TWI778361B - Distributed digital signature processing method and system - Google Patents

Abstract

The present invention discloses a distributed digital signature processing method and system which allows users to execute signatures on digital documents with multiple pages through an electronic device, and for each digital document that has been signed page can be ensured that the signed digital document has not been replaced or changed.

Description

Distributed digital signature processing method and system

The present invention relates to the technical field of digital signatures, and in particular, provides a distributed digital signature processing method and system for performing digital signatures with low calculation load.

Traditionally, in order to determine the legal effect of a document, a signature or stamp is required on the document.

On paper documents, the legal effect of the document is confirmed by signature and/or seal. Usually, the signature and/or seal is performed on the name or the last page. However, in order to ensure the consistency between multiple documents Continuity and non-replacement, a stamp is added between each document to ensure the original signed state of multiple documents.

In a digital file, the entire digital file is digitally signed, and the encryption of the digital signature ensures the immutability of multiple files; however, the encryption of the digital file or other calculations will increase the computational load. , requires a powerful processor to process, otherwise it will cause calculation time or calculation errors, and digital files need to be digitally signed through a one-time download. Due to the high degree of factors, it will result in a very large file. For the purpose The commonly used electronic devices, such as mobile phones or tablet computers, are not as capable of processors as personal computers, and when the storage space of the electronic devices is limited, the traditional digital signature method is lacking.

In view of this, the present invention provides a distributed digital signature processing method and system, so as to provide a matching buyer and seller with needs.

The first objective of the present invention is to provide a distributed digital signature processing method for users to execute signatures on digital documents with multiple pages.

The second object of the present invention is to provide a signature page verification step for verification of signatures according to the above-mentioned distributed digital signature processing method.

The third object of the present invention is to use the hash algorithm to verify the page according to the above-mentioned distributed digital signature processing method, so as to generate a digital signature code on the page to embed the page.

The fourth object of the present invention is to record the digital signature code in each page according to the above-mentioned distributed digital signature processing system, so as to confirm the correctness and reliability of each page.

The fifth object of the present invention is to provide a distributed digital signature processing system for users to execute signatures on digital documents with multiple pages.

The sixth object of the present invention is to provide a distributed digital signature processing system for verifying signature pages and verification pages related to digital documents.

In order to achieve the above object or other objects, the present invention provides a distributed digital signature processing method for users to execute signatures on a digital document with multiple pages. The distributed digital signature processing method includes step (a) receiving the initial document message of the digital document to determine the number of the pages of the digital document; step (b) downloading one of the pages of the digital document to be Signature page; step (c) Execute 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 embed 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 the page to be verified; step (e) repeating step (b) according to the number to generate the corresponding signature page on each of the pages and The first digital signature code is recorded on the page to be verified, until all the pages form the corresponding signature page; step (f) executes a second hash algorithm on the page to be verified to generate a page corresponding to the page to be verified. Verifying the second digital signature code of the page and embedding the second digital signature code into the to-be-verified page to form a verification page; and step (g) outputting the verification page.

To achieve the above object or other objects, the present invention provides a distributed digital signature processing system for users to execute signatures on digital documents with multiple pages. The distributed digital signature processing system includes an electronic device, a second input unit, a second processing unit and a second output unit. Furthermore, the electronic device further includes a first input unit, a first processing unit and a first output unit. The first input unit receives a signature or a seal from the user, and the first input unit sequentially receives each of the pages of the digital document. The first processing unit is connected to the first input unit. The first processing unit embeds a signature or stamp on each of these pages. The first processing unit executes a first hash algorithm to calculate each of the pages to generate a signature page with a first digital signature code, respectively. The first processing unit creates 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 first output unit is connected to the first processing unit to output the signature page and the verification page. The second input unit receives the signature page with the first digital signature code and the verification page with the second digital signature code. The second processing unit is connected to the second input unit. The second processing unit executes the first hash algorithm to calculate each of the pages to separately generate a signature code having a third digit. The second processing unit creates a check page to record the third digital signature codes and executes the second hash calculation Algorithm to generate a corresponding fourth-digit signature code on the check page. The second output unit is connected to the second processing unit to output a signature success notification and a signature failure notification. The second processing unit compares the first digital signature with the third digital signature code and the second digital signature code and the fourth digital signature code to generate a signature success notification or a signature failure notification.

Compared with the prior art, the present invention provides a distributed digital signature processing method and system thereof. With the inventive concept of the present invention, it can have the following advantages:

(a) It can be applied to working environments with low computing power, such as mobile communication devices.

(b) The storage space requirement is low, and the pages that need to be signed can be downloaded.

(c) In addition to digital signatures for pages, stitched digital signatures can also be performed for consecutive pages of multiple pages.

