CN113688360A - Distributed digital signature processing method and system thereof - Google Patents
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Abstract
The invention discloses a distributed digital signature processing method and a system thereof, which can ensure that a user can execute signature on a digital file with a plurality of pages through an electronic device, and each page of the signed digital file can ensure that the signed digital file is not replaced or changed.
Description
Technical Field
The present invention relates to the field of digital signature technology, and more particularly, to a distributed digital signature processing method and system with low computational load.
Background
Traditionally, to determine the legally effective of a document, it is necessary to sign or seal the document.
In order to ensure the continuity and non-replaceability of multiple documents, a seal is applied between each document to ensure the original signature status of the multiple documents.
In the digital file, the whole digital file is digitally signed, and the invariability of a plurality of files is ensured by encrypting the digital signature; however, encryption or other calculations of digital files can increase the load of operations, require powerful processors to process, and otherwise cause calculation time to be degraded or calculation errors. Meanwhile, the digital document needs to be digitally signed by downloading it once, which results in a huge file if the digital document is accompanied by the condition of graphics context or high image resolution. For the electronic devices commonly used at present, such as mobile phones or tablet computers, the processor capability is inferior to that of personal computers, and the conventional digital signature method has drawbacks in the case of limited storage space of the electronic devices.
In view of the above, the present invention provides a distributed digital signature processing method and system thereof, so as to provide a buyer and a seller with demand matching.
Disclosure of Invention
The first objective of the present invention is to provide a distributed digital signature processing method for users to execute signature on a digital document having multiple pages.
The second objective of the present invention is to provide a signature page verification step for signature verification according to the distributed digital signature processing method.
The third objective of the present invention is to verify the page by using a hash algorithm according to the distributed digital signature processing method, so as to generate a digital signature code embedded page on the page.
The fourth objective of the present invention is to record the digital signature code in each page according to the distributed digital signature processing system to confirm the correctness and reliability of each page.
The fifth objective of the present invention is to provide a distributed digital signature processing system for users to execute signature on a digital document having multiple pages.
A sixth object of the present invention is to provide a distributed digital signature processing system for verifying signature pages and verification pages associated with a digital document.
To achieve the above and other objects, the present invention provides a distributed digital signature processing method for a user to perform signature on a digital document having a plurality of pages. The distributed digital signature processing method includes the steps of: receiving initial file information of the digital file to determine the number of the pages of the digital file; step b: downloading one of the pages of the digital document as a page to be signed; step c: executing a first hash algorithm on the page to be signed to generate a first digital signature code corresponding to the page to be signed and embedding the first digital signature code into the page to be signed to form a signature page; step d: recording the first digital signature code on a page to be verified; step e: repeating the step b according to the number to generate the corresponding signature page on each page and record the first digital signature codes on the page to be verified until all the pages form the corresponding signature page; step f: executing a second hash algorithm on the page to be verified to generate a second digital signature code corresponding to the page to be verified and embedding the second digital signature code into the page to be verified to form a verification page; and step g: the verification page is output.
Preferably, after step c, step h is performed: and outputting the signature page.
Further preferably, before step a or after step g, a digital file initialization step is performed, comprising:
i: executing the first hash algorithm on the pages of the digital document to generate a corresponding third digital signature code on each of the pages;
j: recording the third digital signature codes of the pages in an inspection page; and
k: executing the second hash algorithm on the inspection page to generate a fourth digital signature corresponding to the inspection page.
Further preferably, the distributed digital signature processing method further includes a signature page verification step:
l: comparing the first digital signature code and the third digital signature code of the pages so as to respectively generate comparison information of successful comparison and failed comparison;
m: repeatedly executing the step l according to the number to obtain the comparison information of the pages until the pages are compared;
n: calculating the ratio of the successful comparison and the failed comparison to determine the accuracy of the digital file.
Further preferably, the distributed digital signature processing method further includes a verification page verification step:
o: confirming the accuracy, executing the step p when the accuracy is not less than a threshold value, and executing the step r when the accuracy is less than the threshold value;
p: comparing the second digital signature code with the fourth digital signature code to generate file correct information and file error information;
q: sending out a signature success notice according to the file correct information and sending out a signature failure notice according to the file error information; and
r: and finishing the verification.
