KR101504697B1 - Method, server, client apparatus, and recording medium for controlling cyclic redundancy check - Google Patents

Abstract

The present invention relates to a cyclic redundancy check, and more particularly, to a cyclic redundancy check control method, a server, a client apparatus, and a recording medium, which enable efficient cyclic redundancy checking in terms of speed or security.

Description

METHOD, SERVER, CLIENT APPARATUS, AND RECORDING MEDIUM FOR CONTROLLING CYCLIC REDUNDANCY CHECK BACKGROUND OF THE INVENTION 1. Field of the Invention [

The present invention relates to a method for controlling cyclic redundancy checking, a server, a client apparatus, and a recording medium.

Conventional Cyclic Redundancy Check (CRC) is a technique for verifying integrity, and verifies integrity by checking the entire area of a target file to verify integrity from start to end.

Such a conventional cyclic redundancy check method, that is, a full check method for checking the entire area of an object to be verified from the beginning to the end, may be the most aggressive countermeasure against malicious file modification. However, There is a problem that the inspection time takes too long.

Particularly, in the case of providing a service such as a game, if it takes too long time to perform the cyclic redundancy check which is necessarily performed, the user may feel considerable inconvenience, and in some cases, You can do it.

In view of the foregoing, it is an object of the present invention to provide a cyclic redundancy check control method, a server, a client apparatus, and a recording medium, which enable an efficient cyclic redundancy check to be performed.

It is another object of the present invention to provide a cyclic redundancy check control method, a server, a client apparatus, and a recording medium, which enable a high-speed cyclic redundancy check to be performed.

It is another object of the present invention to provide a cyclic redundancy check control method, a server, a client apparatus, and a recording medium, which enable highly reliable cyclic redundancy check to be performed.

Another object of the present invention is to provide a cyclic redundancy check control method, a server, a client apparatus, and a recording medium, which can selectively increase one of the speed of cyclic redundancy check and the security improvement.

In order to achieve the above-mentioned object, in one aspect, the present invention provides a method for controlling an access control apparatus, comprising: a cyclic redundancy check control request receiving unit for receiving a cyclic redundancy check control request from a client apparatus; And setting a cyclic redundancy check level corresponding to the client apparatus when the cyclic redundancy check control request is received and transmitting cyclic redundancy check control information according to the set cyclic redundancy check level to the client apparatus, And a cyclic redundancy check controller for controlling cyclic redundancy check of the cyclic redundancy check.

In another aspect, the invention provides a method for a server to control cyclic redundancy checking, comprising: receiving a cyclic redundancy check control request from a client device; And setting a cyclic redundancy check level corresponding to the client apparatus when the cyclic redundancy check control request is received and transmitting cyclic redundancy check control information according to the set cyclic redundancy check level to the client apparatus, And controlling the cyclic redundancy check of the cyclic redundancy check.

In another aspect, the invention provides a method for a client device to control a cyclic redundancy check, comprising: sending a cyclic redundancy check control request to a server; And receiving, from the server, the cyclic redundancy check control information according to the cyclic redundancy check level set corresponding to the client apparatus after transmitting the cyclic redundancy check control request, the cyclic redundancy check control information based on the received cyclic redundancy check control information, And a step of executing a check.

According to another aspect of the present invention, there is provided a cyclic redundancy check control request transmission unit for transmitting a cyclic redundancy check control request to a server; And receiving, from the server, the cyclic redundancy check control information according to the cyclic redundancy check level set corresponding to the client apparatus after transmitting the cyclic redundancy check control request, the cyclic redundancy check control information based on the received cyclic redundancy check control information, And a cyclic redundancy check execution section for executing a check.

According to another aspect of the present invention, there is provided a recording medium on which a program for causing a client apparatus to execute a cyclic redundancy check control method is recorded, the program causing the client apparatus to transmit a cyclic redundancy check control request to a server, A function of receiving a cyclic redundancy check control information according to a level from a server, and a program for implementing a cyclic redundancy check based on the received cyclic redundancy check control information, is recorded on a computer-readable recording medium do.

As described above, according to the present invention, it is possible to provide a cyclic redundancy check control method, a server, a client apparatus, and a recording medium that enable an efficient cyclic redundancy check.

In addition, according to the present invention, there is provided an apparatus for controlling cyclic redundancy check, a server, a client apparatus, and a recording medium, which enable a high-speed cyclic redundancy check to be performed.

In addition, according to the present invention, a cyclic redundancy check control method, a server, a client apparatus, and a recording medium are provided which enable highly reliable cyclic redundancy check to be performed.

According to another aspect of the present invention, there is provided a cyclic redundancy check control method, a server, a client apparatus, and a recording medium, which can selectively increase one of the speed of cyclic redundancy check and the security improvement.

1 is a schematic diagram of a system for cyclic redundancy check control according to an embodiment of the present invention.
2 is a block diagram of a server for controlling cyclic redundancy check according to an embodiment of the present invention.
3 is a diagram illustrating a cyclic redundancy check level setting method for cyclic redundancy check control according to an embodiment of the present invention.
4 is a diagram illustrating cyclic redundancy check control information for cyclic redundancy check control according to an embodiment of the present invention.
5 is a diagram illustrating a field of cyclic redundancy check control information for cyclic redundancy check control according to an embodiment of the present invention.
6 is a flowchart illustrating a method of controlling a cyclic redundancy check according to an exemplary embodiment of the present invention.
7 is a block diagram of a client apparatus for controlling cyclic redundancy check according to an embodiment of the present invention.
8 is a flowchart of a method for controlling a cyclic redundancy check by a client apparatus according to an exemplary embodiment of the present invention.
9 is a diagram illustrating a client device performing a cyclic redundancy check according to an embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference numerals even though they are shown in different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

In describing the components of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected to or connected to the other component, It should be understood that an element may be "connected," "coupled," or "connected."

