Space User Data Network, Network Security Design And Implementation

The article analyses the network's total requirements and system design of Spacecraft Data Network. Combining with project practice of Spacecraft Data Network, using VPN technology, the strategy of building VPN, MPLS technology, the MPLS label exchange technology, VPN-IPV4 protocol used in the MPLS layer and the process of digital MPLS transfers on the net, the article gathers up a way how to realize the safe VPN on network. Next, the article synthesizes present advanced technology of decryptions, and points out a way of system design for safe communicate between the embed devices. At last, the article describes the base of Windows2000' public key and provides some advices for users of Windows2000.At the project practice of Spacecraft Data Network, the Spacecraft Data Network not only adopted military cipher machines and PCI cards, but also integrated the safety check of operating system. Beside this, there are some safety measures like VPN technology, encryption technology, CHAP validates user's figure, the user's popedom which based on the SSL technology and the small granularity visiting control, made the Spacecraft Data Network safety reach the requirement of design.