Further preferably, the distributed digital signature processing method further includes a digital document verification step:
s: comparing the second digital signature code with the fourth digital signature code to generate file correct information and file error information;
t: executing step u according to the file correct information and executing step z according to the file error information;
u: comparing the first digital signature codes and the third digital signature codes of the pages to respectively generate comparison information of comparison success and comparison failure;
v: repeatedly executing the step u according to the number to obtain the comparison information of the pages until the pages are compared;
w: calculating the ratio of the successful comparison and the failed comparison to determine the accuracy of the digital file;
x: executing step y when the accuracy is judged to be not less than the threshold value, and executing step z when the accuracy is less than the threshold value;
y: sending out a signature success notice and finishing verification; and
z: and sending out a signature failure notice and finishing verification.
More preferably, the distributed digital signature processing method further includes the steps of:
aa: the threshold is set at 100%.
Further preferably, the first hash algorithm and the second hash algorithm are the same algorithm.
To achieve the above and other objects, the present invention provides a distributed digital signature processing system for users to execute signature on a digital document having a plurality of pages. The distributed digital signature processing system includes an input unit, a processing unit and an output unit. The input unit receives a signature or a seal from the user, and the input unit receives each page of the digital file in sequence. The processing unit is connected with the input unit. The processing unit embeds the signature or the seal in each of the pages. The processing unit executes a first hash algorithm to calculate each of the pages to generate a signature page having a first digital signature code, respectively. The processing unit establishes a verification page to record the first digital signature codes and executes a second hash algorithm to generate a corresponding second digital signature code on the verification page. The output unit is connected with the processing unit to output the signature page and the verification page.
To achieve the above and other objects, the present invention provides a distributed digital signature processing system for verifying signature pages and verification pages associated with a digital document. Wherein the digital file has a plurality of pages. The distributed digital signature processing system includes an input unit, a processing unit and an output unit. The input unit receives the signature page with a first digital signature code and the verification page with a second digital signature code. The processing unit is connected with the input unit. The processing unit executes a first hash algorithm to calculate each of the pages to generate a third digital signature code. The processing unit establishes an inspection page to record the third digital signature codes and executes a second hash algorithm to generate a corresponding fourth digital signature code on the inspection page. The output unit is connected with the processing unit to output a signature success notice and a signature failure notice. Wherein the processing unit compares the first digital signature with the third digital signature and compares the second digital signature with the fourth digital signature to generate the signature success notification or the signature failure notification.
Compared with the prior art, the distributed digital signature processing method and the system thereof provided by the invention have the following advantages:
(a) the method comprises the following steps Can be applied to a low-calculation-capability working environment, such as a mobile communication device.
(b) The method comprises the following steps The storage space requirement is low, and the page needing the signature can be downloaded.
(c) The method comprises the following steps In addition to digital signature for pages, a stitched digital signature may be applied to successive pages of a plurality of pages.
(d) The method comprises the following steps Verifying correctness, irreplaceability and inflexibility between each page and a plurality of pages.
Drawings
FIG. 1 is a flowchart illustrating a distributed digital signature processing method according to a first embodiment of the present invention;
FIG. 2 is a flowchart illustrating a distributed digital signature processing method according to a second embodiment of the present invention;
FIG. 3 is a block diagram illustrating a distributed digital signature processing system according to a third embodiment of the present invention;
FIG. 4 is a block diagram illustrating a distributed digital signature processing system according to a fourth embodiment of the present invention.
Description of the reference numerals
Method steps S11-S17 …
Method steps S21-S23 …
Method step S21 …
2 … digital file
22 … page
10. 10' … distributed digital signature processing system
12. 12' … input unit
14. 14' … processing unit
16. 16' … output unit
S1 … signature
S2 … seal
H1 … first hash algorithm
H2 … second hash algorithm
FDSC … first digital signature code
SDSC … second digital signature code
TDSC … third digital signature code
FODSC … fourth digital signature code
SP … signature page
RP … verification Page
CP … ping page
SSN … signature success notification
SFN … sign failure notification.
Detailed Description
For a fuller understanding of the objects, features and advantages of the present invention, reference should now be made to the following detailed description taken in conjunction with the accompanying drawings, in which:
in the present invention, one or more of the units, elements and components described herein are described. This is done for convenience of illustration only and to provide a general sense of the scope of the invention. Thus, unless expressly stated otherwise, such description should be read to include one, at least one and the singular also includes the plural.
