CA1305793C - Magnetic recording medium and method for ascertaining authenticity of thesame - Google Patents
Magnetic recording medium and method for ascertaining authenticity of thesameInfo
- Publication number
- CA1305793C CA1305793C CA000564643A CA564643A CA1305793C CA 1305793 C CA1305793 C CA 1305793C CA 000564643 A CA000564643 A CA 000564643A CA 564643 A CA564643 A CA 564643A CA 1305793 C CA1305793 C CA 1305793C
- Authority
- CA
- Canada
- Prior art keywords
- magnetic
- card
- recording medium
- verification
- ascertaining
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000005291 magnetic effect Effects 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000012795 verification Methods 0.000 claims abstract description 37
- 230000005540 biological transmission Effects 0.000 claims abstract description 17
- 239000000463 material Substances 0.000 claims abstract description 14
- 239000000696 magnetic material Substances 0.000 claims abstract description 12
- 230000000875 corresponding effect Effects 0.000 claims description 3
- 230000035699 permeability Effects 0.000 claims description 2
- 238000005259 measurement Methods 0.000 description 4
- 239000004800 polyvinyl chloride Substances 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 239000005020 polyethylene terephthalate Substances 0.000 description 3
- 229920000915 polyvinyl chloride Polymers 0.000 description 3
- 238000004080 punching Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 101000760620 Homo sapiens Cell adhesion molecule 1 Proteins 0.000 description 1
- 101000911772 Homo sapiens Hsc70-interacting protein Proteins 0.000 description 1
- 101001139126 Homo sapiens Krueppel-like factor 6 Proteins 0.000 description 1
- 101000710013 Homo sapiens Reversion-inducing cysteine-rich protein with Kazal motifs Proteins 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
- WJZHMLNIAZSFDO-UHFFFAOYSA-N manganese zinc Chemical compound [Mn].[Zn] WJZHMLNIAZSFDO-UHFFFAOYSA-N 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 229910000702 sendust Inorganic materials 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/08—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code using markings of different kinds or more than one marking of the same kind in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means
- G06K19/10—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code using markings of different kinds or more than one marking of the same kind in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means at least one kind of marking being used for authentication, e.g. of credit or identity cards
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Recording Or Reproducing By Magnetic Means (AREA)
- Magnetic Record Carriers (AREA)
- Credit Cards Or The Like (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE:
A magnetic recording medium, in a magnetic recording medium whose base material is provided with a magnetic data portion, is disclosed which comprises, at least, a first verification portion having a desired light transmission coefficient and a second verification portion formed of mag-netic material arranged separately from the magnetic data portion. A method for ascertaining authenticity of the mag-netic recording medium is also disclosed which comprises the steps of detecting the light transmission coefficient at the first verification portion thereby to verify the base material of *he recording medium and detecting the magnetic material at the second verification portion thereby to detect the class of the same.
A magnetic recording medium, in a magnetic recording medium whose base material is provided with a magnetic data portion, is disclosed which comprises, at least, a first verification portion having a desired light transmission coefficient and a second verification portion formed of mag-netic material arranged separately from the magnetic data portion. A method for ascertaining authenticity of the mag-netic recording medium is also disclosed which comprises the steps of detecting the light transmission coefficient at the first verification portion thereby to verify the base material of *he recording medium and detecting the magnetic material at the second verification portion thereby to detect the class of the same.
Description
The present invention relates to a magnetic recording medium and a method for ascertaining authenticity of the same and more particularly to enhancement of the security.
The present invention is applicable to magnetic recording media such as magnetic cards which require to b~
provided with means for preventing dishonest use and forgery or falsification thereof.
Since the magnetic cards such as prepaid cards are handy to carry and very useful today, their distributions among the market are more and more growing.
On the other hand, it is presumed that the magnetic cards are forged and used wrongfully, and therefore, it is reguired that some countermeasures should be taken.
