JPH03166681A - Data card and reader/writer - Google Patents

Abstract

PURPOSE:To prevent the data card from being forged even if whose recorded data is simply copied by providing an identifier at a place other than normal recording data. CONSTITUTION:The additional code identifier 3 is printed at the optional position on the magnetic card 1, e.g. at a left lower position while mixed up with the pattern on the top surface. When the magnetic card 1 is inserted into the head part 5 of the reader writer 4, an identifier reader 8 detects the additional identifier 3 and outputs the pattern of the identifier 3 to a selector 10. The selector 10 switches a switching terminal 11 corresponding to the pattern of the identifier 3, selects and accesses the additional code in a memory 12, and outputs the code to be added to the recording data to a code arithmetic part 13. The pattern of the identifier 3 is not recorded in the selector 10 and when this card is not a regular magnetic card 1, the recording data is not written and the magnetic card 1 is ejected. Consequently, the data card is prevented from being forged.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field J] The present invention relates to a data card such as a magnetic card or an IC card, and a reader/writer for writing and reading data to the data card. [Conventional technology data cards are cash cards and credit cards.
They are frequently used for items such as ID cards, where the stored data is highly confidential, and for important purposes such as forgery or alteration that could lead to serious crimes, and the number of such cards has been increasing in recent years. Conventionally, in order to prevent leakage, forgery, and alteration of recorded data, the recorded data itself was encrypted and recorded. [Problem to be solved by the invention] Copying devices for recorded data and data cards with nothing recorded on them are relatively easily available to anyone, so it is not possible to encrypt recorded data and record it as in the past. It is easy to forge a data card that has just been created by copying the encrypted recorded data onto another card. Additionally, for banks and credit companies that issue data cards in large quantities, it is not possible to easily change the encryption system of recorded data, so there are problems such as a high risk of recorded data being stolen or altered for criminal purposes. was there. The purpose of the present invention is to obtain a data card whose recorded data is less likely to be stolen, forged, or altered, and which is less dangerous. ``Means for Solving the Problems'' The present invention has been made to solve the above problems, and is a data card having an electromagnetic data recording means. , the data card is provided with one or more recording data code identifiers independent of the electromagnetic data recording means. Furthermore, in order to read and write data to this data card, it includes a writer section that writes data input from an input section to the data card, a reader section that reads recorded data from the data card, and recorded data read from this reader section. The reader/writer has an output section that outputs an identifier attached to a data card, an identifier reader section that reads an identifier attached to a data card, an additional code memory that stores many types of additional codes, and an additional code memory that outputs an identifier attached to the data card based on a signal from the identifier. a selector for selecting a specific additional code from the input section; adding the additional code selected by the selector to the data input from the input section; and adding the additional code selected by the selector to the recorded data read from the data card by the reader section; It is equipped with a code calculation section that reduces the additional codes. [Operation] When writing data to a data card, the identifier reader detects the identifier and outputs the pattern of this identifier to the selector, and the selector selects a specific additional code from memory in accordance with the pattern of the identifier. The data is output to the code calculation section, and this additional code is added to the data input from the input section and sent to the writer section, where it is written to the data card as recording data. When reading recorded data from a data card, the identifier reader detects the identifier and outputs the pattern of this identifier to the selector, and the selector selects a specific additional code from memory according to the pattern of the identifier and performs code operation. The additional code is subtracted from the data read from the reader section, which becomes the original data and is sent to the output section. [Example] An example of the present invention will be described based on the drawings. (1) is a magnetic card made of a composite resin plate, and near one side edge of this magnetic card (1) there is a striped magnetic film (2) in the longitudinal direction.
) is printed with magnetic ink. Note that this magnetic film (2) may be formed not in a stripe shape but over the entire surface of the magnetic card (1). An additional code identifier (3) is printed somewhere on the magnetic card (1), for example in the lower left corner, blending in with the picture pattern on the front surface. (4) reading recorded data on the magnetic card (1);
It is a reader/writer that writes data. The head section (5) of this reader/writer (4) includes a reader section (6) for reading the recorded data of the magnetic card (1), a writer section (7) for writing the recorded data, and the additional code identifier (3). An identifier reader (8) for reading is provided. The output of the identifier reader (8) is sent to the selector (10) of the control unit (9).
), and this selector (10) has a switching terminal (1
An additional code memory (l2) is connected via the circuit 1), and the output is connected to a code calculation unit (l3). As shown in FIG. 1, the additional code memory (12) stores many types of additional codes, and by selecting the switching terminal (11), a specific additional code is called up to the selector (10). It is issued. The writer section (7) includes:
The outputs of the data input section (l4) such as a keyboard are connected via the code calculation section (13), and the output of the data input section (l4) such as a keyboard is connected to
is coupled to the output section (15) via the code operation section (13). In the above configuration, magnetic card (1)
This section explains the procedure for writing recorded data to.