In this document, the terms include, have, contain, or any other similar terms are intended to cover non-exclusive inclusions. For example, an element, structure, article, or apparatus that comprises a plurality of elements is not limited to only those elements but may include other elements not expressly listed or inherent to such element, structure, article, or apparatus. Unless expressly stated to the contrary, the term "or" is intended to mean an inclusive or, rather than an exclusive or.
Referring to fig. 1, a flow chart of a distributed digital signature processing method according to a first embodiment of the invention is shown. In FIG. 1, the distributed digital signature processing method can provide a user with a digital document having a plurality of pages to execute signature. The user can execute the distributed digital signature processing method on the electronic device, such as mobile phone, tablet, etc.
The distributed digital signature processing method begins at step a, receiving initial document information of the digital document to determine the number of the pages of the digital document. In this step, the number of the pages can be calculated or confirmed by the initial document information for the subsequent calculation of the digital mark.
Then, in step b, one of the pages of the digital document is downloaded as a page to be signed. In this step, a single page download or a multi-page download can be adopted. In one embodiment, the purpose of saving storage space can be effectively achieved in the single page download mode.
And c, executing a first hash algorithm on the page to be signed to generate a first digital signature code corresponding to the page to be signed and embedding the first digital signature code into the page to be signed to form a signature page. In this step, the content of the page is calculated by the first hash algorithm, and an individual and unique first digital signature is formed on the signature page. It should be noted that the first hash algorithm may be added with time stamp, page number, etc. as the calculation factors of the hash algorithm. In addition, it is worth noting that the user can add a seal or a signature to the page to be signed, and form the first digital signature code of the signed page with the seal or the signature of the user through the first hash algorithm. It is noted that, in one embodiment, after the signature page is generated, the signature page is output to a sender requesting a digital signature, such as a platform, authorized entity, server, or other electronic device.
And d, recording the first digital signature code on a page to be verified. In this step, the first digital signature codes may sequentially record the pages to be verified, that is, the pages to be verified have one or more lists of the first digital signature codes from different pages.
And e, repeating the step b according to the number to generate the corresponding signature page on each page and record the first digital signature codes on the page to be verified until all the pages form the corresponding signature page. In this step, a first digital signature code may be embedded in each page to form a corresponding signature page.
And f, executing a second hash algorithm on the page to be verified to generate a second digital signature code corresponding to the page to be verified and embedding the second digital signature code into the page to be verified to form a verification page. In this embodiment, the second hashing algorithm may be the same as or different from the first hashing algorithm.
And g, outputting the verification page.
Referring to fig. 2, a flow chart of a distributed digital signature processing method according to a second embodiment of the invention is shown. In fig. 2, before step a or after step g of the first embodiment, the purpose of the method is to perform a digital file initialization step on the provided digital file at the digital file providing end, and the processing steps are as follows:
step i, executing the first hash algorithm on the pages of each digital document to generate a corresponding third digital signature on each of the pages.
Step j, recording the third digital signature code of each of the pages in the inspection page.
Step k, executing the second hash algorithm to the inspection page to generate a fourth digital signature corresponding to the inspection page.
After the digital document initialization step is completed, a first type of digital document authentication step and a second type of digital document authentication step may then be performed.
In the first type of digital document verification step, it further comprises a signature page verification step and a verification page verification step.
In the signature page verification step, starting step I, comparing the first digital signature code and the third digital signature code of each page to respectively generate comparison information of comparison success and comparison failure; step m, repeatedly executing the steps according to the number to obtain the comparison information of each page until all the pages are compared; and, following step n, calculating the ratio of the successful comparison and the failed comparison to determine the accuracy of the digital file.
