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The Active Network is a new type network architecture which intermediate node could be programmed. However, its architecture feature bring many security problems which embarrassed the development of active network greatly. This context analyze and studies the characteristics of active network communication and the security problems exist in the process. At the same time, we put forward a safe communication approach of non-certificated signcryption which not only realized the authentication, encryption and decryption of data in traditional communication, but also solve the problems in the public key cryptography effectively such like certificates and secret-key escrow etc.