无线传感器网络中基于节点行为和身份的可信认证

针对无线传感器网络(WSN)开放性和资源受限导致易受外部和内部攻击以及节点失效等问题，提出了一种高效、安全的可信节点间身份认证方案。方案采用基于身份和双线性对理论实现认证密钥协商与更新，通过基于Beta分布的节点行为信誉的管理计算其信任度，利用信任度识别节点是否可信并采用对称密码体制结合信息认证码实现可信节点间认证。方案不仅能防范窃听、注入、重放、拒绝服务等多种外部攻击，而且能够抵御选择性转发、Wormhole攻击、Sinkhole攻击和女巫攻击等内部威胁。与SPINS方案相比，所提方案在同一网络环境下有较长的网络生命期、较小的认证时延、更高的安全性及可扩展性，在无人值守安全性要求较高的WSN领域具有较好的应用价值。

Node behavior and identity-based trusted authentication in wireless sensor networks

Concerning the vulnerability to attack from external and internal nodes and node failure due to openness and limited resources in Wireless Sensor Network (WSN), an efficient, secure trusted authentication scheme was proposed. The theory of identity-based and bilinear pairings was adopted in the authentication key agreement and update. The node trust value was computed by node behavior reputation management based on Beta distribution. The symmetric cryptosystem combined with message authentication code was used in certification process between trusted nodes which were identified by the trust value. The scheme not only can prevent eavesdropping, injection, replay, denial of service and other external attacks, but also is able to withstand internal threats such as the selective forwarding, Wormhole attack, Sinkhole attack and Sybil attack. The analysis and comparison with SPINS scheme show that the scheme can achieve longer network lifetime, smaller certification delay, greater security and scalability in the same network environment. The scheme has good application value in unattended WSN with high safety requirements.