Method and device for challenge-response authentication

Method of performing a challenge-response process, comprising, in this sequence, the steps of

• a) providing a first challenge-response pair on a source device, wherein the first challenge-response pair is assigned to one or more responding devices;
• b) loading the first challenge-response pair from the source device to a challenging device, while the source device is operationally connected to the challenging device;
• c) performing a challenge-response process between the challenging device and one of the one or more responding devices to which the first challenge-response pair is assigned, using the first challenge-response pair, which is assigned to the responding device;
• d) loading one or more second challenge-response pairs from a source device to the challenging device, while the source device is operationally connected to the challenging device,
• characterized in that the step of loading the first challenge-response pair from the source device to a challenging device is performed before the challenging device has received any information from one of the responding devices, to which the first challenge-response pair is assigned.