CN109450637B - Signature data management method and device of electronic perforation seal - Google Patents
Signature data management method and device of electronic perforation seal Download PDFInfo
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- CN109450637B CN109450637B CN201811209155.0A CN201811209155A CN109450637B CN 109450637 B CN109450637 B CN 109450637B CN 201811209155 A CN201811209155 A CN 201811209155A CN 109450637 B CN109450637 B CN 109450637B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/32—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
- H04L9/3247—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials involving digital signatures
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/32—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
- H04L9/3236—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials using cryptographic hash functions
Abstract
The invention discloses a signature data management method and a device of an electronic seal, wherein the method comprises the following steps: receiving an electronic seal signing instruction; acquiring an electronic document to be signed and an electronic seal; inserting a first seal control into a first page of the electronic document to be signed to obtain a first seal image block of the electronic seal falling on a side seam of the first page, and determining signature data of the first seal image block according to the electronic document to be signed; and inserting a seal control piece for each page of the electronic document to be signed except for the first page to obtain a second seal image block of the electronic seal falling on the edge seam of each page, and copying the signature data to obtain the signature data of each second signature data block. According to the scheme, after the signature data of the first seal image block is obtained, the signature data of the second signature image block can be directly copied to the signature data block of the first signature data block, so that the rapid signature of the electronic seal on the perforation is realized.
Description
Technical Field
The invention relates to the technical field of computers, in particular to a signature data management method and device of an electronic seal on a perforation.
Background
The electronic signature is a form of electronic signature, an image processing technology is utilized to convert an electronic signature operation into a visual effect which is the same as that of a paper document stamping operation, and meanwhile, the electronic signature technology is utilized to guarantee the authenticity and integrity of electronic information and the undeniability of a signer.
For paper documents comprising a plurality of pages, in order to avoid the need to stamp each page in order to replace several pages of paper, the edges of the document may be stitched together and stamped, such a stamp being known as a perforation stamp. The electronic seal can be obtained by applying the electronic signature to the seal, and can bring more vivid and visual seal effects of multi-page documents besides meeting the characteristic that the electronic signature protects the authenticity and integrity of the electronic document.
In the process of carrying out electronic seal signing on an electronic document, a complete seal image is cut into a plurality of seal image blocks according to the requirement of multi-page sealing by relying on an image processing technology, and then the corresponding seal image blocks are deployed at the designated positions of all pages, in order to ensure that the seal image blocks can form a complete electronic seal, signature data are required to be set for each seal image block, and how to realize effective management of the signature data of the electronic seal is a problem which needs to be solved urgently at present.
Disclosure of Invention
The embodiment of the invention provides a signature data management method and device of an electronic seal on the perforation, which are used for realizing effective management of the signature data of the electronic seal on the perforation.
According to an embodiment of the present invention, there is provided a signature data management method for an electronic seal, including:
receiving an electronic seal signing instruction;
acquiring an electronic document to be signed and an electronic seal;
inserting a first seal control into a first page of the electronic document to be signed to obtain a first seal image block of the electronic seal falling on a side seam of the first page, and determining signature data of the first seal image block according to the electronic document to be signed; and inserting a seal control piece for each page of the electronic document to be signed except for the first page to obtain a second seal image block of the electronic seal falling on the edge seam of each page, and copying the signature data to obtain the signature data of each second signature data block.
Specifically, determining the signature data of the first seal image block according to the electronic document to be signed specifically includes:
setting a first signature corresponding to the electronic document to be signed;
carrying out Hash operation on the electronic document to be signed to obtain first signature data corresponding to the electronic document to be signed;
and taking the first signature identification and the first signature data as signature data of the first seal image block.
Optionally, the method further includes:
receiving an electronic seal checking instruction;
acquiring an electronic seal to be verified and an electronic document of the seal to be verified;
acquiring second signature data of the electronic seal to be verified;
performing hash operation on the electronic document to be checked to obtain third signature data corresponding to the electronic document to be checked;
determining whether the electronic seal to be verified is valid according to the second signature data and the third signature data;
acquiring a second signature of the electronic seal to be verified;
and adding an identifier which is effective or not in the signature data carrying the second signature identifier.
Specifically, determining whether the electronic seal to be verified is valid according to the second signature data and the third signature data specifically includes:
determining whether the second signature data is the same as the third signature data;
if the second signature data is the same as the third signature data, determining that the electronic seal to be verified is valid;
and if the second signature data is different from the third signature data, determining that the electronic seal to be verified is invalid.
