Method and apparatus for storing and distributing encryption keys

A method of key distribution including: generating a plurality of encryption keys and associating each encryption key with one geographical area of a plurality of geographical areas; forwarding each encryption key to one or more base stations in the geographical area associated with the encryption key; determining at least one of the plurality of geographical areas that is adjacent to a first geographical area, yielding one or more adjacent geographical areas; and forwarding an encryption key for at least one of the one or more adjacent geographical areas to at least one base station covering the first geographical area.