(d) Verify the correctness, irreplaceability and immutability of each page and multiple pages.

S11-S17: Method steps

S21-S23: Method steps

S21: Method steps

2: Digital files

22: Pages

10: Distributed digital signature processing system

11: Electronics

12: The first input unit

12': Second input unit

14: The first processing unit

14': Second processing unit

16: The first processing unit

16': Second output unit

S1: Signature

S2: Stamp

H1: First Hash Algorithm

H2: Second Hash Algorithm

FDSC: First digit signature code

SDSC: Second digital signature code

TDSC: Third digit signature code

FODSC: Fourth digit signature code

SP: Signature Page

RP: Verification page

CP: check page

SSN: Signing success notification

SFN: Signing Failure Notification

FIG. 1 is a schematic flowchart of a distributed digital signature processing method according to a first embodiment of the present invention.

FIG. 2 is a schematic flowchart of a distributed digital signature processing method according to a second embodiment of the present invention.

3 and 4 are partial block diagrams of a distributed digital signature processing system according to a third embodiment of the present invention.

In order to fully understand the purpose, features and effects of the present invention, hereby, the present invention is described in detail by the following specific embodiments and in conjunction with the accompanying drawings, and the description is as follows: In the present disclosure, the use of "a" or "an" is used to describe the elements, elements and components described herein. This is done only for convenience of description and to provide a general sense of the scope of the invention. Thus, unless it is clear that it is meant otherwise, such descriptions should be read to include one, at least one, and the singular also includes the plural.

As used herein, the terms "comprising," "including," "having," "containing," or any other similar term are intended to encompass non-exclusive inclusions. For example, an element, structure, article or device containing a plurality of elements is not limited to those elements listed herein, but may include not explicitly listed but generally inherent to the element, structure, article or device other requirements. Otherwise, unless expressly stated to the contrary, the term "or" refers to an inclusive "or" and not an exclusive "or".

Please refer to FIG. 1 , which is a schematic flowchart of a distributed digital signature processing method according to a first embodiment of the present invention. In FIG. 1 , the distributed digital signature processing method can provide a user to execute a signature on a digital document with multiple pages. The user can execute the distributed digital signature processing method on electronic devices, such as mobile phones, tablets, etc.

The distributed digital signature processing method starts from step S11 and receives the initial document message of the digital document to determine the number of the pages of the digital document. In this step, the number of waiting pages can be calculated or confirmed based on the initial file information for subsequent calculation of digital marking.

Next in step S12, one of the pages in which the digital file is downloaded is the page to be signed. In this step, a single-page download or a multi-page download can be adopted. In one embodiment, in the single-page download mode, the purpose of saving storage space can be effectively achieved.

Then in step S13, a first hash algorithm is performed on the page to be signed, so as to generate a first digital signature code corresponding to the page to be signed, and the first digital signature code is embedded in the page to be signed, and then Form the signature page. In this step, the content of the page is processed by the first hash algorithm. Calculated, and a separate and unique first digital signature is formed on the signature page. With the content of the first digital signature, it can be understood that the signature page is digitally signed. It is worth noting that, in the first hash algorithm calculation, a time stamp, page number, page number, etc. may be added as calculation factors of the hash algorithm. In addition, it is worth noting that the user can add a seal or signature to the page to be signed, and use the first hash algorithm to form the first digit of the signed page with the user's seal or signature, etc. Signature code. It should be noted that, in an embodiment, after the signature page is generated, the signature page is output to the sender requesting the digital signature, such as a platform, an authorized unit, a server or other electronic devices.

Next in step S14, the first digital signature code is recorded on the page to be verified. In this step, the first digital signature code can be recorded in the pages to be verified in sequence, in other words, the page to be verified has one or more lists of first digital signature codes from different pages.

Following step S15, step S12 is repeatedly executed according to the number to generate the corresponding signature page on each of the pages and record the first digital signature codes on the pages to be verified until all the pages are All 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.

Next in step S16, a second hash algorithm is performed on the page to be verified to generate a second digital signature code corresponding to the page to be verified, and the second digital signature code is embedded in the page to be verified to form a verification page . In this embodiment, the second hash algorithm may be the same as or different from the first hash algorithm.

Following step S17, the verification page is output.

Please refer to FIG. 2 , which is a schematic flowchart of a distributed digital signature processing method according to a second embodiment of the present invention. In FIG. 2, before step S11 of the first embodiment or after step S17, the The purpose is, for example, at the supply end of the digital file, to perform the initial step of the digital file for the digital file provided by the digital file, and the processing steps are as follows:

In step S21, the first hash algorithm is executed on the pages of each of the digital files to generate a corresponding third digital signature code on each of the pages.

In step S22, the third digital signature code of each of the pages is recorded on the inspection page.

In step S23, the second hash algorithm is executed on the check page to generate a fourth digital signature code corresponding to the check page.

After the initial step of the digital document is completed, the first type of digital document verification step and the second type of digital document verification step can be performed.

In the first type of digital document verification step, it further includes a signature page verification step and a verification page verification step.

In the signature page verification step, the initial step is to compare the first digit signature code and the third digit signature code of each of the pages to generate comparison success and comparison failure comparison messages respectively; then The step is to repeatedly perform the above-mentioned steps according to the number to obtain the comparison information of each of the pages until all the pages are compared; and, the next step is to calculate the comparison of the successful comparison The ratio of failures to determine the correct rate of the digital file.

In the verification page verification step, the initial step is to confirm the correct rate, and when the correct rate is greater than or equal to the threshold, the step is performed, and the second digital signature code and the fourth digital signature code are compared to generate File correct message and file error message, and send a signature success notification based on the file correct message and a signature failure notification based on the file error message, and finally end the verification; on the contrary, when the correct rate is less than the threshold, execute the steps, the system End verification.

In the second type of digital document verification step, the initial step is to compare the second digital signature code and the fourth digital signature code to generate a document correct message and a document error message; the next step is based on the The file correct message execution step is to compare the first digital signature code and the third digital signature code of each of the pages, so as to generate the comparison information of the comparison success and the comparison failure respectively, and after the comparison, Repeat this step according to the number to obtain the comparison information of each of the pages until all the pages are compared, and then the step is to further calculate the comparison between the comparison success and the comparison failure. Ratio to determine the correct rate of the digital file, when it is judged that the correct rate is greater than or equal to the threshold, a successful notification of the signature is issued, and the verification is finally ended, and when it is judged that the correct rate is less than the threshold, a signature is issued Failure notification, and finally end the verification; on the contrary, according to the error message of the file, execute the steps, send a signature failure notification, and finally end the verification.

It is worth noting that, in the aforementioned first type of document verification step and the aforementioned first type of document verification step, the threshold can be set at 100% or any other value.

Please refer to FIG. 3 and FIG. 4 , which are partial block diagrams of the distributed digital signature processing system according to the third embodiment of the present invention. In FIG. 3, it is a block diagram illustrating the electronic device of the distributed digital signature processing system, and in FIG. 4, it is a second input unit, a second processing unit and a second output of the distributed digital signature processing system. Block diagram of the unit.

In FIG. 3 , the distributed digital signature processing system 10 enables the user to execute the signature on the digital documents 2 of the plurality of pages 22 through the electronic device 11 .

In FIG. 3 , the electronic device 11 of the distributed digital signature processing system 10 includes a first input unit 12 , a first processing unit 14 and a first output unit 16 .

The first input unit 12 receives the signature S1 or the seal S2 from the user, and the first input unit 12 receives each of the pages 22 of the digital document 2 in sequence.

The first processing unit 14 is connected to the first input unit 12 . The first processing unit 14 embeds the signature S1 or the seal S2 in each of the pages 22 . The first processing unit 14 executes a first hash algorithm H1 to calculate each of the pages 22 to generate a signature page SP with the first digital signature code FDSC, respectively. The first processing unit 14 additionally creates a verification page RP to record the first digital signature codes FDSC and executes the second hash algorithm H2 to generate the corresponding second digital signature codes SDSC on the verification page RP.

The first output unit 16 is connected to the first processing unit 14 to output the signature page SP and the verification page RP.

In FIG. 4 , the distributed digital signature processing system 10 can verify the signature page SP and the verification page RP related to the digital file 2 through the second input unit 12 ′, the second processing unit 14 ′ and the second output unit 16 ′ . Among them, the digital file 2 has plural pages 22 .

The second input unit 12' receives the signature page SP with the first digital signature code FDSC and the verification page RP with the second digital signature code SDSC.

The second processing unit 14' is connected to the input unit 12'. The processing unit 14' executes a first hash algorithm H1 to calculate each of the pages 22 to generate a TDSC with a third digital signature code, respectively. The processing unit 14' creates a check page CP to record the third digital signature codes TDSC and executes the second hash algorithm H2 to generate the corresponding fourth digital signature code FODSC on the check page CP.

The second 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 signature success notification SSN and signature failure notification SFN are performed by the processing unit 12' comparing the first digital signature FDSC with the third digital signature code TDSC and the second digital signature code SDSC Generated with the fourth digit signature code FODSC.

The present invention has been disclosed above with preferred embodiments, but those skilled in the art should understand that the embodiments are only used to describe the present invention, and should not be construed as limiting the scope of the present invention. It should be noted that all changes and substitutions equivalent to this embodiment should be considered to be included within the scope of the present invention. Therefore, the protection scope of the present invention should be defined by the scope of the patent application.

