KR20030059565A - Electronic mail display method on a terminal screen for prevention of infection from computer virus by code modulation and macro analysis - Google Patents

Abstract

PURPOSE: A method for expressing an e-mail preventing a code modification typed computer virus is provided to fundamentally prevent the operation of an e-mail computer virus regardless of a sort and a characteristic of the e-mail computer virus, and to previously prevent the infection of the e-mail computer virus. CONSTITUTION: After a code modification-macro analysis viewer generates a temporary header for the selected e-mail, the codes comprising the mail contents is modified and reconfigured by the codes not acted by the computer virus after dividing into an original header, a document part, and the macros(110). The viewer makes the temporary header used as the header by placing the temporary header to a position of the original header(120). The viewer checks that the original header includes the codes over a constant volume more than the temporary header by comparing the original and the temporary header(130). If the original header includes the codes over a constant volume, the viewer displays the contents of the temporary header, replaces the modified codes of the document part with the expression code not acted by the computer virus, and displays it(140).

Description

Electronic mail display method on a terminal screen for prevention of infection from computer virus by code modulation and macro analysis}

The present invention belongs to the technical field related to a method for processing and expressing received e-mails, while preliminarily preventing the e-mail browsing terminal from being infected with an e-mail computer virus without using a computer virus vaccine.

In the technical field related to the prevention method of an email computer virus, the conventional technique is that after the emergence of a specific email computer virus, it is analyzed and developed a vaccine, and then estimated to be infected with the virus using the developed virus vaccine. Scans and repairs e-mails and opens them or prevents them from opening and deleting e-mails suspected to be infected with the virus. The computer virus can be prevented only after it is developed, and it is not possible to prevent the infection of an email computer virus until a vaccine is developed.

Regardless of the type and characteristics of the email computer virus as in the present invention, and a technology for fundamentally preventing the infection of the email computer virus by installing the software without updating or updating the virus vaccine at any time. Is not yet implemented.

In the present invention, by artificially modulating the codes constituting the contents of the e-mail to make all computer viruses contained in the e-mail in an inoperable state and then opening them, the type and characteristics of the e-mail computer virus and Regardless of the origin, the operation of the email computer virus is fundamentally prevented and the infection of the email computer virus is fundamentally prevented in advance.

In addition, the present invention provides a technique for enabling an e-mail recipient to view the contents of an e-mail while preventing an e-mail computer virus infection, regardless of whether the computer virus is infected, and the macro (s) included in the document portion of the e-mail. ) And the ability to express the expected operation results on the e-mail browsing terminal, and the technology that allows the e-mail recipient to directly check the contents of the e-mail and then determine whether it is infected with a computer virus. In order to prevent infection of e-mail computer virus in advance by implementing a technology.

The present invention is a solution to the above problems, and is received at the mail viewing terminal without any processing (or action) causing a result of executing the computer virus included in the email (s). Selecting the codes that make up the header of the e-mail that were sent to form a temporary header that does not contain a computer virus, and then substituting the temporary header for the original header for all subsequent steps until you verify that the email does not contain a computer virus. The code that constitutes the e-mail is divided into original headers (original headers), document parts of the body or attachment (s), and macro (s), and then modified into codes that do not act as computer viruses. The following table is displayed on the display screen of the e-mail browsing terminal by substituting the expression codes that do not act as computer viruses. Generate a macro expression code packet (s) for expressing each function of the macro (s) in the mail reading terminal and express the viewable on the screen, and whether the original header and the macro contain a computer virus If the computer virus is included and the computer virus is included, the corresponding part is set as the virus inclusion estimation part.If the email recipient reads the contents displayed on the screen, and if it is assumed that the computer virus is included, related information is provided. Send a request to delete a virus and send a request to delete the e-mail to a mail-receiving website. If it is confirmed that it does not contain a computer virus, send a request to set up a normal status for the e-mail to a mail-receiving website. We want to implement the technology.

Specifically, a technique related to selecting codes constituting the header of an e-mail received at the mail reader and configuring a temporary header without a virus to use in place of the original header, and codes constituting the e-mail Techniques related to altering headers (original headers), document parts of the body or attachment (s), macro (s) into codes that do not act as computer viruses, and acting as computer viruses Techniques related to rendering on the display screen by substituting non-expression codes, and macro expression code packet (s) for analyzing macro (s) and expressing their respective functions to be accessible to mail readers. A description of each macro (s) using the macro representation code packet (s) and descriptions related to generating Or (b) a technique relating to the presentation of expected results on the display screen, a technique relating to the examination of whether the original headers and macros contain computer viruses, and an email recipient viewing the content presented on the screen, If it is assumed that a computer virus is included, the relevant information is sent to the virus notification website, and a request for deletion of the e-mail is sent to the mail receiving website. A technique related to sending a steady state setting request for an e-mail to a website is implemented.

1 is a conceptual diagram showing the operating principle of the present invention,

FIG. 2 is a flowchart showing exemplary implementation processes and operation steps for processing and expressing an e-mail received at a mail reading terminal using the operation principle of the present invention.

3 is a flowchart following FIG. 2,

4 is a flowchart following FIG. 3.