As one of the countermeasures, conventional magnetic cards have been discriminating between genuine cards and spurious ones by such methods as reading data or magnetic bar code with the use of a reader/writer, and detection of a ~ punched hole.
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In order to prevent forgery or falsification of the cards, it is of course necessary to keep the method for ascertaining their authenticity confidential, but in addition thereto, it is necessary to discourage dishonest users from committing forgery. In this regard, the security measures ~25 provided for~the conventional cards have been insufficient.
The present invention provides a magnetic recording medium as well as a method;for ascertaining the authenticity ~` of the same adapted such that forgery or falsification of the : ~-recording medium is practically impossible because of its requiring procedures of much enhanced complexity.
The present invention provides in a ]maynetic recording medium whose base material is provided with a magnetic data portion, comprises, at least, a first verification portion having a desired light transmission coefficient and a second verification portion formed of magnetic material arranged separately fro~ the magnetic data portion.
And, the method for ascertaining authenticity of the magnetic recording medium according to the present invention comprises the steps of detecting the light transmission coef*icient at the first verification portion thereby to verify the base material of the recording medium and detecting the magnetic material at the second verification portion thereby to detect the class of the same.
Fig. lA is a schematic plan view of an emhodiment of a magnetic recording medium according to the present invention, Fig. lB is an enlarged schematic Vi2W of a verification portion of the class of card, Fig. lC is a cross-sectional view taken along line I - I of Fig. lA;
Fig. 2 is a schematic block diagram of an apparatus utilizing an embodiment of a method for ascertaining the authenticity according to the present invention;
Fig. 3 is a flow chart showing operation of the ; aforesaid apparatus ~or ascertaining authenticity at the time of issuance of a card; and :
31 31~S~3~3 Fig. 4 is a flow chart showing operations of the aforesaid apparatus for ascertaining authenticity at the time of use of a card.
An embodiment of the present invention will be described below in detail with reference to accompanying drawings.
Fig. lA is a schematic plan view of an embodiment of a magnetic recording medium according to the present invention, Fig. lB is an enlarged schematic view of its verification portion of the class of card, and Fig. lC is a cross-sectional view taken along line I ~ I of Fig. lA.
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:~ , `` ~3Q5'7~3 As shown in Fig. lA, a magnetic card 1 of the present embodiment is provided wi-th a magnetic stripe 2 for recording therein magnetic data, a verification portion 3 for discrimi-nating the class of card magnetically, a verification portion 4 for verifying base material of the card through measurement of its light transmission coefficient, and a verification por-tion 5 for verifying the used condition of the card according to detection of a punched hole.
As the verification portion 3, a magnetic bar code system using magnetic material of high permeability was employed to increase the difficulty of forgery or falsification of the card, because this bar code wi].l neither be made visual by a magnetic reader on the market nor be caused to provide any output by an ordinary magnetic card reader. A magnetic head, for example, with a DC bias applied thereto is required to read the bar code.
,, The magnetic bar code portion 3 is formed in the portion indlcating the directlon in which the card is to be inserted.
As the material of high perme~abili-ty 1s used such as iron, manganese zinc f~errite, magnetite, or sendust. The security can further be enhance~d if ordinary magnetic materials are properly used in~the bar code.
In the present case, the magnetic bar code is representa-.
tive of the class of;card,~i.e., Yl,000-card, ~3,000-card, etc.
The base material of the magnetic card 1 is of such a ~'~
' structure that a sheet of non-woven fabric 11 is sandwiched between white polyvinyl chloride (PVC) sheets 12, 13 as shown in Fig. lC. The thickness of the PVC is 80 - 100 ~m. Poly-ethylene terephthalate (PET) may be used instead of PVC. it is also possible to have long fibers kneaded into PVC or PET
when the base material is produced.
~ uch a base material is irradiated by light emitted from a light source such as an 1ED and the transmitted light through the base material is measured by a photodetector device. Since the measurement value varies with the individual card, the data can be used for ascertaininy the au-thenticity of the card.
