刘美华1,田茂1,陈小莉1,张新晨2.一种用于信息隐蔽传输的高效DTN路由算法[J].湖南大学学报:自然科学版,2019,(8):124~131
一种用于信息隐蔽传输的高效DTN路由算法
An Efficient DTN Routing Algorithm for Covert Transmission of Information
  
DOI:
中文关键词:  延迟容忍网络  传输隐藏  路由算法  副本数控制  转发策略
英文关键词:Delay Tolerant Network(DTN)  transmission hiding  routing algorithm  control of message copies  forwarding strategy
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作者单位
刘美华1,田茂1,陈小莉1,张新晨2 (1. 武汉大学 电子信息学院湖北 武汉 430072 2. 华中师范大学 物理科学与技术学院湖北 武汉 430079) 
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中文摘要:
      作为一种间歇性连接的网络,延迟容忍网络(DTN)中的消息通过节点间的机会性相遇完成投递,这种多跳、随机的传递方式使得消息难以被追踪,因此DTN非常适合实现信息的隐蔽传输.然而在DTN中节点之间的连接频繁断开限制了传输效率,且现有的DTN路由并未针对隐蔽传输的安全性进行相关研究.为保证隐蔽传输的通信质量和安全性,提出一种路由算法,首先利用节点的静态社会特征和实时相遇情况设计一种高效的消息转发策略以提高消息的投递效率;其次考虑到过多的消息副本在增加投递概率的同时也会增加暴露的风险,根据网络连通情况对副本数进行了动态设置.最后,将提出的算法与DTN经典算法进行仿真对比,结果显示本算法能够提高DTN的消息投递率,减少网络开销,同时提高消息的安全性.
英文摘要:
      The Delay Tolerant Network (DTN), as an intermittently connected network, transfers messages through opportunistic encounters between nodes. It is difficult to intercept messages because of the multi-hop and random delivery method, which shows that DTN is very suitable for covert transmission of information. However, it also limits transmission efficiency. In order to develop transmission efficiency and to guarantee the security of covert transmission, a routing algorithm was proposed. Firstly, an efficient message forwarding strategy was designed to improve the delivery efficiency of messages by utilizing the static social characteristics and real-time encounters of nodes. Secondly, because massive copies of message lead to high probability of delivery but also reduce the security of covert transmission, the number of copies was dynamically set according to the topology of the network. Finally, the proposed algorithm was simulated. Compared with the classical DTN algorithm, the simulating results show that the proposed algorithm can improve the message delivery rate of DTN,reduce network overhead, and increase the security of messages.
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