CN1547428A

CN1547428A - Box and purse preventing bank card and IC card from theft by remote reader-writer

Info

Publication number: CN1547428A
Application number: CNA2003101171150A
Authority: CN
Inventors: 马兆瑞
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-12-03
Filing date: 2003-12-03
Publication date: 2004-11-17

Abstract

In recent years, a long distance read-write device has been invented abroad. It has high sensitivity and high read speed and super code recording capability. Even the cardholders put their credit cards into their wallets inside their clothes, the thieves around them can read and record all information of these cards by using the device mentioned above. After decoding fake cards are produced, then the cardholders' money may be stolen on ATM. According to media reports, this kind of crime has been spread to HK and Chinese Mainland. In this invention, cavity magnetizer or cavity magnetizer with tiny slot are made from soft magnetism material(sheet or composite film) .When the credit cards are put into them, the magnetic field intensity of the magnetic sheet on the cards near the outside of the cavity magnetizer will be reduced to zero because of the magnetic shield function of magnetizer. So thieves' long distance read-write device cannot steal any information in the credit cards, and the money can be prevented from stealing by hi-tech measures. The cavity magnetizer used to load credit cards can be made into a little metal box with simple structure and refined appearance(there have been official design and techniques), and it can also be made into wallets and purses(applying magnetizer material to its lining). In line with this principle, the contents of the magnetic record components such as cassettes, CDs, floppy discs, removable storage HDs or the contents of ICs and IC certificates are prevented from stealing or reading by non-contact long distance read-write device.

Description

The bank card IC-card prevents box and the wallet that the remote read-write device is surreptitiously read

One, affiliated technical field

Technical field under the patent of the present invention is the magnetic screen of ferromagnetics in physics, the metallography and the electromagnetism principle to electromagnetic interference shield.

Two, background technology

At present, global business bank all is to use one " magnetic stripe " attached to its surface to write down deposit content full detail to credit card (bank card) and the savings account book that the savings client provides.Because the ATM that the whole world is up to ten million all is the magnetic card service.Therefore, it is extremely difficult all replacing magnetic card with IC-card.Moreover magnetic card itself also has many advantages.

Original credit card read write line on the POS in global bank and market machine all is manufactured into always and has ditch shape track.When carrying out normal business operation, after must streaking in this ditch shape track with the handgrip credit card, the data in this card are connected read write line and read to the display screen of computer.

In recent years, invented a kind of remote read-write device of credit card abroad, its sensitivity and card reading speed are high, have super record sign indicating number ability.Even in the wallet of holder's credit card in clothes, also can the full detail in the credit card be read, record and write, then decryption and make the vacation card of an emulation by burglar's this read write line at one's side.The purpose of doing like this is to snap into the money of stealing on the ATM in former holder's credit card with this vacation.

This crime starts from Japan.According to media reports, Hong Kong and China's Mainland have been spread to.

Now, the credit card issue amount of China has surpassed 500,000,000, and the issued volume of the U.S. has surpassed 1,100,000,000.Nearly 10,000,000,000 of global issued volume.But whole world people's custom is to adorn credit card with the wallet of nonmetal (mainly being leather) system always at present.As long as credit card is effective, the magnetic domain on the magnetic stripe on the card will be sent the field signal of representing deposit information forever.Just the people that might be held credit card remote read-write device surreptitiously reads, and the money that takes place in the card is stolen then.

What the Japan citizen saw has proposed the problem how to solve after the above-mentioned social phenomenon that Japan happens occasionally.The present invention patent is answered this and is proposed.

Three, goal of the invention

Surreptitiously read other people credit card information at the popular employing credit card remote read-write device of narrating in the background technology, thereby reach the crime fact of fund in the theft card in some countries and regions.Patent of the present invention proposes a kind of box and wallet that can shield the field signal of credit card magnetic stripe fully, makes any read write line all not receive any field signal of credit card.Nature, it just can not read any information in the card, the also more impossible interior fund of card of stealing.Bring safety guarantee for the money in holder's credit card.

Four, technical scheme

Magnetic stripe on the global bank card all is a Ferrite Material manufacturing.It is a kind of ferrimagnet.After that is to say that all deposit information of holder in its credit card is written in the card, these information all will appear as the field signal of magnetic domain.The credit card read write line converts it to original deposit information after receiving these field signals.