The present invention consists of an implementation method using the code modulation-macroanalysis viewer of the mail reading terminal operating according to the operation principle of FIG. 1 as a representative operation step as shown in the flowcharts of FIGS. 2, 3 and 4.

First, the terms and symbols used in the present invention are summarized as follows.

'/' Is a symbol of the present invention that includes both 'and' and 'or'.

'E-mail' is a term of the present invention that includes both an e-mail opened in a mail viewing terminal and a web mail opened in an e-mail receiving website.

'Header' is a term of the invention meaning a header as a component of an email.

'Original header' is a term of the present invention that refers to an original header in an unmodulated state included in a received email.

'Temporary header' is a term of the present invention that refers to a header reconfigured in the mail receiving website by selecting the header configuration element code in the original header.

'Original header addition code (s)' is a term of the present invention that refers to the remaining code (s) except for the codes constituting the temporary header from the codes constituting the original header.

"Body" is a term of the present invention that means the body of an email.

'Attachment' is a term of the present invention that means an attachment of an email.

'Document part' is a term of the present invention that means any part of the text or attached file except macros. (The e-mail computer virus included in the text or attached file is included in the document part.)

'Macro' is a term of the present invention that means a macro included in a text or an attached file.

"E-mail computer virus (or computer virus or virus)" is a term of the present invention that refers to a computer virus that is transmitted (or transmitted) via email.

'Virus containing estimation part' is a term of the present invention that means a part which is assumed to contain a virus.

'Code' is a term of the invention meaning original codes that make up the content of a received email. It includes all of the original code that makes up the header, body and document parts of attachments, macros, and so on.

'Code modulation' is a term of the present invention that means artificially modulating the original codes using a specific modulation logic.

'Modulated code' is a term of the present invention that means a code modulated by the code modulation.

'Expression code' is a term of the present invention that means a code to express the contents of the email and related information data in the mail reading terminal.

"Expression" is a term of the present invention collectively including letters, numbers, symbols, computer graphics, symbolic representations, computer animations, scanning images, digital photographic images, moving images, and the like.

The expression code packet is a term of the present invention that means a combination of expression codes arranged in the order of expression.

'Code modulation table' is a term of the present invention that means a table in which modulation codes and expression codes are set so that one representation code corresponds one-to-one to one modulation code.

'Arrangement order table' is a term of the present invention that refers to a table indicating an order of modulation codes used for reconstruction of email contents.

'Modulation Logic' is a term of the invention meaning the logic used to modulate the code.

'Macro code assembly' is a term of the present invention that refers to a code assembly in which the codes constituting the macro are classified and combined according to code types including an operation code, an auxiliary code, and a variable code.

'Operation code' is a term of the present invention that means an instruction code that serves to instruct a function to actually perform a function to be performed when the macro is operated. For example, if the function of the macro is 'to express the number 12345 on the display screen of the mail reading terminal', the command code corresponding to 'express' corresponds to the operation code.

'Auxiliary code' is a term of the present invention that refers to the macro configuration codes that serve to assist the operation code to perform the function of the macro.

'Variable code' is a term of the present invention that refers to the macro itself or codes indicating variable values required for the operation code or auxiliary code. For example, if the function of the macro is 'to express the number 12345 on the display screen of the mail reading terminal', the code corresponding to the number '12345' corresponds to the variable code.

'Reference code assembly' is a term of the present invention that refers to a macro code combination as a reference.

The letter-oriented description form is a term of the present invention that means a form mainly described using words, letters, and combinations thereof.

'Graphic-oriented description form' is a term of the present invention that means a form that is mainly described using a picture or symbolic expression or animation using a computer graphic or a digital photographic image or a video.

'Function description expression code' is a term of the present invention that means a representation code for expressing a function when a macro included in a document portion is applied to and operated on a document portion on a display screen of a mail reading terminal.

'Operation Result Expression Code' is an expression code for expressing the expected operation result when the macro included in the document part is applied to the document part so that the expected operation result can be visually recognized on the display screen of the mail reading terminal. It is a term of invention.

'Code Modulation-Macro Analysis Viewer' is included in a computer program constituting a mail reading terminal, and operates as a function for performing code modulation, macro analysis and its related functions according to the principles of the present invention. It is a term of the present invention that refers to one execution software that is installed and operated independently and that performs the code modulation, macro analysis, and subsidiary functions thereof.

"Communication network" is a generic term including all wired Internet or wireless Internet, local area network (LAN) or group internal communication network (Intranet), wired telephone communication network or wireless telephone communication network or mobile telephone communication network, or other communication networks. Term.

A mail receiving website (or mail receiving web) is a function that delivers an e-mail to a mail reading terminal connected to it without executing and opening the e-mail, or receives and opens an e-mail. It is a term of the present invention that means a server operating website having a function of transmitting contents to a mail browsing terminal connected to the user, and includes software having the above functions operating on a personal computer.

The term 'mail reading terminal' is a term of the present invention that means a terminal used by an email receiver (or a mail receiver) to read the contents of an email.

