Title of Invention	" A SYSTEM FOR TRANSMITTING DATA FROM A TACHOGRAPH"
Abstract	The invention relates to a system (1) for transmitting data from a tachograph, comprising a tachograph (2) which stores driver-related data (50) digitally in an internal first memory (31), the tachograph (2) comprising a USB socket (8); a mobile external data memory device (3) which has a second memory (41), the mobile external data memory device (3) comprising a USB plug (11) configured to be plugged directly into the USB socket (8) of the tachograph (2) so that data (50) can be transmitted between the USB socket (8) and the USB plug (11) at a location physically inside the tachograph (2), wherein the second memory (41) contains driver information, a driver authentication code, and a unique encryption key; wherein the tachograph (2) has a first encrypting unit (32) which is associated with the USB socket (8) and the data memory device (3) has a second encrypting unit (42) which is associated with the USB plug (11) so that data (50) can be transmitted encrypted with the unique encryption key (32) between the USB socket (8) and the USB plug (11) after a driver correctly inputs the driver authentication code contained in the second memory (41).

Title of Invention

" A SYSTEM FOR TRANSMITTING DATA FROM A TACHOGRAPH"

Abstract

The invention relates to a system (1) for transmitting data from a tachograph, comprising a tachograph (2) which stores driver-related data (50) digitally in an internal first memory (31), the tachograph (2) comprising a USB socket (8); a mobile external data memory device (3) which has a second memory (41), the mobile external data memory device (3) comprising a USB plug (11) configured to be plugged directly into the USB socket (8) of the tachograph (2) so that data (50) can be transmitted between the USB socket (8) and the USB plug (11) at a location physically inside the tachograph (2), wherein the second memory (41) contains driver information, a driver authentication code, and a unique encryption key; wherein the tachograph (2) has a first encrypting unit (32) which is associated with the USB socket (8) and the data memory device (3) has a second encrypting unit (42) which is associated with the USB plug (11) so that data (50) can be transmitted encrypted with the unique encryption key (32) between the USB socket (8) and the USB plug (11) after a driver correctly inputs the driver authentication code contained in the second memory (41).

