| CPC B60R 13/10 (2013.01) [H04L 63/0428 (2013.01)] | 17 Claims |

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1. A digital license plate for a motor vehicle, the digital license plate comprising:
a display device for displaying a sequence of letters and/or digits to form a vehicle registration number,
a storage unit for storing files,
an authentication unit for authenticating a file stored in the storage unit to a predetermined source,
an encryption unit for encrypting and decrypting a file stored in the storage unit,
a transmitting and/or receiving unit for wireless or wired interaction with a server, and
a control unit configured to control the display device to display, by the display device, a vehicle registration number contained in a file in response to confirmation by the authentication unit that the file originates from the predetermined source,
wherein the encryption unit encrypts files containing vehicle registration numbers prior to transmission to a central server,
wherein the control unit is further configured to cause a vehicle registration number contained in a file to be displayed, unchanged, by the display device only within a predetermined time period, so that the continuous display of a valid vehicle registration number requires the repeated receipt and verification of the authenticity of a file containing the vehicle registration number, and
wherein the time period defining how long the display device displays the vehicle registration number contained in the file unchanged is defined by a component of the file itself, wherein the time period is 1 day, 1 week, 1 month or 1 year.
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