CN201911398563A CN111191263A CN 111191263 A CN111191263 A CN 111191263A CN 201911398563 A CN201911398563 A CN 201911398563A CN 111191263 A CN111191263 A CN 111191263A
- Authority
- CN
- China
- Prior art keywords
- signature
- information
- pdf file
- signed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/60—Protecting data
- G06F21/602—Providing cryptographic facilities or services
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/60—Protecting data
- G06F21/64—Protecting data integrity, e.g. using checksums, certificates or signatures
Abstract
The invention discloses a PDF electronic signature method and a system based on Javascript files, wherein the method comprises the following steps: acquiring a PDF file to be signed and seal information used for sealing the PDF file to be signed; previewing the PDF file to be signed by using Javascript PDF; analyzing the PDF file to be signed and extracting signature summary information; and signing and storing the signature abstract information by using a secret key segmentation technology to generate a signature PDF file. According to the PDF electronic contract signing method and system based on the Javascript file, browser plug-ins are not required to be installed when electronic contract signing is carried out in browsing, browser plug-ins are not required, and Pdf electronic contract signing can be achieved only by introducing the Javascript file.
Description
Technical Field
The invention relates to the technical field of electronic signature, in particular to a PDF electronic signature method and system based on Javascript files.
Background
The PDF electronic contract signature is a technology for directly signing and sealing an electronic document by utilizing a Hash algorithm and an encryption algorithm. In order to ensure legal validity of the signed electronic document, the electronic document signed by using the electronic signature also needs to have the characteristics of identifiable signing identity and untrustworthy signing content.
At present, the PDF electronic contract signature technology mainly uses Ukey and server signature. The Ukey signature is very safe because the private key is in the hand of the user. But the device needs to be carried around, and a ukey drive needs to be installed on the used device; the signature in the webpage depends on browser plug-ins which are incompatible. With the server side signature, the private key is at the server side, the implementation is simple but there is a security problem, for example, the service provider can obtain the private key.
In the prior art, although an implementation party for implementing electronic contract signature in a webpage based on key division also exists, a plug-in needs to be installed, the plug-in cannot be used on a browser without the plug-in, and meanwhile, the compatibility problem exists.
Disclosure of Invention
In view of this, an object of the present application is to provide a method and a system for PDF electronic signature based on Javascript files, so as to solve the technical problem in the prior art that the cosmic ray channel count has a large deviation.
In view of the above, in a first aspect of the present application, there is provided a method for PDF electronic signature based on Javascript, including:
acquiring a PDF file to be signed and seal information used for sealing the PDF file to be signed;
previewing the PDF file to be signed by using Javascript PDF;
analyzing the PDF file to be signed and extracting signature summary information;
and signing and storing the signature abstract information by using a secret key segmentation technology to generate a signature PDF file.
In some embodiments, before the obtaining the PDF file to be signed and the seal information used for stamping on the PDF file to be signed, the method further includes:
and responding to the detected login information of the current user, and acquiring a seal list of the current user.
In some embodiments, the obtaining the PDF file to be signed and the seal information when the PDF file to be signed is used for sealing includes:
acquiring a PDF file to be signed;
and responding to the selection instruction of the current user, and selecting corresponding seal information from the seal list as seal information for stamping on the PDF file to be signed.
In some embodiments, the parsing the PDF file to be signed and extracting signature summary information includes:
and creating a signature domain in the PDF file to be signed, adding the seal information into the signature domain, and generating signature summary information.
In some embodiments, further comprising:
creating a signature event;
the signing and storing the signature summary information by using a secret key segmentation technology to generate a signature PDF file, which specifically comprises the following steps:
and responding to the first signature event, receiving encrypted signature information, adding the encrypted signature information into the signature domain, signing and storing the signature summary information, and generating a signature PDF file.
In some embodiments, the cryptographic signature information is generated by:
responding to a first signature event, the terminal sends first sub-encrypted signature information to the server, and after receiving the first sub-encrypted signature information, the server adds second sub-encrypted signature information stored by the server on the basis of the first sub-encrypted signature information to generate encrypted signature information.
In some embodiments, the receiving encrypted signature information in response to the first signature event, adding the encrypted signature information to the signature field, signing and saving the signature digest information, and generating a signature PDF file specifically includes:
responding to a first signature event, receiving encrypted signature information, adding the encrypted signature information into the signature domain, inquiring whether the encrypted signature information is successfully added into the signature domain in a polling mode, signing and storing the signature abstract information after the encrypted signature information is successfully added into the signature domain, and generating a signature PDF file.
