JPS6074155A - Data reading system - Google Patents

Abstract

PURPOSE:To hold a secret of an important data recorded in a magnetic medium by providing a means for performing a masking to a read data and storing it in an input buffer, when reading the data in a storage medium such as a magnetic card. CONSTITUTION:In a cash card 1, a data DC is recorded by byte units (B1-Bn). Accordingly, a mask pattern data MK of a memory 2 is also prepared as mask data (m1, m2...) of byte unit. When the cash card 1 is inserted into a reading part 3, the reading part 3 reads the data CD in the cash card CD by each one byte. When a check result is normal, a processing part 5 fetches the mask pattern data m1 by a pointer PM. Subsequently, an operating part 7 executes a masking to the read byte data B1 by the mask pattern data m1, and thereafter, stores an obtained data B1' in an address a1 of an input buffer 8. This store is executed by an address selection using a pointer PI.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a data reading method for reading 7-'-data from a medium such as a magnetic card.

Magnetic cards are widely used as data storage media, and important data such as password codes are stored in the data. For example, in an automated transaction system or POS system at a financial institution, the data of the cash card (magnetic card) presented by the user is
1 read by the reading unit and stored in the input buffer
, Then, the data in this input buffer is sent to the processing section and subjected to necessary processing. However, the data in the input buffer remains 1t until data from the next magnetic card is read. , this data includes important data such as PIN numbers (top secret to third parties).
Therefore, conventional data reading methods have the drawback of not being able to maintain the confidentiality of important data.

(C) Purpose of the invention The present invention has been made to solve the above-mentioned drawbacks.
The purpose is to provide a data reading method that facilitates the confidentiality of input data.

The present invention reads data on a storage medium by a reading unit,
A reading unit for storing read data in a buffer memo IJK, comprising mask pattern data for removing predetermined data in the storage medium, and means for processing the data in the storage medium based on the mask pattern data. , when data of the storage medium is read by the reading unit, the data that is not read is processed based on the mask pattern data, and the processed data is stored in the buffer memory. This is a method that takes F and I'.

As described above, in the present invention, when reading recorded data 1c from a storage medium such as a magnetic card, important data such as a PIN number is masked using a mask pattern prepared in advance. It was a trap designed to prevent it from being stored.

te) Examples of the Invention The present invention will be explained below with reference to the drawings. FIG. 1 is a data block diagram illustrating one embodiment of the present invention. Note that the embodiment is an example of a carry card.

A data CD shown in FIG. 1 (al) is stored in the storage section of the carry card (i.e., data section I). Also, data section D2
has company code B, port number N, and data department D.
9 contains other data d3. In the conventional reading method, all the data collected from the cash card (data 1'; 11DI + D2, etc.) is stored in the input buffer. All methods were adopted.

In the present invention, the mask pattern data MK shown in FIG. 1 (1)) is prepared in advance. The mask data M in FIG. 1 +b+ is the data part of FIG. , - Kamaskudekhari, is the first
The data C shown in FIG.
When reading D, if masking is performed using the mask pattern data MK shown in FIG. 1 (I), the data shown in FIG. Only N) will be stored in the input buffer. Therefore, since important data such as the password A is not stored in the input buffer, its confidentiality can be maintained.

FIG. 2 is a block diagram fully illustrating one embodiment of the present invention. One cash card in Figure 2 is ta+ in Figure 1.
The data CD shown in is recorded in byte units (B, to Bn). Therefore, mask pattern data M in memory 2
K is also prepared as mask data (ml, ml, . . . ) in bytes. In Figure 2, cash card 1
When the card is inserted into the reading section 3, the reading section 3 reads the data CD in the cash card one byte at a time. First, when the first byte data B is read into the register 4, the processing unit 5 performs a check.

The read unit 6 performs a parity check on the read byte data B. When the check result is normal, the processing unit 5
takes out the mask pattern data ml using the pointer PM. Next, the calculation unit 7 performs a masking process on the read byte data B1 using the mask pattern data ml, and then stores the obtained data at address a of the input buffer 8. pointer P
Addresses using I, ml 偻VF-IF and h6 弗
It is assumed that the contents of Gino-Likin T'KL 1/PM are incremented by 1 each time the above processing is performed. In the above masking process, whether the read byte data B and the mask pattern data ml are a logical chord or a logical sum depends on the setting conditions of the mask pattern data MK. Furthermore, the masking process may include arithmetic processing.

Data CD (B, ~Bn) in the above-mentioned Can-Card 1
is stored in the input buffer 8 after being subjected to the above masking process. After the reading is completed, the processing section 5 transfers the data (B+', 82', . . . ) in the input buffer 8 to the 1f-processing section 9. The processing unit 9 starts the processing program 11 in the main memory 10 and reads the data (
B+', B2', etc.).

FIG. 3 is a flowchart showing the procedure of the data reading and masking processing described above.

(fl Effects of the Invention As described above, the present invention provides a masking process for the read data when reading data in a storage medium such as a magnetic card!
Since it has a means to perform ■ and store it in the input buffer,
It has the advantage of keeping important data recorded on the magnetic medium confidential.

[Brief explanation of the drawing]

FIG. 1 is a cheetah block diagram illustrating an embodiment of the present invention, FIG. 2 is a block diagram illustrating an implementation of Kinoi 1+1:l, and FIG. 8i'V3 is a block diagram illustrating an embodiment of the present invention. This is a flowchart for explanation, and the tCJ numbers used in the diagram are as follows. 1 is a cash card, 2-, memory, 3D AC take-up part, 4
is a register, 5.9 is a processing unit, 6 is a check γ;lt
. 7 is the calculation section, 8 is the input cover, F, 10 digit main memo 1 C 11
is the processing program, 8 is the pin code, B,, B2゜Bn
is data in bytes, B+' + r12' i7
1 Masked data, C is company code, CD is data, J) 111) 2. D3 is data part, d+, d3 is data, YariK is mask pattern data, Mt, Ms+
rJ, r112 is mask data, N is account number, PI
, Pr, 4 is a pointer, al+a2 is input J buffer 8
Address 'f'7f<S. Early 12 ((1) DI D2 D3 Bo (b) (Fh Ms (C) 2

Claims (1)

[Claims] A reading device for reading data on a storage medium by a reading unit and storing the read data in a buffer memory, further comprising: means for masking all predetermined data in the storage medium; When data is read, predetermined data of the read data is masked based on the mask data (turn data), and read data including the masked data is stored in the buffer memory. Data reading method.