中文摘要：

为了提高水声信道传输数据的安全性,针对非对称加密对节点性能要求较高的问题,提出了一种带门限的动态窗口的NAF标量乘法（DWNAF）。该方法通过＂门限＂对经典的窗口法的窗口大小进行动态控制,优化了预处理过程,有效降低了预计算和标量乘计算的开销。实验表明,在预计算量相同的情况下,DWNAF的点加次数仅为RWNAF的25%。在安全性方面,DWNAF采用窗口法、平衡能量法与masking方法相结合的方式,能有效抵御SPA,DPA及其变种RPA和ZPA等常见的边信道攻击。

英文摘要：

In order to improve the safety of the data transmission in underwater acoustic channel,in view of the fact that asymmetric encryption requires high performance of nodes,a dynamic window NAF scalar multiplication with a threshold（DWNAF）was proposed for underwater acoustic sensor networks.The method is based on the classic width-ωNAF method through a＂threshold＂for dynamic control,and it can optimize the pretreatment process and effectively reduce the pre-calculation in scalar multiplication.Experimental results show that under the same pre-calculation,the point-add in DWNAF is only 25% of that in RWNAF.In security,DWNAF adopts the combination of window method,energy balance method and masking method,which can effectively resist the common side channel attacks such as SPA,DPA and its variants RPA and ZPA.