A terminal is a computer, personal portable terminal, mobile communication device, digital convergence (combined electronic device), which is connected and connected to a mail receiving website using a communication network, and which can use the mail receiving website. And other electronic devices.

Exemplary embodiments of the present invention will be described with reference to the flowcharts of FIGS. 2, 3 and 4 with reference to the operating principle of FIG.

In the first stage of operation, the Code Modification-Macro Analysis Viewer, which prevents the infection of an email computer virus by means of code modulation and macro analysis, is in operation and is in the beginning of reception or completion of reception through the network. Proceed to the step (100) of building the mail reading terminal in the state of holding.

In step 100, the code modulation-macroanalysis viewer configures the contents of the e-mail to be viewed without performing any processing (or action) that results in executing the computer virus included in the e-mail. Altering and reconstructing the code, either individually or in combination with one another, that does not act as a computer virus, and inherent in all handling of the e-mail opening until the e-mail does not contain a computer virus. By using the modulation codes instead of the code of the includes the operation principle to prevent the infection of the computer virus by preventing the operation even if the computer virus contained in the original code.

In step 100, the code modulation-macroanalysis viewer configures the header of the e-mail to be viewed without performing any processing (or action) causing a result of executing the computer virus included in the e-mail. Among the codes that are used, only the basic element codes for the unique function of the header are selected to form a temporary header without a computer virus, and until the email is confirmed that it does not contain a computer virus, By including the temporary header in place of the original header in all of the handling procedures associated with the opening of the, it includes a working principle that prevents the infection even if the original header contains a computer virus.

In step 100, the code modulation-macroanalysis viewer, when an email receiver performs an email opening, assigns the modulation codes constituting the original header or document portion of the email to its respective modulation logic. On the basis of this, the operation principle is expressed on the display screen of the mail reading terminal by substituting the expression codes that do not act as computer viruses.

In step 100, the code modulation-macroanalysis viewer expresses the functions of each of the macro (s) included in the document portion of the e-mail in a text-oriented description form, or when each of the macro (s) is activated. It generates the macro expression code packet (s) for expressing the expected operation result in the form of graphic-oriented explanation, and includes the operation principle that is displayed on the display screen of the mail reading terminal when the e-mail receiver performs the e-mail opening. do.

In the step 100, the code modulation-macroanalysis viewer is configured to identify abnormal parts (meanings) in the document part expressions while the email receiver reads the contents of the email to be viewed on the display screen of the mail reading terminal. Number of characters and combinations thereof, or parts including one or two or more of those parts which are determined to have abnormally changed the original document content), or macro expressions using macro expression code packet (s). If it is determined that macro expressions not related to the document part or macro expression code packet (s) do not apply to the document part, the computer to include the computer virus is included in the e-mail to be read. Include the principle of operation.

In the step 100, if the macro (s) is not included in the email, the operation related to the macro (s) in the operation principle of the code modulation-macroanalysis viewer can be omitted.

In the step 100, one method of constructing the code modulation-macroanalysis viewer to be in operation is to construct a mail reading terminal having the code modulation-macro analysis viewer first and then the code modulation-macro analysis viewer. And operating the mail reading terminal to receive the email (s).

In the step 100, one method of constructing the code modulation-macroanalysis viewer to be in operation is to first establish an e-mail reading terminal having the code modulation-macroanalysis viewer to receive the e-mail (s). Next, the method may be configured to perform an e-mail opening while the code modulation-macro analysis viewer is operated.

In the step 100, one method of holding the received e-mail (s) in the reception start phase or the reception is completed is to receive the e-mail (s) to be transmitted while first establishing and operating the mail browsing terminal. It includes how to hold.

In the next step of operation, the code modulation-macroanalysis viewer operating in step 100 generates a temporary header for the e-mail to be selected from among the e-mail (s) of step 100 and generates a temporary header. The code constituting the content is divided into an original header, a document part, and macro (s), respectively, and then modulated and reconstructed into codes that do not act as computer viruses.

In step 110, the temporary header is configured to select and recombine the basic element codes necessary for the header so that the computer virus is not included.

In step 110, the generation of the temporary header and the code modification are performed without any processing (or action) causing the result of executing the computer virus included in the e-mail.

In the step 110, the method of modulating the codes that do not act as a computer virus, the modulation sequence is arranged in a sequence table or a form of having one representation code corresponding to one to one modulation code Modulating in a manner that modifies one or two or more of the value (or size) or arrangement order of the codes, using a particular modulation logic that generates one or more of the code modulation tables.

One method of implementing the step 110 includes a method of first generating a temporary header using original codes in a state where code modulation is not implemented, and then performing code modulation.

One method of implementing the step 110 is to perform a code modulation first, and then in order to generate a temporary header by restoring the modulated codes selected from among the modulation codes of the original header to the original code state. Include.

In the step 110, the step of performing the code modulation for the macro (s), it is possible to operate the invention even if omitted if not necessary.

In the next operation step, the code modulation-macroanalysis viewer is configured to use the temporary header generated in step 110 in place of the original header in the header position of the e-mail to be viewed in step 110 so as to be used as a header. Proceed to step 120.

