TW201411530A - Electronic confirmation system and method - Google Patents

Abstract

An electronic confirmation system is provided. The system includes an electronic confirmation platform server, a checked computer, a check computer, and a confirmed server. The platform server receives a confirmation request sent from the check computer and digital signatures of a checked client and a check unit, which are respectively sent by the checked computer and the check computer. The platform server verifies validity of the confirmation request based on the digital signatures, and transmits the confirmation request to the confirmed server if the confirmation request satisfies validity. The confirmed server collects evidences according to the confirmation request and sends the evidences back to the platform server with its digital signature. Then, the platform server transmits the evidences to the check computer, and receives a check result from the check computer.

Description

Electronic letter platform and method

The invention relates to an online data transmission and verification system and method, in particular to an electronic credit system and method.

In the course of the audit, the auditing unit will often send a confirmation to the affected unit if it needs to obtain more sufficient evidence to confirm the receivables, accounts payable or creditor-debt relationship, or other circumstances that may involve the increase or decrease of the assets of the unit under investigation. The letter, which is the so-called "letter" method, can be used to assist the checking unit in collecting the information on the creditor's rights and debts of the more complete units. In general, the object of the letter may be the supplier or the seller, or it may be a financial unit or other intermediary.

A letter of reference is an audit term that refers to a type of audit evidence obtained by a verification unit in order to obtain information affecting the financial statements or related disclosure items of the unit under investigation, and directly from third parties' statements about the information and the existing status. process.

The letter of credit is one of the important audit procedures, and the audit evidence obtained by the letter is called the letter of inquiry. The inquiry letter shall be sent directly by the checking unit, and the letter-calling unit shall send the reply letter directly back to the checking unit. This is done to prevent the audited unit from tampering with the inquiry letter and the reply information. The main function of the letter is to obtain a sufficient level of recognition and appropriate audit evidence for the auditing unit to reduce the audit risk of the audit to an acceptable level.

For example, the accounting unit of the unit under investigation (a company) records the units in the letter as of ××××× If a bank has a deposit of 1 million yuan, the checking unit (such as an auditing organization in the society) may send a letter of inquiry to the letter receiving unit to obtain a description of the deposit of the unit under investigation by the letter of reference. The checking unit may check the correctness of the accounting records of the investigated unit from the reply letter of the letter in question.

The traditional correspondence operation is transmitted through the post office through the paper information. It is similar to people sending a registered mail. The post office is responsible for receiving and delivering the documents, checking all documents between the unit, the unit under investigation and the unit under the letter. It is done by post, and the process requires a lot of paper, toner, ink, a lot of manpower and working time.

In view of the above, it is necessary to provide an electronic letter-receiving system and method, which enables the checking unit, the unit under investigation and the letter-to-acquisition unit to perform the letter-writing operation in the auditing business quickly and effectively, and enables the confirmed unit to confirm The source of the inquiry letter and the verification unit can confirm the source of the verification data and ensure the correctness and completeness of the verification information.

The invention provides an electronic credential method, which is applied to an electronic credential platform server, and the electronic credential platform server connects and communicates with the computer of the inspected unit, the computer of the checking unit and the gateway of the letter receiving unit through the network. The gateway of the relevant unit is connected to the server of the certificate. The method comprises: (a) receiving a first verification letter sent by the computer of the checking unit; (b) transmitting the inquiry letter to the computer of the inspected unit; (c) receiving the certificate from the computer of the inspected unit and signing the digital certificate of the inspected unit. a second letter of inquiry generated by a letter of inquiry; (d) transmitting a second letter of inquiry to the computer of the checking unit; (e) receiving a computer return from the checking unit to check the number of certificates issued by the unit. a third confirmation letter generated; (f) transmitting a third confirmation letter to the gateway of the letter receiving unit; (g) receiving a first reply letter from the gateway of the letter receiving unit, the first (3) transmitting the first reply letter to the computer of the checking unit; and (i) receiving the computer of the checking unit by the third letter of inquiry signed by the digital certificate of the letter and the verification data from the server of the letter receiving unit; (h) transmitting the first reply letter to the computer of the checking unit; According to the verification data in the first reply, check the results of the check of the investigated unit.

