KR20020075815A - Electronic Card Key And System And Method For Control Of Entrance And Exit Using it - Google Patents

Abstract

PURPOSE: An electronic card key, and a system and a method for the entrance control using the same are provided to input the door information permitted to each user, to enable the user to set a password, and to decide the accordance of the preset password with the password stored in the electronic card key when passing a lock device. CONSTITUTION: The electronic card key(10) stores the information of the door permitted to the card key user inputted by a system operator and the password set by the user. A door opening/closing device(20) permits the entrance of the electronic card key according to the user information and the password inputted by the user. An entrance detector(30) detects the non-permitted user entered with the permitted user. A rechecking device(40) carries out the recheck procedure for the user entered through the door opening/closing device. A central control device(50) stores the entrance information of the non-permitted user by the entrance detector and the rechecking device. A non-permitted user information input device(60) receives the information of the non-permitted user according to the control of the central control device.

Description

Electronic Card Key And System And Method For Control Of Entrance And Exit Using It}

The present invention relates to an electronic card key and an access control system and method using the same, and more particularly, to a system and method for allowing only authorized persons to access a door using an electronic card kit using radio frequency (RF). .

Door locks in offices, rooms, apartments, and the like, are out of the form of using conventional metal keys. Recently, various technologies have been developed. For example, if a password is entered, the validity of the password can be checked, and the device can be opened through electromechanical operation, or a device that checks the right to open the door by recognizing biometric information such as fingerprint, iris, and voice. Forms of technology are being proposed.

Since various conventional locking devices have their own advantages, users can freely select and use the locking device according to the purpose and location of the locking device.

However, most of these conventional locking devices are simply checking a user's access through a single authentication process.

That is, in the case of a lock device or button type using a metal key, the lock device that is opened and closed by pressing a password is determined by opening or closing the key through a single authentication process. In the case of offices where security is required, various types of electronic card keys (such as all kinds of electronic card keys using radio frequency (RF), fingerprint, iris, voice, etc.) that are being used are only subjected to a single authentication process. Many problems can arise.

In particular, in the case of the lock device using the most of the electronic card key, the information about the user who uses the key is stored in the electronic card key, and the electronic card can be opened and closed by simply reading the electronic card key on the card reader. Anyone who has learned the key has the problem that the door can be opened and closed.

On the other hand, in order to overcome the above problems in the case of using a card reader using an electronic card key, a method of requesting a separate password along with the process of reading the card to the card reader has been used, but this method is inconvenient for users. There is a problem. That is, since the user reads the card in the card reader and inputs the password again, such authentication time may be inconvenient for users who have frequent access.

In addition, the conventional access control system using an electronic card key has a plurality of lock devices in the access control system using an electronic card key, and if the user wants to approve access to the locking device having the permission to use one card. Since the card issuing system modifies the information on the card and transmits the modified information to each lock device wired or wirelessly, the structure is complicated and additional costs for managing the system must be paid. There is a problem.

In addition, in the conventional access control system, when a large number of persons (hereinafter, simply referred to as "unauthorized") accompanied by a user authenticated with one electronic card key enter and exit, no authentication process is performed for the unauthorized person. There is a problem that can not be managed separately, even though the entry and exit without.

The present invention is to solve the above problems, it is possible to input the door information for each user, the password setting input by the user, and the password entered in the predetermined password and the electronic card key when passing the lock device It is an object of the present invention to provide an electronic card key capable of determining whether is matched.

In addition, the present invention is to control the opening and closing of the door using the electronic card key, it is possible to distinguish the unauthorized persons entered without going through the authentication process of the electronic card key through the sensing device can store the access information for the unauthorized person The purpose is to provide an access control system and method thereof.

Figure 1a is an embodiment configuration of an access control system using an electronic card key according to the present invention.

1B is an embodiment configuration diagram of an electronic card key according to the present invention.

1C is an embodiment diagram for information input to an electronic card key in accordance with the present invention.

2 is a flow chart of an embodiment of an access control method using an electronic card key according to the present invention;

Figure 3 is a detailed flowchart of an embodiment of the electronic card key setting method of the access control method using the electronic card key in accordance with the present invention.

4A is a detailed flowchart illustrating an embodiment of a door opening method for an electronic card key user who is allowed to enter a room in an access control method using an electronic card key according to the present invention.

Figure 4b is a detailed flowchart of another embodiment of the door opening method for the electronic card key user allowed entry of the access control method using the electronic card key in accordance with the present invention.

