Dhananjayan Gayathri, Subbiah Janakiraman
Department of Computer Science, Bharathiar University, Coimbatore, Tamil Nadu 641046 India.
Department of Banking Technology, Pondicherry University, Pondicherry, India.
Springerplus. 2016 Jul 7;5(1):995. doi: 10.1186/s40064-016-2667-6. eCollection 2016.
Secure data transfer against the malicious attacks is an important issue in an infrastructure-less independent network called mobile ad-hoc network (MANET). Trust assurance between MANET nodes is the key parameter in the high-security provision under dynamic topology variations and open wireless constraints. But, the malicious behavior of nodes reduces the trust level of the nodes that leads to an insecure data delivery. The increase in malicious attacks causes the excessive energy consumption that leads to a reduction of network lifetime. The lack of positional information update of the nodes in ad-hoc on-demand vector (AODV) protocol during the connection establishment offers less trust level between the nodes. Hence, the trust rate computation using energy and mobility models and its update are the essential tasks for secure data delivery. This paper proposes a trust-aware ad-hoc routing (T2AR) protocol to improve the trust level between the nodes in MANET. The proposed method modifies the traditional AODV routing protocol with the constraints of trust rate, energy, mobility based malicious behavior prediction. The packet sequence ID matching from the log reports of neighbor nodes determine the trust rate that avoids the malicious report generation. Besides, the direct and indirect trust observation schemes utilization increases the trust level. Besides, the received signal strength indicator utilization determines the trusted node is within the communication range or not. The comparative analysis between the proposed T2AR with the existing methods such as TRUNCMAN, RBT, GR, FBR and DICOTIDS regarding the average end-to-end delay, throughput, false positives, packet delivery ratio shows the effectiveness of T2AR in the secure MANET environment design.
针对恶意攻击的安全数据传输是移动自组织网络（MANET）这种无基础设施的独立网络中的一个重要问题。MANET节点之间的信任保证是在动态拓扑变化和开放无线约束下提供高安全性的关键参数。但是，节点的恶意行为会降低节点的信任级别，从而导致数据传递不安全。恶意攻击的增加会导致过度的能量消耗，进而缩短网络寿命。在连接建立过程中，自组织按需距离向量（AODV）协议中节点位置信息更新的缺失使得节点之间的信任级别较低。因此，使用能量和移动性模型进行信任率计算及其更新是安全数据传递的基本任务。本文提出了一种信任感知自组织路由（T2AR）协议，以提高MANET中节点之间的信任级别。所提出的方法在信任率、能量、基于移动性的恶意行为预测的约束下修改了传统的AODV路由协议。通过对邻居节点日志报告中的数据包序列ID进行匹配来确定信任率，从而避免恶意报告的产生。此外，直接和间接信任观察方案的使用提高了信任级别。此外，利用接收信号强度指示符来确定受信任节点是否在通信范围内。将所提出的T2AR与现有方法（如TRUNCMAN、RBT、GR、FBR和DICOTIDS）在平均端到端延迟、吞吐量、误报率、数据包交付率方面进行的对比分析表明了T2AR在安全MANET环境设计中的有效性。
