KR100334384B1 - Public telephone having IC card password verification function and method for controlling of it - Google Patents

Abstract

The present invention uses at least one IC card having a different encryption system provided by an IC card service company for a public telephone, by analyzing the encryption system assigned to each card to perform the appropriate decryption operation, The present invention relates to a public telephone having an IC card cryptographic verification function and to a method of controlling the same.

A feature of the present invention is a public telephone capable of using an IC card provided by at least one service company: an IC card is inserted, electrically connected to a power terminal and a data terminal formed on the IC card to supply driving power to the IC card. A card reader which supplies and simultaneously communicates data with the IC card; At least one decryption module having a different decryption code and a reference result value, the encryption verification unit for verifying the use of the IC card through the encryption analysis program recorded on the IC card, and the verification result of the encryption verification unit A main control unit for controlling overall operation of the public telephone according to the present invention; When the IC card is inserted, the encryption verification unit detects a classification code recorded on the IC card to detect any one decryption module corresponding to the IC card among at least one decryption module mounted in the encryption verification unit. Transmit a decryption code stored in the decryption module of the IC card; The IC card calculates an operation result value by calculating a decryption code transmitted from the encryption verification unit with a previously stored encryption analysis program, and transmits the calculated operation result value to the encryption verification unit; The encryption verification unit compares the operation result value transmitted from the IC card with the previously stored reference result value, and if the comparison result is the same, determines that it is a normal IC card, and controls the main control unit to switch the public telephone to a usable state; If the comparison result is different, it is determined that an abnormal IC card is used, and the main controller is controlled to turn the public telephone into an unusable state.

The present invention can be used in combination with the password verification function for the different types of IC cards provided by at least one IC card service provider, there is an advantage in use.

Description

Public telephone having IC card password verification function and method for controlling of it}

The present invention relates to a public telephone having an IC card encryption verification function and a method of controlling the same, and more particularly, to at least a different encryption system provided by an IC card service company for a public telephone. In using more than one IC card, by analyzing the cipher system assigned to each card and performing the appropriate decryption operation, the IC card cipher can selectively use several types of IC cards with one public telephone. A public telephone having a verification function and a control method thereof.

In general, payment methods that can be used in public telephones are limited to coins and magnetic cards (hereinafter referred to as "MS cards"). However, due to the recent increase in the frequency of use of IC cards, Public payphones are available. Here, the MS card refers to a general public telephone card and a bank credit card, and IC cards are roughly classified into contact IC cards and contactless IC cards using RF methods.

In particular, the IC card can be used in prepaid and post-paid form, where the prepaid type has a balance in the bank account linked to the IC card so that the call charges are automatically withdrawn from the bank account after using a public telephone. In other words, postpaid payment is a method of temporarily charging on a specific settlement date in a similar manner to a credit card even if there is no balance in the bank account linked to the IC card. Accordingly, the system is gradually changing to allow the production and sale of IC cards in banks and other financial fields.

Due to these changes, each IC card service company uses a unique encryption system to prevent illegal use of IC cards. This is to prevent the leakage of the decryption method and other various illegal acts that may occur when using the standardized encryption system.

By the way, according to the conventional IC card for public telephones, the following problem (s) arise.

In other words, the public telephone currently installed and used in the country is configured to use the IC card, but there is no security measures according to the use of the card, or because it restricts the use of only one type of IC card, Either use a duplicate card similar to the existing IC card used in this payphone, or make a device with similar electrical characteristics and signal type as the IC card, insert it into the card connection of the payphone, and then emulate externally. There is a problem that public telephones can be used in an illegal manner if implemented, and when public telephones are set to use IC cards provided by one service provider, only the public telephones operated by each service provider should be used. Discomfort occurs.

Accordingly, the present invention is to solve such a problem (s), the object of the present invention is to enable the use of a password verification function for different types of IC card provided by at least one IC card service provider mixed. A public telephone having an IC card encryption verification function and a control method thereof are provided.

1 is a block diagram showing the configuration of an entire system for implementing a public telephone of an IC card encryption verification function according to the present invention;

2 is a block diagram showing a detailed configuration of a cryptographic verification unit shown in FIG.

3 is an operation flowchart for implementing a control process for a password verification function according to the present invention;

4 is a diagram illustrating a protocol exchanged between the auxiliary control unit and the IC card.