In view of the above, in a second aspect of the present application, there is provided a PDF electronic signature system based on Javascript files, including:
the seal information acquisition module is used for acquiring a PDF file to be signed and seal information used for stamping on the PDF file to be signed;
the PDF file preview module is used for previewing the PDF file to be signed by using Javascript PDF;
the signature abstract information extraction module is used for analyzing the PDF file to be signed and extracting signature abstract information;
and the signature PDF file generating module is used for signing and storing the signature summary information by using a secret key segmentation technology to generate a signature PDF file.
In some embodiments, further comprising:
and the seal list acquisition module is used for acquiring the seal list of the current user.
In some embodiments, the stamp information obtaining module is specifically configured to:
acquiring a PDF file to be signed;
and responding to the selection instruction of the current user, and selecting corresponding seal information from the seal list as seal information for stamping on the PDF file to be signed.
According to the PDF electronic contract signing method and system based on the Javascript file, browser plug-ins are not required to be installed when electronic contract signing is carried out in browsing, browser plug-ins are not required, and Pdf electronic contract signing can be achieved only by introducing the Javascript file.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
Fig. 1 is a flowchart of a PDF electronic signature method based on a Javascript file according to an embodiment of the present application;
fig. 2 is a flowchart of a PDF electronic signature method based on Javascript files according to a second embodiment of the present application;
fig. 3 is a schematic structural diagram of a PDF electronic signature system based on Javascript files according to a third embodiment of the present application.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.
The PDF electronic contract signing method and system based on the Javascript file can be applied to key division signing of a webpage version, the problem that browser plug-ins need to be installed when electronic contract signing is carried out in browsing is solved, browser plug-ins are not needed, and Pdf electronic contract signing can be achieved only by introducing the Javascript file. jsPDF is a client solution based on HTML5 for generating PDF documents for various purposes.
Specifically, as shown in fig. 1, a flowchart of a PDF electronic signature method based on a Javascript file according to an embodiment of the present application is shown. As shown in fig. 1, the method of this embodiment may include the following steps:
s101: acquiring a PDF file to be signed and seal information used for sealing the PDF file to be signed.
In this embodiment, when a user needs to sign a PDF file, and when the user needs to stamp an electronic file in a PDF format, the PDF file to be signed may be opened through a file control in a hyperlink html in a browser, so as to obtain byte information in the PDF file to be signed. Meanwhile, the identity information of the user and the corresponding seal information can be obtained, the identity information of the user can be the account information of the user, the account information of the user can correspond to a plurality of seal information, the seal information can be, for example, a seal picture, and the seal information needing to be signed on the PDF file to be signed is the corresponding seal information mentioned in the embodiment of the application.
S102: and previewing the PDF file to be signed by using Javascript PDF.
When the PDF file to be signed is opened through a file control in the html, the PDF file to be signed can be previewed by using Javascript PDF.
S103: and analyzing the PDF file to be signed, and extracting signature abstract information.
In this embodiment, after previewing the PDF file to be signed by using javascript PDF, a signature domain in the PDF file to be signed, that is, an area where a user needs to sign and stamp, may be determined, then add corresponding seal information to the signature domain in the PDF file to be signed, and generate signature summary information according to the signature domain to which the seal information is added, where the signature summary information may be image information of the signature domain to which the seal information is added.
S104: and signing and storing the signature abstract information by using a secret key segmentation technology to generate a signature PDF file.
After the signature digest information is extracted, the signature digest information needs to be encrypted and signed, so that the identity information of the user is uniquely determined through the signature, and the encrypted signature of the signature digest information has a unique identification mark, namely, the encrypted signature is uniquely corresponding to the identity information of the user. According to the embodiment of the application, the signature abstract information is signed by using a secret key segmentation technology and is stored after being signed, so that the signed PDF file is generated. For a specific implementation method of the key segmentation technique, refer to the following embodiments, which are not described in detail herein.
According to the PDF electronic contract signing method based on the Javascript file, browser plug-ins are not required to be installed when electronic contract signing is carried out in browsing, browser plug-ins are not required, and Pdf electronic contract signing can be achieved only by introducing the Javascript file.
Fig. 2 is a flowchart of a PDF electronic signature method based on Javascript files according to a second embodiment of the present application. The method of the embodiment comprises the following steps:
s201: and responding to the detected login information of the current user, and acquiring a seal list of the current user.
