Ad hoc网络特性要求所采用的切换方案必须是轻量的。将中国剩余定理和分簇的思想相结合,为Ad hoc网络提出了一种新的门限签名方案,在此基础上,提出一种轻量级分簇切换方案。通过分簇的门限签名保证了簇对话密钥的真实性,设计了在簇内和簇间两种情况下的切换操作流程,实现了快速安全的切换。该方案能够灵活适应Ad hoc网络动态拓扑性,适用于各种规模的网络。数学证明和安全性分析表明,该方案具有很高的安全性,并具有抗共谋攻击的能力。 Ad hoc network characteristics require the switching scheme used must be lightweight. Combining the Chinese residual theorem with the idea of ​​clustering, this paper proposes a new threshold signature scheme for Ad hoc networks. On this basis, a lightweight clustering handover scheme is proposed. The clustering threshold signature ensures the authenticity of the cluster session key, and the switching operation flow is designed in both intra-cluster and inter-cluster scenarios to achieve fast and secure handover. The scheme can flexibly adapt to the dynamic topology of Ad hoc networks and is suitable for all kinds of networks. Mathematical proof and safety analysis show that this scheme has high security and possesses the ability to resist collusion attacks.