In the next operating step, the code modulation-macroanalysis viewer compares the codes of the original header and the temporary header of step 110, so that the original header further includes a certain amount of code (s) more than the temporary header. Proceeding to step 130 of checking whether or not.

As a result of the checking of the step 130, if the original header further includes a certain amount of code (s) more than the temporary header, the following step (s) are proceeded from the following step 140, and Otherwise, the code modulation-macroanalysis viewer proceeds to step 131 of controlling the time-series operation order to proceed from step 150 to subsequent step (s).

In the next operation, the code modulation-macroanalysis viewer that performs the step 131 expresses the contents of the temporary header on the display screen of the mail reading terminal, and the original header addition code included in the original header in the step 130. (S) and replacing the modulation codes of the document portion generated in the step 110 with expression codes that do not act as computer viruses based on their respective modulation logics, and then expressing them on the screen (140). Proceed.

In the next operation step, the code modulation-macroanalysis viewer performing the step 140 is performed by the email receiver while viewing the expressions displayed on the display screen of the mail reading terminal in the step 140. Setting the original header addition code (s) included in the original header at 130 as the virus inclusion estimating part, and then controlling the time-series operation sequence to proceed from the following step 160 to the subsequent step (s) ( Proceed to 141).

In the next operation step, the code modulation-macroanalysis viewer that performs the step 131 expresses the contents of the temporary header on the display screen of the mail reading terminal, and modulates the code of the document portion generated in the step 110. Based on each of the modulation logics, an expression code that does not act as a computer virus is replaced, and then the step 150 of displaying on the screen is performed.

In the step 140 or 150, one method of replacing the modulation codes with the expression codes corresponds to each of the modulation codes using the code modulation table generated in the code modulation of step 110. Finding the representation code, and using the array order table to determine the arrangement order of each of the representation codes.

In the next operation step, the e-mail receiver proceeds to step 151 of viewing the contents expressed on the display screen of the mail reading terminal in step 150.

In the next operation step, the code modulation-macroanalysis viewer classifies each component (s) of the modulation code state generated in step 110 by comparing the constituent modulation codes with the code classification criteria table prepared in advance and classifies them by code type. After generating the macro code assembly, the process of comparing the reference code assembly database prepared in advance to identify the function of the macro proceeds to step 160.

In the step 160, one method of preparing a code classification reference table is a method of preparing a database type code classification reference table by classifying codes constituting macros applicable to various document writers into operation codes, auxiliary codes, and variable codes. It includes.

In the step 160, one method of classifying by code type includes a method of classifying into an operation code, an auxiliary code, and a variable code.

In the step 160, one method of generating a macro code combination includes an auxiliary code (s) for assisting the operation code with respect to one operation code and for the operation code or the auxiliary code (s). The method includes generating a code set by considering the variable code (s) in relation to each other and the original arrangement order.

In the step 160, one method of preparing a reference code assembly database is based on an auxiliary code (s) and an assistance code or the assistance code (s) centering on one operation code and supporting the operation code. Generate code combinations that combine the variable code (s) of the variable code (s) to have one macro function in consideration of each other's connection relationship and arrangement order, in all possible forms using codes classified in the code classification criteria table. And a method of preparing a database in which unique code numbers are distinguished from each other.

In the step 160, one method of identifying a macro function by comparing with a reference code assembly database is to compare and search the generated macro code assembly with a prepared reference code assembly database, and to prepare a macro code assembly suitable for the generated macro code assembly. This method involves identifying the function of a macro in the form of finding a unique number.

In the next operation step, the code modulation-macroanalysis viewer uses the function description expression codes for expressing the function of the macro in the form of character-oriented description, or the graphic operation description for the expected operation result when the macro is operated. The operation result expression codes are found in a database prepared in advance, and the macro expression code packet (s) are generated by sorting them in the order in which they are to be expressed, and then stored and stored (170).

In the step 170, one method of preparing the function description expression codes or the operation result expression codes in the database gives the function description expression codes or the operation result expression codes to the reference code combination of the step 160. It includes a method of preparing in the form of a database attached to the unique macrocode combination unique number.

In the next operation step, the code modulation-macro analysis viewer proceeds to step 180 of expressing the macro expression code packet (s) generated in step 170 on the display screen of the mail reading terminal.

In the step 180, one method of expressing the macro representation code packet (s) on the screen, the operation result representation codes constituting the macro representation code packet, the screen in the step 140 or step 150 And a method of expressing the document part content expressions to be recognized distinctly from the document part content expressions.

In the step 180, one method of expressing the macro-expression code packet (s) on the screen, the operation result representation codes constituting the macro-expression code packet, the screen in the step 140 or step 150 Includes a method of expressing the macros to be expressed in the time-series operation order in which the macros are applied among the document part content expressions expressed in.

In the step 180, in the case where the macro is not related to the document part or does not apply to an area inside the document part, one method of expressing the macro expression code packet (s) on the screen constitutes a macro expression code packet. And a method of expressing the operation result expression codes to the external area of the document part content representations expressed on the screen in the step 140 or 150.