An electronic credit card system, comprising: a first letter management module, a first transceiver module and a first verification module applied to an electronic mail platform server, wherein the electronic document platform server communicates with the network The computer of the unit under investigation, the computer of the checking unit and the gateway of the letter receiving unit are connected and communicated. The first letter management module is used for the first inquiry letter from the computer of the checking unit, and the first inquiry letter is transmitted to the computer of the inspected unit, and the computer of the inspected unit is returned to be signed by the digital certificate of the inspected unit. The second inquiry letter generated by the first verification letter, and the second inquiry letter is sent to the computer of the checking unit, and the third verification certificate generated by the second verification letter of the digital certificate is signed by the computer of the checking unit. Letter and the first reply letter from the third letter of inquiry and verification data of the digital certificate issued by the letter of the letter from the letter of the letter of the letter to the checking unit, and receiving the computer from the checking unit The result of checking the needle; the first transceiver module is configured to transmit the third verification letter to the gateway of the letter receiving unit, and receive the first reply letter from the gateway of the letter receiving unit; the first inspection mode The group is used to verify the digital signature of the received inspection unit, the digital signature of the unit under investigation and the digital signature of the letter of the certificate, and confirm the source and integrity of the inquiry letter based on the verification result.

Compared with the prior art, the electronic credit card system and method provided by the present invention can be used by the checking unit to obtain the verification data through the electronic credit card platform constructed by the electronic mail platform server; the letter receiving unit can consult the electronic credit card platform. The letter provides verification information to the checking unit, and obtains the number of signatures of the checking unit and the inspected unit, and verifies the digital signature to confirm the source of the inquiry letter and the completeness of the information; the unit under investigation can obtain the letter of acceptance through the electronic letter platform. The unit provides verification information to the checking unit. The parties can perform the letter-issuing operations quickly and efficiently through the electronic letter-to-sign platform.

1‧‧‧Electronic Certificate System

100‧‧‧Electronic Letters Platform Server

101‧‧‧First Letter Management Module

102‧‧‧First transceiver module

103‧‧‧First inspection module

200‧‧‧Inspected unit computer

201‧‧‧First Signature Module

300‧‧‧Check unit computer

301‧‧‧Second editing module

302‧‧‧Second Signature Module

110‧‧‧Received by the unit

111‧‧‧Second letter management module

112‧‧‧Second transceiver module

113‧‧‧Second Signature Module

114‧‧‧First editing module

400‧‧‧Received by the unit server

500‧‧‧Received unit computer

501‧‧‧ third editing module

502‧‧‧The third signature module

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a system architecture diagram of a first preferred embodiment of the electronic document system of the present invention.

2 is a system architecture diagram of a second preferred embodiment of the electronic certificate system of the present invention.

3 is a flow chart of a first preferred embodiment of the electronic document method of the present invention.

4 is a flow chart of a second preferred embodiment of the electronic document method of the present invention.

Figure 5 is a flow chart of a third preferred embodiment of the electronic document method of the present invention.

6 is a flow chart of a fourth preferred embodiment of the electronic document method of the present invention.

Referring to Figure 1, there is shown a system architecture diagram of a first preferred embodiment of the electronic document system 1 of the present invention. The electronic credential system 1 includes an electronic credential platform server 100. The electronic credential platform server 100 connects the inspected unit computer 200, the checking unit computer 300, and the letter receiving unit router 110 through the network. The trusted unit tunnel 110 is connected to the trusted unit server 400.

In this embodiment, the electronic document platform server 100 includes a first certificate management module 101, a first transceiver module 102, and a first verification module 103.

The first letter management module 101 is configured to receive the first verification letter including the at least one verification data request by the verification unit computer 300, and transmit the first verification letter to the computer 200 to be inspected, and receive the computer of the inspection unit. 200 returns the second inquiry letter generated by the first verification letter signed by the digital certificate of the inspected unit.