The verification portion 4 is provided for such measurement for verification.
~; The aforesaid base material can be provided with fibrous meshes so tha-t its light transmission coefficient may be varied.
; As discussed~later, although the cer-tainty in the verifi-cation is greatly enhanced by the provision of the aforesaid verification portions 3 and 4, the present embodiment is also provided with the verification portion 5 for further improving the certainty.
As the verification portion 5, a punched hole system is employed in which the used condition (e.g., whether it is used up or still usable and the balance) of the card 1 is represented by punched holes made therein. The magnetic layer of the veri-fication portion 5 may be arranged in the interior of the ~ .
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~3~ 3 sheet 1~.
The used condltion at the time ~hen a card is issued as a new card is indicated by only one punched hole made in the verification portion 5, and as the card is -then used, the condition is indicated by other punched holes~:made correspond-ing to the amount of the balance or the like. On the side of the apparatus for reading the card, the punched holes are detected optically or magnetically, and the autllenticity is ascertained by checking up the detected result wi-th the data from the magnetic stripe.
Inciden-tally, such a method may also be used not to make the punched hole at the time of issuance of the card but to make the punched holes after the card has been put to use according to the balance or the like. Or, a method not making ~ any punched hole may be used.
~ : It is preferred that the verification portion 4 is dis-posed close to the punched hole, because even iE a dishonest user devises not to have the punched hole made, the light transmission coefficient of the verification por-tion 4 is thereby changed and the fact of dishonest use can be detected.
~ Fur-ther, such arrangemen-t is also possible to locate the ; position of rneasurement of the light transmission coefficient of the verification portion 4 at a predetermined distance from the punched hole at the time of use of the card (i.e., the measurement position of the llght transmission coefficient is ~ t7~
changed at the time each punched hole is made). ~y so doing, the measuremen-t position of the verification portion 4 may be changed, and it will make the forgery or falsification of the card fur-ther diEficult.
Fig. 2 is a schematic block diagram of -the apparatus utilizing an e~bodimen-t of the method of ascertaining the authenticity according to the present invention.
Referring to the figure, the present apparatus is provided with a photoelectric converter 21 for measuring light trans-mission coefficient of the card 1, a punched hole punch 22 for punching the card 1, a magne-tic data check head a, a magnetic data read head b, a magnetic data write head c, and a magnetic data erase head d.
The measured data by the photoelectric converter 21 are converted into digital form by an A/D converter 23 and input to a signal processing unit 24. And, a signal of the magnetic bar code and a signal of the punched hole read by the magnetic head a are input through a waveform shaper 26 to the signal processing unit 24.
Magnetic data read out of the magnetic stripe 2 by the magnetic head b are input through a waveform shaper 27 to the signal processing unit 24. Thereby, data for ascertaining authenticity in the magnetic data are checked up wi-th verifi-cation data of th~e aforesaid light transmission coefficient, bar code, and the punched hole to ascertain the authenticity ~3Q~'7~
of the card 1. A memory unit 25 is used for the purpose of s-toring da-ta and the like at that time.
R/W data control portion includes, in addition to the signal processing unit 24 and the memory unit 25, an input portion 30 for inputting necessary data, the fare, etc. and a display portion 31 for displaying pxedetermined procedures and other necessary messages.
The write head c is driven by a slgnal delivered from the signal processing unit 24 through a waveform shaper 28 and the erase head d is driven by one through an erase signal processor 29. V1 denotes a power source for the hole punching, V2 denotes a power source for -the photoelectric conver-ter 21, V3 denotes a power source for driving the signal processing unit, V4 denotes a~power source for the erase head, and G
;~ denotes ground.
Fig. 3 is a flow chart showing operations of the aforesaid apparatus or ascertaining authenticity at the time of issuance ~ of a card.