Optionally, the method further includes:
receiving an electronic seal-perforation deleting instruction;
acquiring a third signature of the electronic seal to be deleted;
and deleting the signature data carrying the third signature and the seal image block of the electronic seal to be deleted.
According to an embodiment of the present invention, there is also provided a signature data management apparatus for an electronic seal, including:
the receiving module is used for receiving an electronic seal signing instruction;
the acquisition module is used for acquiring the electronic document to be signed and the electronic seal;
the signature module is used for inserting a first seal control into a first page of the electronic document to be signed to obtain a first seal image block of the electronic seal falling on a side seam of the first page, and determining signature data of the first seal image block according to the electronic document to be signed; and inserting a seal control into each page of the electronic document to be signed except for the first page to obtain a second seal image block of the electronic seal falling on the edge seam of each page, and copying the signature data to obtain the signature data of each second signature data block.
Specifically, the signature module is specifically configured to:
setting a first signature corresponding to the electronic document to be signed;
carrying out Hash operation on the electronic document to be signed to obtain first signature data corresponding to the electronic document to be signed;
and taking the first signature identification and the first signature data as signature data of the first seal image block.
Optionally, the system further comprises a seal checking module, wherein:
the receiving module is also used for receiving an electronic seal-riding seal checking instruction;
the acquisition module is also used for acquiring the electronic seal to be verified and the electronic document to be verified; acquiring second signature data of the electronic seal to be verified;
the seal checking module is used for performing hash operation on the electronic document to be checked to obtain third signature data corresponding to the electronic document to be checked; determining whether the electronic seal to be verified is valid according to the second signature data and the third signature data; acquiring a second signature of the electronic seal to be checked; and adding an effective identifier in the signature data carrying the second signature identifier.
Specifically, the seal checking module is specifically configured to:
determining whether the second signature data is the same as the third signature data;
if the second signature data is the same as the third signature data, determining that the electronic seal to be verified is valid;
and if the second signature data is different from the third signature data, determining that the electronic seal to be verified is invalid.
Optionally, the system further includes a deletion module, wherein:
the receiving module is also used for receiving an electronic seal-perforation deleting instruction;
the acquisition module is also used for acquiring a third signature of the electronic seal to be deleted;
and the deleting module is used for deleting the signature data carrying the third signature and the seal image block of the electronic seal to be deleted.
The invention has the following beneficial effects:
the embodiment of the invention provides a signature data management method and device of an electronic seal, which receives an electronic seal signature instruction; acquiring an electronic document to be signed and an electronic seal; inserting a first seal control into a first page of the electronic document to be signed to obtain a first seal image block of the electronic seal falling on a side seam of the first page, and determining signature data of the first seal image block according to the electronic document to be signed; and inserting a seal control piece for each page of the electronic document to be signed except for the first page to obtain a second seal image block of the electronic seal falling on the edge seam of each page, and copying the signature data to obtain the signature data of each second signature data block. According to the scheme, after the signature data of the first seal image block is obtained, the signature data of the following second seal image block can be directly copied to the signature data of the first seal image block, so that the rapid signature of the electronic seal on the perforation is realized.
Drawings
FIG. 1 is a flowchart of a signature method of an electronic seal according to an embodiment of the present invention;
FIG. 2 is a flowchart of S13 in an embodiment of the present invention;
FIG. 3 is a flowchart of a seal verification method for an electronic seal according to an embodiment of the present disclosure;
FIG. 4 is a flowchart of a method for deleting signatures of an electronic seal according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a signature data management device of an electronic seal according to an embodiment of the present invention.
Detailed Description
In order to realize effective management of signature data of an electronic seal, the embodiment of the invention provides a signature data management method of the electronic seal, the flow of the method is shown in fig. 1, and the method specifically comprises the following execution steps:
s11: and receiving an electronic seal signing instruction.
An electronic seal-on-perforation signature button can be arranged, and when the electronic seal-on-perforation signature button is triggered, the electronic seal-on-perforation signature command is received.
S12: and acquiring the electronic document to be signed and the electronic seal.
S13: inserting a first seal control into a first page of an electronic document to be signed to obtain a first seal image block of an electronic seal falling on a side seam of the first page, and determining signature data of the first seal image block according to the electronic document to be signed; and inserting a seal control into each page of the electronic document to be signed except the first page to obtain a second seal image block of the electronic seal falling on the edge seam of each page, and copying the signature data to obtain the signature data of each second signature data block.
According to the scheme, after the signature data of the first seal image block is obtained, the signature data of the second signature image block can be directly copied to the signature data block of the first signature data block, so that the rapid signature of the electronic seal on the perforation is realized.