After the first verification module 103 verifies that the first correspondence management module 101 receives the source and correctness of the digital signature of the inspected unit in the second verification letter, the first correspondence management module 101 sends the second verification certificate again. The letter is transmitted to the checking unit computer 300, and receives the third inquiry letter generated by the checking unit computer 300 to check the second verification letter of the digital certificate.

The first verification module 103 verifies that after the first correspondence management module 101 receives the source and correctness of the digital signature of the checking unit in the third verification letter, the first transceiver module 102 transmits the third verification letter again. To the gateway unit 110 of the letter.

After receiving the third verification letter, the second transceiver module 112 of the documentary unit 110 requests the second signature verification module 111 to verify the third verification certificate. The unit digital signature, check the source digital signature and the correctness, and then transmit the verification data request in the third verification letter to the certificate receiving unit server 400 through the second transceiver module 112, and the second transceiver module 112 receives the verification data from the trusted unit server 400.

The second verification seal module 113 is requested by the second letter verification module 111 to receive the third verification certificate and the verification data by the second letter verification module 111, and the first verification result is generated. The first reply to the electronic document platform server 100 is transmitted by the second transceiver module 112.

Thereafter, the first transceiver module 102 receives the first reply message returned by the message unit tunnel 110, and the first verification module 103 verifies the source and correctness of the digital signature of the letter unit in the first reply. Thereafter, the first reply management module 101 transmits the first reply letter to the checking unit computer 300, and receives and records the check result of the verification data in the first reply letter from the computer of the checking unit.

In the embodiment of the present invention, the trusted unit gateway 110 can be a hardware device for connecting two network devices (for example, the electronic mail platform server 100 in FIG. 1 and the received unit servo). The device 400), such as a bank gateway, can be further integrated with the trusted unit server 400 as a single hardware device. In this embodiment, the gateway unit 110 of the certificate is provided with the following functions: verifying the digital signature of the inspected unit and checking the digital signature of the checking unit, and transmitting the request to the receiving unit server 400 according to the verification information request of the verification letter. The data request, receiving the verification data transmitted by the certificate unit server 400, and generating the digital signature of the letter of the certificate, is transmitted to the electronic certificate platform server 100.

As shown in FIG. 1 , in the present embodiment, the trusted unit gateway 110 may include a second transceiver module 111, a second token management module 112, and a second signature verification module 113. An editing module 114 is configured to provide a page of an editable field in the verification data including the corresponding verification letter, and the editable field can receive the verification data from the trusted unit server 400 to generate a corresponding query. A letter from the verification letter and the verification of the verification information.

In the embodiment of the present invention, the inspected unit computer 200 may include a first signature module 201, and the verification unit computer 300 may include a second signature module 301. The first signature module 201 and the second signature module 301 can be respectively used to generate a digital signature of the inspected unit and a digital signature of the checking unit. Check The unit computer 300 can also include a second editing module 302. The second editing module 302 can receive the user input information of the checking unit, and add, delete and modify the verification data request in the verification letter.

In an embodiment of the present invention, the first verification letter may include at least one verification data request and the checking unit, the information of the inspected unit, and the verification data request in the foregoing verification letter or the inquiry letter may be an extensible markup language (XML) The file format, and the verification information request in the above-mentioned inquiry letter or inquiry letter can be signed by the digital certificate signature to the new verification letter, and the digital signature in the new inquiry letter The source and data integrity of the new inquiry letter can be verified by verifying the digital signature. In the embodiment of the present invention, the digital signature may be generated by the private key of the digital certificate for the verification information or the verification information request in the verification letter, and a digital signature is attached to the verification letter to include the foregoing digital signature. New inquiry letter for the chapter.