Full Text	The invention relates to a system comprising a tachograph which stores driver- related data digitally in an internal first memory, with a mobile external data memory device which has a second memory, with an external first interface at the tachograph and an external second interface at the external memory device which corresponds with the first interface so that data can be transmitted between the first interface and the second interface. In addition, a method for transmitting data from a tachograph which stores driver-related data digitally in an internal memory to a mobile data memory device by means of an external first interface at the tachograph and an external second interface at the external memory device which corresponds with the first interface so that data can be transmitted between the first interface and the second interface, is the subject matter of the invention. The new generation of tachographs does not store data by recording on a paper record chart as previously but in digital form electronically in a memory. Such a tachograph is known from EP0762339A2. DE 19837488 discloses a debiting device which is arranged in a vehicle and which is provided for deducting toils. Said toils are to be paid for the utilization of distances of a road network which require the payment of a toll. The inventive device is comprised of device modules which are permanently installed in the vehicle. The device modules consist of a vehicle box, an external communications module, and a holding module. The device modules also include a mobile electronic toll device which can be inserted into said holding module and which can be easily removed again from the same. DE20112392 describes a traffic toll charging system comprising a detection device, which is provided in a motor vehicle of a user, whereby book values can be transferred in the detection device. US 4188618 discloses a digital tachograph system which includes a vehicle unit operative to detect vehicle performance characteristics such as vehicle speed, elapsed trip distance, engine rpm, total engine revolutions, total fuel consumption, rate of fuel consumption and the like as a function of time. The forgoing vehicle performance characteristic data is displayed in the vehicle unit and is stored in a data memory located therein. A fixed base unit includes a central computer system for processing vehicle performance data, storing the data in a memory file and for reading out the vehicle performance data in the form of a printout, graph plot, CRT display or the like. The vehicle performance data may be transferred from the vehicle unit to a field terminal which connects to the central computer system either by means of a cable connection by directly interconnecting said portable memory unit or by radio transmission means. The so called digital tachograph to be introduced shortly on the market operates with an internal memory and a chip card, that is to say an external storage medium, when storing the data. The chip card is completely accommodated by the digital tachograph and is completely isolated from the environment by means of mechanical provisions during the data transmission between the internal memory of the tachograph and the memory of the chip card. This is intended to prevent manipulations. The advantage of using a chip card consists in that the latter can be completely isolated from the environment. However, the great expenditure associated with the isolation during the data transmission is disadvantageous. The data card must be accommodated completely by the digital tachograph which, accordingly, must have a device for automatically receiving and delivering. In addition, it must be possible to close the opening through which the data card enters into the tachograph securely against manipulation and relevant regulations require that this shutter is locked in the closed position. The high degree of mechanical security precautions against manipulation is associated with high costs and great complexity. It is the object of the invention to render an arrangement and a method of the type initially mentioned to be less complex and more inexpensive without compromises with regard to the security against manipulation. To achieve the object, it is proposed according to the invention that the tachograph has a first encrypting unit which is associated with the first external interface and the memory device has a second encrypting unit which is associated with the second external interface so that data can be transmitted encrypted between the first interface and the second interface. In addition, the invention proposes a method of the type initially mentioned in which the tachograph has a first encrypting unit which is associated with the first external interface and the memory device has a second encrypting unit which is associated with the second external interface and data which are transmitted from the tachograph to the memory device are encrypted by means of the first e'ncrypting unit before the transmission and data which are transmitted from the memory device to the tachograph are encrypted by means of the second encrypting unit before the transmission. Compared with the known digital tachograph, both the arrangement according to the invention and the method according to the invention have the serious advantage that mechanical protection against manipulations, particularly a protection of electrical contacts of the first interface and the second interface, is obsolete. Due to the elimination of the very complex chip card mechanism for pulling in and delivering the data card, the costs are considerably lowered and the space required by the device is distinctly reduced. The keys for ejecting the chip cards needed in a conventional digital tachograph are no longer required which advantageously creates further space on the front panel for additional operating elements. In addition, the life of the overall device is no longer limited by the sensitive mechanism. According to the invention, the protection against manipulation is exclusively provided by the encryption before the data transmission. Picking up electrical signals with manipulatory intent, therefore, will not lead to the desired success. The second memory of the external memory device can be suitably between 32 MBytes and 2 