JPH09180356A - Machine and method for issuing magnetic card - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a magnetic card from being forged or altered by extracting ciphered data from a superposed signal through a high-pass filter and a low-pass filter and deciphering the data by using a ciphering key. SOLUTION: When a read head 35 read the data wherein the ciphering key of high frequency and issue information of low frequency are ciphered out of a one-time recording track 4 one over the other, the low-pass filter 27a in a read circuit 27 removes the ciphering key of high frequency and only information wherein the issue information of low frequency is ciphered is extracted and outputted. Further, the high-pass filter 27b in the read circuit 27 removes the data wherein the issue information of low frequency is ciphered and only the ciphering key of high frequency is extracted and outputted. Those data containing the ciphered issue information and ciphering key are demodulated and supplied to a ciphering and deciphering 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 issuing machine for issuing a magnetic card and a magnetic card issuing method.

[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]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention As described above, a magnetic card capable of preventing the forgery and falsification of the magnetic card is intended to eliminate the drawback that the magnetic card may be forged and falsified. An object of the present invention is to provide a magnetic card issuing machine and a magnetic card issuing method that can be issued.

[0006]

A magnetic card issuing machine according to the present invention has a first magnetic body for holding and recording recorded contents with a high level, and a holding force is initially set to be low so that it is remarkably exposed to a magnetic field once. What is claimed is: 1. A method for processing a magnetic card comprising a magnetic layer comprising a second magnetic body having a property of increasing the coercive force, wherein a cryptographic code for concealing the first magnetic body and the second magnetic body of the magnetic layer. A first recording means for recording the encrypted data, and the encrypted encryption data recorded on the second magnetic body on the magnetic layer on which the encrypted encryption data is recorded by the first recording means. Integrated with a second recording means for recording the encrypted data for concealment, which is recorded on the first magnetic body without being rewritten, by rewriting it to the confidential information encrypted by the encrypted data for concealment. To the first magnetic layer Encrypted data for concealing a magnetic body is recorded, the encrypted magnetic card confidential information is recorded has a configuration which is issued by the encrypted data for concealing the first magnetic body.

The magnetic card issuing machine of the present invention has a characteristic that the holding force is set low at first and the holding force is remarkably increased once exposed to the magnetic field, with the first magnetic body for keeping and recording the recorded contents with high retention. For processing a magnetic card having a magnetic layer formed by being mixed with a second magnetic body having a magnetic field, the concealing cipher in the first magnetic body and the second magnetic body of the magnetic layer. A first recording means for recording the encrypted data, and the encrypted encryption data recorded on the second magnetic body on the magnetic layer on which the encrypted encryption data is recorded by the first recording means. Integrated with a second recording means for recording the encrypted data for concealment, which is recorded on the first magnetic body without being rewritten, by rewriting it to the confidential information encrypted by the encrypted data for concealment. The magnetic layer A magnetic card in which encrypted data for concealment is recorded on the second magnetic body and secret information encrypted by the encrypted data for concealment is recorded on the first magnetic body is issued. .

The magnetic card issuing machine according to the present invention is characterized in that the holding force is set low at first and the holding force is remarkably increased once exposed to the magnetic field. Which processes a magnetic card having a magnetic layer composed of two layers with a second magnetic body having a magnetic field, the encryption for concealment in the first magnetic body and the second magnetic body of the magnetic layer. A first recording means for recording the encrypted data, and the encrypted encryption data recorded on the second magnetic body on the magnetic layer on which the encrypted encryption data is recorded by the first recording means. Integrated with a second recording means for recording the encrypted data for concealment, which is recorded on the first magnetic body without being rewritten, by rewriting it to the confidential information encrypted by the encrypted data for concealment. Of the above magnetic layer 2 of the encrypted data for concealing a magnetic body is recorded, the encrypted magnetic card confidential information is recorded has a configuration which is issued by the encrypted data for concealing the first magnetic body.