Figure 4c is a detailed flowchart of another embodiment of the door opening method for the electronic card key user allowed entry of the access control method using the electronic card key in accordance with the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1A is a diagram illustrating an embodiment of an access control system using an electronic card key according to the present invention.

As shown in the figure, the access control system using the electronic card key according to the present invention, the system operator can input the information about the door that can be used by the user of the electronic card key, the user can enter the password to the electronic card key E-card key 10 configured to set the, the door opening and closing device 20 for allowing access to the e-card key in accordance with the user information on the e-card key and the password entered by the user, the authenticated user With the entrance detection device 30 for detecting the presence of unauthorized persons entered into the room, the re-validation device 40 for performing the re-confirmation procedure for the user entered through the door opening and closing device, through the access detection device and the re-validation device Determining unauthorized access and storing the unauthorized access information when there is unauthorized access A central control unit 50 and is composed, including unauthorized user information input device 60 for receiving the unauthorized party information according to the control of the central control device.

At this time, the door opening and closing device 20 is a door for opening and closing the door according to the authentication of the electronic card key authentication unit 21 and the electronic card key authentication unit for performing authentication for the electronic card key, as shown in the figure The opening and closing part 22 is comprised.

In addition, the entrance detection device 30 is used to determine the number of people entering and leaving the door, and various sensors (heat detection sensor, light sensor, image sensor, etc.) and devices may be used. It is not necessary to use expensive access detection devices as it is to identify the number of people, but accurate personal information about people.

In addition, the re-validation device 40 is for performing a re-validation procedure for users entered by using the electronic card key, the electronic card key authentication unit 41 for re-authenticating the electronic card key, and the And a control unit 42 for transmitting the authentication information of the electronic card key authentication unit to the central control unit.

In addition, the central control device 50 instructs the unauthorized user information input device to input unauthorized information through the information input through the access detecting device and the reconfirmation device and stores various kinds of control information so as to store the contents. And a storage unit 52 for storing the information under the control of the control unit 51 for transmitting the control information.

In addition, the unauthorized person information input device 60 is for receiving image information for the unauthorized person under the control of the central control apparatus, and various wired / wireless cameras may be used.

In addition, the devices 20 to 60 may transmit information to each other by wire or wirelessly.

Hereinafter, the electronic card key 10 used in the access control system as described above will first be described with reference to FIGS. 1B and 1C, and the access control using the electronic card key will be described next with reference to FIGS. 2 to 4. A system and method thereof will be described.

FIG. 1B is a configuration diagram of an electronic card key according to an embodiment of the present invention, which is a detailed internal configuration diagram of the electronic card key 10 shown in FIG. 1A, and FIG. 1C is information input to an electronic card key according to the present invention. An example diagram for.

As shown in the figure, the electronic card key according to the present invention is an input unit 12 for inputting a password or various user information (number, name, affiliation, access door, application program, control command, etc.), input A storage unit 13 for storing information, an RF management unit 15 for performing contactless RF transmission and reception with the electronic card key authentication unit of the door opening and closing device 20, and a control unit 11 for controlling the information between the respective units And a power supply unit 14 for supplying power to the respective units and the control unit.

At this time, the input unit 12 is for inputting a password and various user information as described above, the operator of the access control system inputs the user information to use the corresponding electronic card key as shown in Figure 1c through the input unit can do. That is, the input unit 12 is for inputting a password and various user information. Various input means including buttons, for example, input means by RF transmission, input means by a barcode, input means by a jack connection, etc. Can be used.

In addition, the power supply unit 14 may use a variety of conventional batteries, as well as use a charging current by the induced current with the electronic card key authentication unit 21 in the door opening and closing device, and also various electronic devices You can also use a charging method (for example, a cell phone).

FIG. 2 is a flowchart illustrating an access control method using an electronic card key according to the present invention, and illustrates an access control method performed in the access control system shown in FIG.

In this case, the method illustrated in FIG. 2 has been described using an electronic card key using a contactless RF transmission / reception method as shown in FIG. 1B as an example, but is not limited thereto. Any card key can be used. That is, the present invention may be used in the case of an electronic card key using fingerprint information such as a fingerprint recognition electronic card key.

First, the operator or user of the access control system sets and registers user information or a password in an electronic card key to be used (100). This will be described in detail with reference to FIG. 3A below.