In the step 180, in the case where the macro is not related to the document part or does not apply to an area inside the document part, one method of expressing the macro expression code packet (s) on the screen constitutes a macro expression code packet. Includes a method of expressing the operation result expression codes to be represented in the time-series operation order in which the macro is operated.

In the next step of operation, the e-mail receiver has a function description for each of the contents expressed on the display screen in step 140 or 150, or each of the macro (s) represented on the screen in step 180, or Proceeding to step 181 of viewing the expected operation result.

In the next operating step, the code modulation-macroanalysis viewer is applied whether or not each of the macro code assembly (s) generated in step 160 is related to the document part of the step 110 or is applied inside the document part. In step 190 it is determined whether or not.

In the step 190, one method of determining whether or not related to the document portion is, a method of determining whether the macro code assembly to be determined is a macro code combination usable in the document writer used to create the document portion. Include.

In the step 190, one method of determining whether or not related to the document portion includes a method of determining whether the macro code assembly to be determined is a macro code assembly related to the contents of the document portion.

In the step 190, one method of determining whether or not applied to the inside of the document portion is, when the macro code combination to be determined is displayed on the display screen of the mail reading terminal, the contents of the document portion content representations to be expressed on the screen. Includes a method for determining whether or not a macro code combination that operates to be represented inside the presentation area.

In the next operation step, if it is determined that the step 190 is not related to the document portion or does not apply to the document portion, the code modulation-macro analysis viewer may include a virus-containing estimation portion of the macro to which the macro code combination belongs. Proceed to step 191 to set to.

In the next operation step, a code modification-macroanalysis viewer displays a message on a mail-viewing terminal, so that an e-mail recipient can command a virus report request, an e-mail deletion request, or an e-mail steady state setting request, or otherwise. Proceed to step 200 to provide on the screen.

In the step 200, one form of the means provided on the screen is an item display button that can be clicked (or displayed) or entered on the display screen of the mail reading terminal using a mouse (or an electronic pen) or a keyboard. It is a form to include.

In the next step of operation, the email recipient, via or after completion of the viewing of step 181, uses the means provided on the screen in step 200 to request a virus report and an email deletion request or an electronic message. In step 210, the mail normal state setting request is ordered or otherwise.

In the next operation step, if a virus report request is commanded in step 210, the following step (221) proceeds from the following step (s), and code modification in the step 141 or step 191 If there is a part set as the virus inclusion estimation part by the macro analysis viewer, the following step (s) are proceeded from the following step 230, otherwise the following steps 240 to the following steps are performed. In order to proceed with the (s), the code modulation-macroanalysis viewer proceeds to step 220 of controlling the time-series operation order.

In the next operation step, the step of code modulation-macroanalysis viewer that has performed step 220 provides a means for allowing an e-mail recipient to set a virus inclusion estimation portion on the display screen of the mail reading terminal (221). Proceed.

In the step 221, one form of means to be set is to enable the virus-containing terminal to be displayed on the display screen of the mail reading terminal using a mouse (or an electronic pen) or a keyboard so as to be identified. It is a form including a means.

In the next operational step, the email recipient proceeds to step 222 of setting up the virus inclusion estimate using the means provided in step 221.

In the next operation step, the code modulation-macroanalysis viewer that has performed the step 220 has a temporary header as a header, and the mail reading terminal until the step 222 with respect to the e-mail to be read in the step 110. After transmitting all the information material provided in the website for receiving a virus report, and then proceeds to step 230 to control the time-series operation sequence to proceed from step 250 to the following step (s).

In the step 210, if the e-mail deletion request is ordered, the code modulation-macroanalysis viewer requests the e-mail receiving website to delete the received e-mail, and if the e-mail normal state setting request is commanded, The modulation-macroanalysis viewer requests the mail-receiving website to set up the viewable steady state of the corresponding e-mail, and if otherwise, proceeds to step 240 of executing the command.

In the last stage of operation, the code modulation-macroanalysis viewer proceeds to step 250, waiting for the next command of the email recipient.

The steps from the step 160 to the step 191 and the subordinate contents thereof may be omitted if the macro (s) is not included in the document portion.

The steps from the step 190 to the step 191 and the subordinate contents, or the step 230, the operation of the present invention can be omitted even if omitted.

According to the present invention, it is possible to provide a means for performing the opening of an e-mail using a mail reading terminal while preventing the infection of an e-mail computer virus in advance in advance without using a computer virus vaccine. have.

As a result, it is possible to eliminate the damage caused by the development of a new type of e-mail computer virus that has not yet been developed.

