Method for reading an identification document in a contactless manner

1. A method for the contactless readout of an electronic identification document by means of a terminal;

wherein the identification document comprises:

a microprocessor;

a data memory, wherein identification data are stored in encrypted form, decryptable with a data key; and

a key memory that is physically separate from the data memory, and that is accessible for the microprocessor and wherein the data key is stored;

wherein in the method,

in a data reading step the encrypted identification data are transmitted from the data memory of the identification document to the terminal,

in a key reading step the data key is transmitted from the key memory of the identification document to the terminal, and

in a decryption step in the terminal the identification data are decrypted with the data key;

wherein the data reading step is carried out employing a long-range radio connection, and the key reading step is carried out employing a short-range radio connection, wherein in the key reading step, before the data key is transmitted to the terminal, a second authentication process is carried out, wherein at least one authentication is carried out between the microprocessor chip and the terminal, and further a key-transport key is computed for encrypting the data key that is to be transmitted to the terminal, and the data key is encrypted with the key-transport key;

wherein the key reading step carried out on the short-range radio connection is performable independent of performance of the data reading step carried out on the long-range radio connection, and

wherein the short-range radio connection has exclusive access to the key memory of the identification document, preventing any access of the key memory using the long-range radio connection.

2. The method according to claim 1 , wherein as long-range radio connection a radio connection with a range from the area of approximately 1 meter to approximately a few hundred meters is provided and/or with an operating frequency from the area of approximately 0.3 GHz to approximately 10 GHz.

3. The method according to claim 1 , wherein as short-range radio connection a radio connection with a range from the area of approximately 1 centimeter to approximately 15 centimeters is provided and/or with an operating frequency from the area of approximately 3 MHz to approximately 20 GHz.

4. The method according to claim 1 , wherein the data memory is accessible for the microprocessor or a further microprocessor, and

in the data reading step, before the identification data are transmitted to the terminal, a first authentication process is carried out, wherein at least one authentication is carried out between the microprocessor and the terminal or the further microprocessor and the terminal, and further a transport key is computed for encrypting the identification data to be transmitted, and the identification data are encrypted with the transport key.

5. The method according to claim 1 , wherein during a first and/or second authentication process one or several session keys are agreed between the microprocessor and/or further microprocessor and the terminal, and from at least one session key the transport key and/or key-transport key is derived.

6. The method according to claim 5 , wherein in the authentication process a mutual or unilateral authentication and Diffie-Hellman key agreement is carried out between the microprocessor chip and/or further microprocessor and the terminal, in accordance with the PACE protocol, chapter 4.2, or in accordance with chip authentication, chapter 4.3, or in accordance with terminal authentication, chapter 4.4, of the BSI TR-03110.

7. An identification document comprising:

a microprocessor;

a data memory, wherein identification data are stored or storable in encrypted form, decryptable with a data key; and

a key memory that is physically separate from the data memory, and is accessible for the microprocessor, wherein the data key is stored or storable;

wherein a long-range interface, via which a long-range radio connection can be established between the data memory and a terminal, and a short-range interface, via which a short-range radio connection can be established between the key memory and a terminal wherein establishing the short-range radio connection is performable independent of establishing the long-range radio connection;

wherein the data key or key memory is so secured that a transmission of the data key from the key memory to a terminal is possible via the short-range radio connection, wherein before the data key is transmitted to the terminal, a second authentication process is carried out, wherein at least one authentication is carried out between the microprocessor and the terminal, and further a key-transport key is computed for encrypting the data key that is to be transmitted to the terminal, and the data key is encrypted with the key-transport key; and

wherein the short-range radio connection has exclusive access to the key memory of the identification document, preventing access of the key memory using the long-range radio connection.

8. The identification document according to claim 7 , wherein the data memory is firmly integrated in the identification document, the key memory and the microprocessor are integrated on one single chip.

9. The identification document according to claim 7 , wherein the data memory and the long-range interface are arranged in an extra label attached to a main body of the identification document, wherein the label has a further microprocessor, wherein the data memory is accessible for the further microprocessor.

10. A terminal for the contactless readout of an electronic identification document according to claim 7 , wherein

a long-range terminal interface via which, using the long-range interface of the identification document, a long-range radio connection can be established to the data memory of the identification document, and

a short-range terminal interface, via which, via the short-range interface of the identification document, a short-range radio connection can be established to the key memory of the identification document.