FIG. 1 is a diagram schematically illustrating a system for cyclic redundancy check (CRC) control according to an embodiment of the present invention. Referring to FIG.

Referring to FIG. 1, a system for controlling cyclic redundancy check according to an exemplary embodiment of the present invention includes a client device 110 that actually performs a cyclic redundancy check, a client device 110 that controls a cyclic redundancy check in the client device 110, Server 100 and the like.

The client device 110 transmits a cyclic redundancy check control request to the server 100 before actually performing the cyclic redundancy check.

Accordingly, the server 100 receives the cyclic redundancy check control request and transmits the cyclic redundancy check control information for controlling the cyclic redundancy check in the client device 110 to the client device 110.

Thereafter, the client device 110 receives the cyclic redundancy check control information from the server 100, and executes the cyclic redundancy check according to the received cyclic redundancy check control information.

Depending on the results of this cyclical redundancy check, the client device 110 may be allowed or blocked from accessing the server 100, or application execution associated with a game or the like in the client device 110 may be allowed or blocked have.

According to an embodiment of the present invention, when performing a cyclic redundancy check on a file (which may be a single file or a plurality of files) related to a game or the like, the client device 110 may check (Partial check), or only a part of the file can be checked (partial check).

In this regard, the client device 110 must know whether to execute the cyclic redundancy check of the full check type or the cyclic redundancy check of the partial check type.

Therefore, the server 100 may include the cyclic redundancy check type indication information indicating the cyclic redundancy check type into the cyclic redundancy check control information, and transmit the cyclic redundancy check type control information to the client device 110. [

In addition, when the cyclic redundancy check is executed as a partial check type, the file is divided into several sections, and the inspection is carried out by using only a certain area in each divided section as the inspection area.

In order for the client device 110 to execute the cyclic redundancy check of the partial check type, the server 100 determines the number of cyclic redundancy check intervals indicating the number of sections of the file to be divided, Size of the cyclic redundancy check area, the size of the cyclic redundancy check value, and the like are included in the cyclic redundancy check control information, and are transmitted to the client device 110.

The cyclic redundancy check control method according to an embodiment of the present invention briefly described above will be described in more detail with reference to FIG. 2 to FIG.

The client device 110 described herein may include a general PC such as a general desktop or a notebook computer, and may include a mobile terminal such as a smart phone, a tablet PC, a PDA (Personal Digital Assistants), and a mobile communication terminal However, the present invention is not limited to this, and should be broadly interpreted as any electronic device (terminal) capable of communicating with the server 100.

The above-described server 100 has the same hardware configuration as that of a typical Web server, a web application server, or a WAP server. However, as described in detail below with reference to FIG. 2, a software module that is implemented in any language such as C, C ++, Java, PHP, .Net, Python, Ruby, (Module).

The server 100 may also be connected to an unspecified number of client devices (including the client device 110) and / or other servers via the network 120, Or a computer software (server program) installed for such a computer system. The computer program may be stored in a computer readable recording medium.

In addition to the above-described server programs, the server 100 may also include a broad concept including a series of application programs running on the server 100 and, in some cases, various databases built in or outside the server 100 It should be understood.

Here, the database may mean a collection of data structured by managing data such as information or data for use by a server or another device, and may mean a storage medium storing an aggregate of such data.

Such a database may include a plurality of databases classified according to a data structure, a management method, and the like.

In some cases, the database may include a database management system (DBMS), which is software that allows the user to add, modify, delete, etc. information or data.

In addition, the server 100 can store and manage content, various information, and data in a database. Here, the database may be implemented inside or outside the server 100.

The server 100 may use a server program that is variously provided according to an operating system such as DOS, Windows, Linux, UNIX, or Macintosh to general server hardware Typical examples include a Web site used in a Windows environment, an Internet Information Server (IIS), Apache, Nginx, and Light HTTP used in a UNIX environment.

The network 120 may be a closed network such as a LAN (Local Area Network) or a WAN (Wide Area Network) Internet). Herein, the Internet includes various services existing in the upper layer of the TCP / IP protocol such as HyperText Transfer Protocol (HTTP), Telnet, File Transfer Protocol (FTP), Domain Name System (DNS), Simple Mail Transfer Protocol (NFS), and Network Information Service (NIS), which are used in the Internet.

In addition, when the client device 110 includes a mobile terminal such as a smart phone, a tablet PC, a PDA (Personal Digital Assistants), and a mobile communication terminal, the network 120 may be a wireless terminal such as a mobile communication network or a WiFi And may further include a network.

2 is a block diagram of a server 100 for controlling cyclic redundancy check according to an embodiment of the present invention.

Referring to FIG. 2, the server 100 for controlling the cyclic redundancy check according to an embodiment of the present invention includes a cyclic redundancy check control request receiver 210 for receiving a cyclic redundancy check control request from the client device 110, , When the cyclic redundancy check control request is received, the cyclic redundancy check level corresponding to the client device 110 is set, and the cyclic redundancy check control information according to the set cyclic redundancy check level is transmitted to the client device 110, And a cyclic redundancy check control unit 220 for controlling the cyclic redundancy check in the storage unit 110 and the like.

The above-mentioned "cyclic redundancy check control information" is information for controlling the client device 110 that has transmitted the cyclic redundancy check control request to execute the cyclic redundancy check, and the client device 110 ) Is information for informing how many areas should be checked in the file when the cyclic redundancy check is executed.

As a more detailed example, the cyclic redundancy check control information may indicate whether to perform a full check (which may be referred to as a close check) or a partial check (also referred to as a fast check or interval check) of the file. Here, the partial check means that the file is divided into several sections and only a partial area of each divided section is inspected.

