DE4215955C1 - Two part information transmission system - has data sent to portable data carrying apparatus from read write unit divided into two differently transmitted parts - Google Patents

Abstract

The system includes a read/write unit (1) and a communicating portable data carrying arrangement (2). Information to be sent to the data carrying arrangement is divided into two parts. The two parts are transmitted under application of two transmission methods based on different physical principles. The two data parts are combined in the data carrying arrangement using a logic arrangement (2) to transmit information to the read/write unit, the information is combined inside the data carrying arrangement in a logic arrangement with additional information (SZ) transmitted from the read/write unit. ADVANTAGE - Copying of data carrying arrangement by simulation circuit, and interception of signal flow between both units.

Description

The invention relates to a system according to the preamble of Claim 1. Such systems usually exist of at least two parts, a read / write unit and a portable data carrier assembly. The read / write Unit is usually dependent on their training can be used as a terminal, as a reader or as a micro station draws. As a housing shape for the portable data carrier order depend on the individual application different forms of training, such as B. a key known. In most applications, however, is considered Data carrier arrangement uses a so-called chip card, as described in the book "The card with the chip: key to a world of new services and solutions "from Winfried Wigand, 1991, published by Siemens Aktiengesellschaft, Berlin and Munich, is described in detail.

In particular, this book on pages 29 to 36 deals with different card types and on pages 58 to 63 with different terminals. As a way of data or to transmit information is on page 29 wrote on such a card in the area of the chip Installation zone to attach contact surfaces to a surface or to provide such contact areas on the edge of the card. On page 34 reference is made to contactless chip cards, which either transmit signals using micro make waves or with the help of a transformato coupling.

A facility for information transfer with the help transformer coupling is among others in the  DE 34 47 560 A1 and the corresponding US-A-4,697,183 described. EP 0 309 201 A2 also describes one such facility. Such is from US-A-4818,855 Known facility in which signals using capacitive Coupling are transferable.

Like the book by W. Wigand described above on page 34 can be seen in the last paragraph, however, are data carriers Arrangements in the form of chip cards with contacts currently most common.

In very many applications of such facilities Signal transmission must listen to the signal transmission between read / write unit and data carrier arrangement un be connected. Can a fraudster intercept the signal flow He may be able to get one Simulate disk arrangement using the same ver hold like a real disk arrangement has. So that one Fraudsters no disk arrangement in a read / write unit can introduce and the signal transfer over after eavesdropping on outside lines are qualitative high quality read / write unit with a security system stem equipped, which, among other things, the operation of a Data carrier arrangement in this read / write unit only allows if after inserting the disk assembly the connection from the read / write unit to the outside for example, have been closed by a flap system is. A read / write unit that monitors the Signal flow between read / write unit and data carrier arrangement and thus the data flow between write / Reading unit and data carrier arrangement safely prevented is constructed here is very complex.

In the event that a fraudster blocks the traffic between the read / write unit and the data carrier arrangement  can monitor to prevent the fraudster from using a portable microprocessor circuit can reproduce order is described in EP 0 321 728 C2 a process in which physically related peculiarities a semiconductor circuit as authenticity feature be. A replica of a portable disk arrangement with standard components or programmable integrated circuits such. B. gate or cell arrays as well as PLDs etc. that have similar physical properties are not excluded.

The object of the present invention is an informa tion transmission system from a read / write unit and to provide a portable data carrier assembly at which is the replication of a portable data carrier arrangement is complicated by a simulation circuit and possibly also listening to the signal flow between the both units of the system is difficult. In particular is intended to replicate portable data carrier arrangements prevented by gate arrays, cell arrays and PLDs the.

This task is solved by an information transfer system with the features of one of the claims 1, 2 or 3. Favorable designs are the subject of subclaims.

In information transmission systems according to the invention is between a read / write unit and a portable baren disk arrangement information about it carry part of this information to be transmitted is transmitted using a first coupling device and the other part of the information to be transmitted A second coupling device is transmitted. Each of these coupling devices consists of one  Coupling device part in the read / write unit and out a coupling device part in the portable data carrier arrangement. The first and the second coupling device are each trained such that they perform with them transferable procedures on different physika based on principles. The two pieces of information NEN containing signals from the switching device share the portable disk assembly who received the, of these coupling device parts or of downstream demodulator, decoder or discriminators gate circuits prepared in a suitable manner that the transferred parts of information in from a nachschlal Processed form logic circuit are present for example as binary signals or digital signals. The be said logic arrangement is such that it turns on one output one of those fed in at their inputs Provides signal dependent signal. With such a Information transmission system must be a fraudster in two coupling devices transmitted information parts as well as the logic function of the logic arrangement, around that processed in the portable data carrier assembly To determine information. By using under it is different transmission methods for a Be deceptively very complex, the two signals with the two Sharing information at the same time with an information transmission within a read / write device determine.