Patent utilization of the present invention be the magnetic screen principle of electromagnetic electromagnetic shielding and ferromagnetics.At this patent product, all prove through experiment and theory analysis:

When a magnetic conductor internal action with cavity has magnetic field, the magnetic domain that magnetic field in this cavity magnetic conductor only can influence on this cavity magnetic conductor inner surface distributes and the interior Distribution of Magnetic Field of change cavity magnetic conductor, the result that these magnetic domains distribute finally is that the total magnetic intensity of magnetic conductor outer surface and cavity outside is equalled zero.

This conclusion is to meet " magnetic field Gauss law " (by magnetic flux identically vanishing of any enclosed curved surface in the magnetic field).Very simple solution is to make a cavity with permeability magnetic material, and credit card is placed in this cavity.So, the field signal on this card will be shielded fully by the wall of magnetic conductor cavity, and promptly the magnetic field intensity of credit card magnetic field on magnetic conductor cavity outer wall is zero.The result is any field signal that the read write line that is in magnetic conductor cavity outside will not receive credit card.

In fact, make the airtight capsule dress credit card of an Any shape, just can reach the effect of magnetic screen with ferrimagnet.Ferrimagnet is iron, cobalt, nickel and alloy thereof, also can be as ferritic dielectric and terres rares.But, should not select hard magnetic material for use as the product of this patent, and will select soft magnetic material (for example iron, silicon steel, permalloy) for use.After promptly this material was magnetized by external magnetic field, when external magnetic field being removed, the magnetic of this material can not keep substantially again.If make shielding box with hard magnetic material, externally strong magnetic field is removed the back because the hysteresis effect of hard magnetic material makes shielding box produce remanent magnetism, and this remanent magnetism can cause to a certain degree infringement to magnetic card.Therefore, should not use hard magnetic material.The permeability height of desirable magnetic shielding material, as comprise the Fe-Ni alloy (being high nickel steel) of permalloy (nickeliferous 36-81%).For example, the Fe-Ni alloy cold-strip product of nickeliferous 49-51% (thickness below 1 millimeter, model 1J50 and 1J51) just is suitable for making this patent product.Owing to its high nickeliferous costing an arm and a leg.Can select permalloy or high nickel steel for use if any special requirement.Cheap soft magnetic material is a ferritic steel.The low more then permeability of its phosphorus content height, coercive force is little, intensity is low.When implementing to manufacture a product, all to take into account this Several Parameters.

In Figure of description, the applicant has provided the shielding box structure that can adorn 4 bank cards.The function that this box is given in this patent application is: the dress bank card prevents that the remote read-write device from reading surreptitiously, preventing that high-tech from stealing the interior fund of card.In fact, this box enclosed cavity that has micro gap of being manufactured into Any shape all can possess the function of this patent product narration.The structure that provides in the Figure of description only is an example.

Because nickel itself also is ferrimagnet, so behind one nickel coating of shielding box surface increase, can increase Magnetic Shielding Effectiveness.

By the principle of magnetic screen, the thick more then shield effectiveness of the material thickness of shielding box is good more.But consider user's convenience and manufacturing process when implementing, the sheet material wall thickness is advisable in 1 millimeter.

Five, beneficial effect

Electronics science is development by leaps and bounds.The case of taking high-tech means to steal fund in the bank card is often taking place in the world.As long as used this product, can prevent effectively that the remote read-write device from surreptitiously reading, thereby prevent that high-tech from stealing fund in the card.Make the holder can not worry that when going on business, go abroad, travelling outside fund is stolen by high-tech crime in the card.Because this product is to make according to the principle of physics and metallography.Principle is eternal, thus this product prevent the remote read-write device surreptitiously read function also be eternal effectively.

At present, the applicant is making the shielding box that can adorn 2 cards.4 millimeters of box thickness carry very convenient.Make the backing layer of wallet, handbag with soft magnetic material thin film or spraying coating process.Credit card is contained in the such wallet and handbag, has also had to prevent that the remote read-write device from reading surreptitiously, preventing that high-tech from stealing the function of fund in the card.Very simple on the surface this patent product will bring the reliable sense of security to hundreds of millions of in the world holders when going on a journey.And avoided in case the money in the card is stolen the huge legal dispute between back holder and the bank.

Six, the drawing explanation

In Figure of description (totally 3 pages), Fig. 1 provides is " prevent remote read-write device from surreptitiously reading, preventing high-tech from stealing the box of fund in the card " shaft side figure; Fig. 2 is " prevent remote read-write device from surreptitiously reading, preventing high-tech from stealing the box of fund in the card " front view; Fig. 3 is the left view of Fig. 2; Fig. 4 is the vertical view of Fig. 2.

Fig. 5 is the film bag front view of the dress bank card of ferromagnetic thin film composite membrane manufacturing; Fig. 6 is the left view of Fig. 5;

Fig. 7 is the part sectioned view of Fig. 6, and the L1 layer of two hatchings is a polyester film, and the L2 layer is a polyethylene film, and the FMM layer is a ferromagnetic thin film.Space between the twice L2 layer is the space of dress bank card.

Seven, embodiment

The embodiment of patent of the present invention has following 4 aspects.

1, make metallic shield box (seeing Fig. 1 to Fig. 4) with soft magnetic material (for example Fe-Ni alloy cold-strip of ferritic steel sheet material, model 1J50,1J51 etc.), its planar dimension is just enough put a bank card in box; Thickness is advisable for can put 2-6 bank card in box.

2, the 1st magnetic card box and a leather wallet are bundled use.Two kinds of binding modes are arranged: a kind of is that the magnetic card box is put into wallet separately, and promptly box is combining of loose formula with wallet; Another kind of mode is that the magnetic card box directly is made in the wallet by production technology.

3, after being combined with each other with ferromagnetic thin film and polyester film, polyethylene film, make the film bag (seeing Fig. 5 to Fig. 7) of dress bank card; Also the composite membrane of ferromagnetic thin film can be made the lining of wallet, thereby make card prevent stolen reading.

4, soft magnetic material (for example nickel, iron) and non-ferromagnetic metal material (for example aluminium) film are made one (nickel, iron can be covered on the aluminium film with technologies such as brush plating, plating, plasma sprayings), then compound polyester film and the polyethylene film gone up in its both sides.Make the film bag with this kind composite membrane and adorn magnetic card, the interior card of bag is reached prevent the stolen function of reading.Adopt plasma spraying can make the ratio of nickel and iron proper, can obtain to be similar to the permeability effect of permalloy.More than the thickness of various films all in micron.Adopt the antimagnetic effect of the composite membrane of electroplating gained to can not show a candle to ferromagnetic thin film, because iron-nickel alloy is more much bigger than monomer iron (0.676) or monomer nickel (0.023) to absorption of electromagnetic wave loss value (3.54).But the effect of the anti-electromagnetic radiation of electroplating film is much better.

Claims

1, independent right is: the cavity magnetic conductor that the thin plate of every employing ferrimagnet or film are made or cavity magnetic conductor box that slit is arranged or film bag, utilize its magnetic screening action that has, the purpose of dress bank card, savings account book, stock card and other information magnetic card is in order to prevent that the card internal information from being read surreptitiously, prevent that by malice fund is stolen in the card.

2, everyly in wallet, be equiped with shielding box or shielding bag or the screen that soft magnetic material or ferromagnetic thin film are made, utilize its magnetic screening action that has, the purpose of dress bank card, savings account book, stock card and other information magnetic card is in order to prevent that the card internal information from being read surreptitiously, prevent that by malice fund is stolen in the card.

3, everyly in handbag, be equiped with shielding box or shielding bag or the screen that soft magnetic material or ferromagnetic thin film material are made, utilize its magnetic screening action that has, the purpose of dress bank card, savings account book, stock card and other information magnetic card is in order to prevent that the card internal information from being read surreptitiously, prevent that by malice fund is stolen in the card.

4, be equiped with shielding box or shielding bag or screen that ferrimagnet or ferromagnetic thin film are made in every shell, the packaging material at magnetic recording element (for example tape, CD, floppy disk, mobile storage hard disk etc.), utilize its magnetic screening action that has, purpose is to prevent that the magnetic recording element content from being stolen by contactless remote read-write device.