Specifically, in the step S13, the signature data of the first seal image block is determined according to the electronic document to be signed, and the implementation process is as shown in fig. 2, and specifically includes:
s131: and setting a first signature mark corresponding to the electronic document to be signed.
The signature mark corresponding to the electronic document to be signed can be set according to actual needs, and the signature mark is defined as a first signature mark, and specifically can be an Arabic number, a letter, a punctuation mark and the like or various possible combinations.
S132: and carrying out Hash operation on the electronic document to be signed to obtain first signature data corresponding to the electronic document to be signed.
The electronic document to be signed can be subjected to hash operation according to the content of the electronic document to be signed, the obtained hash value can be used as signature data corresponding to the electronic document to be signed, the signature data is defined as first signature data, and the first signature data is obtained by carrying out hash operation according to the content of the electronic document to be signed, so that the security is high, and the electronic document to be signed can be effectively protected.
S133: and taking the first signature identification and the first signature data as signature data of the first seal image block.
The signature data of the first seal image block may include an electronic seal identifier, a signature mode, a signature time, and the like, in addition to the first signature identifier and the first signature data, which may be set according to actual needs. In this embodiment, only the first seal image block includes the necessary first signature identifier and first signature data is taken as an example for description, and the description of the case that the first seal image block includes other information is omitted.
On the basis of the electronic seal signing method, the embodiment of the invention provides an electronic seal checking method, the implementation process is shown in fig. 3, and the execution steps comprise:
s31: and receiving an electronic seal-riding seal checking instruction.
An electronic seal-on-perforation seal checking button can be arranged, and when the electronic seal-on-perforation seal checking button is triggered, the electronic seal-on-perforation seal checking button is equivalent to a received electronic seal-on-perforation seal checking instruction.
S32: and acquiring the electronic seal to be verified and the electronic document to be verified.
S33: and acquiring second signature data of the electronic seal to be verified.
The electronic seal to be verified generally comprises a plurality of seal image blocks, and the signature data of each seal image block is the same, so that signature data included in the signature data of any one seal image block in the electronic seal to be verified can be taken as signature data of the electronic seal to be verified, and the signature data is defined as second signature data.
S34: and carrying out Hash operation on the electronic document to be verified to obtain third signature data corresponding to the electronic document to be verified.
The electronic seal to be verified can perform hash operation on the electronic document to be verified when the electronic seal to be verified is signed, so that second signature data of the electronic document to be verified is obtained, and in order to verify whether the electronic seal to be verified is effective or not, the hash operation can be performed on the electronic document to be verified again, so that third signature data corresponding to the electronic document to be verified is obtained.
S35: and determining whether the electronic seal to be verified is valid according to the second signature data and the third signature data.
The second signature data is acquired in S33, the third signature data is acquired in S34, and whether the electronic seal to be verified is valid can be determined according to the second signature data and the third signature data.
S36: and acquiring a second signature of the electronic seal to be verified.
The electronic seal to be verified generally comprises a plurality of seal image blocks, and the signature data of each seal image block is the same, so that the signature mark included in the signature data of any one seal image block in the electronic seal to be verified can be taken as the signature mark of the electronic seal to be verified, and the signature mark is defined as a second signature mark.
S37: and adding a valid identifier in the signature data carrying the second signature identifier.
Because the signature data of each seal image block of the electronic seal on the perforation to be checked has the same signature, whether the signature is effective or not can be added into the signature data carrying the second signature, and therefore whether the electronic seal on the perforation to be checked is effective or not can be rapidly represented.
Specifically, in S35, determining whether the electronic seal to be verified is valid according to the second signature data and the third signature data specifically includes: determining whether the second signature data is the same as the third signature data; if the second signature data is the same as the third signature data, determining that the electronic seal to be verified is valid; and if the second signature data is different from the third signature data, determining that the electronic seal to be verified is invalid. The second signature data is the same as the third signature data, which indicates that the electronic document to be verified is not changed, and the electronic signature to be verified is valid; otherwise, the electronic document to be verified is changed, and the electronic signature to be verified is invalid.
On the basis of the electronic seal signing method, the embodiment of the invention provides an electronic seal checking method, the implementation process is shown in FIG. 4, and the execution steps comprise:
s41: and receiving an electronic seal-perforation deleting instruction.
An electronic seal-on-perforation deleting button can be arranged, and when the electronic seal-on-perforation deleting button is triggered, the electronic seal-on-perforation deleting button is equivalent to an electronic seal-on-perforation deleting instruction.
S42: and acquiring a third signature of the electronic seal to be deleted.
The electronic seal to be deleted usually comprises a plurality of seal image blocks, and the signature data of each seal image block are the same, so that the signature mark included in the signature data of any one seal image block in the electronic seal to be deleted can be taken as the signature mark of the electronic seal to be deleted, and the signature mark is defined as a third signature mark.
S43: and deleting the signature data carrying the third signature and the seal image block of the electronic seal to be deleted.
The electronic seal to be deleted generally comprises a plurality of seal image blocks, and the signature data of each seal image block are the same, so that the signature data carrying the third signature and the seal image block of the electronic seal to be deleted can be deleted, and the whole electronic seal to be deleted can be rapidly deleted.
Based on the same inventive concept, an embodiment of the present invention provides a signature data management apparatus for an electronic seal, the apparatus having a structure as shown in fig. 5, and comprising:
the receiving module 51 is used for receiving an electronic seal signing instruction;
the acquisition module 52 is used for acquiring the electronic document to be signed and the electronic seal;
the signature module 53 is configured to insert a first seal control into a first page of the electronic document to be signed, to obtain a first seal image block where the electronic seal falls on a side seam of the first page, and to determine signature data of the first seal image block according to the electronic document to be signed; and inserting a seal control into each page of the electronic document to be signed except the first page to obtain a second seal image block of the electronic seal falling on the edge seam of each page, and copying the signature data to obtain the signature data of each second signature data block.
According to the scheme, after the signature data of the first seal image block is obtained, the signature data of the second signature image block can be directly copied to the signature data block of the first signature data block, so that the rapid signature of the electronic seal on the perforation is realized.
Specifically, the signature module is specifically configured to:
setting a first signature mark corresponding to the electronic document to be signed;
carrying out Hash operation on the electronic document to be signed to obtain first signature data corresponding to the electronic document to be signed;
and taking the first signature identification and the first signature data as signature data of the first seal image block.
Optionally, the system further comprises a seal verification module, wherein:
the receiving module is also used for receiving an electronic seal-riding seal checking instruction;
the acquisition module is also used for acquiring the electronic seal to be verified and the electronic document to be verified; acquiring second signature data of the electronic seal to be verified;
the seal checking module is used for carrying out Hash operation on the electronic document to be checked to obtain third signature data corresponding to the electronic document to be checked; determining whether the electronic seal to be verified is valid according to the second signature data and the third signature data; acquiring a second signature of the electronic seal to be checked; and adding a valid identifier in the signature data carrying the second signature identifier.
Specifically, the seal checking module is specifically configured to:
determining whether the second signature data is identical to the third signature data;
if the second signature data is the same as the third signature data, determining that the electronic seal to be verified is valid;
and if the second signature data is different from the third signature data, determining that the electronic seal to be verified is invalid.
Optionally, the system further includes a deletion module, wherein:
the receiving module is also used for receiving an electronic seal-riding deleting instruction;
the acquisition module is also used for acquiring a third signature of the electronic seal to be deleted;
and the deleting module is used for deleting the signature data carrying the third signature and the seal image block of the electronic seal to be deleted.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While alternative embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including alternative embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made in the embodiments of the present invention without departing from the spirit or scope of the embodiments of the invention. Thus, if such modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to encompass such modifications and variations.
Claims (8)
1. A signature data management method of an electronic seal, which is characterized by comprising the following steps:
receiving an electronic seal signing instruction;
acquiring an electronic document to be signed and an electronic seal;
inserting a first seal control into a first page of the electronic document to be signed to obtain a first seal image block of the electronic seal falling on a side seam of the first page, and determining signature data of the first seal image block according to the electronic document to be signed; inserting a seal control piece for each page of the electronic document to be signed except for the first page to obtain a second seal image block of the electronic seal falling on the edge seam of each page, and copying the signature data to obtain the signature data of each second seal image block;
the method for determining the signature data of the first seal image block according to the electronic document to be signed specifically comprises the following steps:
setting a first signature mark corresponding to the electronic document to be signed;
carrying out Hash operation on the electronic document to be signed to obtain first signature data corresponding to the electronic document to be signed;
and taking the first signature identification and the first signature data as signature data of the first seal image block.
2. The method of claim 1, further comprising:
receiving an electronic seal checking instruction;
acquiring an electronic seal to be verified and an electronic document of the seal to be verified;
acquiring second signature data of the electronic seal to be verified;
performing hash operation on the electronic document to be checked to obtain third signature data corresponding to the electronic document to be checked;
determining whether the electronic seal to be verified is valid according to the second signature data and the third signature data;
acquiring a second signature of the electronic seal to be verified;
and adding an identifier which is effective or not in the signature data carrying the second signature identifier.
