Abstract: It is provided a method for configuring a target device. The method comprises the steps of: transmitting a configuration request message to the target device, the configuration request message comprising a configuration request and a request signature, wherein the request signature is based on the configuration request; receiving a configuration response message from the target device, the configuration response message comprising a configuration response and a response signature, wherein the response signature is based on the configuration response and the request signature; verifying the response signature to determine whether the configuration response message is valid, based on the configuration response, the request signature and a public key for the target device; and transmitting a configuration commit message to the target device only when the configuration response message is valid, the configuration commit message comprising a configuration commit indicator and a commit signature.

Abstract: It is provided a method performed by a key device for supporting duress signalling. The method comprises the steps of: determining that a user is under duress; entering a wait state after the step of determining that a user is under duress; exiting the wait state and establishing a communication channel with a lock device, the communication channel being intended to be used for access control signalling; generating a duress signal; and transmitting, over the communication channel, the duress signal to the lock device.

Abstract: It is provided a method performed by a key device for supporting duress signalling. The method comprises the steps of: determining that a user is under duress; entering a wait state after the step of determining that a user is under duress; exiting the wait state and establishing a communication channel with a lock device, the communication channel being intended to be used for access control signalling; generating a duress signal; and transmitting, over the communication channel, the duress signal to the lock device.