A user who wants to open or close a door using the set (100) electronic card key enters the same password as the password previously set through the setting process (100). At this time, the electronic card key 10 or the door opening and closing device 20 opens the door to the user only when the input password and the preset password are the same (200). This will be described in detail with reference to FIG. 3B below.

When the user who is allowed to enter through the process 200 enters the entrance, the entrance detecting apparatus 30 detects the number of entering persons and transmits the determined number of persons to the central control apparatus 50 (300).

On the other hand, the door opening and closing device 20 transmits the information on the opening time and the user after opening the door to the rechecking device 40, the control unit 42 of the rechecking device for a predetermined time after the door is opened. If the same authentication process as that of the door opening process 100 is not performed for the user, various warning messages may be output. That is, a warning message may be output by voice, a warning light may be activated, or the door may be automatically closed (300). In addition, when a certain time elapses with the door open, a warning message can be sent to the security office by wire or wireless.

In addition, even when the electronic card key authenticated by the door opening and closing device 20 and the user authenticated through the reconfirmation device 40 are not the same, various warnings as described above may be issued.

The method of using the electronic card key in the reconfirmation process as described above may be the same as the method used in the door opening process 200. In another method, the electronic card key may be used for a while. You can also save it so that users do not have to retype their password.

Also, in the reconfirmation process, the reconfirmation procedure may be performed using only basic user information stored in the electronic card key without skipping the comparison of the password.

When the same electronic card key as the electronic card key certified by the door opening / closing device 20 is authenticated through the rechecking device 40 within a predetermined time after the door is opened, the control unit 42 controls the information on the user. And transmits to 50.

At this time, the central control unit 51 of the central control unit compares the number of occupants transmitted from the entrance and exit device 30 with the number of users transmitted through the reconfirmation device (400), if the number is not the same, the wired / wireless camera By operating the unauthorized information input device 60, such as to monitor the current occupancy situation, and to store the contents in the storage 52 (500).

As another method, the unauthorized person information input device 60 may be continuously operated, but the stored guest situation may be stored in the storage unit 52 only when the unauthorized person entrance information is transmitted as described above ( 500).

In addition, the central control unit 50 may transmit a warning message to an operator or output a warning message to an unauthorized person, and effectively control the unauthorized person by storing various information such as the number of unauthorized persons and entrance time in the storage unit 52. Can be made (500).

On the other hand, the above process is described as an example of the user entering the room, it can be applied even when the user leaves the room.

That is, after the door is opened to the user who has been approved to leave the room through the reconfirmation device, the reconfirmation may be performed through the door opening / closing device 20, and the entrance detection device 30, the reconfirmation device 40, and unauthorized user information input may be performed. By installing the device 60 outside, it is possible to clearly identify the number of people entering and leaving.

In addition, only the electronic card key authenticated through the door opening and closing device 20 and the reconfirmation device 40 may be able to clearly identify the number of persons entering and leaving the door. That is, it is possible to clarify the control of unauthorized persons by allowing the unauthorized persons to go out with the authenticated electronic card key user without authenticating the opening and closing of the exit door. In this case, information about the accompanying users who leave the room may also be stored in the storage unit 52 by being grasped by an unauthorized information input device 60 or the like installed outside.

FIG. 3 is a detailed flowchart illustrating an electronic card key setting method in the access control method using the electronic card key according to the present invention, and shows the electronic card key setting process 100 in detail in the process shown in FIG. 2.

First, before the operator of the access control system distributes the electronic card key to each user, the operator inputs the information about the user and the door code allowed to enter through the input unit 12 of the electronic card key 10. Is stored in the storage 13 (102). In particular, since the operator directly inputs the door code allowed to the user to the electronic card key, there is no need to transmit the authorization information for the user to each door opening and closing device 20 separately.

That is, each door opening and closing device 20 can determine whether to enter the room through the card manufacturing number and access door code, as well as receive other user information (company number, name, affiliation, etc.) to the central control device 50. It can also manage the information about the occupants by transmitting to.

The user who receives the electronic card key from the operator can set a password for the electronic card key through the input unit 12 (button, etc.), and the set password is stored in the storage unit 13 (104).

FIG. 4A is a detailed flowchart illustrating an embodiment of a door opening method for an electronic card key user who is allowed to enter a door in an access control method using an electronic card key according to the present invention. FIG. The door opening process 200 for the key user is shown in detail.

The user who wants to open or close the door using the electronic card key (102, 104) whose user information and password are set (102, 104) first enters the password through the input unit 12 of the electronic card (202), and then the transmission on the electronic card key. The button is clicked (204).

At this time, the controller 11 determines whether the preset registered password 104 and the input password 202 are the same (206).

If the determination result 206 is the same, the control unit 11 transmits the user information shown in FIG. 1C to the electronic card key authentication unit 21 through the RF management unit 15 (208), and the electronic card key authentication unit 21. If the user is allowed to enter the room through the transmitted user information (210), the door is opened (214), and in the case of an unauthorized person, various warnings and the user information are transmitted to the central control device 50 for storage. (212).

That is, it is determined whether the door code for the entrance / exit door of the user information is the code of the corresponding door opening / closing device to open the door in the same case.

In this case, the password inputted to the electronic card key may be stored in the storage unit 13 of the electronic card key only for a predetermined time. That is, when a certain time elapses after the password is input, the information on the input password can be deleted to prevent an illegal user from using the electronic card key, and the password can be stored for a predetermined time to reconfirm the device (40). ) Can be used to perform the authentication procedure without re-entering the password.

If the two passwords do not match, the determination result (206) may be re-enter the password from the user, but at this time limit the number of re-entry, if the number of password errors exceeds the limited number of door opening and closing device 20 It is also possible to send a warning to an illegal user and take a warning action. By setting the use state of the electronic card key to disabled, it can be prevented from being used by an illegal user.

In addition, even when the passwords do not match (206), the information on the password error and the user information are transmitted to the electronic card key authentication unit 21 to output an error message, while the above-mentioned for a predetermined number of times (for example, three times). If the same error message occurs, you may want to take extra warning measures (for example, warning you of fraudulent users and dispatching security guards).

Figure 4b is another detailed embodiment of the door opening method for the electronic card key user allowed entry of the access control method using the electronic card key according to the present invention, the entrance is allowed in the process shown in FIG. The door opening process 200 for the electronic card key user is shown in detail.

The user who wants to open or close the door by using the electronic card key having the user information and password set (104) first enters the password through the input unit 12 of the electronic card (222).

At this time, the controller 11 of the electronic card key determines whether the preset registered password 104 and the input password 222 is the same (224).

If the determination result 224, if the same, the transmission request code is received from the electronic card key authentication unit 21 or the proximity confirmation signal with the electronic card key authentication unit 21 is received (226), The control unit 11 transmits the user information shown in FIG. 1C to the electronic card key authentication unit 21 through the RF management unit 15 (230), the electronic card key authentication unit 21 is transmitted to the user information If the user is allowed to enter the room through 232, the door is opened (236). In the case of unauthorized persons, various warnings and the user information are transmitted to the central control device 50 for storage (234).

In this case, the password inputted to the electronic card key may be stored in the storage unit 13 of the electronic card key only for a predetermined time as described with reference to FIG. 4A.

In addition, even if it is determined that the same password is used, if a certain time elapses without receiving a transmission request code or a proximity confirmation signal, information about the input password is deleted from the storage unit 13 of the electronic card key to be used by an unjust user. The case can be prevented.

If the two passwords do not coincide with the determination result 224, the user may receive re-entry of the password from the user as in the description of FIG. 4A, but the number of password errors exceeds the limited number of times by limiting the number of re-entries. In this case, the user may transmit warning information to the door opening and closing device 20 to perform an illegal user.

Figure 4c is another detailed embodiment of the door opening method for the electronic card key user allowed entry of the access control method using the electronic card key according to the present invention, the entrance is allowed in the process shown in FIG. The door opening process 200 for the electronic card key user is shown in detail.

The user who wants to open or close the door using the electronic card key having the user information and the password set (104) first enters the password through the input unit 12 of the electronic card (252).

When the password is input, the control unit 11 of the electronic card key passes through the RF management unit 15 to the electronic card key authentication unit 21, the user information shown in FIG. 1C, the preset password 104, and the input 252 password. Will be transmitted (254).

At this time, the electronic card key authentication unit 21 determines whether the transmitted preset registered password 104 and the input password 252 is the same (256).

If it is the same as the determination result 256, it is determined whether the user is allowed to enter the room from the transmitted user information (258). The door is opened to the allowed user, and if the user is not allowed, the non-authorization as described with reference to FIGS. The alert and information about the ruler are stored (260).

If it is not the same as the determination result 256 may store the warning and information for the unauthorized person as described above (260).

In the above process, in addition to the method of warning and storing information and notifying the security office, the warning and information storage process 212, 234, and 260 for unauthorized persons may include correct information after the number of times if the warning is continued for a predetermined number of times. Even if it is input, it is possible to prevent an unauthorized user's input by blocking opening and closing of the door.

In addition, when the door is not opened for a predetermined time in the state in which the door opening is approved (214, 236, 262), the door opening approval is withdrawn and the electronic card key confirmation unit 21 You can also initialize the contents.

Meanwhile, the electronic card key shown in FIG. 1B can be used in various fields as well as the access control system and method thereof.

That is, the RF electronic card key 10 according to the present invention is not simply used as a key for opening and closing the door, but by mounting various keypads, a display device (LCD), a mass storage unit and a controller in the key, a calculator, an electronic dictionary, and a game machine. It can also be used as an electronic notebook.

In addition, the door can be used for opening and closing of the door, opening and closing of the garage, opening and closing of the safe and financial settlement means. In case of opening and closing the safe such as bank, it can be opened and closed by using the electronic card key used by the bank employee and the user's two electronic card keys. In this case, the processing device receiving the user information of the two people is inputted. Compare and compare the predetermined information to drive only the opening and closing device may be able to open and close the safe.

The present invention described above is capable of various substitutions, modifications, and changes without departing from the spirit of the present invention for those skilled in the art to which the present invention pertains, and the above-described embodiments and accompanying It is not limited to the drawing.

As described above, the present invention has an excellent effect of preventing an acquirer from using the electronic card key unjustly when the electronic card key is lost by inputting a separate password in addition to the basic information previously input to the electronic card key.

In addition, the present invention is to enter the user's information, especially the information about the door is allowed to enter directly into the electronic card key to use to remove the hassle to transmit the corresponding information to each door opening and closing device when the user information is modified By doing so, it has an excellent effect of reducing operational efficiency and operating cost and facility cost.

In addition, the present invention has an excellent effect that can perform a strict management for the external accessor by storing information on unauthorized persons entered without opening and closing the door through a video camera, etc., in particular, access Through the sensing device, the unauthorized information input device can be driven only when the unauthorized person enters and exits, and the driving cost can be reduced by allowing the relevant information to be stored only when the unauthorized person has entered. .

In addition, by authenticating the user twice before and after entering the room, when the authenticated user does not enter after authentication, there is an excellent effect that the access can be more thoroughly controlled by eliminating the possibility of an unauthorized user entering and leaving the room.

In addition, by granting the right to leave the electronic card key user authenticated at the time of admission, there is an excellent effect that can prevent unauthorized access to unauthorized persons.

Claims (21)