; ~ ~ Firstly, as a~card l is inserted into the present apparatus (Sl),~the magne~tlc bar code data (data of the class of card) lS read by the magnetic head a and stored in the memory 25 connected to the signal processlng unit 24 (S2). Then, light transmissIon coeficient of a portion at a specified position withln the verification portlon 4 is measured and the data is stored in the memor~ 25 (S3).
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Then, the da-ta Eor ascertaining the authen-ticity stored in the memory 25 are encoded onto the magnetic stripe 2 (MT) of the card 1 (S4), whereupon the data in the memory 25 and the encoded data on the magnetic stripe 2 (MT) are compared for checking whe-ther or not they ~re in conformity with each other.
If affirmative (Y at S5), a punched hole is made to indicate issuance of the card ~S6), a display is made to the effect (S7), and the card is issued ~S8).
If -the checking process (S5) results in an error, a dis-play is made to the effec-t (59), and a process for nullifying the card is performed by punching the card a-t the magnetic stripe 2 (MT) (S10).
When the method is used i.n which a punched hole is no-t made at the time of issuance of the card, the process at S6 is omltted.
Fig. 4 is a flow chart showing operations of the apparatus for ascertaining -the authenticity at the time the card is used.
Firstly, as the card 1 ls inserted by its owner into the present apparatus (ST1), the apparatus detects the verification port~,ons 3, 4 and 5 of the card. That is, the light trans-mlssion coefficient~of the card base material is measured by the photoelectric converter 21 (ST2), and the punch hole and the bar code are detected by the magnetic head a (ST3, ST4).
These detected data are stored by the signal processing ùnit 24 ~::
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in the memory 25.
Then, the magne-tic data in the magnetlc stripe 2 (MT) are read by the magnetic head b (ST5). Thereupon, -the da-ta stored in the memory 25 and the magnetic data read out of the magne-tic stripe 2 are checked up wi-th each o~her (ST6 - ST8).
Thus, checkups are given to the light transmission coeffi-cient at a specified position (ST6) and to the position of the punched hole and the class of card according to the bar code detected by the magnetic head a (ST7 and ST8).
If the data are not in conformity with each other at any one of the checking up processes ST6 - ST8, the card is not considered to be authentic, an error display is made (~T9), and the process to nullify the card is performed (ST10).
; When the card is judged authentic as the result of the checkups at ST6 - STa proving all the data to be in conformity, ; a dlsplay is made prompting the user to input a necessary amount (e.g., of the fare), whereby the amount is input ~ST11).
The signal processing unit 24 compares the input amoun-t and the balance of the card lST12), and necessary processing is made when the balance is larger than -the input amount (ST13).
In succession thereto, such data~as the balance a~ter the aforesald processing has been made are recorded in the magnetic stripe 2 by the magnetic head c (ST14), and a punched hole is made in the position corresponding to the balance by the punched hole punch 22 (ST15). Thereupon, a display is made ~ .
lndi.cati.ng that thc -transac-tion is complcted (STl.6) and the card 1 is returned (ST17).
On the other hand, if the balance is insufficient at ST12, a display -to that effect is made (STl8) to promp-t the user to make up for the deficiency. If the amount of money covering the shortage is inserted (ST19), a nécessary process is performed (ST20), and the data are all turned to "l" and recorded in the magnetic stripe 2 (ST21). Thereafter, a punched hole is made in the card indicating that the card is used up (ST22) and thc c~rd i9 returned (ST23).
As described so far, in the magnetic recording medium and the method for ascertaining its authenticity accordi.ng to the present invention, the verification is executed by detection of at least both the light transmission coefficient and the arrangement of magnetic material. Therefore, even if forgery or falsification of the card is attempted, the complexity of procedures to commit that is gretly enhanced as compared wi~th that for the card theretofore in use, and it is made practically impossible to commit that. Thus, the security is greatly improved.
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The present invention is applicable to magnetic recording media such as magnetic cards which require to b~
provided with means for preventing dishonest use and forgery or falsification thereof.
Since the magnetic cards such as prepaid cards are handy to carry and very useful today, their distributions among the market are more and more growing.
On the other hand, it is presumed that the magnetic cards are forged and used wrongfully, and therefore, it is reguired that some countermeasures should be taken.
As one of the countermeasures, conventional magnetic cards have been discriminating between genuine cards and spurious ones by such methods as reading data or magnetic bar code with the use of a reader/writer, and detection of a ~ punched hole.
'~ :
In order to prevent forgery or falsification of the cards, it is of course necessary to keep the method for ascertaining their authenticity confidential, but in addition thereto, it is necessary to discourage dishonest users from committing forgery. In this regard, the security measures ~25 provided for~the conventional cards have been insufficient.
The present invention provides a magnetic recording medium as well as a method;for ascertaining the authenticity ~` of the same adapted such that forgery or falsification of the : ~-recording medium is practically impossible because of its requiring procedures of much enhanced complexity.
The present invention provides in a ]maynetic recording medium whose base material is provided with a magnetic data portion, comprises, at least, a first verification portion having a desired light transmission coefficient and a second verification portion formed of magnetic material arranged separately fro~ the magnetic data portion.
And, the method for ascertaining authenticity of the magnetic recording medium according to the present invention comprises the steps of detecting the light transmission coef*icient at the first verification portion thereby to verify the base material of the recording medium and detecting the magnetic material at the second verification portion thereby to detect the class of the same.
Fig. lA is a schematic plan view of an emhodiment of a magnetic recording medium according to the present invention, Fig. lB is an enlarged schematic Vi2W of a verification portion of the class of card, Fig. lC is a cross-sectional view taken along line I - I of Fig. lA;
Fig. 2 is a schematic block diagram of an apparatus utilizing an embodiment of a method for ascertaining the authenticity according to the present invention;
Fig. 3 is a flow chart showing operation of the ; aforesaid apparatus ~or ascertaining authenticity at the time of issuance of a card; and :
31 31~S~3~3 Fig. 4 is a flow chart showing operations of the aforesaid apparatus for ascertaining authenticity at the time of use of a card.
An embodiment of the present invention will be described below in detail with reference to accompanying drawings.
Fig. lA is a schematic plan view of an embodiment of a magnetic recording medium according to the present invention, Fig. lB is an enlarged schematic view of its verification portion of the class of card, and Fig. lC is a cross-sectional view taken along line I ~ I of Fig. lA.
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:~ , `` ~3Q5'7~3 As shown in Fig. lA, a magnetic card 1 of the present embodiment is provided wi-th a magnetic stripe 2 for recording therein magnetic data, a verification portion 3 for discrimi-nating the class of card magnetically, a verification portion 4 for verifying base material of the card through measurement of its light transmission coefficient, and a verification por-tion 5 for verifying the used condition of the card according to detection of a punched hole.
As the verification portion 3, a magnetic bar code system using magnetic material of high permeability was employed to increase the difficulty of forgery or falsification of the card, because this bar code wi].l neither be made visual by a magnetic reader on the market nor be caused to provide any output by an ordinary magnetic card reader. A magnetic head, for example, with a DC bias applied thereto is required to read the bar code.
,, The magnetic bar code portion 3 is formed in the portion indlcating the directlon in which the card is to be inserted.
As the material of high perme~abili-ty 1s used such as iron, manganese zinc f~errite, magnetite, or sendust. The security can further be enhance~d if ordinary magnetic materials are properly used in~the bar code.
In the present case, the magnetic bar code is representa-.
tive of the class of;card,~i.e., Yl,000-card, ~3,000-card, etc.
The base material of the magnetic card 1 is of such a ~'~
' structure that a sheet of non-woven fabric 11 is sandwiched between white polyvinyl chloride (PVC) sheets 12, 13 as shown in Fig. lC. The thickness of the PVC is 80 - 100 ~m. Poly-ethylene terephthalate (PET) may be used instead of PVC. it is also possible to have long fibers kneaded into PVC or PET
when the base material is produced.
~ uch a base material is irradiated by light emitted from a light source such as an 1ED and the transmitted light through the base material is measured by a photodetector device. Since the measurement value varies with the individual card, the data can be used for ascertaininy the au-thenticity of the card.
The verification portion 4 is provided for such measurement for verification.
~; The aforesaid base material can be provided with fibrous meshes so tha-t its light transmission coefficient may be varied.
; As discussed~later, although the cer-tainty in the verifi-cation is greatly enhanced by the provision of the aforesaid verification portions 3 and 4, the present embodiment is also provided with the verification portion 5 for further improving the certainty.
As the verification portion 5, a punched hole system is employed in which the used condition (e.g., whether it is used up or still usable and the balance) of the card 1 is represented by punched holes made therein. The magnetic layer of the veri-fication portion 5 may be arranged in the interior of the ~ .
::
~3~ 3 sheet 1~.
The used condltion at the time ~hen a card is issued as a new card is indicated by only one punched hole made in the verification portion 5, and as the card is -then used, the condition is indicated by other punched holes~:made correspond-ing to the amount of the balance or the like. On the side of the apparatus for reading the card, the punched holes are detected optically or magnetically, and the autllenticity is ascertained by checking up the detected result wi-th the data from the magnetic stripe.
Inciden-tally, such a method may also be used not to make the punched hole at the time of issuance of the card but to make the punched holes after the card has been put to use according to the balance or the like. Or, a method not making ~ any punched hole may be used.
~ : It is preferred that the verification portion 4 is dis-posed close to the punched hole, because even iE a dishonest user devises not to have the punched hole made, the light transmission coefficient of the verification por-tion 4 is thereby changed and the fact of dishonest use can be detected.
~ Fur-ther, such arrangemen-t is also possible to locate the ; position of rneasurement of the light transmission coefficient of the verification portion 4 at a predetermined distance from the punched hole at the time of use of the card (i.e., the measurement position of the llght transmission coefficient is ~ t7~
changed at the time each punched hole is made). ~y so doing, the measuremen-t position of the verification portion 4 may be changed, and it will make the forgery or falsification of the card fur-ther diEficult.
Fig. 2 is a schematic block diagram of -the apparatus utilizing an e~bodimen-t of the method of ascertaining the authenticity according to the present invention.
Referring to the figure, the present apparatus is provided with a photoelectric converter 21 for measuring light trans-mission coefficient of the card 1, a punched hole punch 22 for punching the card 1, a magne-tic data check head a, a magnetic data read head b, a magnetic data write head c, and a magnetic data erase head d.
The measured data by the photoelectric converter 21 are converted into digital form by an A/D converter 23 and input to a signal processing unit 24. And, a signal of the magnetic bar code and a signal of the punched hole read by the magnetic head a are input through a waveform shaper 26 to the signal processing unit 24.
Magnetic data read out of the magnetic stripe 2 by the magnetic head b are input through a waveform shaper 27 to the signal processing unit 24. Thereby, data for ascertaining authenticity in the magnetic data are checked up wi-th verifi-cation data of th~e aforesaid light transmission coefficient, bar code, and the punched hole to ascertain the authenticity ~3Q~'7~
of the card 1. A memory unit 25 is used for the purpose of s-toring da-ta and the like at that time.
R/W data control portion includes, in addition to the signal processing unit 24 and the memory unit 25, an input portion 30 for inputting necessary data, the fare, etc. and a display portion 31 for displaying pxedetermined procedures and other necessary messages.
The write head c is driven by a slgnal delivered from the signal processing unit 24 through a waveform shaper 28 and the erase head d is driven by one through an erase signal processor 29. V1 denotes a power source for the hole punching, V2 denotes a power source for -the photoelectric conver-ter 21, V3 denotes a power source for driving the signal processing unit, V4 denotes a~power source for the erase head, and G
;~ denotes ground.
