JP3813676B2 - Magnetic card processing system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a magnetic card processing machine 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]
[Prior art]
In magnetic card processing machines that process magnetic information of magnetic cards used for station service applications, distribution applications, etc., there is a high need for easy and stable processing, but recorded information can be easily read and decoded by a third party. A method that cannot be tampered with is desired.
[0003]
Therefore, it has a first magnetic body that records the recorded content with high retention, and a second magnetic body that has a characteristic that the retention strength is initially set low and the retention strength becomes significantly high when exposed to a magnetic field once. Magnetic cards have been proposed. It is considered that different signals are recorded for the first magnetic body and the second magnetic body of the magnetic card, and the signals of the respective magnetic bodies are separated and processed during demodulation.
[0004]
In such a magnetic card processing method, since the method of separating the superimposed signals is special, the conventional magnetic card processor cannot demodulate the signals recorded on the magnetic card. ing.
Therefore, a signal recorded by a new processing method cannot be demodulated by a conventional magnetic card processor, and there is a problem in compatibility.
[0005]
[Problems to be solved by the invention]
As described above, the signal recorded by the new processing method can be demodulated by the conventional magnetic card processor, eliminating the disadvantage of compatibility problems. It is an object of the present invention to provide a magnetic card processing system which can be demodulated by a conventional magnetic card processor and can be compatible.
[0006]
[Means for Solving the Problems]
The magnetic card processing system according to the present invention has a first magnetic body that records and retains recorded content at a high level, and has a characteristic in which the holding force is initially set low and the holding force is remarkably increased once exposed to a magnetic field. A magnetic card issuing machine that issues a magnetic card having a magnetic layer made of two magnetic materials, and first and second magnetic card processing machines that process the magnetic card issued by the magnetic card issuing machine. The magnetic card issuing machine comprises recording means for recording basic issuance information on the first magnetic body of the magnetic layer of the magnetic card and recording concealment information on the second magnetic body, wherein the first magnetic card A processor for reading basic issue information recorded on the first magnetic body of the magnetic layer of the magnetic card and concealment information recorded on the second magnetic body; By 1 reading means Separation means for separating the read basic issuance information and concealment information; first determination means for judging forgery of the magnetic card according to whether or not the concealment information is separated by the separation means; and And a second determination unit that determines the validity of the magnetic card based on the basic issuance information separated by the separation unit when the determination unit determines that the magnetic card is not counterfeit. The card processing machine reads the basic issue information recorded on the first magnetic body of the magnetic layer of the magnetic card, and the magnetic card by the basic issue information read by the second reading means. And third determining means for determining the legitimacy.
[0007]
The magnetic card processing system according to the present invention has a first magnetic body that records and retains recorded content at a high level, and has a characteristic in which the holding force is initially set low and the holding force is remarkably increased once exposed to a magnetic field. A magnetic card issuing machine that issues a magnetic card having a magnetic layer made of two magnetic materials, and first and second magnetic card processing machines that process the magnetic card issued by the magnetic card issuing machine. The above magnetic card issuing machine
The magnetic card comprises a recording means for recording basic issuance information on the first magnetic body of the magnetic layer of the magnetic card and recording concealment information on the second magnetic body. First issuance information recorded on the first magnetic body of the magnetic layer and concealment information recorded on the second magnetic body are read using a first magnetic head having a predetermined magnetic gap width. The forgery of the magnetic card is determined based on whether the concealment information is separated by the separation means and the separation means for separating the basic issue information and the concealment information read by the first reading means. A first determination unit that determines the validity of the magnetic card based on the basic issuance information separated by the separation unit when the first determination unit determines that the magnetic card is not counterfeit. And the judgment means The second magnetic card processor uses the basic issue information recorded on the first magnetic body of the magnetic layer of the magnetic card to have a magnetic gap width larger than the magnetic gap width of the first magnetic head. A second reading unit that reads using the second magnetic head, and a third determination unit that determines the validity of the magnetic card based on the basic issuance information read by the second reading unit.
[0008]
The magnetic card processing system according to the present invention has a first magnetic body that records and retains recorded content at a high level, and has a characteristic in which the holding force is initially set low and the holding force is remarkably increased once exposed to a magnetic field. A magnetic card issuing machine that issues a magnetic card having a magnetic layer made of two magnetic materials, and first and second magnetic card processing machines that process the magnetic card issued by the magnetic card issuing machine. The magnetic card issuing machine comprises recording means for recording basic issuance information on the first magnetic body of the magnetic layer of the magnetic card and recording concealment information of a predetermined pattern on the second magnetic body. 1st reading means with which 1 magnetic card processing machine reads the basic issue information recorded on the 1st magnetic body of the magnetic layer of the above-mentioned magnetic card, and the concealment information recorded on the 2nd magnetic body And this first The forgery of the magnetic card is determined by separating means for separating basic issue information and concealment information read by the reading means, and whether or not the pattern of concealment information separated by the separating means matches a predetermined pattern. A first determination unit; and a second determination unit configured to determine validity of the magnetic card based on the basic issuance information separated by the separation unit when the first determination unit determines that the magnetic card is not counterfeit. A second reading means for reading basic issuance information recorded on the first magnetic body of the magnetic layer of the magnetic card, and the second reading means. And third determination means for determining the validity of the magnetic card based on the basic issue information read by the means.