In the verification page verification step, the method comprises the following steps:
step o: confirming the accuracy, and executing a step p when the accuracy is greater than or equal to a threshold value, wherein the step p: comparing the second digital signature code with the fourth digital signature code to generate file correct information and file error information, sending a signature success notice according to the file correct information and sending a signature failure notice according to the file error information, and finally finishing the verification; in addition, when the accuracy is smaller than the threshold value in the step o, a step r is executed, wherein the step r: and finishing the verification. In the second type of digital document verification step, initiating step s of comparing the second digital signature code with the fourth digital signature code to generate file correct information and file error information; and step t, executing step u according to the file correct information, wherein the step u: comparing the first digital signature code and the third digital signature code of each page to generate comparison information of comparison success and comparison failure respectively, and executing the step v: repeatedly executing step u according to the number to obtain the comparison information of each page until all the pages are compared, then calculating the ratio of the comparison success to the comparison failure to determine the correctness of the digital file, and then executing step x: and executing a step y when the accuracy is judged to be greater than or equal to the threshold value, wherein the step y: sending a signature success notification, and finally finishing verification, or executing a step z when the correctness is judged to be less than the threshold in the step x, wherein the step z: sending out a signature failure notice, and finally finishing the verification; in addition, in step t, step z is executed according to the file error information, a signature failure notification is sent out, and finally the verification is finished.
It is noted that the threshold value may be set at 100% or any other value, i.e., step aa, in the first type of document authentication step and the first type of document authentication step.
Referring to FIG. 3, a block diagram of a distributed digital signature processing system according to a third embodiment of the present invention is shown. In FIG. 3, the distributed digital signature processing system 10 enables a user to perform a signature on a digital document 2 having a plurality of pages 22.
The distributed digital signature processing system 10 includes an input unit 12, a processing unit 14, and an output unit 16.
The input unit 12 receives the signature S1 or the stamp S2 from the user, and the input unit 12 sequentially receives each page 22 of the digital file 2.
The processing unit 14 is connected to the input unit 12. The processing unit 14 embeds the signature S1 or the stamp S2 on each page 22. The processing unit 14 performs a first hash algorithm H1 to calculate each page 22 to generate a signed page SP having a first digital signature FDSC, respectively. The processing unit 14 additionally creates a verification page RP for recording the first digital signature codes FDSC and performs a second hash algorithm H2 to generate a corresponding second digital signature code SDSC on the verification page RP.
The output unit 16 is connected to the processing unit 14 to output the signature page SP and the verification page RP.
Referring to FIG. 4, a block diagram of a distributed digital signature processing system according to a fourth embodiment of the present invention is shown. In FIG. 4, the distributed digital signature processing system 10' is capable of verifying the signature page SP and the verification page RP associated with the digital document 2. The digital file 2 has a plurality of pages 22.
The distributed digital signature processing system 10 'includes an input unit 12', a processing unit 14 ', and an output unit 16'.
The input unit 12' receives the signature page SP with a first digital signature code FDSC and the verification page RP with a second digital signature code SDSC.
The processing unit 14 'is connected to the input unit 12'. The processing unit 14' performs a first hash algorithm H1 to calculate each of the pages 22 to generate the third digital signature TDSC respectively. The processing unit 14' creates a verification page CP for recording the third digital signatures TDSC and performs a second hash algorithm H2 to generate a corresponding fourth digital signature FODSC on the verification page CP.
The output unit 16 'is connected to the processing unit 14' to output the signature success notification SSN and the signature failure notification SFN. The aforementioned SSN and SFN are generated by the processing unit 12' comparing the first digital signature FDSC with the third digital signature TDSC and comparing the second digital signature SDSC with the fourth digital signature FODSC.
While the invention has been described in terms of preferred embodiments, it will be understood by those skilled in the art that the examples are intended in a descriptive sense only and not for purposes of limitation. It should be noted that equivalent changes and substitutions to those of the embodiments are intended to be included within the scope of the present invention. Therefore, the protection scope of the present invention is subject to the claims.
Claims (10)
1. A distributed digital signature processing method for a user to execute signature on a digital document having a plurality of pages, the distributed digital signature processing method comprising:
a: receiving initial file information of the digital file to determine the number of the pages of the digital file;
b: downloading one of the pages of the digital document as a page to be signed;
c: executing a first hash algorithm on the page to be signed to generate a first digital signature code corresponding to the page to be signed, and embedding the first digital signature code into the page to be signed to form a signature page;
d: recording the first digital signature code on a page to be verified;
e: repeating the step b according to the number to generate corresponding signature pages on the pages, and recording the first digital signature codes on the pages to be verified until all the pages form the corresponding signature pages;
f: executing a second hash algorithm on the page to be verified to generate a second digital signature code corresponding to the page to be verified, and embedding the second digital signature code into the page to be verified to form a verification page; and
g: the verification page is output.