The magnetic card issuing machine of the present invention has a characteristic that the holding force is set low at first and the holding force is remarkably increased once exposed to the magnetic field, with the first magnetic body for holding and recording the recorded contents with high retention. In a magnetic card having a magnetic layer including a second magnetic body having a magnetic field, a concealed encrypted data is recorded on the first magnetic body and the second magnetic body of the magnetic layer. One recording means and an integral part of the first recording means, and the second magnetic material is recorded on the magnetic layer in which the encrypted data for concealment is recorded by the first recording means. A case where the concealed encrypted data recorded on the first magnetic body is rewritten to the concealed information encrypted by the concealed encrypted data without rewriting the concealed encrypted data; 2 recording means and the above Reading means for simultaneously reading the encrypted data for concealing the first magnetic material and the confidential information encrypted by the encrypted data for concealing the second magnetic material recorded in the air layer, and the reading means. First extracting means for extracting the encrypted data for concealment from the read content read by the means, and extracting the confidential information encrypted by the encrypted data for concealment from the read content read by the reading means A second extracting means, a decrypting means for decrypting the encrypted confidential information extracted by the second extracting means using the concealed encrypted data extracted by the first extracting means, and A second magnetic body of the magnetic layer, further comprising a permitting means for permitting issuance of a magnetic card when the secret information decrypted by the decrypting means and the secret information recorded by the second recording means match. Concealed in Encrypted data is recorded, has a structure in which a first magnetic card secret information encrypted by the encrypted data for hiding the magnetic material is recorded is issued.

[0010]

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

The magnetic layer 3 is a high-retentive recording magnetic material composed of barium ferrite, and its coercive force is initially set low 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 is, as shown in FIG. 2, a one-time recording track (issue information track) 4
And read / write track (use track) 5-2
Have two trucks.

The one-time recording track (issue information track) 4 records an encryption key as concealment information at the time of issuance, that is, in the initial state, so that the S magnetic body 4a records the recorded content with remarkably high holding power. However, the high-holding recording magnetic body 4b is a track for high-holding and recording the recorded content, and it is possible to read the recording magnetic flux recorded in both the magnetic bodies 4a and 4b during reading.

In the one-time recording track 4, once the magnetic field is exposed, the S magnetic body 4a changes to a remarkably high coercive force, so that the S magnetic body 4a cannot be re-recorded, and as a hidden information. The information to be recorded only at the time of issuance such as the encryption key (information that will not be rewritten if 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.

After the above-mentioned encryption key is recorded on the high-holding recording magnetic body 4b of the one-time recording track 4, the basic issuance information of the magnetic card 1 is data encrypted by the encryption key. Is being recorded.
At this time, the stored contents of the S magnetic body 4a are retained without being rewritten.

The basic issuance information is information indicating the amount of money, the issuing institution, and the applicable system range in the issuance, and the issue number as ΙD of the card. The encryption key recorded on the S magnetic body 4a of the one-time recording track 4 and the data obtained by encrypting the basic issue information recorded on the high holding recording magnetic body 4b with the encryption key are as shown in FIG. In addition, the frequency band is recorded differently, and the frequency band (high frequency) of the encryption key is higher than the frequency band (low frequency) of the data in which the basic issuance information is encrypted. .

The read / write track (track used) 5 is erased (application of a magnetic field) by a DC magnetic field at the time of issuing, that is, in the initial state, so that the S magnetic body 5a has a remarkably high holding force. The magnetic field cannot be rewritten and is invalidated, and the high-retention recording magnetic substance 5b erases the high-retention recording information and no information is recorded. If high-holding recording is further performed on this, the S magnetic substance 5a has changed to a remarkably high holding power and does not contribute to recording, but the high-holding recording magnetic substance 5b can perform recording, reading and rewriting as in the conventional case.

The read / write track (usage track) 5 is a conventional record of 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 cards 1 having the same magnetic material structure can be switched to applications having different properties by the first treatment, and tampering can be prevented by this.