[0009]
The magnetic card processing system according to the present invention has a first magnetic body that records and retains recorded content at a high level, and has a characteristic in which the holding force is initially set low and the holding force is remarkably increased once exposed to a magnetic field. A magnetic card issuing machine that issues a magnetic card having a magnetic layer made of two magnetic materials, and first and second magnetic card processing machines that process the magnetic card issued by the magnetic card issuing machine. The magnetic card issuing machine comprises recording means for recording basic issuance information on the first magnetic body of the magnetic layer of the magnetic card and recording concealment information of a predetermined pattern on the second magnetic body. The first magnetic card processor uses the basic issuance information recorded on the first magnetic body of the magnetic layer of the magnetic card and the concealment information recorded on the second magnetic body to obtain a predetermined magnetic gap width. The first magnet of A first reading unit that reads using the head, a separation unit that separates the basic issue information and the concealment information read by the first reading unit, and a pattern of the concealment information separated by the separation unit is a predetermined pattern. The first determination means for determining whether the magnetic card is counterfeited or not, and when the first determination means determines that the magnetic card is not counterfeit, the separation means separates the magnetic card. Basic information recorded on the first magnetic body of the magnetic layer of the magnetic card is composed of second determining means for determining the validity of the magnetic card based on the basic issue information. Read information is read using a second magnetic head having a magnetic gap width larger than the magnetic gap width of the first magnetic head, and read by the second reading means. And a third determination means for determining the validity of the magnetic card by the basic issue information to be.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows a magnetic card processing system that handles a magnetic card 1 coated with a magnetic material such as a commuter pass, a ticket, and a prepaid card used in transportation and distribution.
[0011]
This magnetic card processing system includes a magnetic card issuing machine 2 for issuing a magnetic card 1, a new type magnetic card processing machine 3 for processing the magnetic card 1, and an old type magnetic card processing machine 4 for processing the magnetic card 1. Has been.
[0012]
The magnetic card issuing machine 2 issues a magnetic card 1 on which information is recorded in consideration of security, and the magnetic card processing machine 3 applies the magnetic card 1 on which information is recorded in consideration of security. The magnetic card processor 4 processes the magnetic card 1 on which information is recorded in a normal form.
[0013]
As the magnetic card 1, a prepaid card having a price function such as a monetary amount will be described as an example.
As shown in FIG. 2, the magnetic card 1 is provided with a magnetic layer 6 in which a high-retention recording magnetic material and another magnetic material are mixed on a base layer 5. The base layer 5 is made of PET (polyethylene terephthalate) or paper.
[0014]
The magnetic layer 6 has a high retention magnetic material composed of barium ferrite and initially has a low retention force by a special treatment, but once it is exposed to a magnetic field, the retention force is significantly increased. S magnetic material having characteristics (recording with a conventional magnetic head is difficult) {for example, MnBi (manganese bismuth) magnetic powder, whose holding power varies greatly between the initial state and after exposure to a magnetic field} A mixture is applied to the base layer 5.
[0015]
The magnetic layer 6 of the magnetic card 1 has two tracks, a one-time recording track (issue information track) 7 and a read / write track (usage track) 8 as shown in FIG.
[0016]
The one-time recording track (issue information track) 7 is partially erased by a DC magnetic field (magnetic field) as shown in FIG. 4A at the time of issue by the magnetic card issuer 2, that is, in the initial state. 4), as shown in FIG. 4 (b), the S magnetic body 7a is partially invalidated because it has a remarkably high holding force and cannot be rewritten, and the high holding recording magnetic body ( (N magnetic material) 7b erases the highly retained recording information and no information is recorded.
[0017]
As a result, the S magnetic body 7a partially changes to a significantly higher holding force, and the concealment information is recorded by the portion of the S magnetic body 7a that has changed to a higher holding force.
[0018]
Further, as shown in FIG. 4 (c), if high retention recording is performed on the basic issue information of the magnetic card 1, as shown in FIG. 4 (d), the remarkably high holding force of the S magnetic body 7a. The portion that has changed to does not contribute to recording, but recording is performed on the corresponding high-retention recording magnetic body 7b as usual, and the portion that has not changed to a remarkably high holding force of the S magnetic body 7a corresponds to the corresponding high-retention. Data recording is performed simultaneously with the recording magnetic body 7b.
[0019]
The S magnetic body 7a records the recorded content with a remarkably high holding force, and the high-retained recording magnetic body 7b records the recorded content with a high retention. The recording recorded on both the magnetic bodies 7a and 7b also in reading. The magnetic flux can be read.
[0020]
In the one-time recording track 7, once the magnetic field is exposed, the S magnetic body 7a changes to a remarkably high holding force, and the S magnetic body 7a cannot be recorded again. Information that is recorded only (information that does not rewrite once recorded at the time of issuance) is recorded. As a result, the S magnetic material 7a of the one-time recording track 7 cannot be rewritten, so that recording that is difficult to falsify is possible.
[0021]
Further, the basic issue information of the magnetic card 1 is recorded on the high retention recording magnetic body 7b of the one-time recording track 7.
The basic issuance information is information indicating the amount of issue, the issuing institution, and the scope of the application system, and issuance number as card ΙD.
[0022]
The read / write track (usage track) 8 is erased by a DC magnetic field (application of a magnetic field) at the time of issuance by the magnetic card issuing machine 2, that is, in an initial state, so that the S magnetic body 8a is remarkably produced. Since the magnetic force cannot be rewritten due to a high holding force, the high holding recording magnetic body 8b is invalidated, and the high holding recording information is erased and no information is recorded. If the recording is further performed with high retention, the S magnetic body 8a is changed to a remarkably high retention force and does not contribute to recording. However, the high retention recording magnetic body 8b can be recorded, read and rewritten as usual.