The cyclic redundancy check control information is generated based on the cyclic redundancy check level set corresponding to the client device 110 that has transmitted the cyclic redundancy check control request and is transmitted to the client device 110.

The "cyclic redundancy check level" referred to when generating the cyclic redundancy check control information is a level of how much the client device 110 that has transmitted the cyclic redundancy check control request should check the area in the file when the cyclic redundancy check is executed Is a numerical value or information.

This cyclic redundancy check level is information for determining the size of the check area and is information that affects the accuracy (accuracy) and speed (time) of the check. Here, the higher the accuracy of the inspection, that is, the larger the size of the inspection area, the more the security is improved and the inspection speed is lowered.

In this regard, as the cyclic redundancy check level is set higher, the client device 110 performs the cyclic redundancy check on more areas of the file. Thus, the high level of the cyclic redundancy check has the disadvantage of slowing down the cyclic redundancy check rate while increasing the security level (meaning how good the security is).

On the other hand, as the cyclic redundancy check level is set lower, the client device 110 performs a cyclic redundancy check on a smaller area of the file. The low level of the cyclic redundancy check is advantageous in that the cyclic redundancy check speed is increased, but the security level is lowered.

As described above, regarding the cyclic redundancy check level setting, the cyclic redundancy check rate and the security level have a trade-off relationship.

Hereinafter, a cyclic redundancy check level setting method considering a cyclic redundancy check speed, a security level, and the like will be described in more detail with reference to FIG. 3, which illustrates an exemplary cyclic redundancy check level setting method.

① First cyclic redundancy check level setting method (first method)

Referring to FIG. 3, as a first cyclic redundancy check level setting method, the cyclic redundancy check control unit 220 determines whether the service provider speeds up the "service speed" Level "), the cyclic redundancy check level can be set according to what the service quality factor set by the service provider is.

For example, when there are two levels, i.e., a first level and a second level, which can be set as the cyclic redundancy check level, the cyclic redundancy check control unit 220 sets the cyclic redundancy check level And the cyclic redundancy check level can be set to the second level when the quality of service factor is set to security. Here, the second level is higher than the first level.

② Second cyclic redundancy check level setting method (second method)

Referring to FIG. 3, as a second cyclic redundancy check level setting method, the cyclic redundancy check control unit 220 sets a cyclic redundancy check level according to "cyclic redundancy check rate information" or "security level information" set by the service provider .

The cyclic redundancy check control unit 220 can set a cyclic redundancy check level corresponding to the cyclic redundancy check rate information set by the service provider.

For example, when the cyclic redundancy check rate information is set to a high speed among low speed, medium speed and high speed, the lowest cyclic redundancy check level corresponding to high speed can be set. When the cyclic redundancy check rate information is set to a low rate among low, medium, and high speed, the highest cyclic redundancy check level corresponding to the low rate can be set.

The cyclic redundancy check control unit 220 can set a cyclic redundancy check level corresponding to the security level information set by the service provider.

For example, when the security level information is set to high security requirement information among high security requirement information, intermediate security requirement information and low security requirement information, the highest cyclic redundancy check level corresponding to high security requirement information can be set. When the security level information is set as low security requirement information among high security requirement information, intermediate security requirement information and low security requirement information, it is possible to set the lowest cyclic redundancy check level corresponding to low security requirement information.

③ Third cyclic redundancy check level setting method (third method)

Referring to FIG. 3, as a third cyclic redundancy check level setting method, the cyclic redundancy check control unit 220 performs cyclic redundancy check according to the "security level for each user" You can set the level.

The third cyclic redundancy check level setting method is a method in which a cyclic redundancy check level can be set differently for each user depending on how reliable a user using the service is from a security point of view. That is, unlike the above two methods, this method can control the speed (time) and security level of the cyclic redundancy check differently for each user.

For example, if the service to be used is a highly reliable or reliable user in terms of security, the cyclic redundancy check control unit 220 sets the cyclic redundancy check level to a low level so that the check area for the cyclic redundancy check becomes small Can be set. On the other hand, if the user is a user with low reliability or unreliability in terms of security, the cyclic redundancy check control unit 220 can set the cyclic redundancy check level high so that the number of check regions for the cyclic redundancy check increases.

For the third cyclic redundancy check level scheme, the cyclic redundancy check control unit 220 may analyze the traffic or log related to the server connection history or the service use for each user to monitor the security inhibiting activity for each user.

The cyclic redundancy check control unit 200 may generate or update a security-inhibiting-action monitoring result for each user as a result of monitoring the security-blocking behavior for each user, and may determine a security level for each user based on the generated security- The security level for each user is information indicating how much the user has performed the security inhibiting action and is an indicator of how reliable the user is in terms of security. A user with a lower security level (LOW) is a user with higher reliability, and a user with a higher security level (HIGH) is a user with lower reliability.

The above-mentioned security inhibiting action refers to all actions that a user accesses the server 100 and threatens security, and for example, hacking and the like may be included therein.

As a result of monitoring the security inhibiting action, the security inhibiting action monitoring result information may include, for example, information on the date of the security inhibiting action, user access information on the security blocking action, and the number of security blocking actions.

For example, when the security inhibiting action is a hacking attempt, the security inhibiting action monitoring result information includes information on the hacking attempt date, user access information on the hacking attempt, the number of hacking attempts (the number of security hacking attempts) . ≪ / RTI >

The cyclic redundancy check control unit 200 sets the user security level to be lower as the number of times of the security inhibiting action is determined to be higher as the security reliability of the user is higher and determines that the security reliability of the user is lower as the number of times of the security inhibiting action increases, The grade can be set high.

The cyclic redundancy check control unit 200 sets the cyclic redundancy check level based on the security level for each user, but the lower the security level for each user (i.e., the more the user is highly reliable in terms of security), the lower the cyclic redundancy check level , And the higher the security level for each user (i.e., the lower the reliability of the user in terms of security), the higher the cyclic redundancy check level can be set.

As described above, the cyclic redundancy check control unit 220 receives the cyclic redundancy check control request from the client apparatus 110, sets the cyclic redundancy check level corresponding to the client apparatus 110, And transmits the cyclic redundancy check control information according to the cyclic redundancy check level to the client apparatus 110.

In the following, a method of generating cyclic redundancy check control information according to a set cyclic redundancy check level will be described.

The cyclic redundancy check control unit 220 determines whether the client device 110 should perform a full check or a partial check on the file according to the set cyclic redundancy check level. That is, the cyclic redundancy check control unit 220 determines whether the cyclic redundancy check type is a full check type or a partial check type.

For example, the cyclic redundancy check control unit 220 may determine the cyclic redundancy check type as the entire check type if the set cyclic redundancy check level is a predetermined entire check level or is included in the entire check level range. The cyclic redundancy check control unit 220 may determine the cyclic redundancy check type as a partial check type if the set cyclic redundancy check level is a predetermined partial check level or a partial check level range.

The cyclic redundancy check control unit 220 generates cyclic redundancy check control information including cyclic redundancy check type indication information indicating the cyclic redundancy check type based on the result of determination of the cyclic redundancy check type based on the set cyclic redundancy check level To the client device (110).

That is, if it is determined that the cyclic redundancy check type is a full check type as a result of judging the cyclic redundancy check type based on the set cyclic redundancy check level, the cyclic redundancy check control unit 220 instructs the entire check type as a cyclic redundancy check type To the client apparatus 110. The cyclic redundancy check control information includes cyclic redundancy check type information (e.g., A) If the cyclic redundancy check type is determined as a partial check type based on the cyclic redundancy check type determined based on the set cyclic redundancy check level, the cyclic redundancy check control unit 220 instructs the partial check type as the cyclic redundancy check type And cyclic redundancy check control information including cyclic redundancy check type indication information (e.g., P) to be transmitted to the client apparatus 110. [

If the cyclic redundancy check type is determined as a partial check type based on the cyclic redundancy check type determined based on the set cyclic redundancy check level, the cyclic redundancy check control unit 220 determines that the cyclic redundancy check interval corresponding to the set cyclic redundancy check level And a cyclic redundancy check value, and transmits the generated cyclic redundancy check control information to the client apparatus 110. [0050] FIG.

The cyclic redundancy check control unit 220 determines the number of cyclic redundancy check intervals, the size of the check area for each cyclic redundancy check interval, and the cyclic redundancy check value based on the set cyclic redundancy check level.

For example, the cyclic redundancy check control unit 220 sets the number of cyclic redundancy check intervals to be smaller and the size of the check region for each cyclic redundancy check interval to be smaller as the set cyclic redundancy check level is lower, and the higher the cyclic redundancy check level It is possible to set a large number of cyclic redundancy check intervals and to set a large check range size for each cyclic redundancy check interval.

A method of determining (setting) the number of cyclic redundancy check intervals, the check area size of each cyclic redundancy check interval, and the cyclic redundancy check value based on the set cyclic redundancy check level will be described in connection with the cyclic redundancy check level setting method It is as follows.

According to the first cyclic redundancy check level setting method, when the service quality factor is set to the service rate rather than to the security level, the cyclic redundancy check level can be set to be low and accordingly, the number of cyclic redundancy check intervals is set to be small And the size of the check area for each cyclic redundancy check interval may be set to be small.

When the cyclic redundancy check rate information is set to a higher speed than when the cyclic redundancy check rate information is set to low speed or according to the second cyclic redundancy check level setting method or when the security level is set to lower security requirement information than when security level information is set to high security requirement information, The cyclic redundancy check level can be set to be low, so that the number of cyclic redundancy check intervals can be set small and the size of the check area for each cyclic redundancy check interval can be set small.

The level of the cyclic redundancy check may be set to be low when the security level of the user is set to be lower than that of the third cyclic redundancy check level setting method and accordingly the number of cyclic redundancy check intervals is set to be small, The size of the inspection area for each redundant inspection section may be set small.

On the other hand, when the cyclic redundancy check level is set according to the receipt of the cyclic redundancy check control request, the cyclic redundancy check controller 220 checks the number of cyclic redundancy check intervals corresponding to the set cyclic redundancy check levels, Area size and cyclic redundancy check value can be set immediately.

The cyclic redundancy check control unit 220 sets and stores the number of the cyclic redundancy check intervals, the check area size for each cyclic redundancy check interval, and the cyclic redundancy check values in advance for each settable cyclic redundancy check level, The number of cyclic redundancy check intervals stored corresponding to the cyclic redundancy check level set according to the reception of the control request, the size of the check area for each cyclic redundancy check interval, and the cyclic redundancy check value.

A method of generating the cyclic redundancy check control information will be described with reference to FIG.

4 is a diagram illustrating cyclic redundancy check control information for cyclic redundancy check control according to an embodiment of the present invention. In FIG. 4, it is assumed that the third cyclic redundancy check level setting method is applied.

4, the cyclic redundancy check control unit 220 analyzes the security inhibiting actions for the user 1, the user 2, and the user 3. As a result, the number of the security inhibiting actions (the number of hacking attempts) 2 is the number of security incapacity actions (the number of hacking attempts) is 2, and the user 3 is analyzed that the number of security incapacity actions (hacking attempts) is 5 times.

Thereafter, the cyclic redundancy check control unit 220 sets the user security level of the user 1 to a low level (LOW) requiring the lowest level of security according to the number of security inhibiting actions of each user, The security level is set to the medium level (MEDIUM), and the user security level of the user 3 is set to a high level (HIGH) requiring the highest level of security.

Thereafter, the cyclic redundancy check control unit 220 sets the cyclic redundancy check level for the user 1 to the level 1 (Lv) corresponding to the low level (LOW), which is the user security level of the user 1, according to the third cyclic redundancy check level setting method 1), the cyclic redundancy check level for user 2 is set to level 2 (Lv.2) corresponding to the middle level (MEDIUM), which is the user security level of user 2, and the cyclic redundancy check level Is set to level 3 (Lv.3) corresponding to the high level (HIGH) which is the user security level of the user 3. [

At this time, the cyclic redundancy check control unit 220 determines that the cyclic redundancy check type is a partial check type when the cyclic redundancy check level is level 1 (Lv.1) and level 2 (Lv.2) In the case of level 3 (Lv.3), the type of cyclic redundancy check is judged to be the whole test type. If the cyclic redundancy check type is a partial check type, it is assumed that the cyclic redundancy check type indication information indicating the cyclic redundancy check type is 1. If the cyclic redundancy check type is a full check type, .

When the cyclic redundancy check type is determined to be the full check type, the cyclic redundancy check control unit 220 determines whether the cyclic redundancy check type is a full check type, Information can be generated and transmitted to the client device 110. [

If the cyclic redundancy check type is determined to be a partial check type, the cyclic redundancy check control unit 220 determines whether the cyclic redundancy check type is a partial check type, Information can be generated and transmitted to the client device 110. [

If the cyclic redundancy check type is determined to be a partial check type, the cyclic redundancy check control unit 220 generates cyclic redundancy check control information including partial check related control information according to the cyclic redundancy check level, 110). In this manner, when the cyclic redundancy check control information includes the partial check related control information, the cyclic redundancy check type indication information (1) indicating that the cyclic redundancy check type is the partial check type is not included in the cyclic redundancy check control information It is possible.

The partial test related control information may include, for example, the number of cyclic redundancy check intervals corresponding to the set cyclic redundancy check level, the size of the check area for each cyclic redundancy check interval, and the cyclic redundancy check value.

4, when the cyclic redundancy check level is level 1 (Lv. 1), the number of cyclic redundancy check intervals is 8, the size of the check area per cyclic redundancy check interval is 32 KB (Kbyte), and the cyclic redundancy check value is CRC_V1 Can be set. If the cyclic redundancy check level is level 2 (Lv.2), the number of cyclic redundancy check intervals is 16, the size of the check area per cyclic redundancy check interval is 64 KB, and the cyclic redundancy check value can be set to CRC_V2.

5 is a diagram illustrating a field of cyclic redundancy check control information for cyclic redundancy check control according to an embodiment of the present invention.

FIG. 5A is a diagram illustrating cyclic redundancy check control information generated when the cyclic redundancy check type is determined to be a full check type. At this time, the cyclic redundancy check control information includes cyclic redundancy check type indication information (0) indicating that the cyclic redundancy check type is the full check type and cyclic redundancy check value. The client device 110 receives the cyclic redundancy check control information, confirms that the cyclic redundancy check type indication information is set to 0, executes the cyclic redundancy check corresponding thereto, and outputs the obtained value as the cyclic redundancy check control information included in the cyclic redundancy check control information It is judged to be normal if they match with each other, and if not, it is judged that the file has been modulated.

5B is a diagram illustrating cyclic redundancy check control information generated when the cyclic redundancy check type is determined to be a partial check type. At this time, the cyclic redundancy check control information includes cyclic redundancy check type indication information (1) indicating that the cyclic redundancy check type is a partial check type, the number of cyclic redundancy check intervals, the check area size of each cyclic redundancy check interval, . The client device 110 recognizes that the cyclic redundancy check type indication information is set to 1 by receiving the cyclic redundancy check control information, recognizes that the partial check should be performed, and stores the file in a section corresponding to the number of cyclic redundancy check intervals A cyclic redundancy check is performed for each of the divided cyclic redundancy check intervals for each of the divided cyclic redundancy check intervals, and the obtained value is compared with the cyclic redundancy check values included in the cyclic redundancy check control information, If they do not match, it is determined that the file is modulated (see FIG. 9).

1, the server 100 for controlling the cyclic redundancy check according to an exemplary embodiment of the present invention performs a cyclic redundancy check according to the cyclic redundancy check in the client 110, And a service control unit 230 for controlling whether or not an application can be executed in the client apparatus 110 or not.

The service control unit 230 can receive cyclic redundancy check result information from the client apparatus 110. [

The service control unit 230 receives the cyclic redundancy check result information from the client apparatus 110 and checks whether the value obtained as a result of the cyclic redundancy check execution in the client apparatus 110 matches the cyclic redundancy check value included in the cyclic redundancy check control information It is possible to control so that the client device 110 can continuously connect to the server 100 or control the application to be executable in the client device 110 in cooperation with the client device 110. [

The service control unit 230 receives the cyclic redundancy check result information from the client apparatus 110 and checks whether the value obtained as a result of the cyclic redundancy check execution in the client apparatus 110 matches the cyclic redundancy check value included in the cyclic redundancy check control information It is possible to control the client device 110 to be disconnected from the server 100 or to control the execution of the application in the client device 110 in cooperation with the client device 110. [

Hereinafter, a method of controlling the cyclic redundancy check by the server 100 according to an embodiment of the present invention will be briefly described again with reference to FIG.

FIG. 6 is a flowchart of a method by which the server 100 controls cyclic redundancy check according to an embodiment of the present invention.

Referring to FIG. 6, a method of controlling a cyclic redundancy check according to an exemplary embodiment of the present invention includes a step S610 of receiving a cyclic redundancy check control request from a client device 110, The client apparatus 110 sets the cyclic redundancy check level corresponding to the cyclic redundancy check level and controls the cyclic redundancy check in the client apparatus 110 by transmitting the cyclic redundancy check control information according to the set cyclic redundancy check level to the client apparatus 110 Step S620, and the like.

Referring to FIG. 6, after controlling the cyclic redundancy check (S620), it is determined whether connection to the client device 110 is possible or not according to the cyclic redundancy check result in the client device 110, (Step S630) may be further performed.

2 to 6, a method of controlling the cyclic redundancy check according to an embodiment of the present invention has been described in terms of the server 100. In the following, referring to FIGS. 7 to 9, A method for controlling the cyclic redundancy check according to an embodiment of the invention will be described in terms of the client device 110.

7 is a block diagram of a client device 110 for controlling cyclic redundancy checking according to an embodiment of the present invention.

Referring to FIG. 7, the client apparatus 110 for controlling the cyclic redundancy check according to an embodiment of the present invention transmits a cyclic redundancy check control request for requesting control to execute the cyclic redundancy check to the server 100 (100 The server 100 transmits the cyclic redundancy check control information according to the cyclic redundancy check level set corresponding to the client device 110 after transmitting the cyclic redundancy check control request, And a cyclic redundancy check execution unit 720 for executing cyclic redundancy check based on the received cyclic redundancy check control information.

7, the client apparatus 110 that controls the cyclic redundancy check according to an exemplary embodiment of the present invention checks the cyclic redundancy check based on the cyclic redundancy check based on the received cyclic redundancy check control information And a service control unit 730 for controlling whether or not the server 100 can be connected to the server 100 or whether the service can be executed.

The cyclic redundancy check control method briefly described with reference to FIG. 7 will be described in more detail with reference to FIGS. 8 and 9. FIG.

Figure 8 is a flow diagram of a method by which a client device 110 in accordance with an embodiment of the present invention controls cyclic redundancy checking.

Referring to FIG. 8, a method of controlling a cyclic redundancy check according to an exemplary embodiment of the present invention includes transmitting a cyclic redundancy check control request to a server 100 (S810) Upon receiving the cyclic redundancy check control information according to the cyclic redundancy check level set corresponding to the client device 110 after transmitting the check control request to the server 100, And executing a cyclic redundancy check based on the check result (S820).

8, the method for controlling the cyclic redundancy check of the client device 110 according to an embodiment of the present invention may include a cyclic redundancy check (S820) (S830) controlling whether connection to the server 100 or availability of the service can be performed according to the result of executing the cyclic redundancy check based on the control information.

The above-mentioned cyclic redundancy check level is, for example, set to the first level when the setting of the quality of service factor is the service speed, or to the first level when the setting of the quality of service factor is secure. It may be set to 2 levels (see the first cyclic redundancy check level setting method).

As another example, the above-mentioned cyclic redundancy check level may be set corresponding to preset cyclic redundancy check rate information or may be set corresponding to preset security level information (see the second cyclic redundancy check level setting method) .

As another example, the above-mentioned cyclic redundancy check level may be set according to the security level of the user determined based on the result of monitoring the security inhibiting action of the user of the client device 110 (the third cyclic redundancy check Level setting method).

At this time, the cyclic redundancy check level is set to be lower as the security level of the user is lower, and may be set higher as the security level of the user is higher.

The above-mentioned security inhibiting action monitoring result information may include, for example, information on the number of security blocking actions. Here, the number of security inhibiting actions may be, for example, the number of hacking attempts.

On the other hand, the cyclic redundancy check control information may include cyclic redundancy check type indication information indicating the cyclic redundancy check type determined by the server 100 based on the set cyclic redundancy check level.

Here, the cyclic redundancy check type may be, for example, one of a full check type in which the entire file is to be inspected and a partial check type in which a portion of the file is inspected.

When the server 100 determines that the cyclic redundancy check type is the partial check type, the cyclic redundancy check control information includes the number of cyclic redundancy check intervals corresponding to the set cyclic redundancy check levels, the size of the check area for each cyclic redundancy check interval, Inspection values, and the like.

At this time, the number of the cyclic redundancy check intervals and the size of the check area for each cyclic redundancy check interval are set to be smaller as the set cyclic redundancy check level is set lower, and may be set larger as the set cyclic redundancy check level is higher. The cyclic redundancy check value is a cyclic redundancy check value corresponding to the set number of cyclic redundancy check intervals and the check area size per cyclic redundancy check interval.

Although the cyclic redundancy check control method according to an embodiment of the present invention has been described above with reference to FIG. 8, it should be understood that the present invention is not limited to the above- Depending on the implementation method, the procedure of each step may be changed, two or more steps may be integrated, or one step may be performed in two or more steps.

9 is a diagram illustrating a client device 110 in accordance with an embodiment of the present invention performing a cyclic redundancy check.

9 is a diagram showing a case where the client apparatus 110 of the user 1 executes the cyclic redundancy check in FIG.

Referring to FIG. 4, the client device 110 of the user 1 transmits a cyclic redundancy check control request to the server 100, and recovers the cyclic redundancy check control information received from the server 100 again.

User 1 has analyzed the number of times of the security inhibiting action (the number of hacking attempts) to be 0, and thus the user security level of the user 1 is set to a low level (LOW) requiring the lowest security level, The cyclic redundancy check level for the user 1 is set to the level 1 (Lv.1) corresponding to the lower level (LOW), which is the user security level of the user 1, and the cyclic redundancy check level is set to the level 1 Lv.1), the cyclic redundancy check type generated by the server 100 is 8, the number of cyclic redundancy check intervals corresponding to level 1 (Lv.1) A check area size of 32K, and a cyclic redundancy check value CRC_V1.

The client device 110 checks the number of cyclic redundancy check intervals (8) included in the cyclic redundancy check control information, the check area size of each cyclic redundancy check interval (32 KB), and the cyclic redundancy check value (CRC_V1).

The client device 110 divides a file of 160 MB into eight sections (one section to eight sections). Thus, the size of each segment is 20 MB.

The client device 110 designates an area corresponding to the first 32 KB as an actual inspection area in each divided section and designates the remaining area corresponding to 19.968 MB as a non-inspection area. If all of the inspection areas to be actually inspected in each of the eight sections are summed up, it is only 256 KB (= 8 * 32 KB).

Therefore, if a full scan of the file is to be performed, 160 MB (= 160,000 KB) must be checked. However, if the file is partially scanned, only 256 KB can be scanned. By performing a partial scan (also referred to as an interval scan or a high-speed scan) rather than a full scan for a user whose entire scan may be unnecessary, that is, a user having reliability in terms of security, unnecessary long scan time is greatly reduced, The satisfaction of the service can be increased.

The method of controlling the cyclic redundancy check according to an embodiment of the present invention as described above can be applied to an application installed in the client device 110 (which is included in a platform that is basically installed in the client device 110, And is also compatible with the operating system of the client device 110 via an application provision server such as an application store server, an application or a web server associated with the service, and the client device 110 (That is, a program) installed directly on the computer. Here, the operating system of the client device 110 may be an operating system such as a window or a Macintosh installed in a general PC such as a desktop, iOS installed in a mobile terminal such as a smart phone or a tablet PC, Android) and other mobile-specific operating systems.

In this regard, the cyclic redundancy check control method according to an embodiment of the present invention is implemented in an application (i.e., a program) installed in the client device 110 or directly installed by a user, Or the like, and the like.

A program implementing the cyclic redundancy check control method according to an embodiment of the present invention transmits a cyclic redundancy check control request to the server 100 and transmits a cyclic redundancy check control request according to the cyclic redundancy check level set corresponding to the client device 110. [ A function of receiving the inspection control information from the server 100 and a function of executing the cyclic redundancy check based on the received cyclic redundancy check control information. In addition, all the functions corresponding to the cyclic redundancy check control method according to the embodiment of the present invention described above with reference to FIGS. 1 to 9 can be performed.

Such a program may be recorded on a recording medium that can be read by a computer and executed by a computer so that the above-described functions can be executed.

In order to execute the cyclic redundancy check control method according to an embodiment of the present invention in which a computer reads a program recorded on a recording medium and is implemented as a program, the above-mentioned program may be read by a processor (CPU) C, C ++, JAVA, machine language, and the like.

The code may include a function code related to a function or the like that defines the functions described above and may include an execution procedure related control code necessary for the processor of the computer to execute the functions described above according to a predetermined procedure.

In addition, such code may further include memory reference related code as to what additional information or media needed to cause the processor of the computer to execute the aforementioned functions should be referenced at any location (address) of the internal or external memory of the computer .

In addition, when a processor of a computer needs to communicate with any other computer or server, etc., to perform the above-described functions, the code may be stored in a computer's communication module (e.g., a wired and / ) May be used to further include communication related codes such as how to communicate with any other computer or server in the remote, and what information or media should be transmitted or received during communication.

The functional program for implementing the present invention and the related code and code segment may be implemented by programmers in the technical field of the present invention in consideration of the system environment of the computer that reads the recording medium and executes the program, Or may be easily modified or modified by the user.

Also, the computer-readable recording medium on which the above-described program is recorded may be distributed to a computer system connected via a network so that computer-readable codes can be stored and executed in a distributed manner. In this case, one or more of the plurality of distributed computers may execute some of the functions presented above and send the results of the execution to one or more of the other distributed computers, The computer may also perform some of the functions described above and provide the results to other distributed computers as well.

As described above, the computer-readable recording medium on which the program for executing the cyclic redundancy check control method according to an embodiment of the present invention is recorded includes a ROM, a RAM, a CD-ROM, a magnetic tape, Floppy disks, and optical media storage devices.

In addition, a computer-readable recording medium storing an application that is a program for executing a cyclic redundancy check control method according to an embodiment of the present invention includes an application store server, an application or a Web server (Such as a hard disk) included in an application provider server (Web server), or the like, or may be an application providing server itself, another computer storing the program or a storage medium thereof have.

A computer that can read a recording medium on which an application, which is a program for executing a cyclic redundancy check control method according to an embodiment of the present invention, includes the above-mentioned client device 110, A mobile terminal such as a smart phone, a tablet PC, a PDA (Personal Digital Assistants), and a mobile communication terminal, as well as a general PC of a mobile communication terminal.

If a computer capable of reading a recording medium storing an application, which is a program for executing the cyclic redundancy check control method according to an embodiment of the present invention, is a smart phone, a tablet PC, a PDA (Personal Digital Assistants) In the case of a mobile terminal, the mobile terminal can download and install the application from an application providing server including an application store server, a web server, and the like. In some cases, after downloading from the application providing server to a general PC, Lt; RTI ID = 0.0 > mobile terminal.

As described above, according to the present invention, it is possible to provide a cyclic redundancy check control method, a server 100, a client device 110, and a recording medium that enable an efficient cyclic redundancy check.

In addition, according to the present invention, a cyclic redundancy check control method, a server (100), a client device (110), and a recording medium are provided.

In addition, according to the present invention, there is an effect of providing a cyclic redundancy check control method, a server 100, a client device 110, and a recording medium, which enable a cyclic redundancy check with high security to be performed.

Further, according to the present invention, it is possible to selectively increase one of the speed of cyclic redundancy check and the improvement of security according to the policy (first method, second method) of the service provider or the behavior of the individual user (third method) A cyclic redundancy check control method, a server 100, a client device 110, and a recording medium.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments. That is, within the scope of the present invention, all of the components may be selectively coupled to one or more of them. In addition, although all of the components may be implemented as one independent hardware, some or all of the components may be selectively combined to perform a part or all of the functions in one or a plurality of hardware. As shown in FIG. The codes and code segments constituting the computer program may be easily deduced by those skilled in the art. Such a computer program can be stored in a computer-readable storage medium, readable and executed by a computer, thereby realizing an embodiment of the present invention. As a storage medium of the computer program, a magnetic recording medium, an optical recording medium, or the like can be included.

It is also to be understood that the terms such as " comprises, "" comprising," or "having ", as used herein, mean that a component can be implanted unless specifically stated to the contrary. But should be construed as including other elements. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Commonly used terms, such as predefined terms, should be interpreted to be consistent with the contextual meanings of the related art, and are not to be construed as ideal or overly formal, unless expressly defined to the contrary.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

Claims (18)

A cyclic redundancy check control request receiver for receiving a cyclic redundancy check control request from a client device; And
Setting a cyclic redundancy check level corresponding to the client apparatus when the cyclic redundancy check control request is received and transmitting cyclic redundancy check control information according to the set cyclic redundancy check level to the client apparatus, And a cyclic redundancy check control unit for controlling cyclic redundancy check. The method according to claim 1,
The cyclic redundancy check control unit,
When the service quality factor is set to the service rate, the cyclic redundancy check level is set to the first level, and when the service quality factor is set to the security level, the cyclic redundancy check level is set to the second level higher than the first level Wherein the server is configured to control the cyclic redundancy check. The method according to claim 1,
The cyclic redundancy check control unit,
Wherein the control unit sets the cyclic redundancy check level corresponding to preset cyclic redundancy check rate information or sets a cyclic redundancy check level corresponding to preset security level information. The method according to claim 1,
The cyclic redundancy check control unit,
Determining whether a cyclic redundancy check type is set based on the set cyclic redundancy check level and transmitting the cyclic redundancy check control information for a full check of the file to the client device according to a determination result, And transmits the cyclic redundancy check control information for the cyclic redundancy check to the client apparatus. 5. The method of claim 4,
Wherein the cyclic redundancy check control information comprises:
And the cyclic redundancy check type indicating information indicating the cyclic redundancy check type. 5. The method of claim 4,
The cyclic redundancy check control unit,
If it is determined that the cyclic redundancy check type is a partial check type,
And transmits the cyclic redundancy check control information including the number of cyclic redundancy check intervals corresponding to the set cyclic redundancy check levels, the check area size for each cyclic redundancy check interval, and the cyclic redundancy check value to the client device. The server that controls the scan. The method according to claim 6,
The cyclic redundancy check control unit,
Wherein the number of the cyclic redundancy check intervals is set to be smaller and the size of the check area for each cyclic redundancy check interval is set to be smaller as the set cyclic redundancy check level is lower,
Wherein the controller sets a larger number of the cyclic redundancy check intervals and sets a larger check area size for each cyclic redundancy check interval as the set cyclic redundancy check level is higher. The method according to claim 1,
Further comprising a service control unit for controlling whether connection to the client apparatus is possible or whether an application can be executed in the client apparatus according to the cyclic redundancy check result in the client apparatus. A method for a server to control cyclic redundancy checking,
Receiving a cyclic redundancy check control request from a client device; And
Setting a cyclic redundancy check level corresponding to the client apparatus when the cyclic redundancy check control request is received and transmitting cyclic redundancy check control information according to the set cyclic redundancy check level to the client apparatus, And controlling the cyclic redundancy check. A method for a client device to control cyclic redundancy checking,
Transmitting a cyclic redundancy check control request to a server; And
When receiving the cyclic redundancy check control information according to the cyclic redundancy check level set corresponding to the client apparatus after transmitting the cyclic redundancy check control request, And executing the cyclic redundancy check control method. 11. The method of claim 10,
Wherein the cyclic redundancy check level
Characterized in that it is set to a first level when the setting of the quality of service factor is the service speed or to a second level which is higher than the first level when the setting of the quality of service factor is secure. Method of inspection control. 11. The method of claim 10,
Wherein the cyclic redundancy check level
Wherein the cyclic redundancy check information is set in correspondence with preset cyclic redundancy check rate information or is set to correspond to preset security level information. 11. The method of claim 10,
Wherein the cyclic redundancy check control information comprises:
And a cyclic redundancy check type indicating information indicating a cyclic redundancy check type determined based on the set cyclic redundancy check level,
Wherein the cyclic redundancy check type is one of a full check type for checking the entire file and a partial check type for checking a portion of the file. 14. The method of claim 13,
Wherein the cyclic redundancy check control information comprises:
A cyclic redundancy check interval corresponding to the set cyclic redundancy check level, a check area size for each cyclic redundancy check interval, and a cyclic redundancy check value when the cyclic redundancy check type is determined to be a partial check type. Duplicate inspection control method. 15. The method of claim 14,
Wherein the number of the cyclic redundancy check intervals and the size of the check area for each cyclic redundancy check interval are set to be smaller as the set cyclic redundancy check level is lower and larger as the set cyclic redundancy check level is higher. Control method. 11. The method of claim 10,
After performing the cyclic redundancy check,
And controlling whether connection to the server or service can be executed according to a result of executing the cyclic redundancy check based on the received cyclic redundancy check control information. A cyclic redundancy check control request transmitter for transmitting a cyclic redundancy check control request to a server; And
When receiving the cyclic redundancy check control information according to the cyclic redundancy check level set corresponding to the client apparatus after transmitting the cyclic redundancy check control request, the cyclic redundancy check based on the received cyclic redundancy check control information And a cyclic redundancy check execution unit that executes the cyclic redundancy check. A recording medium on which a program for causing a client apparatus to execute a cyclic redundancy check control method,
A function of transmitting a cyclic redundancy check control request to a server and receiving cyclic redundancy check control information according to a cyclic redundancy check level set corresponding to the client apparatus,
And a cyclic redundancy check is performed based on the received cyclic redundancy check control information.

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