In this embodiment, when a user needs to sign a PDF file through a web browser, the user is usually required to input corresponding account information, and the web browser searches and acquires a seal list of the user after detecting login information of the user. In general, each user may store a plurality of seals in advance, and different seals have different functions, that is, different types of files are signed. When a user needs to stamp a PDF file to be signed, a corresponding stamp needs to be selected from a stamp list, so that a stamp list of the current user needs to be obtained first. And after the PDF file to be signed is obtained, responding to the selection instruction of the current user, and selecting corresponding seal information from the seal list as the seal information for stamping on the PDF file to be signed.
S202: acquiring a PDF file to be signed and seal information used for sealing the PDF file to be signed.
S203: and previewing the PDF file to be signed by using Javascript PDF.
S204: and analyzing the PDF file to be signed, and extracting signature abstract information.
S205: and signing and storing the signature abstract information by using a secret key segmentation technology to generate a signature PDF file.
The specific implementation process of step S202 to step S205 in this embodiment is similar to the specific implementation process of step S101 to step S104 in the first embodiment, and such details are not repeated.
According to the PDF electronic contract signing method based on the Javascript file, browser plug-ins are not required to be installed when electronic contract signing is carried out in browsing, browser plug-ins are not required, and Pdf electronic contract signing can be achieved only by introducing the Javascript file.
In addition, as an optional embodiment of the present application, on the basis of the above embodiment, after extracting the signature summary information, a signature event may be further created;
the signing and storing the signature summary information by using a secret key segmentation technology to generate a signature PDF file, which specifically comprises the following steps:
and responding to the first signature event, receiving encrypted signature information, adding the encrypted signature information into the signature domain, signing and storing the signature summary information, and generating a signature PDF file.
The encrypted signature information may specifically be generated by the following steps:
responding to a first signature event, the terminal sends first sub-encrypted signature information to the server, and after receiving the first sub-encrypted signature information, the server adds second sub-encrypted signature information stored by the server on the basis of the first sub-encrypted signature information to generate encrypted signature information. The webpage end responds to the first signature event at the same time, receives encrypted signature information, adds the encrypted signature information into the signature domain, signs and stores the signature summary information, and generates a signature PDF file, which specifically comprises the following steps:
responding to a first signature event, receiving encrypted signature information, adding the encrypted signature information into the signature domain, inquiring whether the encrypted signature information is successfully added into the signature domain in a polling mode, signing and storing the signature abstract information after the encrypted signature information is successfully added into the signature domain, and generating a signature PDF file.
In the key division technique in this embodiment, the key generation principle is as follows:
the client a generates its own sub-private key dA: the client A generates a random number between [1, n-1], and the generated random number is taken as dA, namely: dA ∈ [1, n-1], where n denotes the order of the base point G of the elliptic curve;
the server B generates a sub private key dB of the server B: the server B generates a random number between [1, n-1], and the generated random number is used as dB;
the client A and the server B agree a positive integer m, wherein m is more than or equal to 112;
the client A generates m-1 random numbers between [1, n-1], takes the generated random numbers as xi, calculates and takes a symbol u, and makes u equal to 0; namely, the method comprises the following steps: xi is E [0, n-1 ]; where mod n represents a modulo n operation;
the server B generates m-1 random numbers between [1, n-1], takes the generated random numbers as yi, calculates and generates a random number between [1, n-1], and takes the generated random number as v;
namely, the method comprises the following steps: yi ∈ [0, n-1 ];
v∈[1,n-1]；
1, 2.. said., m performs the following process:
the client A generates a random number of 0 or 1, records the generated random number as k, generates a random number between [1, n-1], records the generated random number as r, and lets hk equal to xi, and sends (h0, h1) to the server B;
namely, the method comprises the following steps: k belongs to {0,1 };
r∈[1,n-1]。
wherein, the exclusive OR operation of two bit strings with equal length according to bits is represented;
the server B calculates (h0+ yi) v-1modn, the calculation result is recorded as f0, (h1+ yi) v-1modn, and the calculation result is recorded as f 1;
namely, the method comprises the following steps: f0 ═ h0+ yi) v-1 modn;
f1＝(h1+yi)v-1modn；
wherein v-1modn represents a unique integer y such that v.y ≡ 1(modn) holds, 1 ≦ y ≦ n-1;
the server B generates a random number between [1, n-1], records the generated random number as X, calculates [ X ] G, records the calculation result as X, and sends the X to the client A;
namely, the method comprises the following steps: x is belonged to [1, n-1 ];
X＝[x]G。
wherein [ x ] G represents a point on the elliptic curve at x times the point G, x being a positive integer;
the client A generates a random number between [1, n-1], records the generated random number as y, calculates [ yG ], records the calculation result as F, calculates H (F), and records the calculation result as key;
namely, the method comprises the following steps: y belongs to [1, n-1 ];
F＝[y]G；
key＝H(F)。
wherein H is a cryptographic hash function;
if k is equal to 0, Y is equal to F, if k is not equal to 0, Y is equal to X + F, and Y is sent to the server B;
the server B calculates H ([ X ] Y), records the calculation result as k0, calculates H ([ X ] (Y-X)), records the calculation result as k1, calculates the calculation result as C0, calculates the calculation result as C1, and sends C0 and C1 to the client A;
namely, the method comprises the following steps: k0 ═ H ([ x ] Y);
k1＝H([x](Y-X))；
the client A calculates and records the calculation result as fk, calculates u + fkmodn, and records the calculation result as u;
namely, the method comprises the following steps: p ═ v-1] ([ u-1] G) -G;
the server side B sends the [ v-1] G to the client side A, and the client side A calculates a signature public key [ u-1] ([ v-1] G) -G which is marked as P;
namely, the method comprises the following steps: p ═ u-1] ([ v-1] G) -G.