[0023]
The read / write track (usage record track) 8 is used as a recording area for sequential information such as record records for each conventional use (transactions such as consideration), balance record (billing information), and the like. That is, as information generated for each use, a usage record and remaining amount information such as a used amount, a code indicating purchased property information, a processing date and time, a processed place, and a remaining amount are recorded. Since this track is repeatedly recorded and read each time it is used, it is a track that must be rewritten.
[0024]
In this way, the magnetic card 1 having the same magnetic structure can be switched to an application having a different property by the first processing, and this can prevent falsification.
[0025]
FIG. 5 is a cross-sectional view showing the configuration of the main part of the magnetic card issuing machine 1.
That is, on the left side of the main body 11 in the figure, a stacker 12 in which a plurality of magnetic cards 1 before issue are stored is provided. The magnetic cards 1 of the stacker 12 are taken out one by one by a take-out roller 13 and are carried by a carrying path 14. The transport path 14 is provided with transport rollers 15 for transporting the magnetic card 1. Also, 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 with a DC magnetic field, and a read head for reading information recorded on the magnetic card 1. 18 are sequentially provided. The magnetic card 1 read by the reading head 18 is issued from an issue port 19 provided at the end portion of the conveyance path 14.
[0026]
The magnetic card 1 is transported on the transport path 14 in the transport direction a shown in FIG.
The write heads 16 and 17 and the read head 18 are each composed of a head having a magnetic gap.
[0027]
The write heads 16 and 17 can separately record on the one-time recording track 7 and the read / write track 8.
The read head 18 can separately read the one-time recording track 7 and the read / write track 8.
[0028]
FIG. 6 is a block diagram showing the configuration of the control circuit of the magnetic card issuing machine 2.
That is, the control unit 21 controls the entire magnetic card issuing machine 2. The control unit 21 includes an operation panel 22 for inputting issuance contents and the like, a driver 24 for driving the transport mechanism 23 by the take-out roller 13 and the transport rollers 15,..., A driver 25 for driving the write head 16, and a write head 17 And a reading circuit 27 that demodulates the content read by the reading head 18 by, for example, inverse conversion of MFM modulation.
[0029]
The controller 21 supplies write data to the write heads 16 and 17 to the drivers 25 and 26 after performing MFM modulation, for example, by a modulation circuit (not shown). The modulation circuit may be provided in the drivers 25 and 26 or may be provided between the drivers 25 and 26 and the control unit 21.
[0030]
The reading circuit 27 includes a peak detector 27a, a window signal output unit 27b, a delay circuit 27c, an N signal extraction unit 27d, and an S signal extraction unit 27e, and is recorded on the one-time recording track 7. The encryption key is extracted, and the data in which the issue information is encrypted is extracted.
[0031]
The peak detector 27a detects the peak of the read signal from the read head 18, and outputs a pulse signal corresponding to the peak. For example, as shown in FIG. The peak is detected from the waveform obtained by the portion where the signal can be read from both the S magnetic body 7a and the high retention recording magnetic body 7b and the portion where the signal can be read only from the high retention recording magnetic body 7b. A corresponding pulse signal is output.
[0032]
In a portion where signals can be read from both the S magnetic body 7a and the high retention recording magnetic body 7b, the read signal from the read head 18 is a signal from the high retention recording magnetic body 7b as shown in FIG. The sum of magnetic fluxes of the waveform (N) and the signal waveform (S) by the S magnetic body 7a is output with a delay of the difference time T0.
[0033]
The difference time T0 is related to the value of the conveyance speed for conveying the magnetic card 1 as shown in FIG. The conditions relating to the difference time T0 are as follows: recording signal: 105 BPI (bit per inch), recording modulation method: F2F, recording head: 2.4 mm track width, gap width 60 μm, and recording current 1 A _0-P The reproducing head has a track width of 1 mm and a gap width of 40 μm.
[0034]
By detecting the peak of the read signal from the read head 18 with the peak detector 27a, as shown in FIG. 7B, the pulse signal from the high-retention recording magnetic body 7b and the difference time T0 from the pulse signal are detected. A pulse signal from the S magnetic body 7a is output with a delay (with polarity check). The pulse signal output from the peak detector 27a is supplied to the window signal output unit 27b and the delay circuit 27c.
[0035]
As shown in FIG. 7C, the window signal output unit 27b outputs a window signal for differential time detection having a time width T2 after a time T1 after the pulse signal is supplied from the peak detector 27a. is there. The window signal from the window signal output unit 27b is supplied to the N signal extraction unit 27d and the S signal extraction unit 27e.
[0036]
The delay circuit 27c delays the pulse signal from the peak detector 27a by the processing time by the window signal output unit 27b. The pulse signal from the delay circuit 27c is supplied to the N signal extraction unit 27d and the S signal extraction unit 27e.
[0037]
The N signal extraction unit 27d inhibits the pulse signal from the delay circuit 27c by the window signal from the window signal output unit 27b, thereby recording the high-retention recording magnetic material 7b as shown in FIG. Only the pulse signal (N signal) based on the waveform is extracted.
[0038]
The S signal extraction unit 27e takes the AND of the pulse signal from the delay circuit 27c and the window signal from the window signal output unit 27b, thereby recording on the S magnetic body 7a as shown in FIG. Only a pulse signal (S signal) with a waveform is extracted, and this signal is also used as a detection signal for the S magnetic body 7a.
[0039]
The pulse signal based on the recording waveform on the high-retention recording magnetic body 7b from the N signal extraction unit 27d and the pulse signal based on the recording waveform on the S magnetic body 7a from the S signal extraction unit 27e are sent via a demodulation unit (not shown). The data is output to the decryption unit 28.