Said logic arrangement in the portable data carrier order is used to link two pieces of information for total information. If e.g. B. an information section contains the data to be transferred and the other In formation part a key to be transmitted, so this logic arrangement as an encryption or decryption arrangement can be viewed. An input signal combination  this logic arrangement must clearly have an output signal can be assigned. The more complex it is, the over Entry of the key information from the read / write unit for portable data carrier arrangement in not calculated the easier it is to determine Key information should be designed. The security of the Transmission system can be increased in that the Linking function of the logic arrangement by the Read / write unit is controllably changeable. This can can be easily achieved by using one of the entrances logic arrangement or another at its exit Logic arrangement with two inputs is arranged, whereby one of these inputs depends on data that the Read / write unit for portable data carrier arrangement transmitted.

Due to the features according to the invention described above, contained in claim 1, it will be a Be deceptive to a great extent, the information exchange between a read / write unit and a portable one Monitor disk arrangement. Beyond that prevented that on the basis of a successful Monitoring the exchange of information of a fiction according information transfer system without knowledge the internal connection of a portable data carrier arrangement such a portable data carrier arrangement by a Simu tion circuit can be simulated. In a white Further development of the invention is that of the logic arrangement the portable disk assembly based on the information provided to received pieces of information transferred to the read / write unit and with a due of the information pieces sent out expected response formation compared. For this purpose, the read / write contains unit a circuit with a comparator. Such an in formation transmission system can be designed such  that if the comparison result is negative, the portable data Carrier arrangement by the read / write unit electrically is devalued and / or withheld. To interference exclude it can be provided that several independent pending comparisons of returned information with him expected response information are performed, the Read / write unit with a portable data carrier arrangement a certain number of negative information comparisons Chen recognized as a fake.

In an information transmission system according to the invention is a high security with relatively little effort standard available. It is usually sufficient if a Determining the transmitted information in a coupling equipment based on the technical implementation form is sword. The other coupling device can consequently from two coupling device parts with metallic contact ten exist. These coupling device parts can, however also be designed as inductors that are common form an electromagnetic transmitter or at the coupling device parts of the one coupling device can be designed as a capacity, so that an Infor mation is transferable with the aid of capacitive coupling. An inductive coupling device is u. a. from the DE 34 47 560 A1 known.

A particularly cheap one that can only be monitored with great effort Coupling device sees as a coupling device part of Read / write unit a device for changing a directional magnetic field in front and as a coupling device part of the portable data carrier arrangement one or more galvanomagnetic components and a control and Evaluation circuit before. Such coupling devices are in individual in the parallel to this patent application filed a patent application entitled "Institution for  Information transfer with a stationary part and egg ner portable disk assembly "described, the In is part of the disclosure of the present application.

Further possible coupling devices known per se are described in the corresponding subclaims 7 to 14 ben.

The invention is explained in more detail below with reference to the figures explained. It shows:

Figure 1 is a block diagram with the essential elements of an information transmission system according to the invention for the transmission of a read / write unit to a portable data carrier arrangement.

Figs. 2a and 2b, respectively, an embodiment of a coupling device;

. Figure 3 shows the layout of a particularly advantageous embodiment of the invention; and

Fig. 4 is a block diagram with the essential elements of an information transmission system according to the invention for the transfer from a portable data carrier arrangement to a read / write unit.

Fig. 1 shows an information transmission system with a read / write unit 1 and a portable data carrier arrangement 2nd The read / write unit 1 has a processing unit PU1, which can consist, for example, of a control logic or a microprocessor. A first coupling device is shown between the read / write unit and the portable data carrier arrangement, consisting of a coupling device part IF1a of the read / write unit and a corresponding coupling device part IF1b of the portable data carrier arrangement. In addition, a second coupling device with a coupling device part IF2a of the read / write unit 1 and a coupling device part IF2b of the portable data carrier arrangement is shown. The portable data carrier arrangement 2 comprises a logic arrangement LS with two inputs E1 and E2 and an output A. In addition, the portable data carrier arrangement includes a control unit PU2, which can consist, for example, of a control logic or a microprocessor. The logic arrangement LS is designed such that it provides - at least at a clock-dependent sampling time - a signal level at the output A which clearly depends on the wiring of the two inputs E1 and E2. The logic function of this logic arrangement LS does not have to be recursive.

The control unit PU1 of the read / write unit 1 outputs a signal with an information part S1 to the coupling part IF1a. The coupling device part IF1a transmits, depending on the selected transmission system, this information to the coupling device part IF1b of the portable data carrier arrangement, which in turn provides the information part 51 in for the logic arrangement LS in the form of a signal to the input E1 of the logic arrangement LS that this logic arrangement LS can evaluate. Another piece of information S2 is transmitted via the coupling parts IF2a and IF2b from the processing unit PU1 of the read / write unit 1 to the input E2 of the logic arrangement LS, other signal forms specific to the corresponding type of transmission being used. In Fig. 1, for the sake of simplicity, only the information flow of the information parts S1 and S2 is shown. Depending on the instantaneous values of the information parts S1 and S2 containing signals at the inputs E1 and E2 of the logic arrangement LS, this logic arrangement LS provides instantaneous values at its output A. The signal composed of these instantaneous values at output A of logic arrangement LS contains information S3. The signal with the information S3 is forwarded from the output A of the logic arrangement LS to the control unit PU2 of the portable data carrier arrangement 2 for further processing. The control unit or processing unit PU2 transmits information to the read / write unit 1 via a coupling device, for example the coupling device IF1b, IF1a in the form of predetermined signals. This information can partly or completely depend on the information 53 provided by the logic arrangement LS. In a special check case, even the information S3 itself can be transmitted from the control unit PU2 of the data carrier arrangement 2 to the control unit PU1 of the read / write unit. This case is shown by a corresponding arrow in Fig. 1.

For the present invention not primarily essential parts such. B. an input device and a display device of the read / write unit or a storage device of the portable data carrier arrangement are not shown in FIG. 1. In particular, the logic arrangement LS can be part of the control device PU2 of the portable data carrier arrangement.

The coupling device part IF1a can, for example, contain a data bus with the usual driver and / or register circuits and, as shown in FIG. 2a, metallic contacts 3 . The corresponding coupling device part IF1b of the portable data carrier arrangement 2 would then contain correspondingly arranged metallic contacts 4 . FIG. 2a shows a cross section through a portable data carrier arrangement 2 with metallic contacts 4 arranged on a surface and with a semiconductor body HL contained therein. Due to the measure bes not shown are provided on the semiconductor device HL connections, which are connected for example via wire connections, also not shown, to the metallic contacts 4 . The metallic contacts 4 are in the illustration of Fig. 2a with metallic contacts 3 contact separable, which are part of a Koppelvor directional part IF1a of a read / write unit.

Fig. 2b shows the cross section through another design configuration of a portable data carrier arrangement with egg ner in this built-in semiconductor arrangement HL. The portable data carrier arrangement 2 here includes a flat capacitor plate 5 as part of a coupling device IF1b or IF2b. A capacitor plate 6 is shown as part of a coupling device IF1a or IF2a of a read / write unit corresponding to this. The capacitor plate 6 forms with the capacitor Tora 5 during an information transfer a capacity, so that the information to be transferred in the form of a suitable signal capacitively from the portable data carrier arrangement to the read / write unit or from the read / write unit to the portable data carrier order is transferable .

The coupling device part IF2a of the read / write unit 1 can also contain a device for changing a directional magnetic field, for example an inductive coil with a suitably designed coil core. A coupling device part IF2b of the portable data carrier arrangement 2 to be corresponding here would then contain a galvano-magnetic component.

If, in another embodiment of the invention, the coupling device part IF2a of the read / write unit 1 contains a device with a controllable heat source for changing the ambient temperature of the portable data carrier arrangement, then the corresponding coupling device part IF2b contains at least one heat detector.

If, in another embodiment of the present invention, the coupling device part IF2a contains a device with an optical signal transmitter for changing the brightness at least in a limited area of the portable data carrier arrangement, the corresponding coupling device part IF2b of the portable data carrier arrangement 2 contains at least one optoelectronic component. Suitable optoelectronic components are photo diodes, photo transistors, photo resistors or photo cells. It is particularly favorable with such an embodiment, if the optoelectronic component with the remaining electronic circuit of the portable data carrier arrangement is introduced in a single monolithically integrated semiconductor component, so that no signal line between the optoelectronic component and the other semiconductor circuit is required, which can be monitored in a relatively simple manner, if necessary with fraudulent intent.