3. The method of claim 2, wherein determining whether the electronic seal to be verified is valid according to the second signature data and the third signature data comprises:
determining whether the second signature data is the same as the third signature data;
if the second signature data is the same as the third signature data, determining that the electronic seal to be verified is valid;
and if the second signature data is different from the third signature data, determining that the electronic seal to be verified is invalid.
4. The method of any of claims 1-3, further comprising:
receiving an electronic seal-perforation deleting instruction;
acquiring a third signature of the electronic seal to be deleted;
and deleting the signature data carrying the third signature and the seal image block of the electronic seal to be deleted.
5. A signature data management device of an electronic seal on a perforation, comprising:
the receiving module is used for receiving an electronic seal signing instruction;
the acquisition module is used for acquiring the electronic document to be signed and the electronic seal;
the signature module is used for inserting a first seal control into a first page of the electronic document to be signed to obtain a first seal image block of the electronic seal falling on a side seam of the first page, and determining signature data of the first seal image block according to the electronic document to be signed; inserting a seal control into each page of the electronic document to be signed except for a first page to obtain a second seal image block of the electronic seal falling on the edge seam of each page, and copying the signature data to obtain signature data of each second seal image block;
wherein, the signature module is specifically configured to:
setting a first signature mark corresponding to the electronic document to be signed;
carrying out Hash operation on the electronic document to be signed to obtain first signature data corresponding to the electronic document to be signed;
and taking the first signature identification and the first signature data as signature data of the first seal image block.
6. The apparatus of claim 5, further comprising a chapter verification module, wherein:
the receiving module is also used for receiving an electronic seal checking instruction;
the acquisition module is also used for acquiring the electronic seal to be checked and the electronic document to be checked; acquiring second signature data of the electronic seal to be verified;
the seal checking module is used for performing hash operation on the electronic document to be checked to obtain third signature data corresponding to the electronic document to be checked; determining whether the electronic seal to be verified is valid according to the second signature data and the third signature data; acquiring a second signature of the electronic seal to be verified; and adding an identifier which is effective or not in the signature data carrying the second signature identifier.
7. The apparatus of claim 6, wherein the signature verification module is specifically configured to:
determining whether the second signature data is the same as the third signature data;
if the second signature data is the same as the third signature data, determining that the electronic seal to be verified is valid;
and if the second signature data is different from the third signature data, determining that the electronic seal to be verified is invalid.
8. The apparatus of any of claims 6-7, further comprising a deletion module, wherein:
the receiving module is also used for receiving an electronic seal-perforation deleting instruction;
the acquisition module is also used for acquiring a third signature of the electronic seal to be deleted;
and the deleting module is used for deleting the signature data carrying the third signature and the seal image block of the electronic seal to be deleted.
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| CN201811209155.0A CN109450637B (en) | 2018-10-17 | 2018-10-17 | Signature data management method and device of electronic perforation seal |
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| CN201811209155.0A CN109450637B (en) | 2018-10-17 | 2018-10-17 | Signature data management method and device of electronic perforation seal |
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| CN110532811B (en) * | 2019-08-30 | 2021-06-18 | 杭州天谷信息科技有限公司 | PDF (Portable document Format) signature method and PDF signature system |
| TWI778361B (en) * | 2020-05-18 | 2022-09-21 | 天逸財金科技服務股份有限公司 | Distributed digital signature processing method and system |
| CN112000974A (en) * | 2020-09-11 | 2020-11-27 | 支付宝(杭州)信息技术有限公司 | Electronic signature method and device for document |
| CN113259113A (en) * | 2021-02-09 | 2021-08-13 | 杭州安存网络科技有限公司 | Rapid perforation signature method suitable for PDF |
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| JP2002236868A (en) * | 2001-02-07 | 2002-08-23 | Shachihata Inc | Electronic seal system and recording medium for recording electronic seal program |
| JP4693285B2 (en) * | 2001-06-19 | 2011-06-01 | シヤチハタ株式会社 | Electronic seal system and recording medium recording electronic seal program |
| CN101311950B (en) * | 2007-05-25 | 2012-01-18 | 北京书生国际信息技术有限公司 | Electronic stamp realization method and device |
| CN103679779A (en) * | 2012-09-25 | 2014-03-26 | 苏州精易会信息技术有限公司 | Realization method for seal on the perforation |
| CN108052807A (en) * | 2017-12-27 | 2018-05-18 | 北京云京科技有限公司 | The method and apparatus for realizing E-seal |
| CN108122097A (en) * | 2017-12-29 | 2018-06-05 | 北京云京科技有限公司 | Support the electronic signature method and system of more application scenarios |
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