[0040]
Next, the issuing process of the magnetic card 1 by the magnetic card issuing machine 2 will be described with reference to the flowchart shown in FIG.
That is, the operation panel 22 designates the amount of issue, the issuing institution, the application system range and the issue number as the card issue conditions, and inputs a start key (not shown) (ST1).
[0041]
Then, the controller 21 drives the transport mechanism 23 by the driver 24 to rotate 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 carried by the carrying path 14 (ST2).
[0042]
Next, the control unit 21 supplies a DC erase signal for each predetermined section (see FIG. 4A) corresponding to the concealment information for the one-time recording track 7 and a DC erase signal for the entire read / write track 8 to the driver 25. Is supplied to the write head 16 via ST3 (ST3). The predetermined section corresponding to the concealment information may be changed randomly.
[0043]
As a result, a DC erasing magnetic field is applied to the one-time recording track 7 by the write head 16 every predetermined section, and is partially erased (see FIG. 4B), and the entire read / write track 8 is DC erased. A magnetic field is applied and erased (ST4).
[0044]
As a result, the S magnetic body 7a of the one-time recording track 7 is partially erased with a very high holding force, and the entire S magnetic body 8a of the read / write track 8 is erased with a very high holding force.
[0045]
At this time, the control unit 21 stores basic issuance information in an internal memory (not shown).
Next, the control unit 21 performs MFM modulation on the issuance number as the card 情報 D, information indicating the amount / issuing institution / applicable system range in the issuance as basic issuance information corresponding to the issuance condition of the card specified by the operation panel 22 The encoded information (see (c) of FIG. 4) and the encoded information of the format data as the initial value are supplied to the write head 17 via the driver 26 (ST5).
[0046]
As a result, the write head 17 records the issue number as information を D on the card, information indicating the range of the amount, issue organization, and applicable system in issue as basic issue information on the one-time recording track 7. At this time, as shown in FIG. 4D, in the portion of the high retention recording magnetic body 7b in which the S magnetic body 7a is in the erased state, the above data is recorded as it is only in the high retention recording magnetic body 7b. In the portion where the S magnetic body 7a is not in the erased state, the above data is recorded simultaneously on the S magnetic body 7a and the high retention recording magnetic body 7b, and initial value information such as format data is recorded on the read / write track 8. (ST6).
[0047]
As a result, the S magnetic material 7a of the one-time recording track 7 is composed of a portion erased with a remarkably high holding force and a portion where basic issue information is recorded, and the basic issue information is stored in the high retention recording magnetic material 7b. Is recorded, the S magnetic body 8a of the read / write track 8 is in an erased state with a remarkably high holding force, and format data is recorded in the high holding recording magnetic body 8b.
[0048]
Further, the magnetic card 1 is read by the read head 18. That is, part of the basic issuance information recorded on the S magnetic body 7a of the one-time recording track 7 and the basic issuance information recorded on the high retention recording magnetic body 7b are read, and the read content is read by the reading circuit. 27 is demodulated and supplied to the control unit 21, and the initial information recorded in the read / write track 8 is read, and the read contents are demodulated by the reading circuit 27 and output to the control unit 21 ( ST7).
[0049]
That is, the peak detector 27a detects the peak of the read signal from the read head 18, and as a pulse signal corresponding to the peak, for example, as shown in (e) and (f) of FIG. The peak is detected from the waveform obtained by the portion where the signal can be read from both the S magnetic body 7a and the high retention recording magnetic body 7b and the portion where the signal can be read only from the high retention recording magnetic body 7b, and corresponds to the peak. The pulse signal is output to the window signal output unit 27b and the delay circuit 27c.
[0050]
That is, at the portion where the signal can be read from both the S magnetic body 7a and the high retention recording magnetic body 7b, the read signal from the read head 18 is obtained by the high retention recording magnetic body 7b as shown in FIG. The sum of magnetic fluxes of the signal waveform and the signal waveform by the S magnetic body 7a is output with a delay of the difference time T0. By detecting the peak of this signal with the peak detector 27a, as shown in FIG. 7 (b), the S magnetic body 7a is delayed with a delay time T0 from the pulse signal by the high retention recording magnetic body 7b and this pulse signal. Is output as a pulse signal.
[0051]
As shown in FIG. 7 (c), the window signal output unit 27b supplies a window signal for differential time detection of the time width T2 after the time T1 after the pulse signal is supplied from the peak detector 27a. 27d and output to the S signal extraction unit 27e.
[0052]
The N signal extraction unit 27d inhibits the pulse signal supplied from the peak detector 27a via the delay circuit 27c by the window signal from the window signal output unit 27b, thereby depending on the recording waveform in the high retention recording magnetic body 7b. Only the pulse signal is extracted and output to the control unit 21 via a demodulation unit (not shown).
[0053]
By taking an AND between the pulse signal supplied from the peak detector 27a through the delay circuit 27c and the window signal from the window signal output unit 27b by the S signal extraction unit 27e, the S waveform is generated by the S magnetic body 7a. Only the pulse signal is extracted and output to the control unit 21 via a demodulation unit (not shown).
[0054]
Thereby, the control unit 21 confirms the recording of the concealment information by the pulse signal from the S signal extraction unit 27e, and when this confirmation is made, issuance information as data (read contents) from the N signal extraction unit 27d. And the issued issue information that has been recorded are compared, and the validity of the magnetic card 1 is confirmed based on whether the format data is correctly recorded according to the read contents from the read / write track 8 (ST9).
