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With the development of network, users' demand on network change persistently. Malpractices of the traditional network stand out increasingly, and have limited the further developing of network. The active network is a new type of networks proposed recently for overcoming drawbacks of traditional network. Active network is a new network in that the users may make programming about its intermediate network nodes, on one hand it enhanced the performance of network application; on the other hand it also brought new threat to network node security and stability. In this paper, we analyzed and studied the communication features in active network. Besides, our research includes the active network safety problem and ground on this we put for a design plan which achieved the secure communication in Active Network.