JPH1064004A - Magnetic card processor for processing magnetic card and magnetic card processing method, and its magnetic card issuing machine and magnetic card issuing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a magnetic card from forgery and alternation by separating a first information and a second information recorded in a magnetic layer and by extracting the first information separated from the first information and the second information read. SOLUTION: The magnetic card is read with a reading head 18, a reading content is demodulated with a reading circuit 27 and fed to a cryptoanalysis part 28. Also, initial information is read, the reading content is demodulated with the reading circuit 27 and outputted to a main controller 21. Also, a pulse signal is fed from a peak detector 27a with a window outputting part 27c, and the window signal for detecting a differential time is outputted to a N signal extracting part 27d and S signal extracting part 27e after a prescribed time has elapsed. Only a pulse signal with a recording waveform is extracted with the signal N signal extracting part 27d and outputted to the crytoanalysis part 28. Also, only a pulse signal with the recording waveform in a S magnetic body is extracted with the S signal extracting part 27e and outputted to the crytoanalysis part 28. An encipherment key is deciphered with the crytoanalysis part 28.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic card processor and a magnetic card processing method for processing a magnetic card, and a magnetic card issuing machine and a magnetic card issuing method for issuing the magnetic card.

[0002]

2. Description of the Related Art In a magnetic card processing machine for processing magnetic information of a magnetic card used for a station service, a distribution use, etc., there is a strong need to be able to easily and stably process magnetic information. There is a demand for a system that cannot read, decipher, or tamper.

Hitherto, a method has been devised in which a recording magnetic layer is formed into a multilayer structure by using materials having different characteristics of magnetic properties. However, since the characteristics of the magnetic material are not largely changed, they do not have sufficient protection ability. Was.

[0004] What has been devised so far, for example,
A high-holding magnetic material is applied to a card with a two-layer structure of a high-holding material and a low-holding material, and different information is recorded on the high-holding layer (3000 Oe: Oersted) and the low-holding layer (300 Oe). In order to stably record independent information on a low-retention recording magnetic material, the difference in the retaining force is small at present, and there is a disadvantage that mutual interference occurs and rewriting is essentially possible. That is, there is a possibility that the magnetic card is forged or falsified.

[0005]

As described above, the object of the present invention is to eliminate the drawback that the magnetic card may be forged or tampered with, and to process a magnetic card capable of preventing the magnetic card from being forged or tampered with. It is an object of the present invention to provide a magnetic card processing machine and a magnetic card processing method, and a magnetic card issuing machine and a magnetic card issuing method.

[0006]

SUMMARY OF THE INVENTION A magnetic card processor according to the present invention comprises a first magnetic material for holding a record at a high level and a retentive force which is initially set to a low value and which is markedly exposed once to a magnetic field. A magnetic layer comprising a second magnetic material having a characteristic of increasing coercive force; a first portion in which the first information is recorded only in the first magnetic material in the magnetic layer; The first information is recorded on the magnetic material and the second information is recorded on the second magnetic material.
Processing a magnetic card composed of a second portion on which information is recorded, reading the first information recorded on the first portion of the magnetic layer, and reading the first information recorded on the second portion. Reading means for reading the first information and the second information at the same time, and the second means of the magnetic layer read by the reading means.
Separating means for separating the first information and the second information recorded in the portion, and the first information read by the reading means and the first information separated from the second information by the separating means. And extracting means for extracting the information.

[0007] The magnetic card processor of the present invention is characterized in that the first magnetic substance which records and retains the recorded contents at a high level and the retention force is initially set to be low and the retention force becomes extremely high once exposed to a magnetic field. A magnetic layer comprising a second magnetic material having: a first portion in which confidential information is recorded only in the first magnetic material, and a confidential information recorded in the first magnetic material. In processing a magnetic card including a second portion in which concealment information is recorded on a second magnetic body, confidential information recorded in a first portion of the magnetic layer is read, and a second portion is read. Reading means for simultaneously reading the confidential information and the concealed information recorded in the magnetic recording medium, separating means for separating the confidential information and the concealed information recorded in the second portion of the magnetic layer read by the reading means, and Read by the reading means And a extracting means for extracting the confidential information separated from hiding information by the confidential information and the separating means.

[0008] The magnetic card processor of the present invention is characterized in that the first magnetic substance which records and retains the recorded content at a high level and the retaining force is initially set to be low and the retentive force becomes extremely high once exposed to a magnetic field. A magnetic layer comprising a second magnetic material having: a first portion in which confidential information is recorded only in the first magnetic material, and a confidential information recorded in the first magnetic material. A second magnetic body for processing a magnetic card composed of a second part in which encryption information for concealment is recorded; and reading secret information recorded in the first part of the magnetic layer, Reading means for simultaneously reading the confidential information and the concealed encrypted information recorded in the second part,
Separating means for separating the confidential information recorded in the second portion of the magnetic layer read by the reading means from the encrypted information for concealment, concealing information read by the reading means and concealing by the separating means Extracting means for extracting confidential information separated from encrypted information for use, and decrypting means for decrypting the confidential information extracted by the extracting means using the concealment encrypted information separated by the separating means. It is configured.

The magnetic card issuing machine of the present invention is characterized in that the first magnetic substance for recording the recorded contents at a high level, and the holding power is initially set to be low, and the holding power becomes extremely high once exposed to a magnetic field. Processing a magnetic card having a magnetic layer comprising a second magnetic body having: a erasing means for partially DC-erasing the second magnetic body of the magnetic layer based on second information; After partial DC erasure of the second magnetic body by the erasing means, the magnetic layer is composed of recording means for recording first information on the magnetic layer using a magnetic head having a magnetic gap, and the magnetic layer is formed of the first magnetic material. No. 1 only for magnetic materials
And a second portion in which the first information is recorded on the first magnetic material and the second information is recorded on the second magnetic material. Is issued.