The principle of signing the signature abstract information by using the key segmentation technology is as follows:
the client A generates a message digest e and a first part signature Q1 of the message M to be signed, and sends the e and the first part signature to the server B;
the server B generates a second partial signature r and a third partial signature s1, and sends r and s1 to the first partial client A;
the client A generates and outputs a complete signature (r, s) according to Q1, r and s 1.
The method for generating the message digest e and the first partial signature Q1 of the message M to be signed by the client A and sending the e and the first partial signature Q1 to the server B comprises the following steps:
the client A calculates H (Z | | | M), the calculation result is recorded as e, a random number between [1, n-1] is generated, the calculation result is recorded as k1, [ k1] (P + G) is calculated, the calculation result is recorded as Q1, and e and Q1 are sent to the server B, wherein M is a message to be signed, and Z is a hash value calculated by using a cryptographic hash function H for information such as user identification, identification length, elliptic curve parameters and a user signature public key according to an SM2 algorithm.
The server B generates a second partial signature r and a third partial signature s1, and sends r and s1 to the first partial client A, and the method comprises the following steps:
the server B generates a random number between [1, n-1], records the calculation result as k2, calculates an elliptic curve point [ k2] (P + G) + [ k1] (P + G), records the calculation result as (x1, y1), calculates (e + x1) modn, records the calculation result as r, wherein if r is 0, the step 9 is returned, otherwise, calculates k2+ rdbmode, records the calculation result as s1, and sends r, s1 to the client a.
The client A generates and outputs a complete signature (r, s) according to the Q1, the r and the s1, and comprises:
the client a calculates k1+ rdA + s1-rmodn, and records the calculation result as s, wherein if s is 0 or r + s is 0modn, the steps of returning to the client a to generate the message digest e and the first partial signature Q1 of the message M to be signed are performed with recalculation, otherwise, the digital signature of the message M is (r, s).
The method of the embodiment of the present application can achieve similar technical effects to those of the above embodiments, and details thereof are not repeated.
Fig. 3 is a schematic structural diagram of a PDF electronic signature system based on Javascript files according to a third embodiment of the present application. The PDF electronic signature system based on Javascript files of this embodiment includes:
a seal information obtaining module 301, configured to obtain a PDF file to be signed and seal information used for sealing the PDF file to be signed;
a PDF file preview module 302, configured to preview the PDF file to be signed by using javascript PDF;
the signature abstract information extraction module 303 is configured to analyze the PDF file to be signed and extract signature abstract information;
and a signature PDF file generating module 304, configured to sign and store the signature digest information by using a key segmentation technique, and generate a signature PDF file.
In addition, a stamp list obtaining module (not shown in the figure) may be further included, configured to obtain the stamp list of the current user. Specifically, a PDF file to be signed is obtained;
and responding to the selection instruction of the current user, and selecting corresponding seal information from the seal list as seal information for stamping on the PDF file to be signed.
The system of the present embodiment can achieve similar technical effects as those of the method embodiments described above, and such descriptions are not repeated.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (10)
1. A PDF electronic signature method based on Javascript files is characterized by comprising the following steps:
acquiring a PDF file to be signed and seal information used for sealing the PDF file to be signed;
previewing the PDF file to be signed by using Javascript PDF;
analyzing the PDF file to be signed and extracting signature summary information;
and signing and storing the signature abstract information by using a secret key segmentation technology to generate a signature PDF file.
