Liu Xiang, Huang Jie, Gao Xiang
School of Information Science and Engineering, Southeast University, Nanjing 210096, China.
Sensors (Basel). 2017 May 16;17(5):1133. doi: 10.3390/s17051133.
In wireless sensor networks, nodes are mostly deployed in unsupervised areas and are vulnerable to a variety of attacks. Therefore, data security is a vital aspect to be considered. However, due to the limited computation capability and memory of sensor nodes, it is difficult to perform the complex encryption algorithm, as well as the key distribution and management algorithm. Toward this end, a low-complexity algorithm for security in wireless sensor networks is of significant importance. In this article, a weakly secure network coding based multipath routing scheme is proposed, which can guarantee the data confidentiality in transmission probabilistically, and can improve the energy efficiency in the meantime. Then the simulations of the probability of transmission being secure are performed. The results show that with the increase of the number of hops , the probability of transmission being secure suffers from a rapid decrease. On the contrary, with the increase of multicast capacity it undergoes a slight growth. Therefore, the weak security can be achieved with probability approaching 1 by limiting the number of hops and increasing the multicast capacity. Meanwhile, the simulations of energy consumption are performed and the comparison between the energy consumption of the scheme in this article and the multipath routing scheme without network coding is conducted. The results show that by employing network coding, the scheme in this article can improve the energy efficiency, and the more packets transmitted, the more energy consumption can be reduced.
在无线传感器网络中，节点大多部署在无人监管的区域，容易受到各种攻击。因此，数据安全是一个需要考虑的重要方面。然而，由于传感器节点的计算能力和内存有限，难以执行复杂的加密算法以及密钥分发和管理算法。为此，一种用于无线传感器网络安全的低复杂度算法具有重要意义。在本文中，提出了一种基于弱安全网络编码的多路径路由方案，该方案可以概率性地保证传输中的数据机密性，同时提高能源效率。然后对传输安全概率进行了仿真。结果表明，随着跳数的增加，传输安全概率迅速下降。相反，随着多播容量的增加，它略有增长。因此，通过限制跳数和增加多播容量，可以以接近1的概率实现弱安全性。同时，进行了能耗仿真，并对本文方案与无网络编码的多路径路由方案的能耗进行了比较。结果表明，通过采用网络编码，本文方案可以提高能源效率，并且传输的数据包越多，能耗降低得越多。