[0010] The magnetic card issuing machine of the present invention is characterized in that the first magnetic substance which records and retains the recorded content at a high level and the retention force is initially set to be low and the retention force becomes extremely high once exposed to a magnetic field. Processing means for processing a magnetic card having a magnetic layer made of a second magnetic material having: a erasing means for partially DC-erasing the second magnetic material of the magnetic layer based on concealment information; Means for recording confidential information on the magnetic layer using a magnetic head having a magnetic gap after partial DC erasure of the second magnetic material by the means, wherein the magnetic layer comprises only the first magnetic material. A magnetic card including a first portion in which confidential information is recorded on a first magnetic material and a second portion in which confidential information is recorded on a first magnetic material and concealment information is recorded on a second magnetic material is issued. Things.

The magnetic card issuing machine of the present invention is characterized in that the first magnetic substance which records and retains the recorded content at a high level and the retaining force is initially set to be low and the retentive force becomes extremely high once exposed to a magnetic field. For processing a magnetic card having a magnetic layer composed of a second magnetic material having a magnetic layer, wherein the second magnetic material of the magnetic layer is partially DC-erased based on concealment encryption information. Means, the second by this erasing means
After the partial DC erasure of the magnetic material, recording means for recording confidential information on the magnetic layer using a magnetic head having a magnetic gap is used, and the confidential information is stored only on the first magnetic material. A magnetic card including a first portion recorded and a second portion recorded with confidential information on the first magnetic material and encrypted information for concealment on the second magnetic material is issued. Things.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 and FIG. 2 show a magnetic card coated with a magnetic material such as a commuter pass, a ticket, a prepaid card, etc. used for transportation, distribution and the like. Here, a prepaid card is described as an example of a magnetic card having a price function.

That is, as shown in FIG. 1, the magnetic card 1 is provided with a magnetic layer 3 in which a high retention recording magnetic material and another magnetic material are mixed on a base layer 2. The base layer 2 is made of PET
(Polyethylene terephthalate) or paper.

The magnetic layer 3 has a high holding recording magnetic material made of barium ferrite and a low coercive force initially set by a special treatment, but once exposed to a magnetic field,
S magnetic material having a characteristic of extremely high coercive force (recording with a conventional magnetic head is difficult) {for example, Mn
A material such as Bi (manganese bismuth) magnetic powder, whose coercive force changes greatly between the initial state and after exposure to a magnetic field, is mixed and applied to the base layer 2.

The magnetic layer 3 of the magnetic card 1 has a one-time recording track (issue information track) 4 as shown in FIG.
And read / write track (use track) 5-2
Have two trucks.

At the time of issuance, that is, in the initial state, the one-time recording track (issue information track) 4 is partially erased (application of a magnetic field) by a DC magnetic field as shown in FIG. As a result, as shown in FIG. 3 (b), the S magnetic body 4a has a remarkably high coercive force, cannot be rewritten, and is invalidated, and the high holding recording magnetic body (N magnetic body) 4b has a high holding force. The recorded information is erased, and no information is recorded.

As a result, the S magnetic body 4a partially changes to a remarkably high holding power, and a portion of the S magnetic body 4a that does not change to a high holding power (a part of data encrypted later is recorded). The encryption key as concealment information is recorded according to the length of each of them or the number of pulse signals recorded in each part as described later.

Further, as shown in FIG. 3C,
If the basic issue information of the magnetic card 1 is recorded with high retention for the data encrypted with the encryption key, as shown in FIG. 3D, the retention strength of the S magnetic body 4a changes to a remarkably high retention force. Although the portion that does not contribute to recording, recording is performed on the corresponding high-retention recording magnetic material 4b in the conventional manner, and the portion of the S magnetic material 4a that has not changed to a remarkably high holding force is the corresponding high-retention recording magnetic material 4b. At the same time, data is recorded.

The S magnetic material 4a records contents with extremely high coercive force, and the high-retention recording magnetic material 4b records high-recording contents. The reading is performed on both magnetic materials 4a and 4b. The read recording magnetic flux can be read.

In the one-time recording track 4, once the magnetic field is exposed, the S magnetic body 4a changes to a remarkably high holding force, so that it is impossible to perform recording on the S magnetic body 4a again. The information that is recorded only at the time of issuance of the encryption key or the like (information that is not rewritten once recorded at the time of issuance) is recorded. As a result, rewriting cannot be performed on the S magnetic body 4a of the one-time recording track 4, so that recording that is difficult to falsify can be performed.

Further, on the high holding recording magnetic material 4b of the one-time recording track 4, data obtained by encrypting the basic issue information of the magnetic card 1 with its encryption key is recorded.

The basic issuance information includes information indicating the amount of money to be issued, the issuing organization, and the range of the applicable system, and the issue number as $ D of the card. At the time of issuance, that is, in the initial state, the read / write track (used track) 5 is first erased (application of a magnetic field) by a DC magnetic field, so that the S magnetic body 5a has a remarkably high coercive force and magnetic rewrite. And the high-retention recording magnetic material 5b is erased from the high-retention recording information, and no information is recorded. If further high-holding recording is performed on this, the S magnetic material 5
Although a does not contribute to recording because it has changed to a remarkably high holding force, the high holding recording magnetic material 5b can record, read, and rewrite as before.

A read / write track (use track) 5 is a conventional record for each use (transaction such as consideration),
It is used as a recording area for sequential information such as a balance record (charging information). That is, as information generated for each use, a usage record and balance information such as a usage amount, a code indicating purchased property information, a date and time of processing, a processed place, and a balance are recorded. This track is a track that must be rewritten because recording and reading are repeated each time it is used.

As described above, the magnetic card 1 having the same magnetic material structure can be switched to a use having a different property by the first processing, thereby preventing tampering.

