Wireless networking is a growing field thanks to recent advances in mobile and wireless device technologies. Secure communication between wireless hosts is necessary in certain applications and GPS-based encryption complements traditional encryption techniques by restricting the decryption of a message to a particular geographical area and time period. Existing geo-encryption techniques have limited support for mobile nodes. Therefore, we propose a mobility model for existing geo-encryption techniques that allow mobile nodes to exchange 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 and optimizing the goals of secure wireless communication.
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