<Description of the code | symbol about the principal part of drawing>

100: card reader 200: password verification unit

210: input / output buffer 220: decryption module

230: power control unit 240: auxiliary control unit

300: main fisherman

A feature of the present invention for achieving such object (s) is in a public telephone capable of using an IC card provided by at least one service provider: an IC card is inserted into a power terminal and a data terminal formed on the IC card. A card reader electrically connected to supply driving power to the IC card and simultaneously communicate data with the IC card; At least one decryption module having a different decryption code and a reference result value, the encryption verification unit for verifying the use of the IC card through the encryption analysis program recorded on the IC card, and the verification result of the encryption verification unit A main control unit for controlling overall operation of the public telephone according to the present invention; When the IC card is inserted, the encryption verification unit detects a classification code recorded on the IC card to detect any one decryption module corresponding to the IC card among at least one decryption module mounted in the encryption verification unit. Transmit a decryption code stored in the decryption module of the IC card; The IC card calculates an operation result value by calculating a decryption code transmitted from the encryption verification unit with a previously stored encryption analysis program, and transmits the calculated operation result value to the encryption verification unit; The encryption verification unit compares the operation result value transmitted from the IC card with the previously stored reference result value, and if the comparison result is the same, determines that it is a normal IC card, and controls the main control unit to switch the public telephone to a usable state; If the comparison result is different, it is determined that an abnormal IC card is used, and the main controller is controlled to turn the public telephone into an unusable state.

Here, the encryption verification unit, the input / output buffer for buffering the communication with the card reader; At least one decryption module for storing a different decryption code and a predetermined reference result value for each service company for verifying the encryption of the IC card; A power control unit for supplying driving power to the IC card; Detect any one of the at least one decryption module corresponding to the IC card using the classification code transmitted from the IC card, and transmit the decryption code stored in the detected one decryption module to the IC card. It simultaneously detects and compares the operation result calculated by the encryption analysis program of the IC card with the reference result stored in any one of the decryption modules, and determines whether the IC card is used, and transmits the determination result to the main control unit. It includes an auxiliary control unit.

The display apparatus may further include a display unit which displays whether the IC card is used by the user.

On the other hand, another feature of the present invention is a public telephone capable of using an IC card provided by at least one service provider: detecting that an IC card is inserted; Initializing the IC card and switching to the operation mode; Detecting the classification code recorded on the IC card to detect the type of the IC card; Selecting any one decryption module corresponding to the IC card among at least one previously installed decryption module; Detect a decryption code from any one decryption module and transmit it to the IC card; Executing a cryptographic analysis program previously stored in the IC card to detect a result value of calculating the decryption code; Comparing the detected result value with a reference result value previously stored in any one decryption module; As a result of the comparison, if the result value and the reference result value are the same, the IC card is determined to be an available card and the public telephone is switched to the operation mode; As a result of the comparison, if the result value and the reference result value are different, the IC card is determined to be an unusable card and the operation mode of the public telephone is forcibly stopped.

The method may further include displaying whether the IC card is used by the user according to the comparison result.

Hereinafter, exemplary embodiment (s) of the present invention will be described in detail with reference to the accompanying drawings. First, in adding reference numerals to the elements of each drawing, it should be noted that the same elements are denoted by the same reference numerals as much as possible even if they are displayed on different drawings. In addition, in the following description there are shown a number of specific details, such as components of the specific circuit, which are provided to help a more comprehensive understanding of the present invention that the present invention may be practiced without these specific details in the art It will be self-evident to those of ordinary knowledge. In describing the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

Figure 1 is a block diagram showing the configuration of the entire system for implementing a public telephone of the IC card encryption verification function according to the present invention, Figure 2 is a block diagram showing the detailed configuration of the encryption verification unit shown in FIG. 3 is an operation flowchart for implementing a control process for a cryptographic verification function according to the present invention.

First, the configuration of the present invention will be described with reference to FIGS. 1 and 2 as follows.

As shown in FIG. 1, the card reader 100 includes an input port into which an IC card is inserted, a power terminal and a data terminal electrically connected to a power contact and a data contact of the IC card, and through the power terminal to the IC card. While supplying the driving power, the decryption code transmitted from the encryption verification unit 200 is provided to the IC card through the data terminal.

