Abstract: The present disclosure relates to method of enabling key re-usage for an electronic device. The method comprising: receiving a request message from the electronic device, wherein the request message comprises a first information being indicative of a preference for one of a first key associated with a first network node in a first network or a second key associated with a second network node in a second network; processing the request message to determine the preference indicated in the first information; and transmitting a response message to the electronic device for reusing the first key or second key, the electronic device is configured to derive a third key based on the first key or the second key as indicated in the determined preference, and the second network is able to access to the first key and the second key whereas the first network cannot access the second key.