Referring to FIG. 2, it is a system architecture diagram of a second preferred embodiment of the electronic certificate system 1 of the present invention. In the second preferred embodiment, the electronic credential system 1 does not include the trusted unit gateway 110 shown in FIG. 1 of the first preferred embodiment, and the electronic credential platform server 100 directly transmits through the network. Connected to the computer 500 that is subject to the letter.

The first letter management module 101 of the electronic certificate platform server 100 can be configured to receive the first verification letter including the at least one verification data request by the checking unit computer 300, and transmit the first verification letter to the computer of the inspected unit. 200. A second inquiry letter generated by the first inquiry letter of the receipt of the digital certificate of the inspected unit by the receiving unit 200.

After the first verification module 103 verifies that the first correspondence management module 101 receives the source and correctness of the digital signature of the inspected unit in the second verification letter, the first correspondence management module 101 sends the second verification certificate again. The letter is transmitted to the checking unit computer 300, and receives the third inquiry letter generated by the checking unit computer 300 to check the second verification letter of the digital certificate.

The first verification module 103 verifies that the first correspondence management module 101 receives the source and correctness of the digital signature of the checking unit in the third verification letter, and then the third verification certificate is executed by the first correspondence management module 101. The letter is transmitted to the computer 500 of the letter of reference.

The documentary unit computer 500 can include a third editing module 501 and a third signature module 502, wherein the third editing module 501 can receive input information from the user of the letter receiving unit, including new information for the third verification letter. The verification data requested by the third verification letter is added, deleted and modified, and the third signature module 502 can sign the third verification letter and the verification data by the digital certificate of the letter of the certificate to generate the first reply letter.

The first letter management module 101 can receive the first reply letter returned by the letter card unit computer 500, and the first check module 103 verifies the source and correctness of the digital signature of the letter in the first reply letter. The first letter management module 101 transmits the first reply letter to the checking unit computer 300, and receives and records the checking result of the verification data in the first reply letter from the computer of the checking unit.

Referring to Figure 3, there is shown a flow chart of a first preferred embodiment of the electronic document method of the present invention. The application environment of the electronic credit method in this embodiment is the electronic credit system 1 shown in FIG. 1.

In step S101, the electronic document platform server 100 receives the first verification letter sent by the checking unit computer 300. The check unit computer 300 may be an office computer of an audit department. The inquiry letter contains information on the inspection unit, at least one request for verification information and information on the unit under investigation. The information of the checking unit may include the name of the checking unit, the unified number, the person in charge, the scope of business, and so on. The information of the unit under investigation may include the name of the unit under investigation (such as a company), the uniform number, the person in charge, the scope of business, and so on. The verification data request includes items that need to be verified, such as deposits, loans, receivables and payables, or creditor-debtor relationships. In this embodiment, the verification letter and the verification data request are files in an Extensible Markup Language (XML) format.

In step S102, the electronic credential platform server 100 transmits the first verification letter to the inspected unit computer 200.

Step S103, the electronic credential platform server 100 receives the second verification letter returned by the inspected unit computer 200, and the second verification letter is generated by the first verification letter signed by the inspected unit digital certificate. In this embodiment, the second verification letter may be an archive in an Extensible Markup Language (XML) format.

Step S104: After verifying the source and correctness of the digital signature of the second verification letter, the electronic confirmation platform server 100 transmits a second verification letter to the checking unit computer 300.

Step S105, the electronic certificate platform server 100 receives the third verification letter returned by the checking unit computer 300, and the third verification letter is generated by checking the second verification certificate of the unit digital certificate signature. In this embodiment, the third verification letter may be an archive in an Extensible Markup Language (XML) format. In another embodiment of the present invention, the electronic credential platform server 100 receives the second verification letter returned by the checking unit computer 300, that is, after checking the source and correctness of the digital signature of the inspected unit, The second verification letter is directly returned to the electronic correspondence platform server 100 without checking the second verification certificate of the digital certificate.

