A Communication Model in Multilevel Security Network Using Quantum Key

The integrity and confidentiality of the multilevel security communication are guaranteed by using the key obtained from key negotiation process. To ensure the safety of this process is very important. The quantum key distribution process is unconditionally secure. This paper uses this process to distribute the authentication keys and the session keys, which are used in IPSec process. Thus, the method to realize multilevel secure communication by using quantum key and IPSec is given. It adds a field to implement the control strategy based on the security of the packet, uses a key effective time to meet the different security requirements, and uses the "one-time-pad" algorithm to provide unconditional security. After the rules of using keys are given, the process of transmitting data packets is described.