2. The method according to claim 1, further comprising, before the obtaining the PDF file to be signed and the seal information used for sealing on the PDF file to be signed, the steps of:
and responding to the detected login information of the current user, and acquiring a seal list of the current user.
3. The method according to claim 2, wherein the obtaining of the PDF file to be signed and the seal information when used for sealing the PDF file to be signed comprises:
acquiring a PDF file to be signed;
and responding to the selection instruction of the current user, and selecting corresponding seal information from the seal list as seal information for stamping on the PDF file to be signed.
4. The method according to claim 3, wherein the parsing the PDF file to be signed and extracting signature summary information includes:
and creating a signature domain in the PDF file to be signed, adding the seal information into the signature domain, and generating signature summary information.
5. The method of claim 4, further comprising:
creating a signature event;
the signing and storing the signature summary information by using a secret key segmentation technology to generate a signature PDF file, which specifically comprises the following steps:
and responding to the first signature event, receiving encrypted signature information, adding the encrypted signature information into the signature domain, signing and storing the signature summary information, and generating a signature PDF file.
6. The method of claim 5, wherein the cryptographic signature information is generated by:
responding to a first signature event, the terminal sends first sub-encrypted signature information to the server, and after receiving the first sub-encrypted signature information, the server adds second sub-encrypted signature information stored by the server on the basis of the first sub-encrypted signature information to generate encrypted signature information.
7. The method of claim 5, wherein the receiving encrypted signature information in response to a first signature event, adding the encrypted signature information to the signature field, signing and saving the signature digest information, and generating a signature PDF file comprises:
responding to a first signature event, receiving encrypted signature information, adding the encrypted signature information into the signature domain, inquiring whether the encrypted signature information is successfully added into the signature domain in a polling mode, signing and storing the signature abstract information after the encrypted signature information is successfully added into the signature domain, and generating a signature PDF file.
8. A PDF electronic signature system based on Javascript files is characterized by comprising the following components:
the seal information acquisition module is used for acquiring a PDF file to be signed and seal information used for stamping on the PDF file to be signed;
the PDF file preview module is used for previewing the PDF file to be signed by using Javascript PDF;
the signature abstract information extraction module is used for analyzing the PDF file to be signed and extracting signature abstract information;
and the signature PDF file generating module is used for signing and storing the signature summary information by using a secret key segmentation technology to generate a signature PDF file.
9. The system of claim 8, further comprising:
and the seal list acquisition module is used for acquiring the seal list of the current user.
10. The system according to claim 9, wherein the stamp information obtaining module is specifically configured to:
acquiring a PDF file to be signed;
and responding to the selection instruction of the current user, and selecting corresponding seal information from the seal list as seal information for stamping on the PDF file to be signed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911398563.XA CN111191263A (en) | 2019-12-30 | 2019-12-30 | Pdf electronic signature method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911398563.XA CN111191263A (en) | 2019-12-30 | 2019-12-30 | Pdf electronic signature method and system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111191263A true CN111191263A (en) | 2020-05-22 |
Family
ID=70709690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911398563.XA Pending CN111191263A (en) | 2019-12-30 | 2019-12-30 | Pdf electronic signature method and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111191263A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112214782A (en) * | 2020-11-17 | 2021-01-12 | 支付宝(杭州)信息技术有限公司 | Electronic document signature method, device and equipment |
| CN112307520A (en) * | 2020-11-09 | 2021-02-02 | 语联网（武汉）信息技术有限公司 | Electronic seal adding and verifying method and system |
| CN112529516A (en) * | 2020-11-10 | 2021-03-19 | 上海同在互联网科技有限公司 | Method, device and system for large-file online high-performance webpage electronic signature |