Electronic card key, Input means for receiving at least one of a password, a company number, a name, affiliation, an access permission door code, an application program, and a control command; Storage means for storing the input information; RF management means for performing transmission and reception with the electronic card key authentication means of the door opening and closing means; The preset password stored in the storage means is compared with the password inputted by the user through the input means when the door is opened and closed, and a control signal corresponding thereto is transmitted to the electronic card key authentication means through the RF management means or to the control command. Control means for causing the application program to execute; And An electronic card key comprising power supply means for supplying power required for each of the means. The method of claim 1, The password inputted through the input means is registered and registered by the user, and at least one of the number, name, affiliation, and an access permission door code is input by an operator. The method of claim 1, The power supply means is at least one of using a battery, using a charging current by an induced current of the electronic card key authentication means in the door opening and closing means, or using a charging method through a separate charging device. Using an electronic card key. The method of claim 1, The application program executed by the control means includes at least one of an electronic calculator, an electronic dictionary, a game, and an electronic notebook. The method according to any one of claims 1 to 4, The door opening and closing device is an electronic card key, characterized in that at least any one of a car door, a garage door, a safe door, a door of a building, or a financial settlement means. In the access control system using an electronic card key, Door opening and closing means for allowing access to the electronic card key user according to whether the user information including a preset registered password stored in the electronic card key matches the password input by the user; Access detecting means for detecting the number of unauthorized persons entered with the authenticated user through the door opening and closing means; Reconfirmation means for performing a reconfirmation procedure for a user entered through the door opening and closing means; And Central control means for determining the unauthorized access through the information transmitted from the access detection means and the re-confirmation means to store the unauthorized access information when there is an unauthorized access Access control system using an electronic card key comprising a. The method of claim 6, The electronic card key, the user can receive information about the door that can be used by the operator, access control using the electronic card key, characterized in that the user can set a password for the electronic card key system. The method of claim 6, The reconfirmation means is the same as the electronic card key information input in the reconfirmation procedure by receiving the information on the electronic card key from the door opening / closing means when the door opening / closing means permits entrance to the electronic card key. Access control system using an electronic card key, characterized in that for transmitting whether or not to the central control means. The method according to any one of claims 6 to 8, Unauthorized information input means for receiving image information of an unauthorized person under the control of the central control means and transmitting the image information to the central control means. Access control system using an electronic card key further comprising. The method of claim 9, The central control means, when it is determined that there is an unauthorized person, drives the unauthorized information input means to store information transmitted therefrom, or determines that there is an unauthorized person among information transmitted from the unauthorized information input means which is always driven. Access control system using an electronic card key, characterized in that for storing the information transmitted for a predetermined time from the time point. The method of claim 9, At least one of the door opening / closing means, the rechecking means, and the central control means includes at least one of user entrance, unauthorized entry, unauthorized leave, long opening of the door, non-opening of the door after admission, and non-validation. Access control system using an electronic card key, characterized in that for outputting a warning message in one situation. In the access control method using an electronic card key applied to the access control system, A first step of receiving user information or a password from an operator or user and storing the same in an electronic card key; A second step of receiving a password from a user who wants to open or close the door by using the electronic card key and opening the door if the password is the same as the password stored in the first step; After the door is opened, the third step of re-checking the electronic card key and detecting the number of occupants: and A fourth step of storing information on unauthorized persons when the number of users allowed to enter the room according to the reconfirmation procedure is compared with the number of detected rooms; Access control method using an electronic card key comprising a. The method of claim 12, The first step is, A fifth step of receiving at least one of a user's number, name, affiliation, and an access door code from an operator; And The sixth step of inputting and registering a password from the user Access control method using an electronic card key comprising a. The method of claim 12, The second step, A fifth step of inputting a password through an input unit from a user who wants to open or close a door by using the electronic card key in which the user information and password are set and registered; If a transmission button is clicked after inputting a password, determining whether the preset registered password is the same as the password input through the fifth step and transmitting the user information to the door opening and closing means if the password is identical; And A seventh step of opening the door when the user is allowed to enter the room by analyzing the user information transmitted by the door opening and closing means; Access control method using an electronic card key comprising a. The method of claim 12, The second step, A fifth step of receiving a password through an input means from a user who wants to open or close a door by using the electronic card key in which the user information and the password are set and registered; A sixth step of transmitting the user information to the door opening / closing means when the preset registered password is the same as the password input through the fifth step and the transmission request code or the proximity confirmation signal is received; And A seventh step of opening the door when the user is allowed to enter the room by analyzing the user information transmitted by the door opening and closing means; Access control method using an electronic card key comprising a. The method of claim 12, The second step, A fifth step of receiving a password through an input means from a user who wants to open or close a door by using the electronic card key in which the user information and the password are set and registered; A sixth step of transmitting the user information, a preset registered password and a password input through the fifth step to a door opening and closing means; And A seventh step in which the door opening and closing means opens the door when the preset registered password is the same as the input password and the user information is information of a user who is allowed to access; Access control method using an electronic card key, including The method according to any one of claims 12 to 16, An eighth step of stopping the operation of the electronic card key or outputting a warning message through the door opening / closing means when a number of inputs of a password that does not match a preset registered password is inputted more than a predetermined number of times; Access control method using an electronic card key further comprising. The method according to any one of claims 1 to 16, An eighth step of outputting a warning message when there is a request for exit by the process according to claim 1 or 2 by an electronic card key instead of an electronic card key permitted through the above process; Access control method using an electronic card key further comprising. The method according to any one of claims 1 to 16, Eighth step of performing the process of the second step to the fourth step for the user who wants to leave Access control method using an electronic card key further comprising. The method according to any one of claims 1 to 16, An eighth step of outputting a warning message if the door is not opened for a predetermined time while the door is allowed to be opened by the second step or if the door is left open for a predetermined time after the door is opened; Access control method using an electronic card key further comprising. The method according to any one of claims 1 to 16, The re-checking procedure of the fourth step is performed using the user card transmitted from the door opening and closing means.