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 has a carrying direction a shown in FIG.
Is transported on the transport path 14. As shown in FIG. 5, the write head 16 is composed of head portions 61 and 62 which respectively correspond to the one-time recording track 4 and the read / write track 5.

As shown in FIGS. 6 (a) and 6 (b), these head portions 61 and 62 are each constituted by a double gap head, and the head portions 61 and 62 are respectively the first writing portions 61a and 61a. 62a and second writing units 61b, 6
2b, and a magnetic field for recording or erasing can be separately applied to each. .

The read head 18 can read the one-time recording track 4 and the read / write track 5 separately. The write head 16 having the above-described configuration
In the conventional configuration (using a write head and a read head of a single gap head for magnetic writing and reading), it is possible to replace by replacing the write head. Can be compatible.

FIG. 7 is a block diagram showing the configuration of the 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,.
Driver 24 that drives the first writing section 61a of the head section 61 of the writing head 16;
The driver 25b for driving the second writing section 61b of the head section 61 of the writing head 16, the head section 6 of the writing head 16
No. 2 driver 26a for driving the first writing unit 62a, driver 26b for driving the second writing unit 62b of the head unit 62 of the writing head 16, and the read contents of the read head 18 are converted by MFM modulation, for example. A reading circuit 27 for demodulating by and a decryption unit 28 for decrypting the encryption are connected.

The control unit 21 controls the first and second writing units 61a and 61b of the head unit 61 of the writing head 16 and the head unit 6.
The write data to the first and second write units 62a and 62b of No. 2 are subjected to, for example, MFM modulation by a modulation circuit (not shown), and then each driver 25a, 25b, 26a, 26.
b. This modulation circuit may be provided in each driver 25a, 25b, 26a, 26b, or may be provided between each driver 25a, 25b, 26a, 26b and the control unit 21.

The reading circuit 27 includes a low-pass filter 27.
a and a high-pass filter 27b are provided. The low-pass filter 27a removes a high-frequency signal from the read signal from the read head 18 and outputs it.
For example, as shown in FIG. 8, when the high-frequency encryption key recorded in the one-time recording track 4 and the data in which the low-frequency issue information is encrypted are superimposed and read, the high-frequency encryption key is read. The encryption key is removed, and only the data in which the low-frequency issue information is encrypted as shown in FIG. 9 is output (extracted). This low pass filter 2
The encrypted data from 7a is output to the decryption unit 28 via a demodulation unit (not shown).

The high pass filter 27b is used for the read head 1.
Of the read signal to the one-time recording track 4 by 8 to remove and output the low-frequency signal. For example, as shown in FIG. 8, the high-frequency encryption recorded on the one-time recording track 4 is performed. When the data in which the key and the low-frequency issue information are encrypted is superimposed and read,
Data in which low-frequency issue information is encrypted is removed and only the high-frequency encryption key is output. The encryption key from the high pass filter 27b is output to the decryption unit 28 via a demodulation unit (not shown).

The deciphering section 28 has a high-pass filter 27.
a low-pass filter 27 based on the encryption key from b.
The encrypted data from a is decrypted, and the issued information as confidential information is output to the control unit 21 as the decryption result.

Next, regarding the issuing process of the magnetic card 1,
This will be described with reference to the flowchart shown in FIG. That is, the user designates the amount of money to be issued, the issuing institution, 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 section 21 drives the transport mechanism 23 by the driver 24 to cause 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).

Then, the control section 21 performs the MFM modulation of the encryption key of the predetermined frequency as the concealment information by the modulation circuit (not shown) through the driver 25a through the driver 25a to the first portion of the head section 61 of the write head 16. Writing unit 61
a, and the DC erase voltage is supplied to the first writing section 62a of the head section 62 of the writing head 16 via the driver 26a (ST3). The encryption key may be changed randomly.

As a result, the head portion 6 of the write head 16 is
The first writing unit 61a records the encryption key as the concealment information on the S magnetic body 4a and the high-holding recording magnetic body 4b of the one-time recording track 4, and the first writing unit 61a The writing section 62a of No. 1 applies a DC erasing magnetic field to the read / write track 5 to erase it (ST
4).

