基于容迟网络路由的航天测控网量子密钥分配

Quantum Key Distribution in TT&C Network based on Delay Tolerant Network Routing

为提高航天测控网通信的安全性,本文将量子密钥分配技术应用于分布式航天测控网,并采用容迟网络路由策略来传递量子密钥。首先在地面站和航天器之间建立量子密钥分配系统,生成并共享密钥;随后以行进中的航天器为中介,逐段加密传送密钥;最终可使两个地面站共享量子密钥,保证信息传输的绝对安全。考虑到容迟网络的特点,本文对传染病路由算法进行改进,并应用于密钥传递过程。仿真结果表明,上述密钥分配机制可有效提高航天测控网通信的性能。

To improve the communication security of TTSK： network, this paper presents an application model of quantum key distribution technology in distributed aerospace TT＆C network with the method of delay tolerant network. It sets up the quantum key distribution system between ground station and spacecraft, and uses spacecraft to encrypt the key and transmit it as an agency to make two ground stations get shared key safely. The shared key is used to encrypt the information in public channel to keep it safe. In the process of transmitting shared key, in view of the characteristic of delay tolerant network, this paper has improved the epidemic routing algorithm and simulated it. The result shows that the efficiency of epidemic routing algorithm after improved has increased substantially.