DE19620425A1 - Data carrier card and device for reading / writing the data carrier card in a floppy disk drive - Google Patents

Abstract

The invention relates to a data storage card with magnetic recording areas, where a first magnetic recording area is intended for reading/writing in an ordinary card reading/writing device. A second magnetic recording area is intended for reading/writing in a disc drive. An adapter (4) in the form of an ordinary diskette is used to accept the data storage and the adapter with the data storage card is inserted in a disc drive. The adapter (4) converts the driving motion of the disc drive into a to and fro movement of the data storage card and thus moves its second magnetic recording area past a read/write head in the disc drive.

Description

The present invention relates to a data carrier card with magnetic recording nungsflächen according to the preamble of claim 1 and a device for Le sen / writing a verse with at least one magnetic recording surface the disk card in a floppy disk drive.

Remote data transmission systems such as the global Internet are used for Information transmission and procurement used. Goods are also increasing or services offered via such remote data transmission systems. Since sol systems, especially the Internet, but as open and accessible to everyone networks are designed, the transmission of confidential data via such networks is pro blemish. This applies in particular to the payment of goods or services stung and the necessary transmission of payment transaction data. So includes, for example, the credit card payment that is frequently used on the Internet under About averaging of credit card data entered manually into the computer by the payment office end to the recipient a significant risk of abuse, as the credit card details can fall into the wrong hands in open networks. Similar problems arise the regulation and verification of access rights to certain resources in a network, for example the authorization to access a specific one, on the Internet integrated computer, as well as when checking the authorization to install a Software from a data carrier such as a CD-ROM. Entered by hand Passwords or the like also involve a considerable risk of misuse here.

The present invention has for its object disk cards and Vorrich to create solutions of the type mentioned at the outset, which ensure that Zah lung transactions, authorizations or the like on local computer systems or  facilitate via remote data transmission systems. The latter in particular is increasing mend important, because so-called CD-Writer are inexpensive and available for everyone thus the use of a CD-ROM as data carrier no longer offers any protection against robbery offers copiers.

According to a first aspect of the invention, one with magnetic recording surface-created disk card created the two magnetic recording has areas. A first magnetic recording surface is for reading / loading write provided in a card reader / writer. This first magnetic The recording surface is usually designed as a magnetic strip, as is the case with conventional ones Credit and bank cards are known. The term card reader / writer be draws in the context of the invention all devices with which in known The way such a magnetic stripe can be read or written. Such cards Reading / writing devices can be found, for example, in ATMs or credit card counters lung terminal use.

According to the invention, the data carrier card has a second magnetic recording surface che, which is intended for reading / writing in a floppy disk drive. The term Floppy disk drive in the context of the invention means any hardware by means of which itself on the surface or surfaces of a replaceable and essentially shit save or read out information sen. Such a floppy disk drive has at least one read / write head, which with the surface of the record carrier (floppy disk) interacts and by umma the same information can be stored on it. The changing magnet Reversing the surface induces when moving past the read / write head a stream in it so that the information can be read out again. in the Within the scope of the invention, the term floppy disk drive particularly preferably denotes a commercially available and internationally standardized 3 1/2 ′ ′ floppy disk drive.

The basic idea of the invention is to use it in a cost-effective manner Hardware devices usually present in computers to provide conditions that facilitate the processing of payment transactions with so-called end-to-end enable security. End-to-end security demands the greatest possible security both rend the data transmission as well as at the input and receiving stations of the Da ten. The security during data transmission can be established by known encryption  increase selection measures. Security measures for larger payment recipients gladly (trading companies, service organizations) as well as with the so-called Trust centers that process the payment transactions (credit card companies, ban ken etc.) usually include a professional, security aspect appropriate taking into account the regulation of access authorization to the corresponding invoice As well as often physical shielding of these computers in special security subject to safety measures. Greatest possible security even with the zah The end customer of a product / service requires that the payment recipient and / or the trust center directly with the credit / debit card of the Zah can communicate to security features stored there review and / or file information about the transaction performed.

For this purpose, the prior art proposes chip cards in particular, but for the end consumer additional investments in a reader / writer for chip cards require. For this reason, chip cards were able to process payments have not yet been enforced on the Internet.

The invention now uses the floppy disk drive that is present in every computer for communication between trust center / payee on the one hand and payment performers on the other. As the standard provided on usual data carrier cards hene magnetic stripe (the first magnetic recording surface) to Le sen / writing is provided in the usual card reading / writing devices According to the invention, a second magnetic recording surface is provided which Read / write and is provided in a conventional floppy disk drive. With little according to effort (an additional magnetic recording area on the data carrier gerkarte) and by using the existing hardware is a safe Ab Development of payment transactions with direct communication between Da Carrier card and trust center possible.

The present invention is not for use in the settlement of Payment transactions limited. It can be used in any process where there is direct communication for security or other reasons of a goods / service provider with a data carrier of a customer or poten tial customers is desired or required. For example, access to data remote transmission systems connected computers be regulated so that the  Access is only permitted to those persons who have a data carrier according to the invention Have a card and use it to identify yourself to the corresponding computer. In such an application, the present invention is not for use in connection with remote data transmission systems, it can also be used for the authorization of access to a local computer can be used. In this In this case, the corresponding data carrier card is desje directly from the disk drive some computer to be accessed is verified.

The data carrier cards and devices according to the invention are also in the frame men of the so-called activation of data acquired and / or via a Remote data transmission network of loaded software can be used. E.g. can be a disk ger like a CD-ROM contain a very extensive software package that the customer can acquire either in whole or in part. The activation of each acquisition NEN and paid parts of the program package is then carried out with the help of a fiction moderate data card. If necessary, it can also be ensured that the Pro gram package is only ever used on as many computers as licenses have been acquired. The customer already purchases further parts of the program package existing CD, the software distributor can, if necessary, via a remote data transmission system stem transmit the data required for activation and (if necessary, encrypted) save the data carrier card owned by the customer.

The application of the invention is always exemplified below in payment transaction tion processes are explained without being limited to this.

The data carrier card according to the invention particularly preferably has dimensions ISO / IEC 7810 or ISO / IEC 7811. In these standards are the usual international ones Dimensions of credit, bank and check cards set.

The second magnetic recording surface is preferably close to a narrow side of the card. The narrow side is the side of the card rectangle with the shorter side length. The arrangement near a narrow side enables one particularly simple design and geometry of the to be explained in more detail below Adapters to guide this recording surface past the read / write head 3 1/2 ′ ′ floppy disk drive.  

The magnetic recording tracks of the second magnetic recording surface preferably have a directional component parallel to the narrow side of the card, they particularly preferably run parallel to this narrow side. Reading / writing of data on this second magnetic recording surface takes place on this Embodiment by alternately reciprocating the card and its second magnetic recording surface along the read / write head as detailed below described.

As an additional security feature, at least part of the second record surface with a high magnetization density, carry information that cannot be deleted by means of the read / write head of a floppy disk drive. The maxi Male magnetic field strength that the read / write head of a conventional floppy disk run can write when writing on the magnetic recording surface is borders. It is therefore possible that a data carrier card according to the invention companies provide part of the second recording area with information puts that written with such a high magnetization or magnetization density are that the corresponding area of a floppy drive no longer encompasses can be gnetized. For example, certain basic information can be obtained and / or keys that can be used to encrypt data to be transmitted by manent on this recording surface, this information can be at the Processing of a payment transaction from the trust center using the floppy disk drive of the Although the payment provider is read, the payment provider can neither deliberately or involuntarily change.

Another aspect of the invention relates to a device for reading / writing disk card with magnetic recording surfaces in a disc drive. According to the invention, this device is the data carrier card mender and in the diskette insertable adapter designed by means of the we at least part of the recording area on a read / write head of the diskette Drive is movable along.

The adapter according to the invention corresponds in its external dimensions and The outer shape is essentially a conventional one that can be inserted into the floppy disk drive Diskette. In particular, he instructs the necessary devices for correct positioning floppy disk drive and facilities for interacting with the barrel  factory drive to convert the data carrier card into an ent to move speaking movement.

Mechanically, it is of course the simplest to rotate the data carrier card in the adapter to leave, since then no conversion of the rotary motion of the drive drive is required is such. In such an embodiment, the recording tracks of the Read / write head on the magnetic recording surface in the form of circular bo have gene segments.

However, if a standard ISO / IEC card is used in a 3 1/2 ′ ′ floppy drive sen / to be written, a rotational movement of this card is not possible because the length of the map diagonal is greater than 3 1/2 '' (8.89 cm). According to the invention is for this case provided that the adapter is a device for implementing the Drehbe Floppy disk drive moves in a reciprocating motion of the disk card has. The magnetic recording surface is then alternately on the Le se / write head moved past, the recording tracks are ver parallel to each other running straight lines.

The adapter according to the invention particularly preferably has a data carrier card receiving, reciprocable carriage. Such a sled allows exact positioning of the data carrier card in the adapter, interacting guide approximately on sledges and adapters can ensure that the out and Movement is defined and limited in its endpoints. Furthermore, the mutually rubbing surfaces of slide and adapter by appropriate dimensions Choice of materials and / or surface design to minimize sliding friction be.

The adapter preferably has a drive that can be driven by the drive of the floppy disk drive Turn or drive actuator, on which in turn one or more drive mandrels are attached are arranged. The drive mandrel or the drive mandrels also act on the slide arranged drivers in such a way that the circular movement of the drive actuator and the drive mandrel arranged thereon in a reciprocating movement of the slide is implemented. If, for example, the sled with the data carrier card is at or in is close to an end point, the rotating mandrel comes with a Mit engages and pushes the sled a certain distance towards the  other endpoint too. The drive starts at the latest when this end point is reached thorn out of engagement with the corresponding driver, in the further course of its It interacts with a second driver and pushes it Sledge back to its original position.

The adapter according to the invention is particularly suitable for use together Menhang with a data carrier card according to the invention according to one of claims 1 to 6, but not limited to such use. For example, it can also are used with data cards that only have one for reading / writing in magnetic recording surface provided for a floppy disk drive and not to additionally have the usual magnetic strips of the prior art. Such The data carrier card would then only be used for payment on the Internet (or via other means suitable remote data transmission systems), but not for processing Transak tion in stores equipped with standard card reading / writing utensils or at ATMs.

The data carrier card according to the invention and / or the adapter according to the invention for Reading / writing a disk card in a floppy disk drive are in the frame any payment processing procedures and other car mentioned above as an example risk assessment procedure usable. Both with payment processing and with one Other transmission of confidential data, there are procedures in which an encryption selected on the basis of random numbers. A computer as deterministic System, however, it is impossible to generate real random numbers. To create real A computer needs random numbers stochastic output data, which it itself cannot provide. For example, it is proposed in the prior art that the An to have any key combination pressed and the random ones Time intervals between two keystrokes for the generation of random pay to use.

Another aspect of the invention is therefore concerned with the generation of true randomness numbers. According to the invention, a method is proposed in which a magnetic Recording area of a data carrier card several times on a read / write head Floppy disk drive is moved past, the time between two Le se / writes can be used as a basis for generating random numbers. The me mechanical drive of a floppy disk drive and the transfer devices for  Generation of the desired movement of the data carrier card in the floppy disk drive bil a purely analog and not completely reproducible system, the movement of the The card in the floppy disk drive will vary purely stochastically, which is never completely identical Time spans between two read / write processes can therefore be real chastic basis for random number generation. Such a time span between two read / write processes usually arises from the fact that only during part of the movement of the disk card in the floppy disk drive of the read / write head of the drive of the associated magnetic recording surface of the card ge and data can be read or written.

Another aspect of the invention is concerned with methods of reading and writing of data from or onto a magnetic recording surface of a data carrier card in a floppy disk drive. For reasons of space, the one with the read / write head interactive recording area on the data carrier card usually only that Have the shape of a strip so that each time the card passes this head only a relatively short distance to record information available is available. With normal floppy disks, on which the floppy disk drive is of course set up , the read / write area becomes tracks (radially spaced circles) divided. Each track (i.e. each circle) is in turn divided into several sectors, i.e. arcs segments, divided, a so-called data field is written to each sector. Each in addition to the actual data, the sector also carries a checksum which enables verify the error-free transfer of data from or to the floppy disk. All Floppy disk drives are owned by so-called floppy disk drive controllers programs controlled for reading / writing with the corresponding track and sector classification are provided. The used at 3 1/2 '' floppy drives Industry standard for controllers is based on the µPD 765 chip from NEC.

The length of an uninterrupted read is on a data carrier card according to the invention The track is usually less than the length of a sector on a normal track Diskette. Accordingly, it is not possible to use sectors and related checksums to be created in a size (length) as known from the diskette controller. Instead each track of the magnetic recording surface of the data carrier card has only one only sector, which in turn is much shorter than a disk sector. In the Amounts of data suitable for such a sector are much smaller, the checksum To verify the data of such a sector, therefore, must be much shorter  Amount of data to be written to the disk card as it is the disk control actually provides.

When reading the data from a data carrier card, the controller reports one Data errors returned to the requesting program, as it checksum the for him cannot find the usual place. Common disk controllers have no kei own storage space, but use the main memory of the computer for storage save the read data. The data read from the data card is located therefore in memory despite the error message issued by the controller. Erfin According to the invention it is provided that a checksum on each track of the data carrier card is written to verify the data written on this track, the Creation of checksums and their writing on the recording surface independently of possible checksum formation and recording of the diskette drive controller he follows. When writing to the data carrier card is therefore by a separate and from Diskette controller independent program routine, the limited length of each Track on the data carrier card knows, a checksum is formed and on the data carrier card written. When reading from the data carrier card, one is also from the disk Tencontroller independent program routine provided for the verification of each track of the read data based on the checksum recorded on that track me to perform. The error messages of the diskette controller both when screaming ben as well as when reading are thus ignored, instead one becomes when writing separate checksum is written on the corresponding track and read the data already in the computer despite the error message from the controller depending on the error message checked using this separate checksum.

According to the invention, it is thus possible to write data using a floppy disk drive ben and read, due to the limited space on a disk card in saved in a different format than the diskette controller actually intended sees.

The following is an embodiment of a data carrier card according to the invention and an adapter according to the invention explained with reference to the drawings. In it gene:

. Figure 1 is a data carrier card according to the invention in a front view;

Figure 2 shows the same disk card in a rear view.

FIG. 3 is an adapter according to the invention in a top view;

4 shows an adapter according to the invention in a partial sectional view with the carriage disposed therein.:

5 shows the carriage for receiving the data carrier card in a plan view from above.

Fig. 6 is the same carriage in a view from below;

Figure 7 is a plan view of the turntable of the adapter with a drive mandrel to implement the rotary movement of the drive drive in a reciprocating movement of the carriage.

Fig. 8 is a section through adapter, slide and data carrier card along the line AA in Fig. 3;

Fig. 9-12 the interaction of the drive mandrel of the turntable and driver of the carriage to generate a back and forth movement of the disk card.

FIG. 1 is a front view of a conventional ISO / IEC shows card 1, for example. A credit card. As can be seen in Fig. 2, the card 1 has in a conventional manner a known magnetic strip 2 , which is provided for reading or writing in conventional card read / write devices. According to the invention, an additional magnetic strip 3 is now provided in the area of a narrow side of the card, which is provided for interacting with a read / write head of a floppy disk drive. The magnetic stripe 3 can otherwise be identical in type to the magnetic stripe 2 and can therefore be applied to the card 1 using conventional and known devices. Since the card 1 , as explained in more detail below, is moved back and forth parallel to its narrow sides in the disk drive, the recording tracks of the magnetic strip 3 run perpendicular to those of the magnetic strip 2 .

Fig. 3 shows a plan view of an adapter according to the invention for reading / writing a disk card in a commercially available 3 1/2 '' floppy disk drive. The outer dimensions of this adapter 4 correspond essentially to that of a übli chen 3 1/2 '' disk. In Fig. 4 the same adapter is shown schematically with the carriage 7 arranged therein, the carriage 7 receives the data card 1 . The ad apter 4 has a slot 5 , in which a rail 8 of the carriage 7 slides. The interaction of slot 5 and rail 8 allows the carriage 7 to be moved back and forth within the cavity of the adapter 4 parallel to the longitudinal direction of the slot 5 . The housing of the adapter 4 has a recess 6 , within which, during the reciprocating movement of the carriage 7, an opening 9 arranged in this carriage moves.

As can be seen in FIGS. 5 and 6, the carriage 7 has an opening 10 for inserting the data carrier card 1 . This card is inserted so that the magnetic strip 3 is inside the opening 9 . It is accessible through the openings 9 and Ausspa tion 6 from the outside for a read / write head of the floppy disk drive. On the underside shown in FIG. 6, the carriage driver 11, 12 , which, in a manner yet to be explained, cooperate in the production of a back and forth movement of the carriage 7 within the housing of the adapter 4 along the direction of the slot 5 .

The housing of the adapter 4 can be opened and closed again for the purpose of inserting or removing the carriage 7 receiving the card 1 .

In Fig. 7 it can be seen that in the region of the outer circumference of the rotary or drive actuator 13, a drive mandrel 14 is arranged. With 15 and 16 , the well-known and existing starting points for engine and Indexlochge generation are designated.

Fig. 8 shows a section along the line AA of Fig. 3, which shows the interaction of the individual elements. The in the housing of the adapter 4 rotatably arranged on the rotary plate 13 is rotated by the drive mandrels 17 , 18 of the drive. The drive pin 14 can cooperate with the drivers 11 , 12 of the carriage 7 to produce a back and forth movement. The cooperating with the slot 5 guide rail 8 ensures that the forces acting from the drive mandrel 14 on the drivers 11 , 12 are only converted into a reciprocating movement and leads perpendicular to the intended direction of movement of the slide tens 7 acting force components in the housing of the adapter 4 . The carriage 7 receives the data carrier card 1 essentially in a form-fitting manner. During the back and forth movement, a read / write head of the floppy disk drive has access to the magnetic strip 3 through the recess 6 and the opening 9 . Since the reading / writing of disks usually takes place on both sides, the corresponding opposite reading / writing head must be protected by appropriate safety devices (e.g. a type of rail, not shown in the drawing) before a potentially damaging contact with the front having no magnetic surface card 1 must be preserved.

In FIGS. 9 to 12 is schematically shown how the drive mandrel 14 and cooperating Mitneh mer 11, 12 for generating a reciprocating movement (arrows 19 and 20 in FIGS. 9 and 11). In Fig. 9 it can be seen that the mandrel 14 strikes with maximum speed component in the direction of arrow 19 on the driver 12 and thus accelerates the carriage 7 in the direction of arrow 19 . Possibly. Force components occurring perpendicular to the arrow 19 are derived from the rail 8 via the slot 5 into the housing of the adapter 4 . At the latest when the desired end position of the carriage 7 is reached, the mandrel 14 disengages from the driver 12 and continues to rotate. In FIG. 11 it can be seen how it strikes the second driver 11 and thus transports the carriage back to its starting position in the direction of arrow 20 . The speed of the carriage 7 at the moment the magnetic strip 3 moves past the read / write head must be sufficiently high to enable information to be written with sufficient magnetization density.

Claims (13)

1. With magnetic recording surfaces ( 2 , 3 ) provided data carrier card, with a first magnetic recording surface ( 2 ) which is provided for reading / writing in a card reader / writer, characterized by a second magnetic recording surface ( 3 ) for reading / Describe is provided in a floppy disk drive. 2. Card according to claim 1, characterized in that it has dimensions according to ISO / IEC 7810 or ISO / IEC 7811. 3. Card according to claim 2, characterized in that the second magnetic recording surface ( 3 ) is arranged in the vicinity of a narrow side of the card. 4. Card according to claim 3, characterized in that the magnetic recording tracks on the second magnetic recording surface ( 3 ) have a directional component parallel to the narrow side. 5. Card according to claim 4, characterized in that the recording tracks run parallel to the narrow side. 6. Card according to one of claims 1 to 5, characterized in that little least part of the second recording surface ( 3 ) carries with high magnetization density written information that cannot be erased by means of the read / write head of a floppy disk drive. 7. Device for reading / writing a disk card provided with at least one magnetic recording surface in a floppy disk drive, characterized in that it is designed as the disk card ( 1 ) and the floppy disk drive insertable adapter ( 4 ) is designed by means of which at least part of the recording surface is movable along a read / write head of the disk drive. 8. The device according to claim 7, characterized in that it is a Einrich device for converting the rotational movement of the diskette drive into a Has back and forth movement of the disk card. 9. The device according to claim 8, characterized in that it has a Da carrier card receiving, reciprocable carriage ( 7 ). 10. The device according to claim 9, characterized by on the carriage ( 7 ) arranged drivers ( 11 , 12 ) and a drive actuator ( 13 ) which can be driven by the drive of the floppy disk drive, the drive actuator ( 13 ) with the drivers ( 11 , 12 ) of the slide cooperating drive mandrels ( 14 ) for generating a back and forth movement of the slide. 11. A method for generating random numbers, characterized in that a magnetic recording surface of a data carrier card several times on one Read / write head of a floppy disk drive is moving past and that time span between two reads / writes as a basis for random numbers generation can be used. 12. A method of writing data on a magnetic recording surface a data carrier card in a floppy disk drive, characterized in that that on each recording track a checksum to verify the on the written data is written, the checksum formation and writing them on the recording surface regardless of something checksum formation and recording of the diskette drive controller he follows. 13. A method of reading data recorded according to claim 12 from a magnetic recording surface of a disk card in a floppy disk drive, characterized in that the verification of the ge of each track read data based on the checksum recorded on this track a program is carried out that is independent of the disk drive controller.