As a result, the S of the one-time recording track 4 is
The encryption key is recorded on the magnetic body 4a with a remarkably high coercive force, and the S magnetic body 5a of the read / write track 5 is erased with a remarkably high coercive force.

Next, the control unit 21 informs the amount of money, the issuing agency, and the range of the applicable system in the issuance as basic issuance information corresponding to the issuance conditions of the card designated by the operation panel 22, and the issuance number as ΙD of the card. The second writing of the encoding information (a predetermined frequency lower than the frequency of the encryption key) obtained by MFM-modulating the data encrypted by the above-mentioned encryption key via the driver 25b in the head portion 61 of the write head 16. The unit 61b supplies the encoded information of the format data as the information of the initial value to the second writing unit 62b of the head unit 62 of the writing head 16 via the driver 26b (ST5).

As a result, the head portion 6 of the write head 16 is
The second writing unit 61b of 1 rewrites the encryption key recorded in the high-holding recording magnetic body 4b of the one-time recording track 4, and the amount of money, the issuing agency, and the applicable system range in the issuance as the basic issuance information. , The data that the issue number is encrypted is recorded as ΙD of the card,
The second write section 62b of the head section 62 of the write head 16 records the initial value information such as format data on the read / write track 5 (ST6).

As a result, the S of the one-time recording track 4 is
A high-frequency encryption key is recorded on the magnetic body 4a with remarkably high holding power, and low-frequency data (data in which the basic issuing information is encrypted) as shown in FIG. 9 is recorded on the high-holding recording magnetic body 4b. After being recorded, the S magnetic body 5a of the read / write track 5 is in an erased state with a remarkably high coercive force, and format data is recorded on the high retentive recording magnetic body 5b.

Further, the reading head 18 reads the magnetic card 1. That is, the high-frequency encryption key recorded on the S magnetic body 4a of the one-time recording track 4 and the low-frequency basic issue information recorded on the high-retention recording magnetic body 4b are encrypted to read the data. I,
The read content is demodulated by the read circuit 27 and supplied to the decryption section 28, and the initial information recorded in the read / write track 5 is read, and the read content is demodulated by the read circuit 27 and mainly read. It is output to the control unit 21 (ST7).

In this case, as shown in FIG. 8, the reading head 35 superimposes the high-frequency encryption key recorded on the one-time recording track 4 and the data obtained by encrypting the low-frequency issuance information, and reads it. At this time, the low-pass filter 27a in the reading circuit 27 removes the high-frequency encryption key, and only the data in which the low-frequency issue information is encrypted as shown in FIG. 9 is extracted and output. It

Further, the high pass filter 27b in the reading circuit 27 removes the data in which the low frequency issuance information is encrypted, and only the high frequency encryption key is extracted and output.

The data and the encryption key in which the issued information is encrypted are demodulated and supplied to the decryption unit 28. The deciphering unit 28 deciphers the enciphered data based on the supplied enciphering key, and as the deciphering result, the amount of money, the issuing institution, and the range of the applying system in issuing as the issuing information as confidential information. The information indicating the issue number and the issue number as the card ID are output to the control unit 21 (ST
8).

As a result, the control unit 21 compares whether the issue information as the read content from the one-time recording track 4 and the issue information recorded are the same, and determines from the read content from the read / write track 5. The validity of the magnetic card 1 is confirmed by checking whether the format data is correctly recorded (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 by the operation panel 22 and issues the magnetic card 1 from the issuing port 19 (ST10). .

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

Further, the magnetic card 1 in which the issuance is abnormal
May be collected in a collection box (not shown). FIG. 11 is a cross-sectional view showing the configuration of the main part of the magnetic card processing machine.

That is, on the right side in the figure of the main body 31, there is provided an insertion opening 32 into which the magnetic card 1 is inserted.
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 has a carrying 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. FIG. 12 is a block diagram showing the configuration of the control circuit of the magnetic card processor.