Claims (34)

The Code Modification-Macro Analysis Viewer, which prevents the infection of an email computer virus by code modulation and macro analysis, is in operation, is in the beginning of reception through the network, or has received email (s) complete. Constructing a mail reading terminal (a); The code modulation-macroanalysis viewer operating in step (a) generates a temporary header for the e-mail to be selected among the e-mail (s) of step (a), and then configures the contents of the e-mail. (B) modulating and reconstructing codes into codes that do not act as computer viruses by dividing the codes into original headers, document portions, and macro (s); (C) causing the code modulation-macroanalysis viewer to use the temporary header generated in the step (b) in place of the original header at the header position of the e-mail to be viewed in the step (b) to use as a header; The code modulation-macroanalysis viewer compares the code of the original header and the temporary header of step (b) to check whether the original header contains more than a certain amount of code (s) more than the temporary header. Step (d); As a result of the checking in the step (d), if the original header further includes a certain amount of code (s) more than the temporary header, the following step (s) are performed from the following step (f), and Otherwise (e) the code modulation-macroanalysis viewer controls its time-series operation order to proceed from the following step (g) to the subsequent step (s); The code modulation-macroanalysis viewer performing step (e) expresses the contents of the temporary header on the display screen of the mail reading terminal, and the original header addition code (s) included in the original header in step (d). (F) replacing the modulation codes of the document portion generated in step (b) with expression codes that do not act as computer viruses based on their respective modulation logics, and then displaying them on the screen; While the e-mail receiver browses the expressions displayed on the display screen of the mail reading terminal in step (f), the code modulation-macroanalysis viewer that performs step (f) is executed in step (d). (G) setting the original header addition code (s) included in the header as the virus inclusion estimation portion, and then proceeding from step (j) to step (s) below; The code modulation-macroanalysis viewer performing the step (e) expresses the contents of the temporary header on the display screen of the mail reading terminal, and modulates the modulation codes of the document portion generated in the step (b) with their respective modulation logic. Replacing with an expression code that does not act as a computer virus based on and then expressing on the screen (h); (I) viewing, by an e-mail receiver, expressions represented on a display screen of a mail reading terminal in step (h); The code modulation-macroanalysis viewer classifies each component of the modulation code state generated in step (b) into code types by comparing the constituent modulation codes with previously prepared code classification criteria tables and classifies the macro code combinations. Generating and comparing the reference code combination database prepared in advance to identify the function of the macro; Code Modulation-Macro Analysis Viewer displays the function description expression codes for expressing the function of the macro in the form of character-oriented description, or the operation result expression codes for expressing the expected operation result in the form of graphic-oriented description when the macro is operated. (K) locating in a database prepared in advance and sorting them in the order in which they are to be expressed to generate macro expression code packet (s); Expressing, by the code modulation-macro analysis viewer, the macro expression code packet (s) generated in the step (k) on the display screen of the mail reading terminal; A step (m) of the email recipient viewing the expressions represented on the display screen of the mail reading terminal in step (f) or step (h) or in step (l); The code modulation-macroanalysis viewer determines whether each of the macro code assembly (s) generated in step (j) is related to the document part of step (b) or is applied within the document part. Step (n); If the result of the determination in step (n) is not related to the document part or does not apply to the document part, the code modification-macro analysis viewer sets the macro including the macro code combination as the virus inclusion estimation part ( o); A step for providing a message on the display screen of a mail viewing terminal by means of a code modification-macroanalysis viewer, which allows an e-mail recipient to command a virus report request, an e-mail deletion request, or an e-mail normalization request or other commands. (p); During or after the e-mail recipient proceeds to view the step (m), by using the means provided on the screen in the step (p), the virus report request and the e-mail deletion request or the e-mail steady state setting request Command (q) or otherwise; If a virus report request is ordered in step (q), proceed to step (s) below from step (s), and in step (g) or step (o), the code modification-macro analysis viewer If there is a part set as the virus inclusion estimation part by the following step (u) and proceeds to the following step (s), otherwise the step (v) to the following step (s) below. (R) the code modulation-macroanalysis viewer controls its time-series operation order; (S) providing, by the code modulation-macroanalysis viewer, a means for allowing an e-mail recipient to set a virus inclusion estimation portion on the display screen of the mail reading terminal; Setting up, by the e-mail recipient, a virus containing presumption part using the means provided in step (s); The Code Modification-Macro Analysis Viewer uses the temporary header as a header, and transmits all the information material provided in the mail viewing terminal to the virus notification web site until the step (t) in relation to the e-mail to be viewed in the step (b). Transmitting (u) and then controlling its time-series operation sequence to proceed from the following step (w) to the subsequent step (s); In the above step (q), if an email deletion request is ordered, the code modulation-macroanalysis viewer requests the mail receiving website to delete the received email, and if the email normal state setting request is ordered, (B) the modulation-macroanalysis viewer requesting the mail-receiving website to set up the viewable steady state of the corresponding e-mail, and performing other commands if other items are ordered; And Code modulation-macroanalysis viewer, characterized in that it comprises a step (w) waiting for the next command of the email recipient, code modulation method computer virus prevention e-mail expression method The method of claim 1, In step (a) and subsequent step (s), the code modulation-macroanalysis viewer is executed without any processing (or action) causing a result of executing the computer virus included in the e-mail. The code constituting the content of the email to be viewed is modulated and reconstructed into codes that do not act as computer viruses, individually or in combination with each other, and until the email is confirmed to contain no computer viruses. By using the modulation codes instead of the original codes in all the handling procedures related to opening, the operation principle prevents the infection of the computer virus by preventing its operation even if the original code contains a computer virus. Code modulation method computer virus prevention e-mail expression method characterized in that The method of claim 1, In step (a) and subsequent step (s), the code modulation-macroanalysis viewer is executed without any processing (or action) causing a result of executing the computer virus included in the e-mail. Among the codes constituting the header of the e-mail to be viewed, only the basic element codes for the unique function of the header are selected to form a temporary header without a computer virus, and the e-mail does not contain the computer virus. Until this is confirmed, the temporary header is used in place of the original header in all handling procedures related to the opening of the e-mail, so that the original header contains a working principle that prevents the infection even if it contains a computer virus. Code modulation method computer virus prevention e-mail expression method characterized in that The method of claim 1, In step (a) and subsequent step (s), the code modulation-macroanalysis viewer, when the e-mail recipient performs an e-mail opening, constitutes the second header constituting the original header or document portion of the e-mail. Code modulation method computer, characterized in that the operation code is expressed on the display screen of the mail reading terminal by substituting the modulation codes of the paragraph with expression codes that do not act as computer viruses based on their respective modulation logics. How to Prevent Viruses The method of claim 1, In step (a) and subsequent step (s), the code modulation-macroanalysis viewer expresses the functions of each of the macro (s) included in the document portion of the e-mail in a text-oriented description form, or E) generating a macro-expression code packet (s) for expressing the expected operation results of each operation in the form of graphic-oriented descriptions, and displaying the mail browsing terminal when the e-mail recipient performs the e-mail opening. Code modulation method computer virus prevention e-mail expression method, characterized in that it comprises the operation principle expressed on the screen The method of claim 1, In the step (a) and the following step (s), the code modulation-macroanalysis viewer is configured to display the document part expression body while the email receiver browses the contents of the email to be viewed on the display screen of the mail reading terminal. Field contains abnormal portions (including characters and combinations of unrecognized forms, or portions containing one or two or more of the portions of the original document determined to have changed abnormally), or macro expression code packet (s) If it is determined that macro expressions using a) are not related to the document portion, or that macro expressions using macro expression code packet (s) are not applied inside the document portion, Code modulation computer virus, characterized in that it comprises a principle of operation to assume that the virus contained How to prevent e-mail The method of claim 1, In the step (a), the code modulation-macroanalysis viewer includes the code modulation-macroanalysis viewer of claim 2, 5, and 6 if the e-mail to be read does not contain macro (s). Code modulation method computer virus prevention e-mail expression method, characterized in that the operation can be omitted even if the portion related to the macro (s) in the principle of operation The method of claim 1, In the step (a), one method of constructing the code modulation-macroanalysis viewer to be in operation is to construct a mail reading terminal having the code modulation-macro analysis viewer first and then the code modulation-macro analysis viewer. In the operating state, characterized in that it comprises a method for constructing the mail browsing terminal to receive the e-mail (s), code modulation method computer virus prevention e-mail expression method The method of claim 1, In the step (a), one method of constructing the code modulation-macroanalysis viewer to be in operation is to first construct an e-mail reading terminal having the code modulation-macroanalysis viewer to receive the e-mail (s). Then, a code modulation method computer virus prevention e-mail expression method, characterized in that it comprises a method for constructing to perform the e-mail opening in the state that the code modulation-macro analysis viewer is in operation The method of claim 1, In the step (a), one method of holding the received e-mail (s) in the reception start phase or the completion of the reception is to receive the e-mail (s) to be transmitted while the mail browse terminal is first constructed and operated. Code modulation method computer virus prevention e-mail expression method characterized in that it comprises a holding method The method of claim 1, In the step (b), the temporary header, characterized in that the computer virus is not included by selecting and recombining the basic element codes necessary for the header, code modulation method computer virus prevention e-mail expression method The method of claim 1, In the step (b), the generation of the temporary header and the code modification are performed in a state in which no processing (or action) is performed to cause the result of executing the computer virus included in the e-mail to be viewed. , Code-modulation method, computer virus prevention e-mail expression method The method of claim 1, In the step (b), the method of modulating with codes that do not act as a computer virus has an arrangement sequence table in which modulation codes are arranged or one representation code corresponding to one modulation code in one-to-one correspondence. And a method of modulating in a manner of changing one or more of the value (or size) or the sequence of the codes, using a particular modulation logic that generates one or more of the code modulation tables of the < RTI ID = 0.0 > , Code-modulation method, computer virus prevention e-mail expression method The method of claim 1, One method for implementing the step (b) includes a method of first generating a temporary header using the original codes in a state in which code modulation is not implemented, and then executing the code modulation in the order of performing code modulation. Code modulation method computer virus prevention e-mail expression method The method of claim 1, One method of implementing the step (b) is to perform a code modulation first, and then in order to generate a temporary header by restoring the selected modulation codes from among the modulation codes of the original header to the original code state. Characterized by the code modulation method computer virus prevention e-mail expression method comprising The method of claim 1, In the step (b), the step of performing the code modulation for the macro (s), if not required, characterized in that the operation of the present invention can be omitted, code modulation method computer virus prevention e-mail expression method The method of claim 1, In the step (f) or the step (h), one method of replacing the modulation codes with the representation codes, using the code modulation table of claim 13 to find the representation code corresponding to each of the modulation codes, And