2. The distributed digital signature processing method as claimed in claim 1, wherein after step c, the steps of:
h: and outputting the signature page.
3. The distributed digital signature processing method as claimed in claim 2, wherein before step a or after step g, the digital file initialization step is executed, comprising:
i: executing the first hash algorithm on the pages of the digital document to generate a corresponding third digital signature code on each of the pages;
j: recording the third digital signature codes of the pages in an inspection page; and
k: executing the second hash algorithm on the inspection page to generate a fourth digital signature corresponding to the inspection page.
4. The distributed digital signature processing method as claimed in claim 3, wherein the distributed digital signature processing method further comprises a signature page verification step:
l: comparing the first digital signature code and the third digital signature code of the pages so as to respectively generate comparison information of successful comparison and failed comparison;
m: repeatedly executing the step l according to the number to obtain the comparison information of the pages until the pages are compared;
n: calculating the ratio of the successful comparison and the failed comparison to determine the accuracy of the digital file.
5. The method as claimed in claim 4, wherein the method further comprises the step of verifying the page:
o: confirming the accuracy, executing the step p when the accuracy is not less than a threshold value, and executing the step r when the accuracy is less than the threshold value;
p: comparing the second digital signature code with the fourth digital signature code to generate file correct information and file error information;
q: sending out a signature success notice according to the file correct information and sending out a signature failure notice according to the file error information; and
r: and finishing the verification.
6. The method as claimed in claim 3, wherein the method further comprises the step of verifying the digital document:
s: comparing the second digital signature code with the fourth digital signature code to generate file correct information and file error information;
t: executing step u according to the file correct information and executing step z according to the file error information;
u: comparing the first digital signature codes and the third digital signature codes of the pages to respectively generate comparison information of comparison success and comparison failure;
v: repeatedly executing the step u according to the number to obtain the comparison information of the pages until the pages are compared;
w: calculating the ratio of the successful comparison and the failed comparison to determine the accuracy of the digital file;
x: executing step y when the accuracy is judged to be not less than the threshold value, and executing step z when the accuracy is less than the threshold value;
y: sending out a signature success notice and finishing verification; and
z: and sending out a signature failure notice and finishing verification.
7. The distributed digital signature processing method as claimed in claim 5 or 6, wherein the distributed digital signature processing method further comprises the steps of:
aa: the threshold is set at 100%.
8. The method of claim 1 wherein the first hash algorithm and the second hash algorithm are the same algorithm.
9. A distributed digital signature processing system for a user to perform signature on a digital document having a plurality of pages, the distributed digital signature processing system comprising:
the input unit receives a signature or a seal from the user, and the input unit sequentially receives the pages of the digital file;
the processing unit is connected with the input unit, embeds the signature or the seal into the pages, executes a first hash algorithm to calculate the pages to respectively generate signature pages with first digital signature codes, establishes a verification page to record the first digital signature codes and executes a second hash algorithm to calculate to generate corresponding second digital signature codes on the verification page; and
and the output unit is connected with the processing unit to output the signature page and the verification page.
10. A distributed digital signature processing system for verifying signature pages and verification pages associated with a digital document, wherein the digital document has a plurality of pages, the distributed digital signature processing system comprising:
an input unit for receiving the signature page with a first digital signature code and the verification page with a second digital signature code;
the processing unit is connected with the input unit, executes the first hash algorithm to calculate each page to respectively generate a third digital signature code, establishes an inspection page to record the third digital signature codes and executes the second hash algorithm to calculate to generate a corresponding fourth digital signature code on the inspection page; and
the output unit is connected with the processing unit to output a signature success notice and a signature failure notice;
wherein the processing unit compares the first digital signature with the third digital signature and compares the second digital signature with the fourth digital signature to generate the signature success notification or the signature failure notification.
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| US20230032328A1 (en) * | 2021-07-30 | 2023-02-02 | Bank Of America Corporation | Apparatus and methods for content-based biometric authentication |
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| CN113688360B (en) | 2024-02-09 |
| TWI778361B (en) | 2022-09-21 |
| TW202145752A (en) | 2021-12-01 |
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