The logic arrangement LS can consist of almost any combination of basic logic circuits with a total of two signal inputs and one signal output. It is essential that the logic function of the logic arrangement LS is known in some way to the read / write unit 1 . Only then can the information to be transferred be split into the required information parts and, in addition, in the event that the portable data carrier arrangement two sends information back to the read / write unit depending on the transferred information parts S1 and S2, in the read / write unit 1 expected information can be determined, which can be compared with the returned information. Favorable embodiments of the logic arrangement LS contain, for example, an exclusive OR circuit and / or an equivalent circuit. These logic circuits are characterized in that due to their Ver linkage function with a uniform distribution of high levels and low levels at their inputs, the output signal also has a uniform distribution of high levels and low levels. The foundations for the implementation of logic arrangements are known, inter alia, from the book Integrated Digital Modules by Reiss, Liedl and Spichall, 2nd edition 1972, in particular on pages 25 to 63. In addition to implementing a logic arrangement LS according to the invention by means of discrete logic gates, such a logic arrangement can also be implemented by a suitably programmed microprocessor.

The embodiment shown in FIG. 3 of an information transmission system according to the invention uses, as coupling device IF1a, IF1b, a device for be smooth signal and energy transmission, as is known for example from DE 34 47 560 A1. Only the elements of the coupling device parts IF1a or IF1b required for the signal transmission or information transmission from the read / write unit to the portable data carrier arrangement are shown.

For the information transmission used in the exemplary embodiment with the aid of digital phase modulation (PSK = phase shift keying), the coupling device part IF1a of the read / write unit 1 contains two inductors L1 and L3. The inductor L3 is connected with a connection to a supply potential, for example ground, and the other connection is controlled by the control unit PU1. For this purpose, the control unit PU1 contains an oscillator OSZ, which emits a signal with a specific frequency. This oscillator signal is also switched via a controllable by the control unit PU1 phase shift device PS to a connection of the inductor L1. The other connection of this inductor L1 is, if appropriate, directly connected to a supply potential ground. In the embodiment, however, as the terminal of the inductor L1 may conveniently source via a current 11 a to the supply potential mass connected be a an operating point of the inductor L1 to adjust by the DC power source 11, which is then superimposed on the provided by the phase shifting arrangement PS AC becomes. The coupling device IF1b, which is to correspond to the coupling device IF1a, comprises in FIG. 3 an inductor L2 and an inductor L4 as well as a control and evaluation circuit LA. The inductor L4 of the portable data carrier arrangement forms with the inductor L3 of the read / write unit 1 an electromagnetic transmitter and the inductor L2 forms with the inductor L1 a further electromagnetic transmitter. The two connections of the inductivities L2 and L4 are each connected to the circuit arrangement LA and connected in this in a manner known, inter alia, from DE 34 47 560 A1.

The coupling device part IF2a of the read / write unit 1 includes an inductor L1, which is designed such that it can build up a directional magnetic constant field. For this purpose, a connection of the inductance L1 is connected to a supply potential. Fig. 3 shows in this respect a particularly advantageous embodiment, in which the inductor L1 is used several times. In this case, this supply potential is only quasi stationary, since an alternating signal is superimposed. The other connection of the inductor L1 is connected to the input of a device 10 Schaltvorrich, the output of which is connected via a current source 11 b to a supply potential ground. The control input of the switching device 10 is connected to the control unit PU1, so that the switching state of the switching device 10 is controlled by the control device PU1 bar. Play in the example shown in Fig. 3 Ausführungsbei the switched to the supply potential or ground terminal of the inductor L1 on the parallel connection of a current source 11a and the series circuit of the switching device 10 and the power source 11b connected to the supply potential mass. As a result, when the switching device 10 is actuated, a direct current flowing through the inductance L1 is increased or decreased. This leads to a change in the amount of the magnetic field induced in the inductance L1.

