Key Pre-distribution Schemes based on Symplectic Geometry for Wireless Sensor Networks

Key distribution is paramount for wireless sensor networks (WSNs). The design of key management schemes is the most important aspects and basic research field in WSNs. A key distribution scheme based on symplectic geometry over fields is proposed, a 2-dimensional subspace in symplectic geometry represents a node, all 2s-dimensional non-isotropic subspaces represent key pool, and guarantees every pair of nodes has shared key, so as to improve the networks connectivity. The performance analysis shows that the scheme has good connectivity and higher resilience to node compromise compares with other key pre-distribution schemes.