JPH08167011A - IC card system - Google Patents

Abstract

(57) [Abstract] [Purpose] To realize an IC card system with high security. [Structure] The data carrier 10 and the IC card 2
The data carrier 1 is a system in which the necessary information in the IC card and the data carrier is independently transmitted to the host side terminal when the data carrier 1
The information transmission between 0 and the host side terminal 30 is characterized by being performed by a wireless communication means.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an IC card system using an IC card.

[0002]

2. Description of the Related Art I attracting attention as a next-generation card
The C card has a large memory capacity as compared with a card using a conventional magnetic tape and is characterized by high security such that it is difficult to forge or decipher data. However, in the conventional system, all the data from ID information such as the password of one IC card to information for the purpose of use is stored.
Anyone who knew the card password could use it. Therefore, when the IC card is lost and taken by another person, once the password is inferred or decrypted, the means for stopping the use of the IC card has to rely on the network. Therefore, if the IC card is used before the response on the network side, there is no means for preventing unauthorized use, and in that sense, security is not necessarily high.

As a method of improving security, there is a more complicated password that cannot be guessed by others, rather than a password based on a telephone number, birthday, etc., which is easy for an individual to remember. If you do, IC cards will be used. Moreover, the use of a complicated password has resulted in the use of something that is difficult for the person to remember, and has not become a person-friendly system.

On the other hand, I without contact with the card reader
Non-contact type IC cards that can read and write information on C cards have become widespread in recent years. FIG. 5 shows types of non-contact type IC cards and communication distances. The communication distance of the proximity type IC card is 1 mm or less for the capacitive coupling type and 3 mm or less for the electromagnetic coupling type. On the other hand, in the remote type, the mid-wave band wireless type is about 1 m or less, and the microwave band wireless type is approximately 5 m.
~ 6 m or less. By utilizing the characteristics of each of these cards, a hybrid card having the functions of a remote type and a proximity type non-contact type IC card has also been proposed (Japanese Patent Application No. 6-
175264).

FIG. 6 shows, as an example of a hybrid card, an example having functions of a proximity type electromagnetic coupling type and a remote type microwave band wireless type. 50 is a hybrid card, 51 is a circuit unit consisting of a CPU and memory, 52 is a coin type lithium battery, 53 is an antenna for remote type microwave band wireless communication, 54 is a modulation / demodulation circuit for remote communication, and 55 is a proximity type. Coil for electromagnetically coupled communication, 5
Reference numeral 6 is an interface circuit for near field communication. In such a hybrid card 50, near field communication of several mm is possible at the same time as remote communication of several m between the reader / writer (R / W) of the host side terminal and the card.

[0006]

These non-contact type ICs
The security of the card is improved because it is more difficult to decipher the data than a contact type card and the chance of loss is reduced because the card can be used even in a pocket or the like. However, all the information is stored in one card and managed with a password, which is no different from the contact type IC card in terms of safety when the card is lost.

In a system using an IC card capable of storing more data than a magnetic card, the more data stored therein, the greater the damage caused by misuse, and the more secure the card system is. Was strongly desired.

An object of the present invention is to provide a high security which can be used with the same or less procedure as the conventional system without using a difficult password which cannot be guessed by analogy, which is required in the conventional card system. IC to have
To realize a card system.

[0009]

According to the present invention, in order to realize a highly secure IC card system, the information of the cardholder is distributed to a data carrier and an IC card, or is stored only in the data carrier. The main feature of the present invention is that the information required when the card is used is sent from the data carrier by wireless communication between the cards or the host by wireless communication, and the information sent to the card is erased after use.

[0010]

According to the present invention, the information stored in the IC card in the conventional IC card system is stored in the data carrier and the IC card, which cannot be used independently, in a distributed manner, thereby decoding the data of the card and the data carrier. It is possible to increase the safety against. In addition, since the information transmission between the data carrier and the IC card or the host is performed wirelessly, it is not necessary to take out the data carrier at the time of use, so that the chances of losing the data carrier can be reduced. Even if you lose your data carrier, you cannot use the IC card until you have both the data carrier and the IC card.
Extremely high security can be realized against unauthorized use by others. Furthermore, by making the possession of the data carrier a condition for using the IC card, it becomes possible to omit the password when using the card. By combining these actions, an IC card system having high security can be realized without bothering people. Furthermore, if you set a password for use, it is as easy to use as the conventional IC card system.
It goes without saying that a safer system can be realized.