Fig. 3 is a flow chart showing operations of the aforesaid apparatus or ascertaining authenticity at the time of issuance ~ of a card.
; ~ ~ Firstly, as a~card l is inserted into the present apparatus (Sl),~the magne~tlc bar code data (data of the class of card) lS read by the magnetic head a and stored in the memory 25 connected to the signal processlng unit 24 (S2). Then, light transmissIon coeficient of a portion at a specified position withln the verification portlon 4 is measured and the data is stored in the memor~ 25 (S3).
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Then, the da-ta Eor ascertaining the authen-ticity stored in the memory 25 are encoded onto the magnetic stripe 2 (MT) of the card 1 (S4), whereupon the data in the memory 25 and the encoded data on the magnetic stripe 2 (MT) are compared for checking whe-ther or not they ~re in conformity with each other.
If affirmative (Y at S5), a punched hole is made to indicate issuance of the card ~S6), a display is made to the effect (S7), and the card is issued ~S8).
If -the checking process (S5) results in an error, a dis-play is made to the effec-t (59), and a process for nullifying the card is performed by punching the card a-t the magnetic stripe 2 (MT) (S10).
When the method is used i.n which a punched hole is no-t made at the time of issuance of the card, the process at S6 is omltted.
Fig. 4 is a flow chart showing operations of the apparatus for ascertaining -the authenticity at the time the card is used.
Firstly, as the card 1 ls inserted by its owner into the present apparatus (ST1), the apparatus detects the verification port~,ons 3, 4 and 5 of the card. That is, the light trans-mlssion coefficient~of the card base material is measured by the photoelectric converter 21 (ST2), and the punch hole and the bar code are detected by the magnetic head a (ST3, ST4).
These detected data are stored by the signal processing ùnit 24 ~::
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in the memory 25.
Then, the magne-tic data in the magnetlc stripe 2 (MT) are read by the magnetic head b (ST5). Thereupon, -the da-ta stored in the memory 25 and the magnetic data read out of the magne-tic stripe 2 are checked up wi-th each o~her (ST6 - ST8).
Thus, checkups are given to the light transmission coeffi-cient at a specified position (ST6) and to the position of the punched hole and the class of card according to the bar code detected by the magnetic head a (ST7 and ST8).
If the data are not in conformity with each other at any one of the checking up processes ST6 - ST8, the card is not considered to be authentic, an error display is made (~T9), and the process to nullify the card is performed (ST10).
; When the card is judged authentic as the result of the checkups at ST6 - STa proving all the data to be in conformity, ; a dlsplay is made prompting the user to input a necessary amount (e.g., of the fare), whereby the amount is input ~ST11).
The signal processing unit 24 compares the input amoun-t and the balance of the card lST12), and necessary processing is made when the balance is larger than -the input amount (ST13).
In succession thereto, such data~as the balance a~ter the aforesald processing has been made are recorded in the magnetic stripe 2 by the magnetic head c (ST14), and a punched hole is made in the position corresponding to the balance by the punched hole punch 22 (ST15). Thereupon, a display is made ~ .
lndi.cati.ng that thc -transac-tion is complcted (STl.6) and the card 1 is returned (ST17).
On the other hand, if the balance is insufficient at ST12, a display -to that effect is made (STl8) to promp-t the user to make up for the deficiency. If the amount of money covering the shortage is inserted (ST19), a nécessary process is performed (ST20), and the data are all turned to "l" and recorded in the magnetic stripe 2 (ST21). Thereafter, a punched hole is made in the card indicating that the card is used up (ST22) and thc c~rd i9 returned (ST23).
As described so far, in the magnetic recording medium and the method for ascertaining its authenticity accordi.ng to the present invention, the verification is executed by detection of at least both the light transmission coefficient and the arrangement of magnetic material. Therefore, even if forgery or falsification of the card is attempted, the complexity of procedures to commit that is gretly enhanced as compared wi~th that for the card theretofore in use, and it is made practically impossible to commit that. Thus, the security is greatly improved.