S11-S17: Method steps

Claims (9)

A distributed digital signature processing method for users to execute signatures on a digital document with multiple pages, the distributed digital signature processing method comprising: (a) an electronic device receiving an initial document message of the digital document to determine The number of the pages of the digital file; (b) one of the pages of the digital file downloaded by the electronic device is the page to be signed, wherein the electronic device selectively downloads a single page or multiple pages of the pages and not all of the pages; (c) performing 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 the first digital signature code Embed the to-be-signed page to form a signed page; (d) record the first digital signature code on the to-be-verified page; (e) repeat steps (b) to (d) according to the number, so that each The pages generate the corresponding signature page and record the corresponding first digital signature code on the page to be verified, until all the pages form the corresponding signature page; (f) The verification page executes a second hash algorithm to generate a second digital signature code corresponding to the to-be-verified page and embed the second digital signature code into the to-be-verified page to form a verification page; and (g) output the verification page. The distributed digital signature processing method as claimed in claim 1, wherein after step (c), step: (h) outputting the signature page. The distributed digital signature processing method of claim 2, wherein before step (a) or after step (g), the initial step of executing the digital file includes: (i) execute the first hash algorithm on the pages of each of the digital files to generate a corresponding third digital signature code on each of the pages; (j) convert the first hash of each of the pages The three-digit signature code is recorded on the check page; and (k) the second hash algorithm is performed on the check page to generate a fourth digit signature code corresponding to the check page. The distributed digital signature processing method of claim 3 further includes a signature page verification step: (1) Comparing the first digital signature code and the third digital signature code of each of the pages to generate separately The comparison information of the comparison success and the comparison failure; (m) repeatedly executing step (1) according to the number, to obtain the comparison information of each of the pages, until all the pages are compared; (n) calculating the ratio of the comparison failure to the successful comparison to determine the correct rate of the digital file. For example, the distributed digital signature processing method of claim 4 further includes a verification page verification step: (o) confirming the correct rate, and executing step (p) when the correct rate is not less than the threshold, and when the correct rate is less than the threshold When the value is set, perform step (r); (p) compare the second digital signature code with the fourth digital signature code to generate a document correct message and a document error message; (q) issue a signature according to the document correct message and (r) end verification. The distributed digital signature processing method of claim 1 further includes a digital document verification step: (s) comparing the second digital signature code and the fourth digital signature code to generate a document correct message and a document error message ; (t) perform step (u) according to the correct message of the document and step (z) according to the error message of the document; (u) compare the first digital signature code and the third digital signature code of each of the pages to generate comparison success and comparison failure information, respectively; (v) repeatedly execute according to the number Step (u), to obtain the comparison information of each of the pages until all the pages are compared; (w) calculate the ratio of the comparison success to the comparison failure to determine the digital file (x) when judging that the correct rate is not less than the threshold, execute step (y), and when the correct rate is less than the threshold, execute step (z); (y) issue a signature success notification and end verification; and (z) issue a signature failure notification and end verification. For example, the distributed digital signature processing method of claim 5 or 6 further includes a setting step: (aa) setting the threshold value to 100%. The distributed digital signature processing method of claim 1, wherein the first hash algorithm and the second hash algorithm are the same algorithm. A distributed digital signature processing system is used for users to execute signatures on a digital file with plural pages, and verify the signature pages and verification pages related to the digital file, wherein the digital file has plural pages, and the distributed digital file The signature processing system includes: an electronic device, and the electronic device further includes: a first input unit for receiving the signature or seal from the user, and the first input unit sequentially receives each of the digital files the pages; the first processing unit is connected to the first input unit, the first processing unit embeds the signature or the seal in each of the pages, the first processing unit executes the first hash algorithm to calculate each one of these pages to respectively generate a signature page with a first digital signature code, the first processing unit creates a verification a certificate page to record the first digital signature codes and perform a second hash algorithm operation to generate a corresponding second digital signature code on the verification page; and a first output unit, connected to the first processing unit, to Output the signature page and the verification page; the second input unit receives the signature page with the first digital signature code and the verification page with the second digital signature code; the second processing unit is Connected to the second input unit, the second processing unit executes the first hash algorithm to calculate each of the pages to separately generate a third digital signature code, the second processing unit creates a check page to record the first Three-digit signature code and executing the second hash algorithm operation to generate a corresponding fourth-digit signature code on the check page; and a second output unit, connected to the second processing unit, to output a signature success notification and Signature failure notification; wherein the second processing unit compares the first digital signature with the third digital signature code and compares the second digital signature code with the fourth digital signature code to generate the signature Notification of success or notification of failure of this signature.

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