| CN112559938A (en) * | 2020-12-21 | 2021-03-26 | 深圳云之家网络有限公司 | Electronic seal file generation method and device, computer equipment and storage medium |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050177389A1 (en) * | 2004-02-10 | 2005-08-11 | Document Processing Systems, Inc. | Paperless process for mortgage closings and other applications |
| CN107623570A (en) * | 2017-11-03 | 2018-01-23 | 北京无字天书科技有限公司 | A kind of SM2 endorsement methods based on addition Secret splitting |
| CN107832624A (en) * | 2017-10-25 | 2018-03-23 | 济南浪潮高新科技投资发展有限公司 | A kind of visualization signature system and method based on block chain |
| CN109274503A (en) * | 2018-11-05 | 2019-01-25 | 北京仁信证科技有限公司 | Distributed collaboration endorsement method and distributed collaboration signature apparatus, soft shield system |
| CN109472165A (en) * | 2018-09-17 | 2019-03-15 | 深圳市佰仟金融服务有限公司 | A kind of electronic signature method and relevant device |
-
2019
- 2019-12-30 CN CN201911398563.XA patent/CN111191263A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050177389A1 (en) * | 2004-02-10 | 2005-08-11 | Document Processing Systems, Inc. | Paperless process for mortgage closings and other applications |
| CN107832624A (en) * | 2017-10-25 | 2018-03-23 | 济南浪潮高新科技投资发展有限公司 | A kind of visualization signature system and method based on block chain |
| CN107623570A (en) * | 2017-11-03 | 2018-01-23 | 北京无字天书科技有限公司 | A kind of SM2 endorsement methods based on addition Secret splitting |
| CN109472165A (en) * | 2018-09-17 | 2019-03-15 | 深圳市佰仟金融服务有限公司 | A kind of electronic signature method and relevant device |
| CN109274503A (en) * | 2018-11-05 | 2019-01-25 | 北京仁信证科技有限公司 | Distributed collaboration endorsement method and distributed collaboration signature apparatus, soft shield system |
Non-Patent Citations (1)
| Title |
|---|
| 邓高宇等: "基于iOS终端的SM2移动密码系统", 《软件》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112307520A (en) * | 2020-11-09 | 2021-02-02 | 语联网（武汉）信息技术有限公司 | Electronic seal adding and verifying method and system |
| WO2022095312A1 (en) * | 2020-11-09 | 2022-05-12 | 语联网（武汉）信息技术有限公司 | Electronic seal adding and verifying method and system |
| CN112529516A (en) * | 2020-11-10 | 2021-03-19 | 上海同在互联网科技有限公司 | Method, device and system for large-file online high-performance webpage electronic signature |
| CN112214782A (en) * | 2020-11-17 | 2021-01-12 | 支付宝(杭州)信息技术有限公司 | Electronic document signature method, device and equipment |
| CN112559938A (en) * | 2020-12-21 | 2021-03-26 | 深圳云之家网络有限公司 | Electronic seal file generation method and device, computer equipment and storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111191263A (en) | Pdf electronic signature method and system | |
| CN108040065B (en) | Login-free method and device after webpage skipping, computer equipment and storage medium | |
| JP4993674B2 (en) | Information processing apparatus, verification processing apparatus, control method thereof, computer program, and storage medium | |
| CN111835511A (en) | Data security transmission method and device, computer equipment and storage medium | |
| US20100037062A1 (en) | Signed digital documents | |
| CN111368335A (en) | Electronic signature method of PDF (Portable document Format) file and electronic signature verification method and system | |
| EP2173058B1 (en) | Context free and context sensitive XML digital signatures for SOAP messages | |
| US20200287934A1 (en) | Detecting realtime phishing from a phished client or at a security server | |
| US20140331062A1 (en) | System and apparatus for securely storing data | |
| US8656157B2 (en) | Method for sending and receiving an encrypted message and a system thereof | |
| WO2023071133A1 (en) | Tagged network information service generation and application method and apparatus, device and medium | |
| EP1848144B1 (en) | Data processing device and control method thereof | |
| CN103414727A (en) | Encryption protection system for input password input box and using method thereof | |
| CN115442047A (en) | Electronic signature method and system for business management file | |
| CN113452705B (en) | Encrypted communication method, device, electronic equipment and storage medium | |
| US7958363B2 (en) | Toolbar signature | |
| CN108718232A (en) | Image encryption method based on AES and chaos | |
| CN112671796A (en) | Google Driver cloud service authentication acquisition method, device, equipment and storage medium | |
| CN112307503A (en) | Signature management method and device and electronic equipment | |
| Thai | An encryption-authentication algorithms developed from the elgamal cryptosystem | |
| CN109450643B (en) | Signature verification method realized on Android platform based on native service | |
| CN115022042A (en) | Compliance code verification method for protecting data privacy and computer readable medium | |
| US20060053155A1 (en) | Signature generating method, signature verifying method, and information processing device | |
| CN112954388A (en) | Data file acquisition method and device, terminal equipment and storage medium | |
| Manindra et al. | OTP Camouflaging using LSB Steganography and Public Key Cryptography |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200522 |
|
| RJ01 | Rejection of invention patent application after publication |