FIG. 4 is a sectional view showing the structure of the main part of the magnetic card issuing machine. That is, a stacker 12 in which a plurality of magnetic cards 1 before issuance are stored is provided on the left side of the main body 11 in the figure. The magnetic cards 1 of the stacker 12 are taken out one by one by a take-out roller 13 and are conveyed by a conveyance path 14. The transport path 14 includes a transport roller 15 for transporting the magnetic card 1,
... are provided. In the transport path 14, write heads 16 and 17 for recording information on the magnetic card 1 taken out by the take-out roller 13 or erasing by a DC magnetic field, and a read head for reading information recorded on the magnetic card 1 are provided. 18 are provided sequentially. The magnetic card 1 read by the reading head 18 is issued from an issuing port 19 provided at the end of the transport path 14.

The magnetic card 1 is moved in the transport direction a shown in FIG.
Is transported on the transport path 14. The write heads 16 and 17 and the read head 18 are each constituted by a head having a magnetic gap.

The write heads 16 and 17 can separately record on the one-time recording track 4 and the read / write track 5. The read head 18 can separately read the one-time recording track 4 and the read / write track 5.

FIG. 5 is a block diagram showing a configuration of a control circuit of the magnetic card issuing machine. That is, the control unit 21
It controls the entire magnetic card issuing machine. The control unit 21 includes an operation panel 22 for inputting issuance contents and the like,
The transport mechanism 2 including the take-out roller 13 and the transport rollers 15,.
3, a driver 25 for driving the write head 16, a driver 2 for driving the write head 17,
6. The content read by the read head 18 is, for example, MFM
A reading circuit 27 for demodulating by inverse conversion of modulation and a decryption unit 28 for decrypting the code are connected.

The control unit 21 transmits the write data to the write heads 16 and 17 to, for example, M
After performing the FM modulation, the data is supplied to the drivers 25 and 26. This modulation circuit includes drivers 25, 2
6, or may be provided between the drivers 25 and 26 and the control unit 21.

The reading circuit 27 includes a peak detector 27a,
It is provided with a window signal output unit 27b, a delay circuit 27c, an N signal extraction unit 27d, and an S signal extraction unit 27e, and extracts an encryption key recorded on the one-time recording track 4 and issues it. It extracts data whose information is encrypted.

The peak detector 27a is connected to the read head 1
8 detects a peak of the read signal and outputs a pulse signal corresponding to the peak.
As shown in (e) of FIG.
A peak is detected from a waveform obtained from a portion where a signal can be read from both the magnetic material 4a and the high holding recording magnetic material 4b and a portion where a signal can be read only from the high holding recording magnetic material 4b.
A pulse signal corresponding to the peak is output.

In the portion where signals can be read from both the S magnetic body 4a and the high holding recording magnetic body 4b, the read signal from the reading head 18 is, as shown in FIG. 4b and the difference time T0
, The sum of the magnetic flux with the signal waveform (S) by the S magnetic body 4a is output.

The difference time T0 is related to the value of the transport speed for transporting the magnetic card 1, as shown in FIG. The condition regarding the difference time T0 is as follows:
5BPI (bit per inch), recording modulation method: F
2F, recording head: 2.4 mm track width, gap width 60 μm, recording current 1A _0-P , reproducing head: 1 mm
The track width and the gap width are 40 μm.

By detecting the peak of the read signal from the read head 18 with the peak detector 27a, as shown in FIG. 6B, the difference between the pulse signal from the high-holding recording magnetic material 4b and this pulse signal is obtained. A pulse signal from the S magnetic body 4a is output with a delay of time T0 (with polarity check). The pulse signal output from the peak detector 27a is supplied to a window signal output unit 27b and a delay circuit 27c.

As shown in FIG. 6C, the window signal output section 27b outputs a window signal for detecting a differential time having a time width T2 after a time T1 after the pulse signal is supplied from the peak detector 27a. Is what you do. The window signal from the window signal output unit 27b is supplied to an N signal extraction unit 27d and an S signal extraction unit 27e.

The delay circuit 27c delays the pulse signal from the peak detector 27a by the processing time of the window signal output unit 27b. The pulse signal from the delay circuit 27c is supplied to an N signal extraction unit 27d and an S signal extraction unit 27e.
Supplied to

The N signal extraction unit 27d inhibits the pulse signal from the delay circuit 27c with the window signal from the window signal output unit 27b, thereby obtaining the signal shown in FIG.
As shown in (d), only the pulse signal (N signal) based on the recording waveform on the high-holding recording magnetic material 4b is extracted.

As shown in FIG. 6E, the S signal extracting section 27e takes the AND of the pulse signal from the delay circuit 27c and the window signal from the window signal output section 27b, thereby obtaining the S magnetic body 4a. Only the pulse signal (S signal) based on the recording waveform is extracted, and this signal is also used as a detection signal of the S magnetic body 4a.

The pulse signal based on the recording waveform on the high holding recording magnetic material 4b from the N signal extracting unit 27d and the S signal extracting unit 2
The pulse signal from 7e with the recording waveform on the S magnetic body 4a is output to the decryption unit 28 via a demodulation unit (not shown).

The decryption unit 28 decrypts the encryption key based on the pulse signal from the S signal extraction unit 27e, and converts the encrypted data from the N signal extraction unit 27d based on the encryption key. The decryption is performed, and issuance information as confidential information is output to the control unit 21 as a decryption result.

Based on the pulse signal from the S signal extracting unit 27e, the decryption unit 28, as shown in FIG. 3F, the S magnetic body 4a and the high holding recording magnetic body 4b of the one-time recording track 4. Where signals can be read from both (x,
y, z), and the encryption key K is decrypted based on the length of each portion or the number of pulse signals based on the recording waveform on the S magnetic body 4a for each portion.

For example, they are connected by a function represented by K = F (x, y, z). Next, the issuing process of the magnetic card 1 will be described with reference to a flowchart shown in FIG.

That is, the user designates the amount of money to be issued, the issuing organization, the range of the applicable system, and the issue number as the conditions for issuing the card by using the operation panel 22, and inputs a start key (not shown) (ST1).

Then, the control unit 21 drives the transport mechanism 23 by the driver 24 to thereby control the take-out roller 13.
And the transport rollers 15,... As a result, the magnetic card 1 stored in the stacker 12 is taken out by the take-out roller 13 and is carried by the carrying path 14 (S
T2).

Next, the control unit 21 controls the DC erase signal for each predetermined section corresponding to the encryption key as concealment information for the one-time recording track 4 (see FIG. 3A).
Then, a DC erase signal for the entire read / write track 5 is supplied to the write head 16 via the driver 25 (ST3). The encryption key may be changed randomly.

As a result, a DC erasing magnetic field is applied to the one-time recording track 4 by the write head 16 at predetermined intervals, and the data is partially erased (see FIG. 3B). Is applied with a DC erasing magnetic field to erase the data (ST4).

As a result, the S of the one-time recording track 4
The magnetic material 4a partially becomes in an erased state with extremely high coercive force, and the entire S magnetic material 5a of the read / write track 5
Becomes an erasure state with a remarkably high coercive force.

At this time, the control unit 21 stores the basic issue information in an internal memory (not shown). Next, the control unit 21 transmits information indicating the amount of money, the issuing institution, and the range of the applicable system in issuance as basic issuance information corresponding to the issuance condition of the card designated by the operation panel 22, and the issue number as the $ D of the card. The encoding information obtained by MFM-modulating the data encrypted by the encryption key (see FIG. 3C) and the encoding information of the format data as the information as the initial value are supplied to the writing head 17 via the driver 26 ( ST5).

As a result, information indicating the amount of money, the issuing organization, and the range of the applicable system in the issuance as the basic issuance information by the write head 17 on the one-time recording track 4, and the data with the issuance number encrypted as $ D of the card are stored. Be recorded. At this time, as shown in FIG. 3D, in the portion of the high-holding recording magnetic body 4b in which the S magnetic body 4a is in the erased state, the data is recorded as it is on only the high-holding recording magnetic body 4b. In the portion where the S magnetic body 4a is not in the erased state, the data is simultaneously recorded on the S magnetic body 4a and the high holding recording magnetic body 4b, and the read / write track 5 is read.
, Information of an initial value, for example, format data is recorded (ST6).

As a result, S of the one-time recording track 4
The magnetic body 4a is composed of a part which is erased with extremely high holding power and a part where a part of the data in which the basic issue information is encrypted is recorded. Encrypted data is recorded, the S magnetic body 5a of the read / write track 5 is in an erasing state with extremely high coercive force, and format data is recorded on the high holding recording magnetic body 5b.

Further, reading of the magnetic card 1 is performed by the reading head 18. That is, a part of the encrypted basic issuance information as an encryption key recorded on the S magnetic body 4a of the one-time recording track 4 and the basic issuance information recorded on the high-holding recording magnetic body 4b are The encrypted data is read, and the read contents are demodulated by the reading circuit 27 and supplied to the decryption unit 28.
The initial information recorded on the read / write track 5 is read, and the read contents are demodulated by the reading circuit 27 and output to the main control section 21 (ST7).

That is, the peak of the read signal by the read head 18 is detected by the peak detector 27a, and as a pulse signal corresponding to the peak, for example, as shown in FIG. A peak is detected from a waveform obtained from a portion where a signal can be read from both the S magnetic material 4a and the high-holding recording magnetic material 4b and a portion from which a signal can be read only from the high-holding recording magnetic material 4b. The resulting pulse signal is output to the window signal output unit 27b and the delay circuit 27c.

That is, in a portion where signals can be read from both the S magnetic body 4a and the high holding recording magnetic body 4b, the reading signal from the reading head 18 is read as shown in FIG. The sum of the magnetic fluxes of the signal waveform by the body 4b and the signal waveform by the S magnetic body 4a is output with a delay of the difference time T0. The peak of this signal is detected by a peak detector 27a.
As a result, as shown in FIG. 6B, a pulse signal from the high-holding recording magnetic material 4b and a pulse signal from the S-magnetic material 4a with a delay of a difference time T0 from this pulse signal are output.

FIG. 6 shows the window signal output section 27b.
As shown in (c), after a time T1 from the supply of the pulse signal from the peak detector 27a, the window signal for detecting the differential time of the time width T2 is changed to the N signal extracting unit 27d, S
The signal is output to the signal extraction unit 27e.

The N signal extracting unit 27d inhibits the pulse signal supplied from the peak detector 27a via the delay circuit 27c with the window signal from the window signal output unit 27b to thereby inhibit the high-retention recording magnetic material 4b. Only the pulse signal of the recording waveform is extracted and output to the decryption unit 28 via the demodulation unit (not shown).

The S signal extracting unit 27e takes the AND of the pulse signal supplied from the peak detector 27a via the delay circuit 27c and the window signal from the window signal output unit 27b, thereby obtaining the AND signal at the S magnetic body 4a. Only the pulse signal of the recording waveform is extracted and output to the decryption unit 28 via the demodulation unit (not shown).

As a result, the decryption unit 28 decrypts the encryption key based on the pulse signal from the S signal extraction unit 27e, and based on the encryption key, the N signal extraction unit 27d.
Decrypts the encrypted data, and outputs to the control unit 21 issuance information as confidential information as a decryption result (ST8).

That is, the decryption unit 28, based on the pulse signal from the S signal extraction unit 27e, as shown in FIG.
And the portions (x, y, z) from which signals can be read from both the high-retention recording magnetic material 4b and the length of each portion or the number of pulse signals based on the recording waveform of the S magnetic material 4a for each portion. Decrypt the encryption key K.

For example, they are connected by a function represented by K = F (x, y, z). Thereby, the control unit 21
Compares the issue information as the read content from the one-time recording track 4 with the recorded issue information, and determines whether the format data is correctly recorded based on the read content from the read / write track 5. Then, the validity of the magnetic card 1 is confirmed (ST9).

As a result, when the validity of the magnetic card 1 is confirmed, the control unit 21 guides the issuance of a correct card through the operation panel 22 and issues the magnetic card 1 from the issuing port 19 (ST10). .

If the validity of the magnetic card 1 is not confirmed in step 58, the control unit 21 guides the card issuing abnormality through the operation panel 22 and ejects the magnetic card 1 from the issuing port 19. (ST11).

Further, the magnetic card 1 in which the issue is abnormal
May be collected in a collection box (not shown). FIG. 9 is a cross-sectional view showing a configuration of a main part of the magnetic card processing machine.

That is, an insertion slot 32 into which the magnetic card 1 is inserted is provided on the right side of the main body 31 in the drawing.
The magnetic card 1 inserted into the insertion slot 32 is transported on a transport path 34 by transport rollers 33,. The magnetic card 1 taken into the main body 31 is transported on the transport path 34 by the reverse rotation of the transport rollers 33,... And is discharged from the insertion slot 32.
The transport path 34 is provided with a read head 35 for reading information on the magnetic card 1 and a write head 36 for recording information on the magnetic card 1. The read head 35 is inserted into the insertion port 32.
To read information from the magnetic card 1 inserted by
The recorded information is read from the magnetic card 1 on which the information is recorded by the write head 36. The write head 36 is for recording information on the magnetic card 1 to be conveyed.

The magnetic card 1 is moved in the transport direction b shown in FIG.
Thus, the sheet is conveyed on the conveying path 34. The write head 36 can separately apply a recording or erasing magnetic field to the one-time recording track 4 and the read / write track 5.

The read head 35 can read the one-time recording track 4 and the read / write track 5 separately. Read head 35, write head 36
Are constituted by heads each having a magnetic gap.

FIG. 10 is a block diagram showing a configuration of a control circuit of the magnetic card processor. That is, the control unit 41
Controls the entire magnetic card processing machine. The control unit 41 includes an operation panel 4 for inputting processing contents and the like.
2. a driver 44 for driving the transport mechanism 43 by the transport rollers 33,..., A reading circuit 45 for demodulating the content read by the read head 35 by, for example, inverse conversion of MFM modulation.
A driver 46 for driving the write head 36 and a decryption unit 47 for decrypting the code are connected.

The reading circuit 45 includes a peak detector 45a,
A window signal output unit 45b, a delay circuit 45c, an N signal extraction unit 45d, and an S signal extraction unit 45e are provided, and have the same configuration as the reading circuit 27.

The decryption unit 47 decrypts the encryption key based on the pulse signal from the S signal extraction unit 45e, and converts the encrypted data from the N signal extraction unit 45d based on the encryption key. The decryption is performed, and issuance information as confidential information is output to the control unit 21 as a decryption result.

Next, a process of using the magnetic card 1 issued by the issuing process will be described with reference to a flowchart shown in FIG. That is, when the insertion of the magnetic card 1 from the insertion slot 32 is detected by a detector (not shown) (ST21), the control unit 41 drives the transport mechanism 43 by the driver 44, so that the transport rollers 33,.
Is rotated in the forward direction. Thereby, the magnetic card 1 inserted from the insertion slot 32 is transported by the transport path 34 (ST22).

Next, reading of the magnetic card 1 is performed by the reading head 35. That is, a part of the encrypted basic issuance information as an encryption key recorded on the S magnetic body 4a of the one-time recording track 4 and the basic issuance information recorded on the high-holding recording magnetic body 4b are The encrypted data is read, and the read contents are demodulated by the reading circuit 45 and supplied to the decryption unit 47.
Further, the initial information recorded on the read / write track 5 is read, and the read contents are demodulated by the reading circuit 45 and output to the main control section 21 (ST23).

That is, the peak of the read signal by the read head 18 is detected by the peak detector 45a, and as a pulse signal corresponding to the peak, for example, as shown in FIG. A peak is detected from a waveform obtained from a portion where a signal can be read from both the S magnetic material 4a and the high-holding recording magnetic material 4b and a portion from which a signal can be read only from the high-holding recording magnetic material 4b. The resulting pulse signal is output to the window signal output unit 45b and the delay circuit 45c.

That is, in a portion where a signal can be read from both the S magnetic body 4a and the high holding recording magnetic body 4b, a reading signal from the reading head 18 is read as shown in FIG. The sum of the magnetic fluxes of the signal waveform by the body 4b and the signal waveform by the S magnetic body 4a is output with a delay of the difference time T0. The peak of this signal is detected by a peak detector 45a.
As a result, as shown in FIG. 6B, a pulse signal from the high-holding recording magnetic material 4b and a pulse signal from the S-magnetic material 4a with a delay of a difference time T0 from this pulse signal are output.

FIG. 6 shows a window signal output section 45b.
(C), after a time T1 from the supply of the pulse signal from the peak detector 45a, the window signal for detecting the differential time of the time width T2 is changed to the N signal extraction unit 45d and the S signal extraction unit 45d.
The signal is output to the signal extraction unit 45e.

The pulse signal supplied from the peak detector 45a via the delay circuit 45c is inhibited by the N signal extracting unit 45d by the window signal from the window signal output unit 45b, so that the N signal extracting unit 45d detects the pulse signal from the high-holding recording magnetic material 4b. Only the pulse signal of the recording waveform is extracted and output to the decryption unit 47 via a demodulation unit (not shown).

The S signal extractor 45e performs an AND operation between the pulse signal supplied from the peak detector 45a via the delay circuit 45c and the window signal from the window signal output unit 45b, so that the S magnetic body 4a performs the AND operation. Only the pulse signal of the recording waveform is extracted and output to the decryption unit 47 via a demodulation unit (not shown).

As a result, the decryption section 47 decrypts the encryption key based on the pulse signal from the S signal extraction section 45e, and based on the encryption key, the N signal extraction section 45d.
And decrypts the encrypted data, and outputs the issuance information as secret information to the control unit 21 as a decryption result (ST24).

In step 23, the actual usage such as the balance recorded on the high-holding recording magnetic material 5b of the read / write track 5 is read, and the read contents are demodulated by the reading circuit 45 for control. It is supplied to the unit 41.

The control unit 41 determines the validity of the decrypted basic issuance information (ST25). If it is determined to be valid, the control unit 41 calculates the remaining amount as a new usage record by subtracting the fee for the current processing from the remaining amount (ST25). ST26). At this time, the fee for the current process is specified by the operation panel 42, for example.

Next, the control section 41 supplies the remaining encoding information as a new use record to the writing head 36 via the driver 46 (ST27). Thus, the remaining amount as a new usage record is recorded on the read / write track 5 by the write head 36 (ST28).

Thereafter, the control unit 41 drives the transport mechanism 43 by the driver 44, thereby
3, ... are rotated in the opposite direction. Thereby, the write head 3
The magnetic card 1 on which the writing has been performed by 6 is conveyed to the insertion slot 32 side by the conveying path 34 (ST29).

Next, the read / write track 5 is read by the read head 35, and the read content of the read / write track 5 is demodulated by the read circuit 45 and supplied to the control unit 41 (ST30).

Thus, the control section 41 judges the validity of the magnetic card 1 by matching the read contents of the read / write track 5 with the recorded new use record (ST3).
1) The normal process is guided by the operation panel 42, and the magnetic card 1 is ejected from the insertion slot 32 (ST).
32).

If the validity of the magnetic card 1 is not determined in step 31, the control unit 41 informs the operation panel 22 that the accepted magnetic card 1 is an abnormal ticket, Is discharged from the insertion port 32 (ST33).

The control unit 41 also includes an S signal extraction unit 45e
Depending on whether or not a pulse signal is obtained from the S magnetic body 4
It is possible to judge whether the data recorded in a is valid or not, and it is possible to prevent falsification and forgery.

As described above, in the case where the one-time recording track is composed of a mixture of two types of the S magnetic material and the high holding recording magnetic material or has a two-layer structure, the S magnetic material 4a of the one-time recording track 4 has An encryption key determined by a portion that has been erased with extremely high holding power and a portion in which a part of the data in which the basic issuance information has been encrypted is recorded is recorded. Data obtained by encrypting the basic issuance information with the encryption key is recorded. At the time of processing, a pulse signal for each S magnetic body portion of the one-time recording track and a pulse signal from the high holding recording magnetic body are extracted. The encryption key is decrypted according to the length of each portion divided by the pulse signal from the S magnetic body or the number of pulse signals, and the pulse signal from the high holding recording magnetic body is obtained. The data of being encrypted is obtained so as to decrypt the issuing information using the encryption key. Thus, falsification and forgery are prevented.

Further, the encryption key can be changed for each card, so that a high degree of tampering and forgery can be prevented. In the above embodiment, in the magnetic card, the high-retention recording magnetic material and the S
Although the case where the magnetic layer formed by mixing the magnetic material is applied is described, the present invention is not limited to this, and two layers of the high-retention recording magnetic material and the S magnetic material are provided over the entire surface of the magnetic card on the base layer. It may be configured to be applied in a structure.

In this case, the issuing process shown in FIG.
Can be similarly performed. Further, data is partially recorded on the S magnetic body and the high holding recording magnetic body of the one-time recording track, and a signal waveform by the high holding recording magnetic body as a read signal and a signal waveform by the S magnetic body with a delay of the difference time A case has been described in which the sum of the magnetic fluxes is output and the peak values of the signal waveforms are the same. However, the present invention is not limited to this, and a difference may be set between the peak values of the read voltages of the two signal waveforms. . That is, a difference is made between the residual magnetic flux of the S magnetic material and the residual magnetic flux of the high-retention recording magnetic material, thereby giving a uniqueness. In this case, by taking into account the difference between the peak values of the read voltage, advanced tampering,
Forgery prevention can be achieved.

In this case, the two read voltages of the N signal and the S signal are compared by the peak values obtained by converting the two read voltages by the A / D converter. Also, the case has been described where the encryption key is recorded on the S-magnetic material and the encrypted data is recorded on the high-retention recording magnetic material. However, the present invention is not limited to this. In the case where the confidential information is recorded on the high-holding recording magnetic material, the same operation can be performed as described above. In this case, the decryption unit is unnecessary, and the N signal extraction unit extracts only the pulse signal with the recording waveform on the high-retention recording magnetic material from which the pulse signal with the recording waveform on the S magnetic material has been removed, so that the confidential information can be obtained. Can be taken out.

[0089]

As described above in detail, according to the present invention, a magnetic card for processing a magnetic card capable of preventing forgery and tampering of the magnetic card without changing the transport mechanism of the device from the existing one. A card processor and a magnetic card processing method, and a card issuing machine and a magnetic card issuing method can be provided.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a schematic configuration of a magnetic card for explaining one embodiment of the present invention.

FIG. 2 is a perspective view illustrating a track configuration of a magnetic card.

FIG. 3 is a view for explaining the relationship between a DC magnetic field at the time of issuance in a one-time recording track, an erasing state, encoding information, a recording state of encoding information, a reproduction waveform and an encryption key.

FIG. 4 is a sectional view showing a configuration of a main part of the magnetic card issuing machine.

FIG. 5 is a block diagram showing a configuration of a control circuit of the magnetic card issuing machine.

FIG. 6 is a diagram for explaining signal waveforms at various parts in the reading circuit.

FIG. 7 is a diagram for explaining a relationship between a transport speed for transporting a magnetic card and a difference time T0.

FIG. 8 is a flowchart for explaining a magnetic card issuing process.

FIG. 9 is a sectional view showing a configuration of a main part of the magnetic card processing machine.

FIG. 10 is a block diagram showing a configuration of a control circuit of the magnetic card processor.

FIG. 11 is a flowchart illustrating a process of using a magnetic card.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Magnetic head 2 ... Base layer 3 ... Magnetic layer 4 ... One-time recording track (issue information track) 5 ... Read / write track (use track) 4a, 5a ... S magnetic body 4b, 5b ... High holding recording magnetic body 14 ... Conveyance paths 16, 17 ... Write head 18 ... Read heads 21, 41 ... Control units 22, 42 ... Operation panels 23, 43 ... Convey mechanism 24,25,25,26,26,44,46 ... Drivers 27,45 ... Reading circuits 27a and 45a ... Peak detectors 27b and 45b ... Window signal output units 27c and 45c ... Delay circuits 27d and 45d ... N signal extraction units 27e and 45e ... S signal extraction units 28 and 47 ... Decryption units

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification number Agency reference number FI Technical display location G07B 11/00 G06K 19/00 R G11B 5/80 B

Claims (21)

[Claims] 1. A first magnetic body for recording a recording content at a high level, and a second magnetic body having a characteristic that the holding power is initially set to be low and becomes extremely high once exposed to a magnetic field. And a magnetic layer consisting of
A first portion in which the first information is recorded only on the magnetic material, and a second portion in which the first information is recorded on the first magnetic material and the second information is recorded on the second magnetic material. A magnetic card processor for processing a magnetic card comprising: a first portion of the magnetic layer, the first portion of the magnetic layer being read, the first portion of the magnetic layer being read; Second
Reading means for simultaneously reading the first information and second information; separating means for separating the first information and the second information recorded on the second portion of the magnetic layer read by the reading means; A magnetic card processor comprising: an extracting unit that extracts the read first information and the first information separated from the second information by the separating unit. 2. The magnetic card processor according to claim 1, wherein the magnetic layer is formed by mixing a first magnetic material and a second magnetic material. 3. The magnetic card processor according to claim 1, wherein the magnetic layer is constituted by two layers of a first magnetic body and a second magnetic body. 4. A signal according to a first information obtained by detecting a peak of information read by the reading means, and a second signal obtained by detecting a peak within a predetermined time from the signal based on the first information. The magnetic card processor according to claim 1, wherein the first information and the second information are separated by a signal based on the information. 5. A first magnetic body for recording and maintaining a high recording content, and a second magnetic body which is initially set to have a low coercive force and has a characteristic that the coercive force becomes extremely high once exposed to a magnetic field. And a magnetic layer consisting of
And a second portion in which the confidential information is recorded only on the first magnetic material and a second portion in which the confidential information is recorded on the first magnetic material and the concealment information is recorded on the second magnetic material. In a magnetic card processor for processing a card, reading means for reading confidential information recorded on a first portion of the magnetic layer and simultaneously reading confidential information and concealed information recorded on a second portion, Separating means for separating confidential information and concealed information recorded on the second portion of the magnetic layer read by the reading means; confidential information read by the reading means and concealed information by the separating means Extracting means for extracting the obtained confidential information; and a magnetic card processor. 6. A first magnetic body for holding a record at a high recording level and a second magnetic body having a characteristic that the holding power is initially set to be low and becomes extremely high once exposed to a magnetic field. And a magnetic layer consisting of
A second portion in which the confidential information is recorded only in the magnetic material of the first magnetic material and a second portion in which the confidential information is recorded in the first magnetic material and the concealment information is recorded in the second magnetic material A magnetic card processor for processing a magnetic card comprising: reading secret information recorded in a first portion of the magnetic layer; and encrypting secret information and secret information recorded in a second portion of the magnetic layer. Reading means for reading the same at the same time; separating means for separating secret information and concealment encrypted information recorded in the second portion of the magnetic layer read by the reading means; Extracting means for extracting the confidential information and the confidential information separated from the encrypted information for concealment by the separating means, and encrypting the confidential information extracted by the extracting means for concealment separated by the separating means. With information A magnetic card processor, comprising: decoding means for decoding. 7. The magnetic card processor according to claim 6, wherein the magnetic layer is formed by mixing a first magnetic material and a second magnetic material. 8. The magnetic card processor according to claim 6, wherein the magnetic layer is constituted by two layers of a first magnetic body and a second magnetic body. 9. The method according to claim 1, wherein the separating unit uses a signal based on confidential information obtained by peak detection of the information read by the reading unit and concealment encryption information obtained by peak detection within a predetermined time from the signal based on the confidential information. 7. The magnetic card processor according to claim 6, wherein secret information and secret encryption information are separated by a signal. 10. A concealing means in the second part of the magnetic layer, wherein the second part of the magnetic layer is divided into a plurality of parts, and the reading means simultaneously reads the confidential information and the encrypted information for concealment. 7. The magnetic card processor according to claim 6, wherein the encryption information for concealment is indicated by the number of signals based on the encryption information. 11. The encryption information for concealment is indicated by a length or a distance from a second portion of the magnetic layer from which the confidential information and the encryption information for concealment are read simultaneously by the reading means. The magnetic card processor according to claim 6, wherein: 12. The concealment encryption information is indicated by the position of the second portion of the magnetic layer where the confidential information and the concealment encryption information are simultaneously read by the reading means. The magnetic card processing machine according to claim 6. 13. A first magnetic body for recording and maintaining a high recording content, and a second magnetic body which is initially set to have a low coercive force and has a characteristic that the coercive force becomes extremely high once exposed to a magnetic field. A first portion of the magnetic layer in which the first information is recorded only on the first magnetic material, and a second portion in which the first information is recorded on the first magnetic material. In processing a magnetic card composed of a magnetic material and a second portion in which second information is recorded, the first information recorded in the first portion of the magnetic layer is read, The first information recorded in the part and the second information
At the same time, separating the first information and the second information recorded on the read second portion of the magnetic layer, and reading the read first information and the second information. Extracting the first information separated from the information. 14. A first magnetic body for recording and maintaining a high recording content, and a second magnetic body which is initially set to have a low holding force and has a characteristic that the holding force is significantly increased once exposed to a magnetic field. A first portion in which confidential information is recorded only on the first magnetic material, and a confidential information recorded on the first magnetic material and concealed by the second magnetic material. Processing a magnetic card comprising a second part on which information is recorded, reading secret information recorded on the first part of the magnetic layer, and confidential information recorded on the second part; And the concealment information are read simultaneously, the confidential information and the concealment information recorded in the read second portion of the magnetic layer are separated, and the read confidential information and the concealment information separated from the concealment information are read. And extracting Care card processing method. 15. A first magnetic body for recording and maintaining a high recording content, and a second magnetic body which is initially set to have a low coercive force and has a characteristic that the coercive force becomes extremely high once exposed to a magnetic field. A first portion in which confidential information is recorded only on the first magnetic material, and a confidential information recorded on the first magnetic material and concealed by the second magnetic material. For processing a magnetic card consisting of a second part on which encrypted information for use is recorded, wherein secret information recorded on the first part of the magnetic layer is read and recorded on the second part. The secret information and the encryption information for concealment are simultaneously read, and the read confidential information and the encryption information for concealment recorded in the second portion of the magnetic layer are separated from each other. Separated from confidential information and encrypted information for concealment A method for processing a magnetic card, comprising extracting secret information and decrypting the extracted secret information using the separated encryption information for concealment. 16. A first magnetic body for recording and maintaining a high recording content, and a second magnetic body which is initially set to have a low coercive force and has a characteristic that the coercive force becomes extremely high once exposed to a magnetic field. A magnetic card issuance device for processing a magnetic card having a magnetic layer comprising: an erasing unit for partially erasing the second magnetic body of the magnetic layer with direct current based on second information; Recording means for recording first information on the magnetic layer using a magnetic head having a magnetic gap after partial DC erasing of the second magnetic material by the magnetic layer, wherein the magnetic layer has a first magnetic property. A first part in which the first information is recorded only on the body, and a second part in which the first information is recorded on the first magnetic body and the second information is recorded on the second magnetic body A magnetic card comprising: Line machine. 17. A first magnetic body for recording and maintaining a high recording content, and a second magnetic body which is initially set to have a low coercive force and has a characteristic that the coercive force becomes extremely high once exposed to a magnetic field. A magnetic card issuing machine for processing a magnetic card having a magnetic layer comprising: a erasing means for partially DC-erasing the second magnetic material of the magnetic layer based on concealment information; Recording means for recording confidential information on the magnetic layer using a magnetic head having a magnetic gap after partial DC erasure of the magnetic material of No. 2, wherein the magnetic layer is concealed only by the first magnetic material. Issuance of a magnetic card including a first portion where information is recorded and a second portion where confidential information is recorded on a first magnetic body and concealment information is recorded on a second magnetic body. A magnetic card issuing machine characterized by the following. 18. A first magnetic body for recording and maintaining a high recording content, and a second magnetic body which is initially set to have a low holding power and has a characteristic that the holding power becomes extremely high once exposed to a magnetic field. A magnetic card issuing machine for processing a magnetic card having a magnetic layer comprising: a erasing means for partially DC-erasing the second magnetic body of the magnetic layer based on concealment encryption information; Recording means for recording confidential information on the magnetic layer using a magnetic head having a magnetic gap after partial DC erasing of the second magnetic material by the erasing means, wherein the magnetic layer has a first magnetic property. A first portion in which the confidential information is recorded only on the body, and a second portion in which the confidential information is recorded on the first magnetic body and the concealment encrypted information is recorded on the second magnetic body. A magnetic card is issued. Ki card issuing machine. 19. A first magnetic body for recording at a high retention of recorded contents, and a second magnetic body having a characteristic that the holding power is initially set to be low and becomes extremely high once exposed to a magnetic field. A magnetic card having a magnetic layer comprising: a magnetic layer having a magnetic gap formed by partially erasing the second magnetic body of the magnetic layer based on second information; Using a magnetic head, first information is recorded on the magnetic layer, and the magnetic layer has a first portion in which the first information is recorded only on the first magnetic material, and a first portion on the first magnetic material. A magnetic card issuance method, comprising: issuing a magnetic card including a second part in which the first information is recorded and the second information is recorded in the second magnetic body. 20. A first magnetic body for recording at a high recording content and a second magnetic body having a characteristic that the holding force is initially set to be low and becomes extremely high once exposed to a magnetic field. A magnetic card having a magnetic layer comprising: a magnetic head having a magnetic gap having a magnetic gap after the second magnetic body of the magnetic layer is partially DC-erased based on concealment information; The first part in which the confidential information is recorded only on the first magnetic body and the second part in which the confidential information is recorded on the first magnetic substance are recorded. A magnetic card including a second part in which concealment information is recorded on the magnetic material. 21. A first magnetic body for recording and maintaining a high recording content, and a second magnetic body which is initially set to have a low coercive force and has a characteristic that the coercive force becomes extremely high once exposed to a magnetic field. In the magnetic card having a magnetic layer comprising: a second magnetic material of the magnetic layer is partially DC-erased based on concealment encryption information; The secret information is recorded on the magnetic layer using a magnetic head having: a first portion in which the secret information is recorded only on the first magnetic material, and the secret information is recorded on the first magnetic material. A magnetic card issuance method, comprising: issuing a magnetic card including a second portion in which encrypted information for concealment is recorded on a second magnetic body.