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中文摘要：
针对现有随机密钥预分配方案中不同节点间能够建立相同共享密钥的不足，提出了一种基于多项式的异构无线传感器网络密钥预分配方案。从网络连通性、节点内存需求和安全性等方面对方案进行性能评价和模拟仿真。结果表明，本方案能够有效地提高网络的连通性，减小节点所需的存储空间，并增强网络抗攻击能力。
英文摘要：
Key management is one of the most challenging security problems in wireless sensor networks. Most of the existing key management schemes is supposed used in homogeneous wireless sensor networks in which all the sensor nodes have the same structure and capability. But the homogeneous wireless sensor network does not good at improving the network＇s life time as well as connectivity. Since there are some different nodes that can establish the same pairwise key between them in some random key pre-distribution schemes, a key management scheme is proposed based on polynomial for heterogeneous wireless sensor networks （HWSN）. From the simulations, it is clear that the key management scheme proposed can substantially improve the network connectivity with low storage requirement and enhance the network security level.
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