Threshold key management protocol in mobile ad hoc networks using an ID-based signcryption scheme

Threshold key management as a notable key management in a mobile ad hoc network is facing considerable technical challenges now. For design secure and efficient key management protocol in a mobile ad hoc network, in this paper, we give a new ID-based signcryption scheme which is efficienct in terms of both the communication overhead and the computational requirement. Furthermore, we apply our ID-based signcryption scheme into threshold key management. As a result, a system private key share refreshing protocol in threshold key management of a mobile ad hoc network is proposed. This protocol improves the security and efficiency of the previous protocols in a mobile ad hoc network owing to our ID-based signcryption scheme.