[0055]
As a result, when the validity of the magnetic card 1 is confirmed, the control unit 21 guides the correct card issuance through the operation panel 22 and issues the magnetic card 1 from the issue port 19 (ST10).
[0056]
If the validity of the magnetic card 1 is not confirmed in step 58, the control unit 21 guides the card issuance abnormality through the operation panel 22, and ejects the magnetic card 1 from the issuance port 19 (ST11). .
[0057]
In addition, the magnetic card 1 that has been issued abnormally may be collected in a collection box (not shown).
FIG. 10 is a cross-sectional view showing a configuration of a main part of the magnetic card processor 3.
[0058]
That is, an insertion port 32 into which the magnetic card 1 is inserted is provided on the right side of the main body 31 in the figure. The magnetic card 1 inserted into the insertion slot 32 is transported on the 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,. A reading head 35 that reads information on the magnetic card 1 and a writing head 36 that records information on the magnetic card 1 are provided in the conveyance path 34. The read head 35 reads information from the magnetic card 1 inserted through the insertion slot 32 or reads the recorded information from the magnetic card 1 on which information is recorded by the write head 36. The write head 36 records information on the magnetic card 1 being conveyed.
[0059]
The magnetic card 1 is transported on the transport path 34 in the transport direction b shown in FIG.
The write head 36 can apply a magnetic field for recording or erasing separately to the one-time recording track 7 and the read / write track 8.
[0060]
The read head 35 can separately read the one-time recording track 7 and the read / write track 8.
The read head 35 and the write head 36 are each composed of a head having a magnetic gap. The magnetic gap width of the read head 35 is narrow and has good sensitivity.
[0061]
FIG. 11 is a block diagram showing the configuration of the control circuit of the magnetic card processor 3.
That is, the control unit 41 controls the entire magnetic card processor. The control unit 41 includes an operation panel 42 for inputting processing contents, a driver 44 for driving the transport mechanism 43 by the transport rollers 33,... And a reading circuit for demodulating the content read by the read head 35 by, for example, inverse conversion of MFM modulation. 45 and a driver 46 for driving the write head 36 are connected.
[0062]
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, and has the same configuration as the reading circuit 27. .
[0063]
The control unit 41 confirms the recording of the concealment information based on the pulse signal from the S signal extraction unit 45e, and based on the confirmation result, the control unit 41 determines the basic issuance information as the confidential information from the N signal extraction unit 45d. Output.
[0064]
Next, the use process in the magnetic card processing machine 3 of the magnetic card 1 issued by the magnetic card issuing machine 2 will be described with reference to the flowchart shown in FIG.
[0065]
That is, when 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, thereby correcting the transport rollers 33,. Rotate in the direction. Thereby, the magnetic card 1 inserted from the insertion slot 32 is conveyed by the conveyance path 34 (ST22).
[0066]
Next, the magnetic card 1 is read by the read head 35. That is, the concealment information recorded on the S magnetic material 7a of the one-time recording track 7 and the basic issuance information recorded on the high retention recording magnetic material 7b are read, and the read contents are demodulated by the reading circuit 45. The initial information supplied to the control unit 41 and recorded on the read / write track 8 is read, and the read content is demodulated by the reading circuit 45 and output to the control unit 41 (ST23).
[0067]
That is, the peak detector 45a detects the peak of the read signal from the read head 35, and as a pulse signal corresponding to the peak, for example, as shown in FIG. The peak is detected from the waveform obtained by the portion where the signal can be read from both the body 7a and the high retention recording magnetic body 7b and the portion where the signal can be read only from the high retention recording magnetic body 7b, and the pulse signal corresponding to the peak is detected. Is output to the window signal output unit 45b and the delay circuit 45c.
[0068]
That is, at the portion where the signal can be read from both the S magnetic body 7a and the high retention recording magnetic body 7b, the read signal from the read head 18 is obtained by the high retention recording magnetic body 7b as shown in FIG. The sum of magnetic fluxes of the signal waveform and the signal waveform by the S magnetic body 7a is output with a delay of the difference time T0. By detecting the peak of this signal with the peak detector 45a, as shown in FIG. 7B, the S magnetic body 7a is delayed by a delay time T0 from the pulse signal from the high retention recording magnetic body 7b and this pulse signal. Is output as a pulse signal.
[0069]
As shown in FIG. 7 (c), the window signal output unit 45b converts the window signal for differential time detection of the time width T2 into the N signal extraction unit after time T1 after the pulse signal is supplied from the peak detector 45a. 45d and output to the S signal extraction unit 45e.
[0070]
The N signal extraction unit 45d inhibits the pulse signal supplied from the peak detector 45a via the delay circuit 45c with the window signal from the window signal output unit 45b, thereby depending on the recording waveform in the high-retention recording magnetic body 7b. Only the pulse signal is extracted and output to the control unit 41 via a demodulation unit (not shown).
[0071]
By the AND operation of the pulse signal supplied from the peak detector 45a through the delay circuit 45c and the window signal from the window signal output unit 45b by the S signal extraction unit 45e, the S waveform is generated by the S magnetic body 7a. Only the pulse signal is extracted and output to the control unit 41 via a demodulation unit (not shown).
[0072]
Thereby, the control unit 41 confirms the recording of the concealment information based on the pulse signal from the S signal extraction unit 45e, and when this confirmation is made, the signal from the N signal extraction unit 45d is the basic information as the confidential information. The issue information is determined (ST24).
[0073]
That is, the control unit 41 determines whether or not forgery is based on whether or not a pulse signal is obtained from the S signal extraction unit 45e, and whether or not the data recorded in the S magnetic body 7a is valid based on the determination result. It can be determined whether or not falsification and counterfeiting can be prevented.