Insert the magnetic card (1) into the head section (5) of the reader/writer (4).
), the identifier reader (8) first detects the additional code identifier (3) and outputs the pattern of this identifier (3) to the selector (10). The selector (10) selects a switching terminal (11) corresponding to the pattern of the identifier (3).
, selects and calls the additional code from the memory (12), and outputs the code to be added to the recorded data to the code calculation section (13). Here, if the pattern of the identifier (3) is not registered in the selector (10) and the magnetic card (1) is not a regular magnetic card (1), the magnetic card (1) is ejected without writing the recorded data. ．． On the other hand, from the data input section (l4), the code calculation section (1
The true data code is sent to 3). As shown below,
The exclusive AND of the additional code sent from the selector (10) and this true data code is taken as a recording data code. The recorded data code is sent to the writer section (7) and written on the magnetic film (2) of the magnetic card (1). Next, we will explain the procedure for reading recorded data from the magnetic card (1). Insert the magnetic card (1) into the head section (5) of the reader/writer (4).
), the identifier reader (8) first detects the additional code identifier (3) and outputs the pattern of this identifier (3) to the selector (10). The selector (10) selects a switching terminal (11) corresponding to the pattern of the identifier (3).
, selects and calls the additional code from the memory (12), and outputs the code added to the recorded data to the code calculation section (13). Here, if the pattern of the identifier (3) is not registered in the selector (10) and the magnetic card (1) is not a regular magnetic card (1), the magnetic card (1) is ejected without reading the recorded data. ．． Up to this point, it is almost the same as writing. When it is confirmed that the magnetic card (1) is genuine, the reader section (6) reads the recorded data code from the magnetic film (2) and sends it to the code calculation section (I3). The recording data code is now exclusive ANDed with the additional code as shown below,
It becomes the original true data code and is sent to the output section (15). In the above embodiments, a device for reading and writing recorded data on a magnetic card (1) has been described, but any card-type recording medium such as an IC card may be used, and depending on the format of the recording medium, the writer section ( 7) and leader section (6
) specifications are determined. Further, although the pattern printed on the card (1) is used as the identifier (3), the identifier is not limited to this, and may be a bar code, a punched hole, a notch, etc. Furthermore, it does not have to be an optical type, but any type of identifier (3) that is independent from the magnetic film (2) may be used.
The format of this additional code identifier (3) determines the specifications of the identifier reader (8). [Effects of the Invention] As described above, the present invention provides an identifier in a location other than the normal recorded data, so it is impossible to forge a data card simply by copying the recorded data.
Additionally, since there are many types of additional codes used to encrypt data, they cannot be easily deciphered, so there is little risk of recorded data being stolen or altered. Furthermore, even if some of the additional codes are decoded for criminal purposes, the damage can be kept to a minimum.

[Brief explanation of the drawing]

The drawings are a front view of the data card and a block diagram of the reader/writer. (1)...Magnetic card, (2)...Magnetic film, (3)
...Additional code identifier, (4)...Reader/writer,
(5)...Head part, (6)...Leader part, (7)
...Writer section, (8) ...Identifier reader, (9).
...Control unit, (10)...Selector, (11)...
Switching terminal, ... code calculation section, force section.

Claims (3)

[Claims] (1) A data card having an electromagnetic data recording means, characterized in that it is provided with one or more means of recording data code identifier independent from the electromagnetic data recording means. (2) In a reader/writer having a writer section that writes data input from an input section onto a data card, a reader section that reads recorded data from the data card, and an output section that outputs the recorded data read from the reader section. , an identifier reader unit that reads an identifier attached to a data card, an additional code memory that stores many types of additional codes, and a selector that selects a specific additional code from the additional code memory based on a signal from the identifier. ,
The apparatus further includes a code calculation section that adds an additional code selected by the selector to the data input from the input section and subtracts the additional code selected by the selector from the recorded data read from the data card by the reader section. A reader/writer for data cards. (3) The code calculation unit outputs the exclusive AND of the data input from the input unit and the additional code selected by the selector as write data to the writer unit, and combines the recorded data read from the data card by the reader unit with the above 3. The data card reader/writer according to claim 2, wherein the exclusive AND of the additional codes selected by the selector is outputted as read data to the output section.