  We propose a geo-encryption protocol that allow mobile nodes to communicate
securely by restricting the decryption of a message to a particular location
and time period. Our protocol will handle the exchange of movement parameters,
so that a sender is able to geo-encrypt messages to a moving decryption zone
that contains a mobile node's estimated location. We also present methods for
estimating the node's movement parameters to allow for geo-encryption. Finally,
we evaluate our model by measuring the induced overhead to the network and its
performance in terms of decryption ratio.