[0074]
In step 23, the usage record such as the remaining amount recorded on the high-retention recording magnetic body 8b of the read / write track 8 is read, and the read contents are demodulated by the reading circuit 45 to the control unit 41. Supplied.
[0075]
When the recording of the concealment information is confirmed in step 24, the control unit 41 determines the validity of the basic issue information (ST25). If it is determined to be valid, the control unit 41 calculates the charge for the current process from the remaining amount. The remaining amount as a new usage result after deducting is calculated (ST26). At this time, the charge for the current process is specified by the operation panel 42, for example.
[0076]
Next, the control unit 41 supplies the remaining encoding information as a new usage record to the writing head 36 via the driver 46 (ST27).
As a result, the remaining amount as a new usage record is recorded on the read / write track 8 by the write head 36 (ST28).
[0077]
Thereafter, the controller 41 drives the transport mechanism 43 by the driver 44 to rotate the transport rollers 33,... In the reverse direction. As a result, the magnetic card 1 written by the write head 36 is transported to the insertion port 32 side by the transport path 34 (ST29).
[0078]
Next, the read / write track 8 is read by the reading head 35, and the read contents of the read / write track 8 are demodulated by the reading circuit 45 and supplied to the control unit 41 (ST30).
[0079]
As a result, the control unit 41 determines the legitimacy of the magnetic card 1 based on the coincidence of the read contents of the read / write track 8 with the recorded new usage record (ST31), and guides the normal process through the operation panel 42. The magnetic card 1 is discharged from the insertion slot 32 (ST32).
[0080]
Further, if the concealment information record is not confirmed in step 24, the validity of the basic issue information is not determined in step 25, the validity of the magnetic card 1 is not determined in step 31, The unit 41 guides through the operation panel 42 that the received magnetic card 1 is an abnormal ticket, and ejects the magnetic card 1 from the insertion slot 32 (ST33).
[0081]
The magnetic card processor 4 has substantially the same configuration as that of the magnetic card processor 3 shown in FIGS. 10 and 11 described above.
That is, a read head 51 is provided instead of the read head 35. The read head 51 has a wide magnetic gap width and a low sensitivity.
[0082]
Further, as shown in FIG. 13, a demodulation circuit 52 is provided instead of the reading circuit 45. The demodulating circuit 52 demodulates the encoded data read by the reading head 51, and the demodulated contents are output to the control unit 41.
[0083]
Next, the use process in the magnetic card processor 4 of the magnetic card 1 issued by the magnetic card issuer 2 will be described with reference to the flowchart shown in FIG.
[0084]
That is, when insertion of the magnetic card 1 from the insertion slot 32 is detected by a detector (not shown) (ST41), the controller 41 drives the transport mechanism 43 by the driver 44, thereby correcting the transport rollers 33,. Rotate in the direction. Thereby, the magnetic card 1 inserted from the insertion slot 32 is conveyed by the conveyance path 34 (ST42).
[0085]
Next, the magnetic card 1 is read by the read head 35. That is, the basic issuance information recorded on the one-time recording track 7 is read, and the read content is demodulated by the demodulation circuit 52 and supplied to the control unit 41 and recorded on the read / write track 8. Initial information is read, and the read content is demodulated by the demodulation circuit 52 and output to the control unit 41 (ST43).
[0086]
That is, when the one-time recording track 7 is read by the reading head 35 having a wide gap width, a signal corresponding to the encoded information of the basic issue information without causing waveform breakage as shown in FIG. A signal obtained by demodulating the waveform is output to the control unit 41.
[0087]
As a result, the control unit 41 determines basic issue information based on the demodulated signal from the demodulation circuit 52 (ST44).
In step 43, the usage record such as the remaining amount recorded on the high retention recording magnetic body 8b of the read / write track 8 is read, and the read contents are demodulated by the demodulation circuit 52 and sent to the control unit 41. Supplied.
[0088]
Next, the control unit 41 determines the validity of the basic issue information (ST45), and if it is determined to be valid, calculates the remaining amount as a new usage record obtained by subtracting the charge for the current process from the remaining amount (ST46). . At this time, the charge for the current process is specified by the operation panel 42, for example.
[0089]
Next, the control unit 41 supplies the remaining encoding information as a new usage record to the write head 36 via the driver 46 (ST47).
As a result, the remaining amount as a new usage record is recorded on the read / write track 8 by the write head 36 (ST48).
[0090]
Thereafter, the controller 41 drives the transport mechanism 43 by the driver 44 to rotate the transport rollers 33,... In the reverse direction. Thereby, the magnetic card 1 written by the write head 36 is conveyed to the insertion slot 32 side by the conveyance path 34 (ST49).
[0091]
Next, the read / write track 8 is read by the read head 35, and the read contents of the read / write track 8 are demodulated by the demodulation circuit 52 and supplied to the control unit 41 (ST50).
[0092]
As a result, the control unit 41 determines the legitimacy of the magnetic card 1 by matching the read contents of the read / write track 8 with the recorded new usage record (ST51), and guides normal processing through the operation panel 42. The magnetic card 1 is discharged from the insertion slot 32 (ST52).
[0093]
If the validity of the basic issue information is not determined in step 55, or if the validity of the magnetic card 1 is not determined in step 61, the control unit 41 indicates that the received magnetic card 1 is an abnormal ticket. Is guided by the operation panel 42, and the magnetic card 1 is discharged from the insertion slot 32 (ST53).
[0094]
As described above, in the magnetic card issued by the magnetic card issuing machine, the S magnetic material of the one-time recording track is recorded with a part erased with a remarkably high holding force and a part of the basic issuance information. The concealment information determined by the portion being recorded is recorded, the basic issuance information is recorded on the high-retention recording magnetic material, and when the issued magnetic card is processed in the security-compatible magnetic card processor (new) The pulse signal for each part of the S magnetic material of the one-time recording track and the pulse signal from the high magnetic recording material are extracted, and the recording of the concealment information is confirmed by the pulse signal from the S magnetic material. In the magnetic card processing machine (old) that does not support security, the basic issuance information is read by the pulse signal from the magnetic material. When processing de, S magnetic from the one-time recording track, it is obtained so as to read the basic issue information by encoding information obtained regardless of the high holding recording magnetic material.
[0095]
As a result, the above magnetic card can be handled by a security compatible magnetic card processing machine that prevents tampering and counterfeiting, and the magnetic card processing machine that is not security compatible can also handle the above magnetic card, It has compatibility.
[0096]
In the above-described embodiment, the case where the magnetic card processor 3 determines whether or not the magnetic card is counterfeited has been described based on whether or not the S signal is extracted. Whether the pattern (deletion pattern by a DC magnetic field: see X, Y, Z shown in FIG. 4F) matches the pattern stored in the memory in advance by the pulse signal generated by the S signal. Alternatively, it may be determined whether the magnetic card is counterfeit. In this case, the pattern may be determined based on an issue date, a ticket number, or the like.
[0097]
Further, in the above-described embodiment, the case where the magnetic layer formed by mixing the high-retention recording magnetic material and the S magnetic material over the entire surface of the magnetic card on the base layer has been described in the magnetic card. However, the present invention is not limited to this, and the high retention recording magnetic body and the S magnetic body may be applied in a two-layer structure over the entire surface of the magnetic card on the base layer.
[0098]
In this case, the issuing process shown in FIG. 9 and the use processes shown in FIGS.
Further, data is partially recorded on the S magnetic body and the high retention recording magnetic body of the one-time recording track, and a signal waveform by the high retention recording magnetic body as a read signal and a signal waveform by the S magnetic body with a delay of the difference time. 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. . In other words, the residual magnetic flux due to the S magnetic material and the residual magnetic flux due to the high-retention recording magnetic material are made to have a difference so as to have specificity. In this case, by taking into account the difference in the peak value of the read voltage, advanced tampering and forgery prevention can be achieved.
[0099]
In this case, the two read voltages of the N signal and the S signal are compared by the peak value obtained by converting them by the A / D converter.
Further, the case where the encryption key is recorded on the S magnetic body and the encrypted data is recorded on the high retention recording magnetic body has been described. However, the present invention is not limited to this, and concealment information is recorded on the S magnetic body. Even when the secret information is recorded on the high-retention recording magnetic body, the same operation as described above can be performed. In this case, the decryption unit is unnecessary, and only the pulse signal based on the recording waveform in the high-retention recording magnetic material is extracted by removing the pulse signal due to the recording waveform in the S magnetic material by the N signal extraction unit. Can be taken out.
[0100]
【The invention's effect】
As described above in detail, according to the present invention, a signal recorded by a new processing method can be demodulated by a conventional magnetic card processor, and a compatible magnetic card processing system can be provided.
[Brief description of the drawings]
FIG. 1 is a diagram showing an outline of a magnetic card processing system for explaining an embodiment of the present invention.
FIG. 2 is a cross-sectional view showing a schematic configuration of a magnetic card.
FIG. 3 is a perspective view for explaining a track configuration of a magnetic card.
FIG. 4 is a diagram for explaining a relationship among a DC magnetic field at the time of issuance in a one-time recording track, an erased state, encoded information, a recorded state of encoded information, a reproduction waveform, and concealment information.
FIG. 5 is a cross-sectional view showing a configuration of a main part of a magnetic card issuing machine.
FIG. 6 is a block diagram showing a configuration of a control circuit of the magnetic card issuer.
FIG. 7 is a diagram for explaining signal waveforms of respective units in the reading circuit.
FIG. 8 is a diagram for explaining a relationship of a difference time T0 with respect to a conveyance speed for conveying a magnetic card.
FIG. 9 is a flowchart for explaining magnetic card issuance processing;
FIG. 10 is a cross-sectional view showing a configuration of a main part of a magnetic card processing machine.
FIG. 11 is a block diagram showing a configuration of a control circuit of the magnetic card processor.
FIG. 12 is a flowchart for explaining processing of using a magnetic card.
FIG. 13 is a block diagram showing a configuration of a control circuit of the magnetic card processor.
FIG. 14 is a flowchart for explaining use processing of a magnetic card.
[Explanation of symbols]
1 ... Magnetic head
2 ... Magnetic card issuing machine
3, 4 ... Magnetic card processor
5 ... Base layer
6 ... Magnetic layer
7 ... One-time recording track (issue information track)
8 ... Read / write track (used track)
7a, 8a ... S magnetic material
7b, 8b ... high retention recording magnetic material
14 ... Conveying path
16, 17 ... writing head
18 ... Reading head
21, 41 ... control unit
22, 42 ... Operation panel
23, 43 ... Conveyance mechanism
24, 25, 25, 26, 26, 44, 46 ... Driver
27, 45 ... Read circuit
27a, 45a ... Peak detector
27b, 45b ... Window signal output section
27c, 45c ... delay circuit
27d, 45d ... N signal extraction unit
27e, 45e ... S signal extraction unit
51 ... Reading head
52. Demodulation circuit

Claims (4)

A magnetic layer comprising a first magnetic body that records and retains recorded content at a high level, and a second magnetic body that is initially set at a low holding force and has a characteristic that the holding force is significantly increased once exposed to a magnetic field. In a magnetic card processing system comprising a magnetic card issuing machine that issues a magnetic card, and first and second magnetic card processing machines that process the magnetic card issued by the magnetic card issuing machine,
The above magnetic card issuing machine
Recording means for recording basic issue information on the first magnetic body of the magnetic layer of the magnetic card and recording concealment information on the second magnetic body;
The first magnetic card processor is
First reading means for reading basic issuance information recorded on the first magnetic body of the magnetic layer of the magnetic card and concealment information recorded on the second magnetic body;
Separating means for separating the basic issue information and concealment information read by the first reading means;
First determination means for determining forgery of the magnetic card depending on whether or not the concealment information is separated by the separation means;
When the first determination means determines that the magnetic card is not counterfeit, the second determination means determines the validity of the magnetic card based on the basic issuance information separated by the separation means.
The second magnetic card processor is
Second reading means for reading basic issuance information recorded on the first magnetic body of the magnetic layer of the magnetic card;
A third determination unit that determines the validity of the magnetic card based on the basic issuance information read by the second reading unit;
A magnetic card processing system. A magnetic layer comprising a first magnetic body that records and retains recorded content at a high level, and a second magnetic body that is initially set at a low holding force and has a characteristic that the holding force is significantly increased once exposed to a magnetic field. In a magnetic card processing system comprising a magnetic card issuing machine that issues a magnetic card, and first and second magnetic card processing machines that process the magnetic card issued by the magnetic card issuing machine,
The above magnetic card issuing machine
Recording means for recording basic issue information on the first magnetic body of the magnetic layer of the magnetic card and recording concealment information on the second magnetic body;
The first magnetic card processor is
Using the first magnetic head having a predetermined magnetic gap width, the basic issue information recorded on the first magnetic body of the magnetic layer of the magnetic card and the concealment information recorded on the second magnetic body are used. First reading means for reading,
Separating means for separating the basic issue information and concealment information read by the first reading means;
First determination means for determining forgery of the magnetic card depending on whether or not the concealment information is separated by the separation means;
When the first determination means determines that the magnetic card is not counterfeit, the second determination means determines the validity of the magnetic card based on the basic issuance information separated by the separation means.
The second magnetic card processor is
The basic issue information recorded on the first magnetic body of the magnetic layer of the magnetic card is read using a second magnetic head having a magnetic gap width larger than the magnetic gap width of the first magnetic head. Two reading means;
A third determination unit that determines the validity of the magnetic card based on the basic issuance information read by the second reading unit;
A magnetic card processing system. A magnetic layer comprising a first magnetic body that records and retains recorded content at a high level, and a second magnetic body that is initially set at a low holding force and has a characteristic that the holding force is significantly increased once exposed to a magnetic field. In a magnetic card processing system comprising a magnetic card issuing machine that issues a magnetic card, and first and second magnetic card processing machines that process the magnetic card issued by the magnetic card issuing machine,
The above magnetic card issuing machine
Recording means for recording basic issuance information on the first magnetic body of the magnetic layer of the magnetic card and recording concealment information of a predetermined pattern on the second magnetic body;
The first magnetic card processor is
First reading means for reading basic issuance information recorded on the first magnetic body of the magnetic layer of the magnetic card and concealment information recorded on the second magnetic body;
Separating means for separating the basic issue information and concealment information read by the first reading means;
First determination means for determining forgery of the magnetic card according to whether or not the pattern of concealment information separated by the separation means matches a predetermined pattern;
When the first determination means determines that the magnetic card is not counterfeit, the second determination means determines the validity of the magnetic card based on the basic issuance information separated by the separation means.
The second magnetic card processor is
Second reading means for reading basic issuance information recorded on the first magnetic body of the magnetic layer of the magnetic card;
A third determination unit that determines the validity of the magnetic card based on the basic issuance information read by the second reading unit;
A magnetic card processing system. A magnetic layer comprising a first magnetic body that records and retains recorded content at a high level, and a second magnetic body that is initially set at a low holding force and has a characteristic that the holding force is significantly increased once exposed to a magnetic field. In a magnetic card processing system comprising a magnetic card issuing machine that issues a magnetic card, and first and second magnetic card processing machines that process the magnetic card issued by the magnetic card issuing machine,
The above magnetic card issuing machine
Recording means for recording basic issuance information on the first magnetic body of the magnetic layer of the magnetic card and recording concealment information of a predetermined pattern on the second magnetic body;
The first magnetic card processor is
Using the first magnetic head having a predetermined magnetic gap width, the basic issue information recorded on the first magnetic body of the magnetic layer of the magnetic card and the concealment information recorded on the second magnetic body are used. First reading means for reading,
Separating means for separating the basic issue information and concealment information read by the first reading means;
First determination means for determining forgery of the magnetic card according to whether or not the pattern of concealment information separated by the separation means matches a predetermined pattern;
When the first determination means determines that the magnetic card is not counterfeit, the second determination means determines the validity of the magnetic card based on the basic issuance information separated by the separation means.
The second magnetic card processor is
The basic issue information recorded on the first magnetic body of the magnetic layer of the magnetic card is read using a second magnetic head having a magnetic gap width larger than the magnetic gap width of the first magnetic head. Two reading means;
A third determination unit that determines the validity of the magnetic card based on the basic issuance information read by the second reading unit;
A magnetic card processing system.

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