In this paper, the authors address key management in cluster-based Mobile Ad-hoc NETworks (MANETs). They present a fully-distributed ID-based Multiple secrets Key Management scheme (IMKM). This scheme is implemented via a combination of ID-based multiple secrets and threshold cryptography. Ensuring secure communication in an ad hoc network is extremely challenging because of the dynamic nature of the network and the lack of centralized management. Their proposed analysis includes the effect of packet generation model, random deployment of sensors, dynamic cluster head assignment, data compression, and energy consumption model at the sensors.