针对无线传感器网络密钥管理中连通性、效能及安全性不足问题，基于阶层式无线传感器网络与二元对称多项式提出ESKDM （Efficient and Scalability Key Distribution Mechanism）方案。该方案通过运用多项式的特性，使传感器节点之间只需透过ID的信息交换即可建立密钥。相较于同类方案，ESKDM方案大幅度的降低传感器节点的通信成本，并完全抵抗节点捕获攻击。无论网络节点的大小，一般节点所需要储存的秘密信息都为固定的信息，能够支持大型的WSN。也提出在新增节点的同时，不需要在线的基站存在，更能适用于实际应用。%Key pre‐distribution scheme is related to the corporative security between the nodes in wireless sensor net‐work .Most of the existing key pre‐distribution schemes have the shortcomings such as low connectivity‐poor resistance and scalability .This paper further proposes a hierarchical sensor network key pre‐distribution scheme ESKDM (Efficient and Scalability Key Distribution Mechanism) by symmetric bivariate polynomial function .Theoretical analysis and simulation re‐sults show that the ESKDM scheme has good performances in the security connectivity rates ,resistance ,flexibility and other aspects.
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