A mobile commissioning device for assisting in the commissioning of wireless public-key encrypted networks, the device being provided with: means for reading the public key from a network node to be integrated in the wireless network, the channel for reading the public key being physically different to the wireless network channel for which the node is to be commissioned, means for at least temporarily storing the read public key in the device, means for transferring a public key of the commissioning device to the network node to be commissioned, the channel for transferring the public key preferably being the wireless channel for which the node is to be commissioned, and means for transferring the read public key to a trust center.