a method for determining the arrangement order of each of the representation codes using the arrangement sequence table of claim 13. The method of claim 1, In the step (j), one method of preparing a code classification reference table is a method of preparing a database type code classification reference table by classifying codes constituting macros applicable to various document writers into operation codes, auxiliary codes, and variable codes. Characterized in that the code modulation method computer virus prevention e-mail expression method comprising a The method of claim 1, In the step (j), one method of classifying by code type includes a method of classifying into an operation code, an auxiliary code, and a variable code. The method of claim 1, In the above step (j), one method of generating a macro code combination includes: an auxiliary code (s) for assisting the operation code with respect to one operation code and for the operation code or the auxiliary code (s). Code modulation method computer virus prevention e-mail expression method comprising a method of generating a single code combination by considering the variable code (s) in relation to each other and the original arrangement order The method of claim 1, In the step (j), one method of preparing a reference code assembly database is based on an auxiliary code (s) and an assistance code or the auxiliary code (s) centering on one operation code and supporting the operation code. Generating code combinations that combine the variable code (s) of the variable code (s) to have a macro function in consideration of each other's connection relationship and arrangement order, in any form that can be generated using codes classified in the code classification criteria table of claim 18. And preparing a database in a form of a database in which unique code numbers are assigned to each of the generated code combinations. The method of claim 1, In the step (j), one method of identifying a macro function by comparing with a reference code assembly database is to compare and search the generated macro code assembly with a prepared reference code assembly database, thereby preparing a macro code assembly suitable for the generated macro code assembly. Code modulation method computer virus prevention e-mail expression method characterized by including a method of grasping the function of a macro by finding a unique number The method of claim 1, In the step (k), one method of preparing the function description expression codes or the operation result expression codes in the database is that the function description expression codes or the operation result expression codes are attached to the macro code combination unique number of the above 21. Code modulation method computer virus prevention e-mail expression method comprising a method of preparing in the form of a database The method of claim 1, In the step (l), one method of expressing the macro expression code packet (s) on the screen includes the operation result expression codes constituting the macro expression code packet, the screen in the step (f) or the step (h). Code modulation method computer virus prevention e-mail, characterized in that it comprises a method of expressing distinctly recognized from the document part content expressions, the part of the document part content expressions expressed in the applied macro. Expression method The method of claim 1, In the step (l), one method of expressing the macro expression code packet (s) on the screen includes the operation result expression codes constituting the macro expression code packet, the screen in the step (f) or the step (h). Code modulation method computer virus prevention e-mail expression, characterized in that it includes a method for expressing the macro in the portion of the document content representations expressed in the applied macro, in the time-series operation order in which the macro is operated. Way The method of claim 1, In the step (l), in the case where the macro is not related to the document part or does not apply to an area inside the document part, one method of expressing the macro expression code packet (s) on the screen constitutes a macro expression code packet. And a method of expressing the operation result expression codes to an external area of the document part content expressions expressed on the screen in the step (f) or the step (h). How to express The method of claim 1, In the step (l), in the case where the macro is not related to the document part or does not apply to an area inside the document part, one method of expressing the macro expression code packet (s) on the screen constitutes a macro expression code packet. Code modulation method computer virus prevention e-mail expression method, characterized in that it comprises a method for expressing the operation result representation code to be expressed in the time-series operation order in which the macro is operated. The method of claim 1, In the step (n), one method of determining whether or not related to the document portion is, a method of determining whether the macro code assembly to be determined is a macro code combination usable in the document writer used to create the document portion. Characterized by the code modulation method computer virus prevention e-mail expression method comprising The method of claim 1, In the step (n), one method of determining whether or not related to the document part includes a method of determining whether the macro code assembly to be determined is a macro code combination related to the content of the document part. Code modulation method computer virus prevention e-mail expression method The method of claim 1, In the step (n), one method of determining whether or not to be applied to the inside of the document part is that when the macro code assembly to be judged is displayed on the display screen of the mail reading terminal, Code modulation method computer virus prevention e-mail expression method, characterized in that it comprises a method for determining whether it is a macro code combination that operates to be expressed inside the expression area The method of claim 1, In the step (p), one form of the means provided on the screen is an item display button that can be clicked (or displayed) or inputted on the display screen of the mail reading terminal using a mouse (or an electronic pen) or a keyboard. Code modulation method computer virus prevention e-mail expression method characterized in that it comprises a form The method of claim 1, In the step (s), one form of the means for setting is such that a virus-containing estimated portion can be displayed on the display screen of the mail reading terminal using a mouse (or an electronic pen) or a keyboard so as to be identified. Code modulation method computer virus prevention e-mail expression method characterized in that the form comprising a means The method of claim 1, The steps from (j) to (o) and the claims from Claims 18 to 30 dependent thereon may be omitted if the document portion does not include macro (s). Code modulation method computer virus prevention e-mail expression method characterized in that the operation of the invention The method of claim 1, The steps from (n) to (o) and the claims from claim 28 to claim 30, but the step (u), it is possible to operate the invention even if omitted Code modulation method computer virus prevention e-mail expression method characterized by