GBytes. Memory space not needed for the core application can be suitably used for other applications. The encryption can be carried out advantageously by means of triple-DES (data encryption standard) and asymmetric RSA encryption algorithms. Thus, there is provided according to the invention a system for transmitting data from a tachograph, comprising a tachograph which stores driver-related data digitally in an internal first memory the tachograph comprising a USB socket, a mobile external data memory device which has a second memory, the mobile external data memory device comprising a USB plug configured to be plugged directly into the USB socket of the tachograph so that data can be transmitted between the USB socket and the USB plug at a location physically inside the tachograph, wherein the second memory contains driver information, a driver authentication code, and a unique encryption key; wherein the tachograph has a first encrypting unit which is associated with the USB socket and the data memory device has a second encrypting unit which is associated with the USB plug so that data can be transmitted encrypted with the unique encryption key between the USB socket and the USB plug after a driver correctly inputs the driver authentication code contained in the second memory. An advantageous development of the invention provides that the first external interface and the second external interface are constructed in such a manner that they can form a plug-in connection with one another via which data can be transmitted. Such an embodiment is particularly simple and rugged and can be carried out by means of relevant plug-in connections, for example, the plug-in connection can be constructed as RS232. Such a plug-in connection is particularly suitably constructed as USB (universal serial bus) connection wherein, in particular, the first interface at the tachograph can be constructed as socket and the second interface at the memory device ca be constructed as plug. The construction as USB interface results in an advantageously high transmission rate and, at the same time, this arrangement is particularly rugged mechanically, particularly if, as preferred, the socket is arranged at the tachograph and the plug is arranged at the external memory device. In this manner, there is no element protruding at the tachograph either. A further increase in stability and additional increase in the life of the overall arrangement is obtained when the first external interface and the second external interface are constructed in such a manner that they can exchange data with one another cablelessly. This option, which is only obtained with the association according to the invention of encrypting units with the interfaces has the advantage, on the one hand, that no plug-in capability for the interface connection needs to be provided at the front panel of the tachograph and, on the other end, it results in much more convenient handling of both devices. For the cableless data transmission according to the arrangement according to the invention or the method according to the invention, the two interfaces involved can be suitably constructed as wireless USB or Bluetooth chip arrangements. When using a wireless USB connection, data transmission can already take place at a distance of 50m. In addition such an arrangement is also particularly inexpensive compared with Bluetooth. A wireless USB connection can be suitably produced in accordance with the WUSB standard. The data memory device can be advantageously supplied with the required operating power by means of an integrated transponder. To obtain limitless flexibility, the external memory device, in turn, can have an exchangeable storage medium so that, in particular, driver-related data can also be moved independently of the external memory device. In this manner, the external memory device can essentially have the function of an adapter or of a terminal for transmitting data from the memory of a tachograph to an exchangeable storage medium, wherein the external storage medium essentially takes over the function of encryption. A further advantage of this arrangement lies in the fact that the memory device now only needs to be provided for each tachograph in operation and It is no longer necessary for each user to have a separate device. So that the user can conveniently check the correct operation of the memory device, it is suitable if the latter has at least one light-emitting means which emits light or flashes depending on whether a data transmission is taking place. A second light-emitting means could be additionally used as indicator for a correct voltage supply. Particularly in the case where the two interfaces are constructed as plug-in connection, it is suitable if this connection is constructed in such a manner that the memory device is supplied with operating power from the tachograph. In this manner, the correct operation is no longer dependent on the charge state of a battery in the memory device. To avoid false associations of memory devices with vehicles or drivers, it is appropriate if man-readable information is applied as print on the memory device. This can be, for example, an identification number which is allocated to the vehicle driver. For particularly convenient handling, the external memory device is suitably constructed in small format and provided at the place where the printed-on man-readable information is located with a transparent layer domed in the direction of a reader, which allows the print to appear optically larger and thus facilitates the reading. So that an unauthorized user does not obtain access to encrypted data, either, it is suitable that after a connection has been established between the first interface and the second interface, the tachograph requests a user to input a code by means of which the user authenticates himself. It is only after this authentication code has been input correctly that data transmission is possible. In the text which follows, the invention is explained in greater detail by means of two exemplary embodiments, referring to the accompanying drawing in which: Figure 1 - shows a diagrammatic representation of an arrangement according to the invention comprising a digital tachograph and an external memory device which can be connected to one another by means of a plug-in connection, Figure 2 - shows an arrangement comprising a digital tachograph and an external memory device in a diagrammatic representation with cableless data transmission, and Figure 3 - shows a diagrammatic representation of the operating of an arrangement according to the invention and of the method according to the invention, respectively. The arrangements 1 according to the invention, shown in figures 1 and 2, comprise a digital tachograph 2 and in each case an external data memory device 3. The digital tachograph 2 is shown in a front view, a front panel 4 exhibiting a printer drawer 5, various operating elements 6, a display 7 and two first interfaces 9 constructed as socket 8. The data memory device 3 is provided with a second interface 10 constructed as plug 11 which corresponds with the first interface 8 in such a manner that plugging the plug 11 into the socket 8 establishes a plug-in connection and contacts of the first interface 9 establish an electrically conductive connection with contacts of the second interface 10. The resultant plug-in connection 13 is constructed as universal serial bus. The data memory device 3 is equipped with a light-emitting means 15 which, by flashing, indicates to a user that a data transmission is taking place. The exemplary embodiment of the invention, shown in figure 2, essentially corresponds to that of figure 1, wherein the first interface 9 and the second interface 10 exchange data with one another by means of a cableless connection 20. The data memory device 3 is provided with writing 61 covered with a transparent layer 60 domed in the direction of a reader. The layer 60 optically enlarges the writing 61 in a manner comparable to a lens. In the diagrammatic representation of the operational relationships of the arrangement 1 of figure 3, the tachograph 2 has a connection 20 to the data memory device 3 for data transmission. The tachograph 2 has a first processor 30 which has a controlling, monitoring or regulating connection to a first memory 31, a first encrypting unit 32 and a first interface 9. The data memory device 3 similarly has a second processor 40 which has a controlling regulating or monitoring connection to a second memory 41, a second encrypting unit 42 and the second interface 10. The second memory 41 is a storage medium 45 which can be separated from the data memory device 3. Data 50 transmitted by the tachograph 2 are conveyed under control of the first processor 30 from the first memory 31 to the first encrypting unit 32 where they are encrypted and then transferred from the first interface 9 to the second interface 10. Analogously, the second processor 40 controls a process in the data memory device 3 so that data 50 from the second memory 41, before being conveyed from the second interface 10 to the first interface 9, are first encrypted in the second encrypting unit 42. WE CLAIM 1. A system (1) for transmitting data from a tachograph, comprising:- a tachograph (2) which stores driver-related data (50) digitally in an internal first memory (31), the tachograph (2) comprising a USB socket (8); a mobile external data memory device (3) which has a second memory (41), the mobile external data memory device (3) comprising a USB plug (11) configured to be plugged directly into the USB socket (8) of the tachograph (2) so that data (50) can be transmitted between the USB socket (8) and the USB plug (11) at a location physically inside the tachograph (2), wherein the second memory (41) contains driver information, a driver authentication code, and a unique encryption key; wherein the tachograph (2) has a first encrypting unit (32) which is associated with the USB socket (8) and the data memory device (3) has a second encrypting unit (42) which is associated with the USB plug (11) so that data (50) can be transmitted encrypted with the unique encryption key (32) between the USB socket (8) and the USB plug (11) after a driver correctly inputs the driver authentication code contained in the second memory (41). 2. The system as claimed in claim 1, wherein the USB socket (8) and the USB plug (11) are constructed in such a manner that they can be exchanged data (50) with one another cablelessly. 3. The system as claimed in claim 1, wherein the data memory device (3) has an exchangeable storage medium (45). 4. The system as claimed in claim 1, wherein the data memory device (3) has at least one light-emitting means (15) which emits light or flashes depending on whether a data transmission is taking place. 5. The system as claimed in claim 1, wherein a connection (13) between the USB socket (8) and the USB plug (11) is constructed in such a manner that the data memory device (3) can be supplied with operating power by means of the connection (20). 6. The system as claimed in claim 1, wherein man-readable information is applied as print on the data memory device (3). 7. The system as claimed in claim 1, wherein the printed-on-man-readable information is provided with a transparent layer (60) domed in the direction of a reader, which allows the print to appear optically larger. ABSTRACT TITLE "A SYSTEM FOR TRANSMITTING DATA FROM A TACHOGRAPH" The invention relates to a system (1) for transmitting data from a tachograph, comprising a tachograph (2) which stores driver-related data (50) digitally in an internal first memory (31), the tachograph (2) comprising a USB socket (8); a mobile external data memory device (3) which has a second memory (41), the mobile external data memory device (3) comprising a USB plug (11) configured to be plugged directly into the USB socket (8) of the tachograph (2) so that data (50) can be transmitted between the USB socket (8) and the USB plug (11) at a location physically inside the tachograph (2), wherein the second memory (41) contains driver information, a driver authentication code, and a unique encryption key; wherein the tachograph (2) has a first encrypting unit (32) which is associated with the USB socket (8) and the data memory device (3) has a second encrypting unit (42) which is associated with the USB plug (11) so that data (50) can be transmitted encrypted with the unique encryption key (32) between the USB socket (8) and the USB plug (11) after a driver correctly inputs the driver authentication code contained in the second memory (41).

Full Text

The invention relates to a system comprising a tachograph which stores driver-
related data digitally in an internal first memory, with a mobile external data
memory device which has a second memory, with an external first interface at
the tachograph and an external second interface at the external memory device
which corresponds with the first interface so that data can be transmitted
between the first interface and the second interface. In addition, a method for
transmitting data from a tachograph which stores driver-related data digitally in
an internal memory to a mobile data memory device by means of an external
first interface at the tachograph and an external second interface at the external
memory device which corresponds with the first interface so that data can be
transmitted between the first interface and the second interface, is the subject
matter of the invention.
The new generation of tachographs does not store data by recording on a paper
record chart as previously but in digital form electronically in a memory. Such a
tachograph is known from EP0762339A2.
DE 19837488 discloses a debiting device which is arranged in a vehicle and
which is provided for deducting toils. Said toils are to be paid for the utilization of
distances of a road network which require the payment of a toll. The inventive
device is comprised of device modules which are permanently installed in the
vehicle. The device modules consist of a vehicle box, an external
communications module, and a holding module. The device modules also include
a mobile electronic toll device which can be inserted into said holding module
and which can be easily removed again from the same.

DE20112392 describes a traffic toll charging system comprising a detection
device, which is provided in a motor vehicle of a user, whereby book values can
be transferred in the detection device.
US 4188618 discloses a digital tachograph system which includes a vehicle unit
operative to detect vehicle performance characteristics such as vehicle speed,
elapsed trip distance, engine rpm, total engine revolutions, total fuel
consumption, rate of fuel consumption and the like as a function of time. The
forgoing vehicle performance characteristic data is displayed in the vehicle unit
and is stored in a data memory located therein. A fixed base unit includes a
central computer system for processing vehicle performance data, storing the
data in a memory file and for reading out the vehicle performance data in the
form of a printout, graph plot, CRT display or the like. The vehicle performance
data may be transferred from the vehicle unit to a field terminal which connects
to the central computer system either by means of a cable connection by directly
interconnecting said portable memory unit or by radio transmission means.
The so called digital tachograph to be introduced shortly on the market operates
with an internal memory and a chip card, that is to say an external storage
medium, when storing the data. The chip card is completely accommodated by
the digital tachograph and is completely isolated from the environment by means
of mechanical provisions during the data transmission between the internal
memory of the tachograph and the memory of the chip card. This is

intended to prevent manipulations. The advantage of using a chip card consists
in that the latter can be completely isolated from the environment. However, the
great expenditure associated with the isolation during the data transmission is
disadvantageous. The data card must be accommodated completely by the
digital tachograph which, accordingly, must have a device for automatically
receiving and delivering. In addition, it must be possible to close the opening
through which the data card enters into the tachograph securely against
manipulation and relevant regulations require that this shutter is locked in the
closed position. The high degree of mechanical security precautions against
manipulation is associated with high costs and great complexity.
It is the object of the invention to render an arrangement and a method of the
type initially mentioned to be less complex and more inexpensive without
compromises with regard to the security against manipulation.
To achieve the object, it is proposed according to the invention that the
tachograph has a first encrypting unit which is associated with the first external
interface and the memory device has a second encrypting unit which is
associated with the second external interface so that data can be transmitted
encrypted between the first interface and the second interface. In addition, the
invention proposes a method of the type initially mentioned in which the
tachograph has a first encrypting unit which is associated with the first external
interface and the memory device has a second encrypting unit which is
associated with the second external interface and data which are transmitted
from

the tachograph to the memory device are encrypted by means of the first
e'ncrypting unit before the transmission and data which are transmitted from the
memory device to the tachograph are encrypted by means of the second
encrypting unit before the transmission. Compared with the known digital
tachograph, both the arrangement according to the invention and the method
according to the invention have the serious advantage that mechanical
protection against manipulations, particularly a protection of electrical contacts of
the first interface and the second interface, is obsolete. Due to the elimination of
the very complex chip card mechanism for pulling in and delivering the data
card, the costs are considerably lowered and the space required by the device is
distinctly reduced. The keys for ejecting the chip cards needed in a conventional
digital tachograph are no longer required which advantageously creates further
space on the front panel for additional operating elements. In addition, the life of
the overall device is no longer limited by the sensitive mechanism. According to
the invention, the protection against manipulation is exclusively provided by the
encryption before the data transmission. Picking up electrical signals with
manipulatory intent, therefore, will not lead to the desired success. The second
memory of the external memory device can be suitably between 32 MBytes and
2 GBytes. Memory space not needed for the core application can be suitably
used for other applications. The encryption can be carried out advantageously by
means of triple-DES (data encryption standard) and asymmetric RSA encryption
algorithms.
Thus, there is provided according to the invention a system for transmitting data
from a tachograph, comprising a tachograph which stores driver-related data

digitally in an internal first memory the tachograph comprising a USB socket, a
mobile external data memory device which has a second memory, the mobile
external data memory device comprising a USB plug configured to be plugged
directly into the USB socket of the tachograph so that data can be transmitted
between the USB socket and the USB plug at a location physically inside the
tachograph, wherein the second memory contains driver information, a driver
authentication code, and a unique encryption key; wherein the tachograph has a
first encrypting unit which is associated with the USB socket and the data
memory device has a second encrypting unit which is associated with the USB
plug so that data can be transmitted encrypted with the unique encryption key
between the USB socket and the USB plug after a driver correctly inputs the
driver authentication code contained in the second memory.
An advantageous development of the invention provides that the first external
interface and the second external

interface are constructed in such a manner that they can form a plug-in
connection with one another via which data can be transmitted. Such an
embodiment is particularly simple and rugged and can be carried out by means
of relevant plug-in connections, for example, the plug-in connection can be
constructed as RS232. Such a plug-in connection is particularly suitably
constructed as USB (universal serial bus) connection wherein, in particular, the
first interface at the tachograph can be constructed as socket and the second
interface at the memory device ca be constructed as plug. The construction as
USB interface results in an advantageously high transmission rate and, at the
same time, this arrangement is particularly rugged mechanically, particularly if,
as preferred, the socket is arranged at the tachograph and the plug is arranged
at the external memory device. In this manner, there is no element protruding at
the tachograph either. A further increase in stability and additional increase in
the life of the overall arrangement is obtained when the first external interface
and the second external interface are constructed in such a manner that they
can exchange data with one another cablelessly. This option, which is only
obtained with the association according to the invention of encrypting units with
the interfaces has the advantage, on the one hand, that no plug-in capability for
the interface connection needs to be provided at the front panel of the
tachograph and, on the other end, it results in much more convenient handling
of both devices. For the cableless data transmission according to the
arrangement according to the invention or the method according to the
invention, the two interfaces involved can be suitably constructed as wireless
USB or Bluetooth chip arrangements. When using a wireless USB connection,
data transmission can already take place at a distance of 50m. In addition

such an arrangement is also particularly inexpensive compared with Bluetooth. A
wireless USB connection can be suitably produced in accordance with the WUSB
standard.
The data memory device can be advantageously supplied with the required
operating power by means of an integrated transponder.
To obtain limitless flexibility, the external memory device, in turn, can have an
exchangeable storage medium so that, in particular, driver-related data can also
be moved independently of the external memory device. In this manner, the
external memory device can essentially have the function of an adapter or of a
terminal for transmitting data from the memory of a tachograph to an
exchangeable storage medium, wherein the external storage medium essentially
takes over the function of encryption. A further advantage of this arrangement
lies in the fact that the memory device now only needs to be provided for each
tachograph in operation and It is no longer necessary for each user to have a
separate device.
So that the user can conveniently check the correct operation of the memory
device, it is suitable if the latter has at least one light-emitting means which
emits light or flashes depending on whether a data transmission is taking place.
A second light-emitting means could be additionally used as indicator for a
correct voltage supply.
Particularly in the case where the two interfaces are constructed as plug-in
connection, it is suitable if this connection is constructed in such a manner that
the memory device is supplied with operating power from the tachograph. In
this

manner, the correct operation is no longer dependent on the charge state of a
battery in the memory device.
To avoid false associations of memory devices with vehicles or drivers, it is
appropriate if man-readable information is applied as print on the memory
device. This can be, for example, an identification number which is allocated to
the vehicle driver. For particularly convenient handling, the external memory
device is suitably constructed in small format and provided at the place where
the printed-on man-readable information is located with a transparent layer
domed in the direction of a reader, which allows the print to appear optically
larger and thus facilitates the reading. So that an unauthorized user does not
obtain access to encrypted data, either, it is suitable that after a connection has
been established between the first interface and the second interface, the
tachograph requests a user to input a code by means of which the user
authenticates himself. It is only after this authentication code has been input
correctly that data transmission is possible.
In the text which follows, the invention is explained in greater detail by means of
two exemplary embodiments, referring to the accompanying drawing in which:
Figure 1 - shows a diagrammatic representation of an arrangement according to
the invention comprising a digital tachograph and an external memory device
which can be connected to one another by means of a plug-in connection,

Figure 2 - shows an arrangement comprising a digital tachograph and an
external memory device in a diagrammatic representation with cableless data
transmission, and
Figure 3 - shows a diagrammatic representation of the operating of an
arrangement according to the invention and of the method according to the
invention, respectively.
The arrangements 1 according to the invention, shown in figures 1 and 2,
comprise a digital tachograph 2 and in each case an external data memory
device 3. The digital tachograph 2 is shown in a front view, a front panel 4
exhibiting a printer drawer 5, various operating elements 6, a display 7 and two
first interfaces 9 constructed as socket 8.
The data memory device 3 is provided with a second interface 10 constructed as
plug 11 which corresponds with the first interface 8 in such a manner that
plugging the plug 11 into the socket 8 establishes a plug-in connection and
contacts of the first interface 9 establish an electrically conductive connection
with contacts of the second interface 10. The resultant plug-in connection 13 is
constructed as universal serial bus.
The data memory device 3 is equipped with a light-emitting means 15 which, by
flashing, indicates to a user that a data transmission is taking place.
The exemplary embodiment of the invention, shown in figure 2, essentially
corresponds to that of figure 1, wherein

the first interface 9 and the second interface 10 exchange data with one another
by means of a cableless connection 20.
The data memory device 3 is provided with writing 61 covered with a transparent
layer 60 domed in the direction of a reader. The layer 60 optically enlarges the
writing 61 in a manner comparable to a lens.
In the diagrammatic representation of the operational relationships of the
arrangement 1 of figure 3, the tachograph 2 has a connection 20 to the data
memory device 3 for data transmission. The tachograph 2 has a first processor
30 which has a controlling, monitoring or regulating connection to a first memory
31, a first encrypting unit 32 and a first interface 9. The data memory device 3
similarly has a second processor 40 which has a controlling regulating or
monitoring connection to a second memory 41, a second encrypting unit 42 and
the second interface 10. The second memory 41 is a storage medium 45 which
can be separated from the data memory device 3. Data 50 transmitted by the
tachograph 2 are conveyed under control of the first processor 30 from the first
memory 31 to the first encrypting unit 32 where they are encrypted and then
transferred from the first interface 9 to the second interface 10. Analogously, the
second processor 40 controls a process in the data memory device 3 so that data
50 from the second memory 41, before being conveyed from the second
interface 10 to the first interface 9, are first encrypted in the second encrypting
unit 42.

WE CLAIM
1. A system (1) for transmitting data from a tachograph, comprising:-
a tachograph (2) which stores driver-related data (50) digitally in an
internal first memory (31), the tachograph (2) comprising a USB socket
(8);
a mobile external data memory device (3) which has a second memory
(41), the mobile external data memory device (3) comprising a USB plug
(11) configured to be plugged directly into the USB socket (8) of the
tachograph (2) so that data (50) can be transmitted between the USB
socket (8) and the USB plug (11) at a location physically inside the
tachograph (2),
wherein the second memory (41) contains driver information, a driver
authentication code, and a unique encryption key;
wherein the tachograph (2) has a first encrypting unit (32) which is
associated with the USB socket (8) and the data memory device (3) has a
second encrypting unit (42) which is associated with the USB plug (11) so
that data (50) can be transmitted encrypted with the unique encryption
key (32) between the USB socket (8) and the USB plug (11) after a driver
correctly inputs the driver authentication code contained in the second
memory (41).

2. The system as claimed in claim 1, wherein the USB socket (8) and the
USB plug (11) are constructed in such a manner that they can be
exchanged data (50) with one another cablelessly.
3. The system as claimed in claim 1, wherein the data memory device (3)
has an exchangeable storage medium (45).
4. The system as claimed in claim 1, wherein the data memory device (3)
has at least one light-emitting means (15) which emits light or flashes
depending on whether a data transmission is taking place.
5. The system as claimed in claim 1, wherein a connection (13) between the
USB socket (8) and the USB plug (11) is constructed in such a manner
that the data memory device (3) can be supplied with operating power by
means of the connection (20).
6. The system as claimed in claim 1, wherein man-readable information is
applied as print on the data memory device (3).
7. The system as claimed in claim 1, wherein the printed-on-man-readable
information is provided with a transparent layer (60) domed in the
direction of a reader, which allows the print to appear optically larger.

ABSTRACT

TITLE "A SYSTEM FOR TRANSMITTING DATA FROM A TACHOGRAPH"
The invention relates to a system (1) for transmitting data from a tachograph,
comprising a tachograph (2) which stores driver-related data (50) digitally in an
internal first memory (31), the tachograph (2) comprising a USB socket (8); a
mobile external data memory device (3) which has a second memory (41), the
mobile external data memory device (3) comprising a USB plug (11) configured
to be plugged directly into the USB socket (8) of the tachograph (2) so that data
(50) can be transmitted between the USB socket (8) and the USB plug (11) at a
location physically inside the tachograph (2), wherein the second memory (41)
contains driver information, a driver authentication code, and a unique
encryption key; wherein the tachograph (2) has a first encrypting unit (32) which
is associated with the USB socket (8) and the data memory device (3) has a
second encrypting unit (42) which is associated with the USB plug (11) so that
data (50) can be transmitted encrypted with the unique encryption key (32)
between the USB socket (8) and the USB plug (11) after a driver correctly inputs
the driver authentication code contained in the second memory (41).

" A SYSTEM FOR TRANSMITTING DATA FROM A TACHOGRAPH"

Documents:

Inventors:

PCT Conventions: