KR100426302B1 - Smart card included an usb interface function - Google Patents

Abstract

The present invention relates to a smart card including a USB interface function, wherein an integrated circuit chip in the card includes a memory block for storing an execution program and a plurality of application programs necessary for the execution of the card, and an overall control function for the execution of the card. Performs the signal processing function between the control block to be executed, the interface block for interfacing data with an external device for executing the card, and the control block, the memory block, and the interface block which are physically connected to each other according to the execution program and any application program. A signal processing block, the SCI module performing an interface with a contact external device, a USB module performing a USB interface with a contact external device, and an interface with a contactless external device. RFI module and control each module through internal bus It includes a bus control module that connects the lock physically. The smart card of the present invention improves communication speed and compatibility with peripheral devices, and when using a card connector having a contact terminal and a USB port with a smart card, a smart card does not require a complicated interface device such as a card reader. There is an advantage to communication.

Description

SMART CARD WITH UNIVERSAL SERIAL BUS INTERFACE {SMART CARD INCLUDED AN USB INTERFACE FUNCTION}

The present invention relates to a smart card that includes a universal serial bus (USB) interface function, and more particularly for high speed bus lines and low speed and low power centered around microprocessor and internal bus control logic. It relates to a smart card having a peripheral device bus line structure for connecting the input and output interface module of the, the input and output interface module has a USB interface function to support USB of a personal computer.

In recent years, the use of smart cards as a substitute for various security purposes and currency payment methods is increasing rapidly.

A smart card is an 8-bit or 32-bit microprocessor with its own arithmetic function, an operating system, and an integrated circuit (IC) as a secure storage area. A chip is an electronic card attached to a surface. Also known as IC card, chip card, microprocessor card and CPU card.

Types of smart cards include contact cards, contactless cards, hybrid cards, and combi cards.

A contact card is a card operated by physical contact between the smart card reader and the chip of the smart card.There is a possibility that electric contact or damage may occur due to frequent contact of the contact. It is applied to transaction authentication, digital signature, etc. to be processed.

A contactless card is a card that communicates with a smart card terminal through an antenna by means of radio frequency signals, and does not require physical contact between the card and the reader, and is used for low-speed data such as user recognition and card number transmission and reception.

A hybrid card is a card in which a contact card and a contact card are physically present in a single card, and are inefficient in utilizing hardware resources (independent memory) and software support (there is a separate operating system).

Combi cards are chemically bonded cards that share parts that can be shared by contact cards and contactless cards, and have only one part, which is used for heterogeneous applications (eg chip operating system, same key or password) through internal resource sharing. It is considered to be the most efficient form because it has the advantage of integrating effect.

1 is a chip circuit diagram of a smart card according to the prior art, which is a circuit diagram of a combination card disclosed in Publication No. 2000-0051010 (name of the invention: a credit card system of contact / contactless recognition and / or prepaid / postpaid). .

The card 1 disclosed in the same reference number is designed to include a contact interface module 11 and a contactless interface module 12 in one electronic chip module so that both contact and contactless use can be made, and the contactless interface module 12 includes: A non-contact power supply induction coil 10 is connected to induce a non-contact power supply from the card reader.

The card control unit 18 performs the data through the connection with the ROM 14, the RAM 15, and the DES processing unit 16 when processing the data.

ROM 14 has secured separate files or sectors on the order of 16 or 20 Kbytes, each file being used for a different application. The RAM 15 is about 256 bytes of memory, and the DES processor 16 enables reliable and secure communication and processing even in electromagnetically harsh environments such as buses and subways.

In addition, the card control unit 18 is connected to the EEPROM 17 to store processed data or to read and process stored operating programs. The security processing unit 13 performs security processing and interface management, thereby allowing the card reader to identify the forged or tampered card.

When the card 1 is operated in a contact manner, the data coming through the contactless interface module 12 is not processed by the card controller 18, and at the same time, an anticollision is performed in the card controller 18 so that several cards are not operated at the same time. Adopt the software.

On the other hand, in order to enable communication with a normal personal computer, a separate card reader must be provided, and the communication port of the card reader must be connected to the communication port of the computer main body using a connection cable.

The communication ports of the computer body include serial ports, parallel ports, and USB ports. Among them, the USB port is a plug-and-play interface between a computer and a peripheral device, which is supported by Microsoft's Windows 95 OSR2 and is supported by most Pentium II motherboards. It's a standard that has been offered, but with the release of Windows 98, the port became more interesting because of its stability.

The principle of USB is the same as the serial port, but it is faster and easier to connect than the serial port. USB supports data transfer rates of up to 12 Mbps, so connecting any kind of peripheral is fast enough, connecting up to 127 devices in a chain. It also recognizes when connected while using a PC, and does not require a power supply for peripherals. A PC usually has two USB ports, but it has a USB hub that divides one port into multiple ports, so you can connect various peripherals.

However, since the smart card according to the related art as described above is installed in a personal computer through a serial port, the communication speed is lowered when comparing the USB port with other available peripherals. There was a problem with the computer that could not be installed.

The present invention has been proposed to solve such a conventional problem, and includes a peripheral bus line structure for connecting a high speed bus line formed around a microprocessor and internal bus control logic and an input / output interface module for low speed and low power. In order to improve the communication speed and compatibility of the smart card by providing a smart card having a USB interface function that the input / output interface module supports USB of a personal computer.

The present invention for realizing the above object is a smart card having an integrated circuit chip in a card, the chip comprising: a memory block for storing an execution program and a plurality of application programs necessary for the execution of the card; A control block for performing overall control functions necessary for execution; an interface block for interfacing data with an external device for execution of the card; and a signal processing function between the control block, a memory block, and an interface block physically connected to each other. A signal processing block for performing in accordance with an executing program and any application program; The signal processing block may include an SCI module that interfaces with a contact external device, a USB module that performs a USB interface with the contact external device, a high-speed bus line to which the memory block and a control block are connected, and And a bus control module configured to connect the low-speed bus lines to which the SCI module and the USB module are connected, and a bus control module configured to control the bus by configuring the control block as a master and configuring the modules as slabs.

1 is a block diagram of a chip of a smart card according to the prior art,

2 is a block diagram of a chip of a smart card according to the present invention;

3 is a detailed configuration diagram of the memory block shown in FIG. 2;

4 is a detailed configuration diagram of an embodiment of a signal processing block shown in FIG. 2;

FIG. 5 is a detailed configuration diagram of an embodiment of the interface block shown in FIG. 2;

6 is a connection configuration diagram of a smart card and a card reader according to the present invention,

Figure 7 is a connection diagram of the smart card and the card connector according to the present invention.

<Explanation of symbols for the main parts of the drawings>

202: control block 210: memory block

212: clock generation block 214: signal processing block

216: interface block 2102: SRAM

2104: ROM 2108: EEPROM

2142a, 2142b: Internal bus 2144: Encryption module

2146 random number generation module 2148 bus control module

2150 memory management module 2152 bridge module

2154: timer module 2156: interrupt module

2158: RFI module 2160: SCI module

2162: USB module 2172: RFC interface module

2174 SCI interface module 2176 USB interface module

300: card reader 302: USB port

304: RS232 port 400: card connector

402: USB port

There may be a plurality of embodiments of the present invention. Hereinafter, preferred embodiments will be described in detail with reference to the accompanying drawings. This embodiment allows for a better understanding of the objects, features and advantages of the present invention.

2 is a block diagram of a chip of a smart card according to the present invention, wherein the smart chip of the present invention includes a control block 202, a memory block 210, a clock generation block 212, a signal processing block 214, and an interface block. And 216.

The control block 202 is a microprocessor that performs overall control of the smart card (ie, control of a protocol according to the smart card standard), and is a signal processing block 214 based on a clock provided from the clock generation block 212. ) Control the operation.

The memory block 210 may be configured as an SRAM 2102, a ROM 2104, and an EEPROM 2108, as shown in FIG. 3 as an example. The SRAM 2102 may display contents according to execution of a card. It reads and writes, and the ROM 2104 stores an O / S program of a card, that is, a JAVA COS (Card Operating System), and the EEPROM 2108 stores various smart cards (eg, doors). Application of cards, health cards, bus cards, etc.) is stored. Here, when using a FeRAM (Ferroelectric Random Access Memory) that satisfies the functions of SRAM, ROM, and EEPROM, the memory area becomes smaller and the speed becomes higher.

The signal processing block 214 performs a signal processing function between the control block 202, the memory block 210, and the interface block 216 which are physically connected to each other through an internal bus.

FIG. 4 is a detailed configuration diagram of an embodiment of the signal processing block illustrated in FIG. 2, and includes an encryption module 2144, a random number generation module 2146, and a bus control module physically connected to each other through an internal bus 2142a. 2148, a timer module 2154, an interrupt module 2156, and an RFI that include a memory management module 2150 and a bridge module 2152 and are physically connected to each other via the internal bus 2142b to the bridge module 2152. (radio frequency interface) module 2158, smart card interface (SCI) module 2160, and universal serial bus (USB) module 2162. Here, the internal bus 2142a in the signal processing block 214 having the dual bus structure is a high speed bus line, and the internal bus 2142b is a relatively low speed bus line. Here, the timer module 2154 generates a timing necessary for system control, and the interrupt module 2156 generates an interrupt signal required for system control.

The encryption module 2144 encrypts data by implementing a Rivest Shamir Adleman (RSA), a Data Encryption Standard (3-DES), and an error correction code (ECC) encryption algorithm as a hardware module in consideration of security according to each application. In addition, the random number generation module 2146 generates a random number for mutual authentication with the card reader, and the bus control module 2148 may control the control block of FIG. 2 according to the clock provided from the clock generation block 212 of FIG. 2. 202 and system logical connections.

The bus control module 2148 configures the control block 202 as a master and slab the memory management module 2150, the bridge module 2152, the encryption module 2144, and the random number generation module 2146. Control the bus of the card. In some cases, the control block 202 and the encryption module 2144 may be configured as a master, and the remaining modules may be configured as slabs.

In addition, the memory management module 2150 manages the efficient use of each memory in the memory block 210 shown in FIG. 2, and the bridge module 2152 includes a high speed internal bus 2142a and a low speed internal bus 2142b. By connecting between the input and output interface modules (that is, the RFI module 2158, SCI module 2160, USB module 2162) and performs the function of physically connecting between the other modules.

Meanwhile, the RFI module 2158 is an interface module for a contactless smart card, and is generated in the radio frequency circuit (RFC) interface module 2172 illustrated in FIG. 5 for communication speeds of TX and RX smart cards, which are transmit / receive signals. It accepts a clock and generates a subcarrier on signal (Sub_On) for a protocol of a contactless smart card.

In addition, the SCI module 2160 is an interface module for a contact smart card. TX and RX, which are transmit / receive signals, are directly connected to a contact input / output terminal, and a clock generated from a clock contact terminal, that is, smart Accept the clock used for the card's protocol.

Next, the USB module 2162 provides an interface for communicating with a computer through a separate card reader or card connector. In the case of the card connector, only the contact terminal is physically manufactured and connected to perform communication. To help.

Accordingly, the interface block 216 of FIG. 2 has a configuration as shown in FIG. 5, for example, to correspond to the interface modules 2158, 2160, and 2162 as described above.

That is, referring to FIG. 5, the RFC interface module 2172 in the interface module 216 of FIG. 2 includes an RFC and an antenna to interface contactless communication between the RFI module 2158 and the card reader of FIG. 4, and the SCI interface. The module 2174 interfaces contact communication between the SCI module 2160 and the card reader, and the USB interface module 2176 communicates with a computer connected with the USB module 2162 through a separate card reader or card connector. Interface.

6 is a connection diagram of a smart card and a card reader according to the present invention. As the smart card is inserted into the contact card reader 300, the SCI interface module 2174 of FIG. 5 is signal-connected to the RS232 port 304 through the card reader 300, and the USB interface module of FIG. 5 ( 2176 is signal connected to the USB port 302 via a card reader 300. The card reader 300 is provided with a USB port 302 in addition to the conventional RS232 port 304, which allows a smart card to be installed in a personal computer through the USB port 302, thereby improving communication speed, particularly the USB bus center. Smart cards can also be installed in personal computers designed with I / O lines.

According to an embodiment, a USB connection switch (not shown) may be installed in the card reader 300, and the USB interface module 2176 uses four contact terminals of the smart card. That is, among the eight contact terminals C1 to C8 used by the SCI interface module 2174, C1 (VCC), C5 (GND), C4 (USB DATA), and C8 (USB DATA) are connected. Although not shown in the drawing, this means that the SCI interface module 2174 and the USB interface module 2176 may be integrated into the SCI / USB interface module. In addition, the SCI interface module 2174 and the RFC interface module 2172 may be integrated into a SCI / RFC interface module.

7 is a configuration diagram of the connection between the smart card and the card connector according to the present invention. As the smart card is inserted into the contact card connector 400, the USB interface module 2176 of FIG. 5 is connected to the USB port 402 through the card connector 400. According to an embodiment, the USB interface module 2176 is connected to four contact terminals C1, C5, C4, and C8 of the smart card. The card connector 400 refers to a USB interface connection device made exclusively for USB communication, and communication with a personal computer is achieved by physically making and connecting only a contact terminal without using a complicated interface device such as a card reader. .

On the other hand, although not shown in the above-described preferred embodiment, the smart card chip of the present invention may be equipped with a decryption prevention module that can enhance the security function of the card, through which data generated in the control block, memory block and interface block It can protect your signal from unauthorized hacking.

As described above, the smart card of the present invention has a USB interface function in which an input / output interface module supports USB of a personal computer, thereby improving communication speed and compatibility between the smart card and a peripheral device.

In addition, the use of a card connector having a contact terminal with a smart card and a USB port has the effect of enabling communication with a personal computer without the need for a complicated interface device such as a card reader.

Claims (6)

In a smart card having an integrated circuit chip attached to the card, The chip, An interface for interfacing data with a memory block for storing an execution program and a plurality of application programs necessary for the execution of the card, a control block for performing overall control functions for the execution of the card, and an external device for executing the card. A block and a signal processing block for performing a signal processing function between the control block, the memory block, and the interface block physically connected to each other according to the execution program and any application program; The signal processing block, An SCI module that interfaces with a contact external device, a USB module that performs a universal serial bus (USB) interface with the contact external device, a high-speed bus line to which the memory block and the control block are connected, and the SCI A smart card comprising a bridge module for connecting a low-speed bus line to which a module and a USB module are connected, and a bus control module configured to control the bus by configuring the control block as a master and configuring the modules as a slab. The method of claim 1, wherein the interface block, And an SCI interface module for interfacing data for communication between the SCI module and the external device, and a USB interface module for interfacing data for communication between the USB module and the external device. The method of claim 1, wherein the signal processing block, An RFI module physically connected to the control block via the internal bus by the bus control module to interface with a contactless external device; The interface block, And a RFC interface module for interfacing data for communication between the RFI module and the contactless external device. The method of claim 1, wherein the signal processing block, An RFI module physically connected to the control block via the internal bus by the bus control module to interface with a contactless external device; The interface block, And a SCI / RFC interface module for interfacing data for communication between the SCI module and the external device and communication between the RFI module and the external device. delete delete