The encryption verification unit 200 can communicate with the card reader 100 while providing a decryption code to the card reader 100 and at the same time compare the result value read from the IC card with the stored reference result value to use the card. Verify it. At this time, if a simple numeric code or a character code is stored in the IC card, a person with impure purposes may illegally manufacture and steal an arbitrary card that records the number or letter of the corresponding password. The program is stored, and the resultant is inferred by substituting the decryption code transmitted from the cryptographic verification unit 200 into the corresponding cryptographic analysis program, and the inferred result value and the reference result value preset in the cryptographic verification unit 200. By comparison, it is desirable to determine whether or not the IC card is used.

The main control unit 300 generally controls each component in the public telephone. In particular, the main control unit 300 determines whether the corresponding IC card is used according to the analysis result of the cryptographic verification unit 200, thereby controlling the usable state of the public telephone and at the same time whether the IC card can be used. Mark it for user identification.

On the other hand, with reference to Figure 2 with respect to the detailed configuration of the above-mentioned encryption verification unit 200, the input / output buffer 210 is a variety of information exchanged between the encryption verification unit 200 and the card reader 100 Temporarily buffers the input / output status of the.

Decryption module 220 is a module that stores the decryption code and the resulting value provided by the corresponding IC card service provider, at least provided by at least one service provider according to the installation site of the public telephone or the needs of multiple users At least one decryption module 220 is mounted on the public telephone, and is installed to replace the already installed decryption and new decryption module as necessary.

The power supply control unit 230 supplies a driving power for driving the IC card through the power terminal and simultaneously detects the amount of current flowing through the IC card to control the power supply state to prevent the use of illegal or defective IC cards.

The auxiliary control unit 240 controls the overall operating state of each component block in the encryption verification unit 200.

Referring to Figures 3 and 4 with respect to the operation of the present invention having such a configuration as follows.

When the IC card is initially inserted into the card reader 100 (S1), the card reader 100 notifies the auxiliary control unit 240 through the input / output buffer 210 that the IC card has been inserted (S2). At this time, the auxiliary control unit 240 outputs a power control signal to drive the power control unit 230, whereby driving power is supplied to the IC card inserted into the card reader 100 to operate the IC card. The IC card is initialized by the driving power supplied from the card reader 100 and then switched to the operation mode (S3).

Subsequently, the auxiliary control unit 240 accesses the classification code for determining the type of the IC card inserted into the card connection unit 100 through the input / output buffer 210 to determine the type of the corresponding IC card ( S4). That is, as shown in FIG. 4, the auxiliary control unit 240 reads an ASCII code recorded at a specific memory address of the IC card inserted into the card connection unit 100 through the input / output buffer 210. Use the value to determine the type of IC card. In other words, when the auxiliary control unit 240 sends a command to the IC card, the electronic chip sends out a response signal corresponding to the command and also sends out data indicating the type of the IC card and an end signal END.

In this case, the classification code of the IC card is different from the decryption code of the IC card, and the corresponding IC card among the at least one decryption module 220 mounted in the encryption verification unit 200 before sending out the decryption code. The auxiliary control unit 240 is provided to the auxiliary control unit 240 to select the decryption module 220 corresponding to the service provider provided.

When the type of the corresponding IC card is determined through this process, the auxiliary control unit 240 selects the decryption module 220 corresponding to the service provider that provided the IC card (S5), and the selected corresponding decryption module 220. Decryption code is detected from the transmission through the input / output buffer 210 to the card reader 100. Accordingly, the decryption code is transmitted to the IC card through the card reader 100 (S6).

The IC card executes a predetermined encryption analysis program to detect a result value corresponding to the decryption code transmitted through the card reader 100 (S7). This result is transmitted back to the auxiliary control unit 240. The auxiliary control unit 240 detects the reference result value pre-stored in the decryption module 220 and compares it with the result value transmitted from the IC card (S8). At this time, if the transmitted result value and the reference result value are the same, the auxiliary control unit 240 determines that the IC card is a usable card (S9), and notifies the main control unit 300 of the determination result. The main control unit 300 enables the use of a public telephone by connecting a trunk line when the determination result from the auxiliary control unit 240 is in a normal state (S10).