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Claims (3)
1. In a magnetic recording medium whose base material is provided with a magnetic data portion, said magnetic recording medium comprising, at least;
a first verification portion having a desired light transmission coefficient; and a second verification portion formed of magnetic material arranged separately from said magnetic data portion.
a first verification portion having a desired light transmission coefficient; and a second verification portion formed of magnetic material arranged separately from said magnetic data portion.
2. A magnetic recording medium according to claim 1, wherein the magnetic material of said second verification portion is a high permeability magnetic material and is encoded corres-ponding to the class of said magnetic recording medium.
3. A method for ascertaining authenticity of a magnetic recording medium, which has, at least, a first verification portion with a desired light transmission coefficient and a second verification portion formed of magnetic material arranged separately from a magnetic data portion, comprising the steps of:
detecting the light transmission coefficient at the first verification portion thereby to verify the base material of the recording medium; and detecting the magnetic material at the second verification portion thereby to detect the class of the same.
detecting the light transmission coefficient at the first verification portion thereby to verify the base material of the recording medium; and detecting the magnetic material at the second verification portion thereby to detect the class of the same.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62096268A JPH083898B2 (en) | 1987-04-21 | 1987-04-21 | Magnetic recording medium and its authenticity determination method |
| JP96268/1987 | 1987-04-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1305793C true CA1305793C (en) | 1992-07-28 |
Family
ID=14160405
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000564643A Expired - Lifetime CA1305793C (en) | 1987-04-21 | 1988-04-20 | Magnetic recording medium and method for ascertaining authenticity of thesame |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPH083898B2 (en) |
| KR (1) | KR890700878A (en) |
| AU (1) | AU1592088A (en) |
| CA (1) | CA1305793C (en) |
| WO (1) | WO1988008591A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0776981B2 (en) * | 1989-11-02 | 1995-08-16 | 株式会社日本コンラックス | Card-type recording medium recording / reproducing apparatus and method for preventing unauthorized use thereof |
| US5270526A (en) * | 1989-11-02 | 1993-12-14 | Nippon Conlux Co., Ltd. | Card type recording medium and method of preventing a false use thereof |
| CN102446525B (en) * | 2010-09-30 | 2015-04-22 | 山东新北洋信息技术股份有限公司 | Magnetic recording method and equipment |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3038602C2 (en) * | 1980-10-13 | 1986-09-25 | COPYTEX GmbH Sicherheitssysteme, 7730 Villingen-Schwenningen | Method for recognizing the authenticity of a data carrier |
| JPS58101385A (en) * | 1981-12-10 | 1983-06-16 | Tdk Corp | Magnetic card not erasable |
| JPS58111130A (en) * | 1981-12-24 | 1983-07-02 | Omron Tateisi Electronics Co | Magnetic recording medium |
| JPS60173722A (en) * | 1984-02-17 | 1985-09-07 | Matsushita Electric Ind Co Ltd | Magnetic card |
| GB8521363D0 (en) * | 1985-08-28 | 1985-10-02 | De La Rue Co Plc | Security card |
-
1987
- 1987-04-21 JP JP62096268A patent/JPH083898B2/en not_active Expired - Fee Related
-
1988
- 1988-04-14 WO PCT/JP1988/000371 patent/WO1988008591A1/en unknown
- 1988-04-14 AU AU15920/88A patent/AU1592088A/en not_active Abandoned
- 1988-04-20 CA CA000564643A patent/CA1305793C/en not_active Expired - Lifetime
- 1988-12-16 KR KR1019880701681A patent/KR890700878A/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63263602A (en) | 1988-10-31 |
| AU1592088A (en) | 1988-12-02 |
| KR890700878A (en) | 1989-04-28 |
| JPH083898B2 (en) | 1996-01-17 |
| WO1988008591A1 (en) | 1988-11-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |