Patent ID: 8200984

Claim:
A system comprising: a tachograph which stores driver-related data digitally in an internal first memory, the tachograph including a USB socket; a mobile external data memory device which has a second memory, the mobile external data memory device including 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 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 only after a user manually inputs a correct authentication code in order to authenticate the user, and wherein the USB socket and the USB plug are constructed in such a manner that they can exchange data with one another cablelessly.