That is, the control unit 41 controls the entire magnetic card processing machine. This control unit 41 has
Operation panel 42 for inputting processing contents, transport rollers, 3
3, a driver 44 for driving the transport mechanism 43, a reading circuit 45 for demodulating the contents read by the reading head 35 by inverse conversion of MFM modulation, a driver 46 for driving the writing head 36, and a deciphering unit for deciphering the cipher. 47 is connected.

The reading circuit 45 includes a low-pass filter 45.
a and a high-pass filter 45b are provided and have the same configuration as the reading circuit 27. The decryption unit 47
Based on the encryption key from the high pass filter 45b,
The encrypted data from the low-pass filter 45a is decrypted, and the issued information as secret information is output to the control unit 21 as the decryption result.

Next, the process of using the magnetic card 1 issued by the issuing process will be described with reference to the 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).

Then, the reading head 35 reads the magnetic card 1. That is, the high-frequency encryption key recorded on the S magnetic body 4a of the one-time recording track 4 and the low-frequency basic issue information recorded on the high-retention recording magnetic body 4b are encrypted to read the data. I,
The read content is demodulated by the reading circuit 45 and supplied to the decryption unit 47 (ST23).

In this case, as shown in FIG. 8, the read head 35 superimposes the high-frequency encryption key recorded on the one-time recording track 4 and the data obtained by encrypting the low-frequency issue information, and reads it. At this time, the low-pass filter 45a in the reading circuit 45 removes the high-frequency encryption key, and only the data in which the low-frequency issue information is encrypted as shown in FIG. 9 is extracted and output. It

Further, the high-pass filter 45b in the reading circuit 45 removes the data in which the low-frequency issue information is encrypted, and only the high-frequency encryption key is extracted and output.

The data and the encryption key in which the issued information is encrypted are demodulated and supplied to the decryption unit 47. The deciphering unit 47 deciphers the encrypted data based on the supplied encryption key, and as a result of the decipherment, the amount of money, the issuing agency, and the applicable system range in the issue as the issue information as confidential information are shown. The information indicating the issue number and the issue number as the card ID are output to the control unit 41 (ST2
4).

In step 23, the usage record such as the remaining amount recorded in the high-holding recording magnetic body 5b of the read / write track 5 is read, and the read content is demodulated by the reading circuit 45 and controlled. It is supplied to the section 41.

The control unit 41 judges the legitimacy of the decrypted basic issuance information (ST25), and when it judges that it is legitimate, calculates the remaining amount as a new usage record by subtracting the charge for this process from the remaining amount (( 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 encoding information of the remaining amount as a new usage record to the write 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).

After that, the control unit 41 drives the transport mechanism 43 by the driver 44 to drive the transport roller 3
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 section 41 (ST30).

As a result, the control section 41 judges the validity of the magnetic card 1 based on the fact that the read content of the read / write track 5 matches the recorded new usage 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).

When the validity of the magnetic card 1 is not judged in step 31, the control section 41 guides the fact that the received magnetic card 1 is an abnormal ticket by the operation panel 22, and the magnetic card 1 Is discharged from the insertion opening 32 (ST33).

As described above, in the one-time recording track composed of a mixture of two kinds of the S magnetic material and the high holding recording magnetic material or a two-layered structure, the write head composed of one double gap head. Then, the encryption key is recorded on the S magnetic material at a high frequency, and the issued information to be concealed on the high retention recording magnetic material is encrypted at the low frequency and recorded at a low frequency. The encrypted key and the encrypted data are extracted from the superimposed signal read from the device using a high-pass filter and a low-pass filter, respectively, and the encrypted data is issued using the encryption key. It is designed to be decrypted as information. Thus, falsification and forgery are prevented.

In the above embodiment, the case where the magnetic layer formed by mixing the high-holding recording magnetic material and the S magnetic material is coated on the entire surface of the magnetic card on the base layer will be described. However, not limited to this,
As shown in FIG. 14, the high retention recording magnetic material 51 and the S magnetic material 52 may be applied in a two-layer structure over the entire surface of the magnetic card 1 on the base layer 2.

In this case, the issuing process shown in FIG.
The usage process shown in 3 can be performed in the same manner. FIG.
As shown in FIG. 5, in the magnetic card, the S magnetic material 53 is applied only to the one-time recording track 4 portion on the base layer 2, and the high holding recording magnetic material 54 is applied only to the read / write track 5 portion. You may do it.

In this case, the issuing process shown in FIG.
The usage process shown in 3 can be performed in the same manner. FIG.
As shown in FIG. 3, in the magnetic card, the high-holding recording magnetic material 55 is applied over the entire surface of the magnetic card 1 on the base layer 2, and only the one-time recording track 4 is applied thereon.
The S magnetic material 56 (two-layer structure) may be applied.

Further, as shown in FIG. 17, in the magnetic card, the magnetic layer 57 (2 types) in which the S magnetic material and the high holding recording magnetic material are mixed is provided only in the one-time recording track 4 portion on the base layer 2. (Mixture) is applied, and the high-holding recording magnetic material 5 is applied over the entire surface other than the one-time recording track 4 portion.
8 may be applied. Also in the cases of FIGS. 16 and 17, the issuing process shown in FIG. 10 and the use process shown in FIG. 13 can be carried out in the same manner.

[0068]

As described above in detail, according to the present invention, a magnetic card capable of preventing the forgery and tampering of the magnetic card without changing the transport mechanism of the device from the existing one is issued. It is possible to provide a card issuing machine and a magnetic card issuing method.

[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 diagram for explaining a frequency band of data in which an encryption key and issue information recorded on a one-time recording track are encrypted.

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

FIG. 5 is a perspective view for explaining the configuration of a write head.

FIG. 6 is a diagram for explaining the configuration of the head portion of the write head.

FIG. 7 is a block diagram showing a configuration of a control circuit of the magnetic card issuing machine.

FIG. 8 is a diagram showing an example of a signal in which data in which low-frequency issuance information is encrypted and a high-frequency encryption key are superimposed.

FIG. 9 is a diagram showing a signal example of data in which low-frequency issuance information is encrypted.

FIG. 10 is a flowchart illustrating a magnetic card issuing process.

FIG. 11 is a cross-sectional view showing a configuration of a main part of a magnetic card processing machine.

FIG. 12 is a block diagram showing a configuration of a control circuit of the magnetic card processor.

FIG. 13 is a flowchart for explaining processing of using a magnetic card.

FIG. 14 is a sectional view showing a schematic configuration of a magnetic card.

FIG. 15 is a perspective view showing a schematic configuration of a magnetic card.

FIG. 16 is a perspective view showing a schematic configuration of a magnetic card.

FIG. 17 is a perspective view showing a schematic configuration of 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 ... Conveying path 16 ... Writing heads 16a, 16b ... Head section 18 ... Reading heads 21, 41 ... Control section 22, 42 ... Operation panel 23, 43 ... Conveying mechanism 24, 25a, 25b, 26a, 26b, 44, 46 ...
Driver 27, 45 ... Reading circuit 27a, 45a ... Low-pass filter 27b, 45b ... High-pass filter 28, 47 ... Decryption unit 61a, 62a ... First writing unit 61b, 62b ... Second writing unit

Continuation of front page (51) Int.Cl. ⁶ Identification number Office reference number FI Technical display location H04L 9/32 H04L 9/00 673E

Claims (8)

[Claims] 1. A first magnetic body for recording and maintaining a high recorded content, and a second magnetic body having a characteristic that the coercive force is initially set to be low and the coercive force is remarkably increased once exposed to a magnetic field. In a magnetic card issuing machine for processing a magnetic card having a magnetic layer consisting of, first recording means for recording encrypted data for concealment on the first magnetic body and the second magnetic body of the magnetic layer. And the encrypted magnetic data for concealment recorded on the second magnetic body is rewritten on the magnetic layer on which the encrypted data for concealment is recorded by the first recording means. A second recording unit that integrally records the recorded encrypted data for concealment by rewriting it to secret information encrypted by the encrypted data for concealment; The encrypted data for concealment on the second magnetic body Data is recorded, a magnetic card issuing machine, characterized in that encrypted magnetic card confidential information has been recorded is issued by the encrypted data for concealing the first magnetic body. 2. A first magnetic body for holding and recording the recorded contents with a high level, and a second magnetic body having a property that the coercive force is initially set to be low and the retentive force is remarkably increased once exposed to a magnetic field. In a magnetic card issuing machine for processing a magnetic card having a magnetic layer configured by mixing with, the encrypted data for concealment is recorded on the first magnetic body and the second magnetic body of the magnetic layer. And a first recording unit that does not rewrite the encrypted data for concealment recorded on the second magnetic body on the magnetic layer on which the encrypted data for concealment is recorded by the first recording unit. Second recording means for integrally recording the concealed encrypted data recorded on the first magnetic body by rewriting the concealed encrypted data to the secret information encrypted by the concealed encrypted data. , The second magnetism of the magnetic layer To encrypt data for concealment is recorded, a magnetic card issuing machine, characterized in that encrypted magnetic card confidential information has been recorded is issued by the encrypted data for concealing the first magnetic body. 3. A first magnetic body for keeping a recorded content with high retention, and a second magnetic body having a characteristic that the coercive force is initially set to be low and the retentive force is remarkably increased once exposed to a magnetic field. In a magnetic card issuing machine for processing a magnetic card having a magnetic layer composed of two layers, the encrypted data for concealment is recorded on the first magnetic body and the second magnetic body of the magnetic layer. And a first recording unit that does not rewrite the encrypted data for concealment recorded on the second magnetic body on the magnetic layer on which the encrypted data for concealment is recorded by the first recording unit. Second recording means for integrally recording the concealed encrypted data recorded on the first magnetic body by rewriting the concealed encrypted data to the secret information encrypted by the concealed encrypted data. A second magnetic body of the magnetic layer Encrypting data for concealment is recorded, a magnetic card issuing machine, characterized in that encrypted magnetic card confidential information has been recorded is issued by the encrypted data for concealing the first magnetic body. 4. A first magnetic body for holding and recording recorded contents with a high level, and a second magnetic body having a characteristic that the holding power is initially set low and the holding power is remarkably increased once exposed to a magnetic field. What is claimed is: 1. In a magnetic card having a magnetic layer comprising a magnetic layer, the encrypted data for concealment is recorded on the first magnetic body and the second magnetic body of the magnetic layer, and the concealed encryption is performed. The concealed encrypted data recorded on the first magnetic body is not rewritten on the magnetic layer on which the data is recorded without rewriting the concealed encrypted data recorded on the first magnetic body. The encrypted data is recorded by being rewritten to the confidential information encrypted by the encrypted data, the encrypted data for concealment is recorded on the second magnetic body of the magnetic layer, and the encrypted data for concealment is recorded on the first magnetic body. Confidential information encrypted by Magnetic card issuing method characterized by recording a magnetic card is issued. 5. A first magnetic body for recording and holding a recorded content with a high level, and a second magnetic body having a characteristic that the coercive force is initially set to be low and the magnetic field is remarkably increased once exposed to a magnetic field. In processing a magnetic card having a magnetic layer configured by mixing with, the encrypted data for concealment is recorded on the first magnetic body and the second magnetic body of the magnetic layer, and The concealed cipher data recorded on the first magnetic body without rewriting the concealed cipher data recorded on the second magnetic body on the magnetic layer on which the concealed encrypted data is recorded. The encrypted data is recorded by being rewritten to the secret information encrypted by the encrypted data for concealment, the encrypted data for concealment is recorded on the second magnetic body of the magnetic layer, and the encrypted data is recorded on the first magnetic body. Encrypted data for concealment Magnetic card issuing method characterized by reduction by magnetic card which the confidential information has been recorded is issued. 6. A first magnetic body for keeping and recording a recorded content with a high level, and a second magnetic body having a characteristic that a holding force is initially set to be low and the holding force is remarkably increased once exposed to a magnetic field. In processing a magnetic card having a magnetic layer composed of two layers by means of, the encrypted data for concealment is recorded on the first magnetic body and the second magnetic body of the magnetic layer, and The concealed cipher data recorded on the first magnetic body without rewriting the concealed cipher data recorded on the second magnetic body on the magnetic layer on which the concealed encrypted data is recorded. The encrypted data is recorded by being rewritten to the secret information encrypted by the encrypted data for concealment, the encrypted data for concealment is recorded on the second magnetic body of the magnetic layer, and the encrypted data is recorded on the first magnetic body. Encrypted with encrypted data for concealment Magnetic card issuing method characterized in that magnetic card confidential information is recorded which is is issued. 7. A first magnetic body for keeping and recording the recorded content with a high level, and a second magnetic body having a characteristic that the coercive force is initially set to be low and remarkably increases once exposed to a magnetic field. In a magnetic card issuing machine for processing a magnetic card having a magnetic layer consisting of, first recording means for recording encrypted data for concealment on the first magnetic body and the second magnetic body of the magnetic layer. And a concealment cipher recorded on the second magnetic body on the magnetic layer on which the concealed encrypted data is recorded by the first recording means. Second recording means for recording the encrypted data for concealment recorded on the first magnetic body without rewriting the encrypted data by rewriting it to the confidential information encrypted by the encrypted data for concealment And recorded on the above magnetic layer A reading unit that simultaneously reads the encrypted data for hiding the first magnetic body and the confidential information that is encrypted by the encrypted data for hiding the second magnetic body, and the reading read by the reading unit. First extracting means for extracting the encrypted data for concealment from the content, and second extracting means for extracting the confidential information encrypted by the encrypted data for concealment from the read content read by the reading means. A decrypting means for decrypting the encrypted confidential information extracted by the second extracting means using the concealed encrypted data extracted by the first extracting means, and decrypting by the decrypting means. And a secret information recorded by the second recording means, the permission means for permitting the issuance of the magnetic card is provided, and the secret information is concealed by the second magnetic body of the magnetic layer. encryption Over data is recorded, a magnetic card issuing machine, characterized in that encrypted magnetic card confidential information has been recorded is issued by the encrypted data for concealing the first magnetic body. 8. A first magnetic body for keeping and recording a recorded content with a high level, and a second magnetic body having a characteristic that the coercive force is initially set to be low and remarkably increases once exposed to a magnetic field. In a magnetic card having a magnetic layer comprising a magnetic layer, the encrypted data for concealment is recorded on the first magnetic body and the second magnetic body of the magnetic layer, and the first recording means is used. And the encrypted data for concealment recorded in the second magnetic body on the magnetic layer on which the encrypted data for concealment is recorded by the first recording means without being rewritten. The first encrypted magnetic data recorded on the magnetic layer is recorded by rewriting the encrypted data for concealment recorded on the magnetic material of No. 1 by rewriting the confidential information encrypted by the encrypted data for concealment. Encrypted data for body hiding At the same time, the secret information encrypted by the concealed encrypted data of the second magnetic body is read, the concealed encrypted data is extracted from the read content, and the concealed encrypted data is encrypted. The secret information that has been extracted is extracted, and these extracted secret information that has been encrypted are decrypted using encrypted data for concealment, and the decrypted secret information and the secret information that has been recorded match. At this time, the issuance of the magnetic card is permitted, the encrypted data for concealment is recorded on the second magnetic body of the magnetic layer, and the confidential information encrypted by the encrypted data for concealment on the first magnetic body. A magnetic card issuing method, wherein a magnetic card on which is recorded is issued.