As the coupling device part IF2a of the portable data carrier arrangement corresponding to the coupling device part IF2a, a Hall element HE is provided in the exemplary embodiment according to FIG. 3, which is arranged during operation of the information transmission system within the range of the directional magnetic field of the inductance L1 which can be changed by actuating the switching device 10 . The Hall element HE is connected to a control and evaluation circuit HA, which forms a discrete-value signal from an analog signal change in the Hall element HE. The signal output of the circuit part LA and the signal output of the evaluation circuit HA are connected to an input of a synchronization device Syn. The synchronization device Syn is required if the signal transit time of the signals transmitted via the different coupling devices is of different sizes and / or if two pieces of information are transmitted at different transmission rates. In the given case, the synchronization device Syn can have a sample-and-hold circuit at the input connected to the evaluation circuit HA of the Hall element HE, which is driven with a synchronous clock such that the two outputs of the synchronization device Syn to the inputs E1 and E2 Logic arrangement LG always applies the signal level of the information parts to be linked together at the same time. The output A of the logic arrangement LG is connected to a control unit or processing unit PU2. The control unit PU2 corresponds to a storage device (not shown) and can also transmit signals to the read / write unit 1 in a manner known from DE 34 47 560 A1 via a modulation device contained in the circuit unit LA and not shown explicitly.

If the inductance L1 in the exemplary embodiment according to FIG. 3 is used both for the transmission of an electromagnetic alternating field and for the transmission of a directional magnetic direct field, it is nevertheless also possible to use independent inductivities for both applications. The arrangement for providing a changeable directed magnetic field can also be constructed in a different way. In particular, of course, combinations of the above-mentioned different couplings, which are not described in detail, can also be used in one direction types in an information transmission system according to the invention.

Fig. 4 shows an information transmission system according to the invention with the same or similar components as Fig. 1, but with different information flow. In the embodiment shown in FIG. 4, the control unit PU1 of the read / write unit 1 sends a signal S1 with information to be transmitted to the data carrier arrangement 2 to a coupling device part IF1a. Depending on the selected transmission system, the coupling device part IF1a transmits this information to the coupling device part IF1b of the portable data carrier arrangement 2 , which in turn forwards this information to a control unit PU2. The transfer of information from the read / write unit 1 to the portable data carrier arrangement 2 can, however, also take place in the manner shown in FIG. 1.

It is essential to the invention for an embodiment according to FIG. 1 that information S4 to be transmitted from the control unit PU2 of the portable data carrier arrangement 2 to the read / write unit 1 is passed to an input E1 of a logic arrangement LS. The control unit PU1 of the read / write unit 1 uses the coupling device from the parts IF2a and IF2b to transmit additional information Sz for the portable data carrier arrangement, which is connected to a second input E2 of the logic arrangement LS. The logic arrangement LS provides at its output A a signal which depends on the signals present at its two inputs E1 and E2. This signal present at output A with information S5 which is dependent on the information Sz and S4 is transmitted from the portable data carrier arrangement 2 to the read / write unit 1 via a coupling device, in the figure shown via the coupling device IF1a, IF1b, and is provided there to the control unit PU1 .

With an information transmission, not shown system with the features of claim 1 and the Merkma len of claim 2 are for both directions of transmission to use separate logic arrangements LS.

Claims (21)

1. Information transmission system, consisting of a read / write unit ( 1 ) and a portable data carrier arrangement ( 2 ) in which data or information from the read / write unit ( 1 ) to the portable data carrier arrangement ( 2 ) can be transmitted and data or information from the portable data carrier arrangement (2) can be transferred to the read / write unit (1), characterized in that a portion (S1) transmitted from the read / write unit (1) to the portable data carrier arrangement (2) information using a first transmission method via a coupling device part (IF1a) of the read / write unit ( 1 ) and a coupling device part (IF1b) of the portable data carrier arrangement ( 2 ), that another part (S2) of the information transmitted from the read / write unit ( 1 ) to the portable data carrier arrangement ( 2 ) using a second transmission method via a coupling part (IF2a) of the write / Reading unit ( 1 ) and a coupling device part (IF2b) of the portable data carrier arrangement ( 2 ) is transmitted such that the two parts (S1 and S2) of the data / information transmitted by the read / write unit ( 1 ) each correspond to the input variable Corresponding coupling device part (IF1b, IF2b) associated input (E1, E2) of a logic arrangement (LS) of the portable data carrier arrangement ( 2 ) are provided such that this logic arrangement (LS) at an output (A) depending on the inputs at said inputs ( E1, E2), the said partial information (S1, S2) containing signals provide a signal with information dependent on the input information parts (S1, S2) (S3) and that the first transmission method and the second transmission method are based on different physical principles are based. 2. Information transmission system, consisting of a read / write unit ( 1 ) and a portable data carrier arrangement ( 2 ) in which data or information from the read / write unit ( 1 ) to the portable data carrier arrangement ( 2 ) are transferable and data or information from the portable data carrier arrangement (2) can be transferred to the read / write unit (1), wherein one of the portable Since tenträgeranordnung (2) for read / write unit (1) information to be transmitted (S5) using a first transmission method over a Koppeleinrich processing part (IF1B ) of the portable data carrier arrangement ( 2 ) and a coupling device part (IF1a) of the read / write unit ( 1 ), and wherein from the read / write unit ( 1 ) to the portable data carrier arrangement ( 2 ) using a second transmission method via a coupling device part (IF2a ) the read / write unit ( 1 ) and a coupling device part (IF2b) of the portable Data carrier arrangement ( 2 ) an additional information (Sz) is transmitted, that a control unit (PU2) of the portable data carrier arrangement ( 2 ) transmits information (S4) to an input connection (E1) of a logic arrangement (L5), characterized in that that the additional information (Sz) is transmitted from the coupling device part (IF2b) of the portable data carrier arrangement ( 2 ) to a second input (E2) of the logic arrangement (LS), that the logic arrangement (LS) at its output (A) is that of the portable data carrier arrangement ( 2 ) provides information (S5) to be transmitted to the read / write unit ( 1 ), the information (S4) provided at its one input (E1) and the additional information (Sz) provided at its second input (E2) depends on and that the first transmission method and the second transmission method are based on different physical principles. 3. Information transmission system, consisting of a read / write unit ( 1 ) and a portable data carrier arrangement ( 2 ), in which data or information from the read / write unit ( 1 ) to the portable data carrier arrangement ( 2 ) can be transferred and data or information from the portable data carrier arrangement (2) can be transferred to the read / write unit (1), characterized in that for the transmission of information from the read / write unit (1) arrangement to the portable data carrier (2) a portion (S1) of the read / Reading unit ( 1 ) for portable data carrier arrangement ( 2 ) will transmit information using a first transmission method via a coupling part (IF1a) of the read / write unit ( 1 ) and a coupling part (IF1b) of the portable data carrier arrangement ( 2 ), that another part (S2) of the information transmitted from the read / write unit ( 1 ) to the portable data carrier arrangement ( 2 ) ation using a second transmission method via a coupling device part (IF2a) of the read / write unit ( 1 ) and a coupling device part (IF2b) of the portable data carrier arrangement ( 2 ) that the two parts (S1 and S2) of the write / Reading unit ( 1 ) transmitted data or information is provided as an input variable of an input (E1, E2) assigned to the corresponding coupling device part (IF1b, IF2b) of a first logic arrangement (LS) of the portable data carrier arrangement ( 2 ), that this first logic arrangement ( LS) at an output (A) as a function of the signals present at said inputs (E1, E2) and containing said partial information (S1, S2), a signal with information dependent on the input information parts (S1, S2) ( S3) provides for the transmission of information from the portable data carrier arrangement ( 2 ) to the read / write unit ( 1 ) Information (S5) is transmitted using a first transmission method via a coupling device part (IF1b) of the portable data carrier arrangement ( 2 ) and a coupling device part (IF1a) of the read / write unit ( 1 ), that of the read / write unit ( 1 ) to the portable Data carrier arrangement ( 2 ) using a second transmission method via a coupling device part (IF2a) of the read / write unit ( 1 ) and a coupling device part (IF2b) of the portable data carrier arrangement ( 2 ), additional information (Sz) that is transmitted by a control unit (PU2) the portable data carrier arrangement ( 2 ) information (S4) is transmitted to an input connection (E1) of a second logic arrangement (LS) that the additional information (Sz) from the coupling device part (IF2b) of the portable data carrier arrangement ( 2 ) to a second input ( E2) the second logic arrangement (LS) is transmitted and that the second logic arrangement (LS ) provides at its output (A) the information (S5) to be transmitted from the portable data carrier arrangement ( 2 ) to the read / write unit ( 1 ), from the information (S4) provided at its one input (E1) and from that their second input (E2) provided additional information (Sz) and that the first transmission method and the second transmission method are based on different physical principles. 4. Information transmission system according to one of the preceding claims, characterized in that the function of the logic arrangement (LS) depends on a key contained in the portable data carrier arrangement ( 2 ). 5. Information transmission system according to claim 1 or 3, characterized in that a coupling device (IF1a, IF1b) provided by the logic arrangement (LS) of the portable data carrier arrangement ( 2 ) te information (S3) to the read / write unit ( 1 ) and that The read / write unit ( 1 ) has a circuit part (PU1) for comparing the information (S3) returned by the portable data carrier arrangement ( 2 ) with response information expected on the basis of the transmitted partial information (S1 and S2). 6. Information transmission system according to one of the preceding claims, characterized in that the part of the information (S1) transmitting coupling device part (IF1a) of the read / write unit ( 1 ) and the corresponding Koppelein direction part (IF1b) of the portable data carrier arrangement ( 2 ) each have metallic contacts via which the read / write unit ( 1 ) can be connected directly to the portable data carrier arrangement ( 2 ) in an electrically conductive manner. 7. Information transmission system according to one of claims 1 to 5, characterized in that the part of the information (S1) transmitting coupling device part (IF1a) of the read / write unit ( 1 ) and the corresponding coupling device part (IF1b) of the portable data carrier arrangement ( 2 ) each contain an inductor, which together form an electromagnetic transmitter. 8. Information transmission system according to one of claims 1 to 5, characterized in that the part of the information (S1) transmitting coupling device part (IF1a) of the read / write unit ( 1 ) and the corresponding coupling device part (IF1b) of the portable data carrier arrangement ( 2 ) are designed such that they together form a capacity and that information from the read / write unit ( 1 ) is transmitted to the portable data carrier arrangement ( 2 ) with the aid of capacitive coupling. 9. Information transmission system according to one of the preceding claims, characterized in that the other part of the informa tion (S2) or the additional information (Sz) transmitting coupling device part (IF2a) of the read / write unit ( 1 ) has a device for changing a directed Contains magnetic field and that the corresponding Koppeleinrich device part (IF2b) of the portable data carrier arrangement ( 2 ) contains at least one galvanomagnetic component. 10. Information transmission system according to one of claims 1, 2, 3, 4, 5, 6, 8 or 9, characterized in that the other part of the information (S2) or the additional information (Sz) transmitting coupling device part (IF2a ) the read / write unit ( 1 ) and the corresponding coupling device part (IF2b) of the portable data carrier arrangement ( 2 ) each contain an inductance, which together form an electromagnetic transmitter. 11. Information transmission system according to one of the preceding claims, characterized in that the other part of the informa tion (S2) or the additional information (Sz) transmitting coupling device part (IF2a) of the read / write unit ( 1 ) has a device with a heat source for Changes in the ambient temperature of the portable data carrier arrangement ( 2 ) contains and that the corresponding coupling device part (IF2b) of the portable data carrier arrangement ( 2 ) contains at least one heat detector. 12. Information transmission system according to one of the preceding claims, characterized in that the other part of the informa tion (S2) or the additional information (Sz) transmitting coupling device part (IF2a) of the read / write unit ( 1 ) has a device with an optical signal generator Changes in the brightness at least in a limited area of the portable data carrier arrangement and that the corresponding coupling device part (IF2b) of the portable data carrier arrangement ( 2 ) contains at least one optoelectronic component. 13. Information transmission system according to claim 12, characterized in that the optoelectronic component is part of the only monolithically integerite semiconductor circuit (HL) of the portable data carrier arrangement ( 2 ). 14. Information transmission system according to one of the claims che 12 or 13, characterized net that a photo as an optoelectronic component diode is provided. 15. Information transmission system according to one of the claims che 12 or 13, characterized net that a photo as an optoelectronic component resistance is provided. 16. Information transmission system according to one of the claims che 12 or 13, characterized net that a photo as an optoelectronic component transistor is provided. 17. Information transmission system according to claim 12, characterized in that as  optoelectronic component provided a photocell is. 18. Information transmission system according to one of the previously outgoing claims, thereby records that the logic arrangement (LS) is an exclusive siv-OR circuit contains. 19. Information transmission system according to one of the previously outgoing claims, thereby records that the logic arrangement (LS) an equi valence circuit contains. 20. Information transmission system according to one of the preceding claims, characterized by a synchronization device (Syn) for synchronizing the two signals which contain the information parts (S1, S2) transmitted to the portable data carrier arrangement ( 2 ). 21. Information transmission system according to one of the preceding claims, characterized in that the logic function of the logic arrangement (LS) of the read / write unit ( 1 ) is controllably changeable.