Step S106, after verifying the source and correctness of the digital signature of the third verification card, the electronic confirmation platform server 100 transmits a third verification letter to the gateway unit 110 of the certificate. In another embodiment of the present invention, the electronic credential platform server 100 receives the second verification letter returned by the checking unit computer 300, and directly transmits the second verification letter to the trusted unit gateway 110.

Step S107, after the verification unit third party verification unit checks the digital signature of the third verification letter, and the source and correctness of the digital signature of the inspected unit, the request is received according to the verification information of the third verification letter. The unit server 400 transmits a data request requesting verification of the data. After receiving the relevant verification data according to the data request, the certificate unit server 400 transmits the verification data to the gateway unit 110 of the certificate receiving unit. In another embodiment of the present invention, after being verified by the source and correctness of the digital signature of the unit inspected by the second verification letter, the gateway unit 110 of the certificate is required to receive a response according to the verification information of the second verification letter. The certificate unit server 400 transmits a data request requesting verification of the data.

Step S108, the gateway unit 110 receives the verification data transmitted by the certificate unit server 400, and generates a first reply letter including the verification data and the digital signature of the letter according to the verification data, and transmits the information to the electronic The certificate platform server 100. The gateway unit 110 receives the verification data into the corresponding field of the inquiry letter, and generates a digital signature of the letter of the certificate according to the foregoing content. It is the first reply and sends the first reply to the electronic credential platform server 100. In this embodiment, the first reply can be an archive in an Extensible Markup Language (XML) format.

In step S109, the electronic document platform server 100 receives the first reply sent by the message unit gateway 110.

Step S110, after verifying the source and correctness of the digital signature of the first letter, the electronic mail platform server 100 transmits the first reply letter to the checking unit computer 300. The checking unit computer 300 checks the inspected unit according to the verification data of the first reply, and returns the checking result to the electronic letter platform server 100.

In step S111, the electronic credential platform server 100 receives the check result returned by the checking unit computer 300.

Referring to Figure 4, there is shown a flow chart of a second preferred embodiment of the electronic document method of the present invention. The application environment of the electronic credit method in this embodiment is the electronic credit system 1 shown in FIG. 1.

Step S201, the electronic certificate platform server 100 receives the first verification letter sent by the checking unit computer 300 to check the unit digital certificate signature. In this embodiment, the first verification letter may be an archive in an Extensible Markup Language (XML) format, and includes information of the verification unit, at least one request for verification data, and information of the unit under investigation. In another embodiment of the invention, the first verification letter may not include a digital signature of the verification unit.

Step S202, after verifying the source and correctness of the digital signature of the first verification card, the electronic confirmation platform server 100 transmits the first verification letter to the computer 200 to be inspected. In another embodiment of the present invention, the first verification letter does not include the digital signature of the verification unit, and the electronic confirmation platform server 100 directly transmits the first verification letter to the computer 200 to be inspected.

Step S203, the electronic credential platform server 100 receives the second verification letter transmitted by the inspected unit computer 200, and the second verification letter is generated by the first verification letter signed by the inspected unit voucher. In this embodiment, the second verification letter may be an archive in an Extensible Markup Language (XML) format.

Step S204, after verifying the source and correctness of the digital signature of the second verification letter, the electronic confirmation platform server 100 transmits the second verification letter to the gateway unit 110 of the received certificate.

Step S205, after the gateway unit 110 of the certificate is verified to verify the source and correctness of the digital signature of the second verification letter, the data request is transmitted to the certificate server 400 according to the verification data request of the second verification letter. . After receiving the relevant verification data according to the data request, the certificate unit server 400 transmits the verification data to the gateway unit 110 of the certificate receiving unit.

Step S206, after receiving the verification data transmitted by the certificate unit server 400, the received message device 110 sends the verification data into the corresponding field of the second verification letter, and generates a certificate according to the foregoing content. The unit digital signature is attached to the foregoing second verification letter including the verification data, and becomes the first reply letter, and transmits the first reply letter to the electronic credit platform server 100. In this embodiment, the first reply can be an archive in an Extensible Markup Language (XML) format.

In step S207, the electronic credential platform server 100 receives the first reply message transmitted by the credential unit gateway 110.

Step S208, the electronic document platform server 100 transmits the first reply letter to the checking unit computer 300 after verifying the source and correctness of the digital signature of the first reply letter. The checking unit computer 300 checks the inspected unit according to the verification data of the first reply, and returns the checking result to the electronic letter platform server 100.

In step S209, the electronic credential platform server 100 receives the check result returned by the checking unit computer 300.

Referring to Figure 5, there is shown a flow chart of a third preferred embodiment of the electronic document method of the present invention. The application environment of the electronic credit method in this embodiment is the electronic credit system 1 shown in FIG. 2.

Step S301, the electronic credential platform server 100 receives the first verification letter sent by the checking unit computer 300, including the checking unit information, the at least one verification data request, and the checked unit information. In this embodiment, the verification letter and the verification data request are in the form of an Extensible Markup Language (XML) format. case.

In step S302, the electronic credential platform server 100 transmits the first verification letter to the inspected unit computer 200.

Step S303, the electronic credential platform server 100 receives the second verification letter transmitted by the inspected unit computer 200, and the second verification letter is generated by the first verification letter to generate a digital signature of the inspected unit and attached to the first inquiry. Generated by the letter. In this embodiment, the second verification letter may be an archive in an Extensible Markup Language (XML) format.

Step S304, after verifying the source and correctness of the digital signature of the second verification letter, the electronic confirmation platform server 100 transmits a second verification letter to the checking unit computer 300.

Step S305, the electronic document platform server 100 receives the third verification letter returned by the checking unit computer 300, and the third verification letter is generated by checking the second verification certificate of the unit digital certificate signature. In this embodiment, the second verification letter may be an archive in an Extensible Markup Language (XML) format. In another embodiment of the present invention, the electronic credential platform server 100 receives the second verification letter sent back by the checking unit computer 300, that is, the checking unit computer 300 does not check the second digit of the voucher signature by the checking unit. The second verification letter is directly returned to the electronic credential platform server 100.

Step S306, after verifying the source and correctness of the digital signature of the third verification card, the electronic confirmation platform server 100 transmits a third verification letter to the computer 500 to be authenticated. In another embodiment of the present invention, the electronic credential platform server 100 receives the second verification letter returned by the checking unit computer 300, and directly transmits the second verification letter to the trusted unit computer 500.

After receiving the relevant verification information according to the verification data of the received confirmation letter, the computer 500 of the letter of credit will remit the verification data into the corresponding field of the above-mentioned confirmation letter, and generate a digital number of the letter of reference according to the above-mentioned contents. The chapter is attached to the aforementioned confirmation letter including the verification data, and becomes the first reply letter and transmitted to the electronic credit platform server 100. In this embodiment, the first reply can be an archive in an Extensible Markup Language (XML) format.

In step S307, the electronic credential platform server 100 receives the first reply sent by the credit card unit computer 500.

Step S308, the electronic document platform server 100 transmits the first reply letter to the checking unit computer 300 after verifying the source and correctness of the digital signature of the first reply letter. The checking unit computer 300 checks the inspected unit according to the verification data of the first reply, and returns the checking result to the electronic letter platform server 100.

In step S309, the electronic credential platform server 100 receives the check result returned by the checking unit computer 300.

Referring to Figure 6, there is shown a flow chart of a fourth preferred embodiment of the electronic document method of the present invention. The application environment of the electronic credit method in this embodiment is the electronic credit system 1 shown in FIG. 2.

Step S401, the electronic certificate platform server 100 receives the first verification letter sent by the checking unit computer 300, and the first verification letter is generated by the checking unit for the content of the verification letter, and a digital unit signature is attached to the inquiry letter. , became the first letter of inquiry including the number of signatures of the check unit. In this embodiment, the first verification letter may be an archive in an Extensible Markup Language (XML) format, and includes information of the verification unit, at least one request for verification data, and information of the unit under investigation. In another embodiment of the invention, the first verification letter may not include a digital signature of the verification unit.

Step S402, after verifying the source and correctness of the digital signature of the first verification card, the electronic confirmation platform server 100 transmits the first verification letter to the computer 200 to be inspected. In another embodiment of the present invention, the first verification letter does not include the digital signature of the verification unit, and the electronic confirmation platform server 100 directly transmits the first verification letter to the computer 200 to be inspected.

Step S403, the electronic credential platform server 100 receives the second verification letter transmitted by the inspected unit computer 200, and the second verification letter is generated by the first verification letter signed by the digital certificate of the inspected unit. In this embodiment, the second verification letter may be an archive in an Extensible Markup Language (XML) format.

Step S404, the electronic credential platform server 100 verifies the unit number of the second inquiry letter After the signature source and correctness, the second inquiry letter is transmitted to the computer 500 of the certificate.

After being verified by the source and correctness of the digital signature of the second inquiry letter, the computer 500 of the letter of inquiry will collect the relevant verification data according to the verification data of the second inquiry letter, and the computer 500 will be verified by the letter of reference. The information is remitted into the corresponding field of the second verification letter, and according to the above content, the digital signature of the letter of reference is attached to the second verification letter including the verification data, and becomes the first reply letter and transmitted to the electronic The certificate platform server 100. In this embodiment, the first reply can be an archive in an Extensible Markup Language (XML) format.

In step S405, the electronic document platform server 100 receives the first reply sent by the certificate unit computer 500.

Step S406, after verifying the source and correctness of the digital signature of the first letter, the electronic confirmation platform server 100 transmits the first reply letter to the checking unit computer 300. The checking unit computer 300 checks the inspected unit according to the verification data of the first reply, and returns the checking result to the electronic letter platform server 100.

In step S407, the electronic credential platform server 100 receives the check result of the checkback computer 300 back.

It should be noted that the above embodiments are only for explaining the technical solutions of the present invention and are not intended to be limiting, and the present invention will be described in detail with reference to the preferred embodiments. Modifications or equivalents are made without departing from the spirit and scope of the invention.

1‧‧‧Electronic Certificate System

100‧‧‧Electronic Letters Platform Server

101‧‧‧First Letter Management Module

102‧‧‧First transceiver module

103‧‧‧First inspection module

200‧‧‧Inspected unit computer

201‧‧‧First Signature Module

300‧‧‧Check unit computer

301‧‧‧Second editing module

302‧‧‧Second Signature Module

110‧‧‧Received by the unit

111‧‧‧Second letter management module

112‧‧‧Second transceiver module

113‧‧‧Second Signature Module

114‧‧‧First editing module

400‧‧‧Received by the unit server

Claims (10)

An electronic correspondence method is applied to an electronic mail platform server. The electronic mail platform server connects and communicates with the computer of the inspected unit, the computer of the checking unit and the gateway of the letter receiving unit through the network. The method includes: Receiving a first verification letter sent by the computer of the checking unit, the first verification letter includes information of the checking unit, at least one request for verifying the information and information of the unit under investigation; transmitting the first inquiry letter to the computer of the checked unit; receiving a second verification letter sent by the computer of the inspected unit, the second verification letter includes a digital signature of the unit under investigation for the first verification letter; and transmitting the second verification letter to the gateway of the letter receiving unit Receiving a first reply sent by the gateway of the letter of credit, the first reply letter includes verification data, a digital signature of the received letter unit generated according to the verification data; and transmitting the first reply letter to the checking unit Computer; and receiving the check result of the computer of the checking unit to check the unit under investigation according to the verification data. The electronic credit method as claimed in claim 1, wherein the gateway of the received certificate is connected to a server of the certificate, and the verification letter received by the gateway of the certificate is verified. After the number of the inspected unit is signed, the request for information is transmitted to the server of the letter receiving unit according to the verification information of the inquiry letter, and the verification data returned by the server of the letter receiving unit is received, and the returned data according to the foregoing The content of the verification data is generated by the digital signature of the letter of the unit to become the first reply letter, and the first reply letter is sent to the electronic letter platform platform server. An electronic correspondence method is applied to an electronic credential platform server, and the electronic credential platform server passes through the network and the inspected unit computer, the checking unit computer and the letter receiving unit computer, and the method comprises: receiving the checking unit computer The first verification letter sent, the first verification letter includes the checking unit Information, at least one request for verification data and information of the unit under investigation; transmitting the first verification letter to the computer of the inspected unit; receiving a second verification letter transmitted by the computer of the inspected unit, the second verification letter includes The first verification letter generates the digital signature of the unit under investigation; transmits the second verification letter to the computer of the letter of reference; receives the first reply sent by the computer of the letter of reference, the first reply includes the verification data, A digital signature issued by the certificate unit according to the verification data; transmitting the first reply letter to the computer of the checking unit; and receiving a check result of checking the checked unit according to the verification data by the computer of the checking unit. The electronic credit method of claim 1 or 3, wherein after receiving the second verification letter transmitted by the computer of the inspected unit, the method further comprises the step of: transmitting the second verification letter to the checking a unit computer; and receiving the second verification letter confirmed and returned by the computer of the checking unit. The electronic credit method of claim 1 or 3, wherein after receiving the second verification letter transmitted by the computer of the inspected unit, the method further comprises the step of: transmitting the second verification letter to the checking a unit computer; and receiving the third verification letter confirmed and returned by the computer of the checking unit, the third verification letter includes a digital signature of the checking unit generated for the second verification letter. The electronic credit method as claimed in claim 1 or 3, wherein the first verification letter further comprises a digital signature of the verification unit generated according to at least the request for the verification data. The electronic document method as described in claim 1 or 3, wherein at least one of the first verification letter, the second verification letter or the first reply letter is an Extensible Markup Language (XML) Format file. An electronic correspondence system comprising a first certificate applied to an electronic credit platform server The management module, the first inspection module and the first transceiver module, the electronic mail platform server connects and communicates with the computer of the inspected unit, the computer of the checking unit and the computer of the letter receiving unit through the network, wherein: a letter management module is configured to receive the first inquiry letter transmitted by the computer of the checking unit, and transmit the first verification letter to the computer of the checked unit, and receive the second inquiry letter returned by the computer of the checked unit The second verification letter includes a digital signature of the checked unit generated for the first verification letter; the first transceiver module is configured to transmit the second verification letter to the computer of the letter receiving unit and receive The first reply letter sent back by the computer of the letter of reference, the first reply letter includes a verification data and a digital signature of the received letter unit generated according to the verification data; the first letter management module is further used for transmitting The first reply letter to the computer of the checking unit, and receiving the checking result of the checking unit checking the checked unit according to the verification data; and the first verification module is used for verifying the received second verification letter The number of signed units and the first time The confirmations of the unit by digital signature. The electronic credit card system as claimed in claim 8, wherein the electronic credit card system further comprises a gateway device for receiving the certificate, and the gateway device of the letter receiving unit is connected to the electronic mail platform server and the receiver The document unit computer includes a second transceiver module, a second certificate management module and a second signature verification module, wherein: the second transceiver module is configured to receive the electronic The second verification letter transmitted by the certificate platform server, the second verification letter is transmitted to the computer of the letter receiving unit, and the verification data from the computer of the letter receiving unit is received; the second verification module is The digital signature of the inspected unit for verifying the second verification letter, and generating the digital signature of the received letter unit according to at least the verification data received; the second letter management module is configured to generate the first reply letter, The first reply includes the verification information and the basis The digital certificate is signed by the credit card unit; and the second transceiver module is further configured to transmit the first reply letter to the electronic credit card platform. The electronic credit card system of claim 9, wherein the documentary unit gateway further comprises an editing module, wherein the editing module provides a verification data corresponding to the verification information in the second verification letter. The editable field page is used to provide the user to edit the verification data in the second verification letter.