[0011]

1 is a front view showing a first embodiment of the present invention. With two data carriers according to the invention, I
An example of an IC card system for independently transmitting data stored in a C card and a data carrier to a host side terminal will be shown. In these figures, 10 is a data carrier having a remote type medium-wave band wireless communication function, 2
Reference numeral 0 indicates a contact type IC card, and 30 indicates a host side terminal equipped with a contact type R / W and a remote type medium-wave band wireless type R / W.

The data carrier 10 shown in FIG. 1A is a remote type medium-wave band wireless antenna 11, a medium-wave band wireless modulation / demodulation circuit 12, a circuit section 13 including a CPU and a memory, and a coin-type data carrier. A lithium battery 14 is provided.

The IC card 20 shown in FIG. 1B is a circuit section 2 including a contact type electrode terminal 21, a CPU and a memory.
Equipped with 3.

The host side terminal 30 shown in FIG. 1C is a circuit unit 3 including a remote type medium wave band wireless antenna 31, a medium wave band wireless modulation / demodulation circuit 32, a CPU and a memory.
3, remote type medium-wave band radio type R / W 34, contact type R / W 35 including the antenna 31 and the modulation / demodulation circuit 32
It has.

In the embodiment of FIG. 1, the IC cards 20 and 2 are used.
An example is shown in which one data carrier 10 is always carried and an input is made to the host side terminal 30 when used.

The data carrier 10 is a host side terminal 30.
There is no limit to the shape or size of the device as long as it has a function capable of communicating with. In this embodiment, the data carrier 10
The example shows that the medium-wave band radio is used for communication from the host terminal 30 to the host-side terminal 30 and the information transmission from the IC card 20 to the host-side terminal 30 is performed via the contact-type terminal. Even if all types of non-contact communication shown in 1 and communication via the contact-type electrode terminal 21 are performed, the operation procedure at the time of use is changed, but the function as the IC card system is not changed at all.

Next, an operation example will be described with reference to FIG. Data A to E in FIG. 2 are data stored by being dispersed in the IC card 20 and the data carrier 10. If data A, C, and E are required when using the card, Fig. 1 (b)
As shown in FIG. 5, the data A is sent from the IC card 20 to the contact type R / W 35 of the host side terminal 30, and the data C and E are sent from the data carrier 10 to the wireless type R / W 34, respectively. , The data A, C, E are combined into usable information as shown in FIG. The communication between the data carrier 10 and the host-side terminal 30 is automatically performed wirelessly when a user wearing the data carrier 10 approaches the host-side terminal 30. The personal ID information and the password are included in the combined information, and the combination of the IC card 20 and the data carrier 10 corresponds to the password, so that the person does not need to input the password from the key when using the card. In order to further enhance security, it is possible to set a password input for communication between the card and the host side terminal. In this case, a system with higher security can be achieved by the same procedure as the conventional IC card system. . The method of distributing the stored data to the IC card 20 and the data carrier 10 includes, for example, a method of distributing the data according to purposes such as personal ID information and the amount of money, and the upper two digits / lower three digits of the password.
It is possible to use a method suitable for the system, such as a method of dividing one data into several pieces such as the rest, and distributing the data.

In FIG. 3, as another embodiment of the IC card system according to the present invention, one data carrier 10A is used, and after necessary data is once transmitted from the data carrier 10A to the hybrid IC card 20A, the host side terminal 30A. An example of transmission to The data carrier 10A is an antenna 15 for remote type microwave band wireless communication,
A modulation / demodulation circuit 16 for remote communication is provided. The hybrid IC card 20A includes a coil 24 for close proximity type electromagnetic coupling type communication, an antenna 22 for remote type microwave band wireless communication, a modulator / demodulator circuit 25 for remote communication, an interface circuit 26 for close proximity communication and a coin type. A lithium battery 27 is provided. The host side terminal 30A is a proximity type electromagnetically coupled R / W 36 (comprising a proximity type electromagnetically coupled communication coil 37 and a proximity communication interface circuit 38) and a remote type microwave R. / W39 (composed of an antenna 40 for remote type microwave band wireless communication and a modulation / demodulation circuit 41 for remote communication). Reference numeral 33 is a circuit portion, and the CPU therein also serves as a memory erasing means. Similar to the first embodiment, the shape and size of the data carrier 10A is not limited. In addition, microwave band radio is used for communication from the data carrier 10A to the hybrid IC card 20A.
From the hybrid IC card 20A to the host side terminal 30A
Although an example using a proximity type electromagnetic coupling type is shown for communication to, the communication is performed by all types of non-contact communication shown in FIG. 5 or communication via a contact type electrode terminal. The fact that there is no problem in this case is the same as in the first embodiment.

Next, the operation of the second embodiment will be described with reference to FIG. F to H in FIG. 4 are hybrid IC cards 2
The data is distributed and stored in 0A and the data carrier 10A. The person using the system is the host side terminal 30
When approaching in front of A, the information necessary for the system is sent from the host side terminal 30A to the data carrier 10A, and if the data F and G are required when using the card, as shown in FIG. After G has been sent to the hybrid IC card 20A by microwave communication in the microwave band, as shown in FIG. 4C, the data F and G are sent from the IC hybrid card 20A to the R / W 36 of the host side terminal 30A. As shown in FIG. 4D, the host side terminal 30A combines the data F and G with usable information. After all processing is completed, the host side terminal 30A
Is the data carrier 1 on the hybrid IC card 20A.
The data G sent from 0A is erased by the control of the CPU in the circuit unit 33 as shown in FIG. 4 (e). Communication from the data carrier 10A to the hybrid IC card 20A is automatically performed wirelessly. Since the personal ID information and password are included in the combined information, and the combination of the hybrid IC card 20A and the data carrier 10A corresponds to the password, it is not necessary for a person to input the password from the key when using the card. This is the same as in the first embodiment, and it is also the same that the password input can be set for the communication between the card and the host in order to further enhance security. Similar to the first embodiment, the data storage method may be a method of distributing the data to the card and the data carrier, or it is possible to store all the information on the data carrier that is unlikely to be lost without being taken out during use. Incidentally, the data carrier 10, 10A in the present invention
Indicates all items that can be stored and carried, and examples thereof include an IC card, a magnetic card, a floppy disk, a calculator data card, a CDROM, and the like.

[0020]

The IC card system according to the present invention is
In an IC card system including an IC card and at least one data carrier, data is distributed and stored in the data carrier and the IC card, and when the IC card is used, necessary information in the IC card and the data carrier is stored. ICs that independently transmit each to the host side terminal
Since the system is provided with the wireless communication means for wirelessly transmitting information between the data carrier and the host-side terminal, it is possible to realize an IC card system having an extremely high security without remembering a password.

Since the data stored in the data carrier of the IC card is erased after use,
Once again, the data is in a decentralized form, and high security can be maintained.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of an embodiment of an IC card system using two data carriers according to the present invention.

FIG. 2 is an explanatory diagram of an operation example of an embodiment of the IC card system of FIG.

FIG. 3 is a diagram showing a configuration of an embodiment of an IC card system using one data carrier according to the present invention.

4 is an explanatory diagram of an operation example of an embodiment of the IC card system of FIG.

FIG. 5 is a diagram showing a comparison of communication distances of various cards.

FIG. 6 is a diagram showing a configuration of an example of a conventional hybrid card.

[Explanation of symbols]

 Reference Signs List 10 data carrier 10A data carrier 11 remote type antenna for medium-wave band wireless type 12 medium-wave band wireless modulation / demodulation circuit 13 circuit section including CPU and memory 14 coin-type lithium battery 20 IC card 20A hybrid IC card 21 Contact-type electrode terminal 22 Remote type antenna for microwave band wireless 23 Circuit part consisting of CPU, memory, etc. 24 Proximity type electromagnetic coupling type coil 25 Microwave band wireless modulation / demodulation circuit 26 For proximity communication Interface circuit 30 Host side terminal 30A Host side terminal 31 Remote type medium wave wireless antenna 32 Medium wave wireless modulation / demodulation circuit 33 Circuit part consisting of CPU and memory 34 Remote type medium wave band of host terminal Wireless type R / W 35 Contact type R / W of host side terminal 6 Proximity type electromagnetic coupling type R / W of host side terminal 37 Proximity type electromagnetic coupling type communication coil 38 Interface circuit for proximity communication 39 Remote type microwave type R / W 40 Microwave band wireless communication type Antenna 41 Modulation / demodulation circuit for telecommunications

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasuhiro Nagai 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corporation

Claims (2)

[Claims] 1. An IC card system comprising an IC card and at least one data carrier, wherein data is distributed and stored in the data carrier and the IC card, and when the IC card is used, the IC card and the data carrier are stored. Is an IC system for independently transmitting necessary information in a host side terminal to the host side terminal, and is provided with a wireless communication means for wirelessly transmitting information between the data carrier and the host side terminal. system. 2. In an IC card system comprising an IC card and at least one data carrier, a part or all of data is stored in the data carrier,
A system for transmitting necessary information from a data carrier to the IC card by wireless communication before the use of the IC card and storing the information, and then transmitting the information between the IC card and a host-side terminal. An IC card system comprising a memory erasing means for erasing the data stored in the memory card.