当将数字签名应用到广播认证时,网络很容易受到DoS(Denial of Service)攻击,比如攻击者不停地广播虚假数据包从而消耗网络的通信资源和计算资源。针对这种情况,提出一种基于弱认证和信誉等级的协议来防御此类DoS攻击。该协议针对分簇的无线传感器网络模型,利用中国剩余定理和单向函数来完成弱认证,同时还引入信誉管理机制来对节点的信誉进行分级。仿真实验表明,与P.Ning和R.Wang等提出的方案相比,本协议在安全性、有效性和防御广播认证中的DoS攻击能力等方面,均具有较好的优势。
A hyperelliptic curve digital signature algorithm （HECDSA） can be viewed as the hyperelliptic curve analogue of the standard digital signature algorithm （DSA）. This article discusses divisor evaluations, the basic HECDSA, variants, two HECDSA equations and a 4-tuple HECDSA scheme, and puts forward a generalized equation for HECDSA. From this generalized equation, seven general HECDSA types are derived based on the efficiency requirements. Meanwhile, the securities of these general HECDSA types are analyzed in detail.
YOU Lin ,SANG Yong-xuan College of Communication Engineering,Hangzhou Dianzi University,Hangzhou 310018,China
In the present paper we propose a new hierarchical management scheme within suitable extensions of 2-adic numbers, in which the subfields are treated as classes, and the communications are realized by computation on elliptic curves. The security of our system is much stronger than that of the traditional public key cryptographic systems.