If the transmitted result value is different from the reference result value, the auxiliary control unit 240 determines that the IC card is an unusable card (S11), and notifies the main control unit 300 of this determination result. In addition, the auxiliary controller 240 outputs a power control signal to the power controller 230 to cut off the power supplied to the card reader 100 to disable the use of the corresponding IC card. The main control unit 300 displays that the corresponding IC card is an unusable card according to the determination result of the auxiliary control unit 240, and then forcibly terminates various functions of the public telephone (S12). Accordingly, the user can visually check whether the corresponding card is used, and use of a bad card and illegal card is prevented.

Here, the power control unit 230 is controlled by the power control signal of the auxiliary control unit 240, there is a current detection function therein the contact (not shown) of the card reader 100 by a defective IC card short circuited When it is short, it is impossible to supply the power, thereby additionally blocking the use of the IC card.

As described above, although the specific embodiment (s) have been described in the detailed description of the present invention, various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiment (s), but should be defined by the claims below and equivalents thereof.

As a result, according to the public telephone having the IC card encryption verification function and the control method according to the present invention, the following advantage (s) occurs.

That is, since the password verification function for different types of IC cards provided by at least one IC card service company can be used in combination, there is an advantage in convenience of use.

Claims (5)

For a public telephone that can use an IC card provided by at least one service provider: A card reader which is inserted with an IC card, electrically connected to a power supply terminal and a data terminal formed on the IC card to supply driving power to the IC card and simultaneously communicate data with the IC card; An encryption verification unit including at least one decryption module having a different decryption code and a reference result value, and verifying the use of the IC card through an encryption analysis program recorded on the IC card; And A main control unit for controlling overall operation of the public telephone according to a verification result of the encryption verification unit; When the IC card is inserted, the cryptographic verification unit detects a classification code recorded on the IC card and indicating a type of the IC card to correspond to the IC card among at least one cryptographic decoding module mounted in the cryptographic verification unit. Detect any one decryption module, and transmit the decryption code stored in the one decryption module to the IC card; The IC card calculates an operation result value by calculating the decryption code transmitted from the encryption verification unit with a previously stored encryption analysis program, and transmits the calculated operation result value to the encryption verification unit; The encryption verification unit compares the operation result value transmitted from the IC card with the previously stored reference result value, and if the comparison result is the same, determines that it is a normal IC card, and controls the main control unit to switch to the available state of the public telephone. To; And determining the abnormal IC card if the comparison result is different, and controlling the main control unit to switch the public telephone into an unusable state. The method of claim 1, wherein the encryption verification unit, An input / output buffer buffering communication with the card reader; At least one decryption module for storing a different decryption code and a predetermined reference result value for each service provider for verifying the encryption of the IC card; A power control unit for supplying driving power to the IC card; Detect any one decryption module corresponding to the IC card among the at least one decryption module using the classification code transmitted from the IC card, and detect the decryption code stored in the detected decryption module. It transmits to the IC card, and simultaneously detects and compares an operation result value calculated by the encryption analysis program of the IC card with a reference result value stored in the one decryption module, and determines whether the IC card can be used. A public telephone having an IC card cryptographic verification function, comprising an auxiliary control section for making a judgment and sending a result of the determination to the main controller. The method of claim 1, A public telephone having an IC card password verification function, further comprising a display unit for displaying whether the user can use the IC card with the naked eye. For a public telephone that can use an IC card provided by at least one service provider: Detecting that the IC card is inserted; Initializing the IC card and switching to an operation mode; Detecting a type of the IC card by detecting a classification code recorded on the IC card; Selecting any one decryption module corresponding to the IC card among at least one previously installed decryption module; Detecting a decryption code from the decryption module and transmitting the decryption code to an IC card; Detecting a result value of calculating the decryption code by executing a cipher analysis program previously stored in the IC card; Comparing the detected result value with a reference result value pre-stored in the one decryption module; If the result is equal to the reference result, determining that the IC card is a usable card and switching the payphone to an operation mode; And If the result value differs from the reference result value, determining that the IC card is an unusable card and forcibly suspending the operation mode of the public telephone. Control method. The method of claim 4, wherein And displaying the use of the IC card so that the user can visually identify the IC card according to the comparison result of the comparing step.