A method for preparing for handover of an apparatus from a first wireless network to a second, different wireless network, a master session key (MSK) having been generated during establishment of a connectivity of the apparatus to the first wireless network includes detecting signals of the second wireless network. In response thereto, establishing a connectivity of the apparatus to the second wireless network, using a pairwise master key (PMK) derived from the MSK generated during establishment of the connectivity to the first wireless network, one or more encryption keys being derivable from the PMK to support secure communication over the second wireless network.