CN113688360B - Distributed digital signature processing method and system - Google Patents

Abstract

The invention discloses a decentralized digital signature processing method and system, which allows users to sign digital files with multiple pages through electronic devices, and for each page of the digital file that has been signed, through The present invention can ensure that the signed digital file has not been replaced or changed.

Description

Distributed digital signature processing method and system

Technical field

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 computational load.

Background technique

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

On paper documents, signatures and/or seals are used to confirm the legal effect of the document. Usually, signatures and/or seals are made where the name appears or on the last page. However, in order to ensure continuity between multiple documents, Since the document is unique and cannot be replaced, a seal is stamped between each document to ensure the original signature status of multiple documents.

In digital files, the entire digital file is digitally signed, and the immutability of multiple files is ensured through the encryption of digital signatures; however, encryption of digital files or other operations will increase the computational load. A powerful processor is required for processing, otherwise the calculation time will be shortened or calculation errors will occur. At the same time, digital files need to be digitally signed through a one-time download. If the digital file is accompanied by mixed graphics and text or has high image resolution, it will result in a very large file. For currently commonly used electronic devices, such as mobile phones or tablets, the processor capabilities of which are not as good as those of personal computers, and the storage space of the electronic devices is limited, the traditional digital signature method is defective.

In view of this, the present invention provides a decentralized digital signature processing method and system to provide a way to match buyers and sellers in need.

Contents of the invention

A first object of the present invention is to provide a decentralized digital signature processing method for users to perform signatures on digital files with multiple pages.

The second object of the present invention is to provide signature page verification steps for signature verification based on the above-mentioned distributed digital signature processing method.

The third object of the present invention is to use a hash algorithm to verify the page based on the above-mentioned distributed digital signature processing method, so as to generate a digital signature code embedded in 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 to confirm the correctness and reliability of each page.

The fifth object of the present invention is to provide a decentralized digital signature processing system for users to perform signatures on digital files with multiple pages.

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

In order to achieve the above objects or other objects, the present invention provides a distributed digital signature processing method for users to perform signatures on a digital file with multiple pages. The decentralized digital signature processing method includes step a: receiving the initial file information of the digital file to determine the number of pages of the digital file; step b: downloading one of the pages of the digital file as the page to be signed; 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. Chapter page; step d: record the first digital signature code on the page to be verified; step e: repeat step b according to the number to generate the corresponding signature page on each of these pages and add these first digits to the page. The signature code is recorded on the page to be verified until all these pages form the corresponding signature page; step f: execute the second hash algorithm on the page to be verified to generate a second hash algorithm corresponding to the page to be verified. digital signature code and embed the second digital signature code into the page to be verified to form a verification page; and step g: output the verification page.

Preferably, after step c, perform step h: output the signature page.

Further preferably, before step a or after step g, perform the initial steps of the digital file, including:

i: Execute the first hash algorithm on the pages of the digital file to generate a corresponding third digital signature code on each of the pages;

j: Record the third-digit signature codes of these pages on the verification page; and

k: Execute the second hash algorithm on the check page to generate a fourth digital signature code corresponding to the check page.

More preferably, the decentralized digital signature processing method also includes a signature page verification step:

l: Compare the first digital signature code and the third digital signature code of these pages to generate comparison information of success and failure respectively;

m: Repeat step l according to the number to obtain the comparison information of these pages until these pages are compared;

n: Calculate the ratio of successful comparison to failed comparison to determine the accuracy of the digital file.

More preferably, the decentralized digital signature processing method also includes a verification page verification step:

o: Confirm the accuracy, execute step p when the accuracy is not less than the threshold, execute step r when the accuracy is less than the threshold;

p: Compare the second digital signature code and the fourth digital signature code to generate correct file information and file error information;

q: Send a signature success notification based on the correct information of the file and a signature failure notification based on the wrong information of the file; and

r: End verification.

More preferably, the distributed digital signature processing method also includes a digital file verification step:

s: Compare the second digital signature code and the fourth digital signature code to generate correct file information and file error information;

t: Execute step u according to the correct information of the file and execute step z according to the error information of the file;

u: Compare the first digital signature code and the third digital signature code of these pages to generate comparison information of success and failure respectively;

v: Repeat step u according to the number to obtain the comparison information of these pages until these pages are compared;

w: Calculate the ratio of successful comparison to failed comparison to determine the accuracy of the digital file;

x: When it is judged that the accuracy rate is not less than the threshold, step y is executed; when the accuracy rate is less than the threshold, step z is executed;

y: Send notification of successful signature and end verification; and

z: Send a signature failure notification and end the verification.

More preferably, the distributed digital signature processing method also includes a setting step:

aa: Set the threshold to 100%.

Further preferably, the first hash algorithm and the second hash algorithm are the same algorithm.

In order to achieve the above objects or other objects, the present invention provides a distributed digital signature processing system for users to perform signatures on digital files with multiple pages. The distributed digital signature processing system includes an input unit, a processing unit and an output unit. The input unit receives the signature or seal from the user, and the input unit receives each of the pages of the digital file in sequence. The processing unit is connected to the input unit. The processing unit embeds the signature or seal in each of these pages. The processing unit executes a first hash algorithm to calculate each of the pages to respectively generate a signature page with a first digital signature code. The processing unit creates a verification page to record these 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 to the processing unit to output the signature page and the verification page.

In order to achieve the above objects or other objects, the present invention provides a distributed digital signature processing system for verifying signature pages and verification pages related to digital files. Among them, digital files have multiple 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 the first digital signature code and the verification page with the second digital signature code. The processing unit is connected to the input unit. The processing unit executes a first hash algorithm to calculate each of the pages to generate a third digital signature code respectively. The processing unit creates a check page to record these third digital signature codes and executes a second hash algorithm to generate a corresponding fourth digital signature code on the check page. The output unit is connected to the processing unit to output a signature success notification and a signature failure notification. Wherein, the 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 success notification or the signature Failure notification.

Compared with the existing technology, the present invention provides a distributed digital signature processing method and its system. Through the distributed digital signature processing method and its system of the present invention, it can have the following advantages:

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

(b): The storage space requirement is low and can be downloaded for pages that require signatures.

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

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

Description of drawings

Figure 1 is a schematic flow chart of a distributed digital signature processing method according to the first embodiment of the present invention;

Figure 2 is a schematic flow chart of a distributed digital signature processing method according to the second embodiment of the present invention;

Figure 3 is a block diagram of a distributed digital signature processing system according to the third embodiment of the present invention;

FIG. 4 is a block diagram of a distributed digital signature processing system according to the fourth embodiment of the present invention.

Explanation of reference signs

S11-S17…method steps

S21-S23…method steps

S21…method steps

2…digital files

22…pages

10, 10’…distributed digital signature processing system

12, 12’…input unit

14, 14’…processing unit

16, 16’…output unit

S1…Signature

S2…seal

H1…The first hash algorithm

H2...the 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...check page

SSN... Notification of successful signature

SFN…Signature failure notification.

Detailed ways

In order to fully understand the purpose, characteristics and effects of the present invention, the present invention will be described in detail through the following specific embodiments and in conjunction with the attached drawings, as follows:

In the present invention, one or one is used to describe the units, elements and components described herein. This is done only for convenience of explanation and to provide a general sense of the scope of the invention. Therefore, unless it is obvious otherwise, such description should be understood to include one, at least one, and the singular also includes the plural.

As used herein, the terms include, has, contains or any other similar terms are intended to cover a non-exclusive inclusion. For example, an element, structure, article, or device that contains multiple elements is not limited to those listed herein, but may include elements that are not expressly listed but are 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 to an exclusive or.

Please refer to Figure 1, which is a schematic flow chart of a distributed digital signature processing method according to the first embodiment of the present invention. As shown in Figure 1, the distributed digital signature processing method allows users to perform signatures on a digital document with multiple pages. Users can execute the decentralized digital signature processing method on electronic devices, such as mobile phones, tablets, etc.

The distributed digital signature processing method starts from step a, receiving the initial file information of the digital file to determine the number of pages of the digital file. In this step, the number of these pages can be calculated or confirmed based on the initial file information for subsequent digital tag calculation.

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

Next, 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 Signature page. In this step, the content of the page is calculated through the first hash algorithm, and a separate and unique first digital signature is formed on the signature page. Through the content of the first digital signature, it can be understood that the signature page is Digital signature. It is worth noting that the first hash algorithm calculation can add timestamp, page number, page number, etc. 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 a first digital signature of the signature page with the user's seal or signature. Chapter code. It is worth noting that, in one embodiment, after the signature page is generated, the signature page is output to the sending end that requests the digital signature, such as a platform, authorized unit, server or other electronic device.

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

Then step e, repeat step b according to the number to generate the corresponding signature page on each of these pages and record these first digital signature codes on the page to be verified, until all these pages form the corresponding signature page. This signature page. In this step, the first digital signature code can be embedded in each page to form a corresponding signature page.

Next, in step f, a second hash algorithm is executed 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.

Then step g, output the verification page.

Please refer to Figure 2, which is a schematic flow chart of a distributed digital signature processing method according to the second embodiment of the present invention. In Figure 2, before step a or after step g in the first embodiment, the purpose is to execute the initial steps of the digital file on the digital file provided by the digital file supplier. The processing steps are: :

Step i: execute the first hash algorithm on each of the pages of the digital file to generate a corresponding third digital signature code on each of the pages.

Step j: record the third digital signature code of each of these pages on the verification page.

Step k: Execute the second hash algorithm on the verification page to generate a fourth digital signature code corresponding to the verification page.

After the initial steps of the digital document are 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, starting with step 1, the first digital signature code and the third digital signature code of each of these pages are compared to generate comparison information of success and failure respectively; then steps m, repeatedly perform the above steps according to the number to obtain the comparison information of each of these pages, until all of these pages have completed the comparison; and, then step n, calculate the success of the comparison and the failure of the comparison Ratio to determine the accuracy of the digital file.

Verification steps on the verification page include the following steps:

Step o: Confirm the accuracy rate, and execute step p when the accuracy rate is greater than or equal to the threshold, wherein step p: compare the second digital signature code and the fourth digital signature code to generate correct file information With the file error information and a signature success notification based on the correct information of the file and a signature failure notification based on the file error information, the verification is finally completed; in addition, when executing step o, when the accuracy rate is less than the threshold, execute Step r, where step r: end verification. In the second type of digital document verification step, the initial step s is to compare the second digital signature code and the fourth digital signature code to generate correct file information and file error information; then step t, according to the For correct file information, step u is performed, where step u: compare the first digital signature code and the third digital signature code of each of these pages to generate comparison information of success and failure respectively, and then After the comparison, perform step v: Repeat step u according to the number to obtain the comparison information of each of these pages, until all of these pages have completed the comparison, then step w, further calculate the success of the comparison and The ratio of failed comparisons is used to determine the accuracy of the digital file, and then step x is performed: when it is judged that the accuracy is greater than or equal to the threshold, step y is executed, where step y: a signature success notification is issued, and the verification is finally completed. Or, in step x, when it is judged that the accuracy rate is less than the threshold, step z is executed, where step z: sends a signature failure notification, and finally ends the verification; in addition, in step t, according to the file error information Execute step z to issue 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, that is, step aa.

Please refer to FIG. 3 , which is a block diagram of a distributed digital signature processing system according to a third embodiment of the present invention. As shown in FIG. 3 , the distributed digital signature processing system 10 allows the user to perform signatures on a digital file 2 having multiple 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 seal S2 from the user, and the input unit 12 receives each page 22 of the digital file 2 in sequence.

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

Please refer to FIG. 4 , which is a block diagram of a distributed digital signature processing system according to the fourth embodiment of the present invention. In Figure 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. Among them, the digital file 2 has multiple 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 the first digital signature code FDSC and the verification page RP with the second digital signature code SDSC.

The 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 these 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 output unit 16' is connected to the processing unit 14' to output a signature success notification SSN and a signature failure notification SFN. The aforementioned signature success notification SSN and signature failure notification SFN are made by the processing unit 12' comparing the first digital signature FDSC with the third digital signature code TDSC and comparing the second digital signature code SDSC. Generated with the fourth digital signature code FODSC.

The present invention has been disclosed above with preferred embodiments. Those skilled in the art should understand that these embodiments are only used to illustrate the present invention and should not be interpreted as limiting the scope of the present invention. It should be noted that all equivalent changes and substitutions to this embodiment should be deemed to be covered by the protection scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the claims.

Claims (10)

1. A distributed digital signature processing method that allows users to sign digital files with multiple pages. It is characterized in that the distributed digital signature processing method includes: a: Receive the initial file information of the digital file to determine the number of pages of the digital file; b: One of the pages where the digital file is downloaded is the page to be signed; c: Execute the first hash algorithm on the page to be signed to generate the 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 Chapter page; d: Record the first digital signature code on the page to be verified; e: Repeat steps b to d according to the number to generate corresponding signature pages on these pages, and record these first digital signature codes on the page to be verified until all these pages form corresponding signature pages. The signature page; f: Execute 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 embed the second digital signature code into the page to be verified to form a verification page; and g: Output the verification page. 2. The decentralized digital signature processing method according to claim 1, characterized in that, after step c, perform the steps: h: Output the signature page. 3. The decentralized digital signature processing method according to claim 2, characterized in that, before step a or after step g, the initial steps of the digital file are performed, including: i: Execute the first hash algorithm on the pages of the digital file to generate a corresponding third digital signature code on each of the pages; j: Record the third-digit signature codes of these pages on the verification page; and k: Execute the second hash algorithm on the check page to generate a fourth digital signature code corresponding to the check page. 4. The distributed digital signature processing method according to claim 3, characterized in that the distributed digital signature processing method further includes a signature page verification step: l: Compare the first digital signature code and the third digital signature code of these pages to generate comparison information of success and failure respectively; m: Repeat step l according to the number to obtain the comparison information of these pages until these pages are compared; n: Calculate the ratio of successful comparison to failed comparison to determine the accuracy of the digital file. 5. The distributed digital signature processing method according to claim 4, characterized in that the distributed digital signature processing method further includes a verification page verification step: o: Confirm the accuracy, execute step p when the accuracy is not less than the threshold, execute step r when the accuracy is less than the threshold; p: Compare the second digital signature code and the fourth digital signature code to generate correct file information and file error information; q: Send a signature success notification based on the correct information of the file and a signature failure notification based on the wrong information of the file; and r: End verification. 6. The distributed digital signature processing method according to claim 3, characterized in that the distributed digital signature processing method further includes a digital file verification step: s: Compare the second digital signature code and the fourth digital signature code to generate correct file information and file error information; t: Execute step u according to the correct information of the file and execute step z according to the error information of the file; u: Compare the first digital signature code and the third digital signature code of these pages to generate comparison information of success and failure respectively; v: Repeat step u according to the number to obtain the comparison information of these pages until these pages are compared; w: Calculate the ratio of successful comparison to failed comparison to determine the accuracy of the digital file; x: When it is judged that the accuracy rate is not less than the threshold, step y is executed; when the accuracy rate is less than the threshold, step z is executed; y: Send notification of successful signature and end verification; and z: Send a signature failure notification and end the verification. 7. The distributed digital signature processing method according to claim 5 or 6, characterized in that the distributed digital signature processing method further includes a setting step: aa: Set the threshold to 100%. 8. The decentralized digital signature processing 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 that allows users to sign digital files with multiple pages. It is characterized in that the distributed digital signature processing system includes: The input unit receives the signature or seal from the user, and the input unit receives the pages of the digital file in sequence; The processing unit is connected to the input unit, the processing unit embeds the signature or the seal in these pages, and the processing unit executes a first hash algorithm to calculate these pages to respectively generate signature pages with first digital signature codes. , the processing unit creates a verification page to record these first digital signature codes and executes a second hash algorithm to generate a corresponding second digital signature code on the verification page; and The output unit is connected to the processing unit to output the signature page and the verification page. 10. A decentralized digital signature processing system for verifying signature pages and verification pages related to digital files, where the digital files have multiple pages, characterized in that the decentralized digital signature processing system includes: The input unit receives the signature page with the first digital signature code and the verification page with the second digital signature code; The processing unit is connected to the input unit. The processing unit executes a first hash algorithm to calculate each page to separately generate a third digital signature code. The processing unit creates a check page to record these third digital signature codes and executes The second hash algorithm is calculated to generate the corresponding fourth digital signature code on the verification page; and An output unit is connected to the processing unit to output a signature success notification and a signature failure notification; Wherein, the processing unit compares the first digital signature code with the third digital signature code and compares the second digital signature code with the fourth digital signature code to generate the signature success notification or the Signing failure notification.