Key establishment and its management in Wireless Sensor Networks(WSN) is a challenging problem due to its limited resources and disordered structure. Many key management schemes have been developed recently for WSN to provide secure communication between source and destination sensor nodes.A serious threat highlighted in all of these schemes is that of node capture attacks,where an adversary gains full control over a sensor node through direct physical access.Node capture attacks can also be helpful to an adversary in new attacks like Blackhole and Denial of Service.All of these proposed key management solutions still suffer from node capture attacks with resilience.The current sensor networks are assumed to be designed for specific applications,having key management protocols strongly coupled to applications.The future sensor networks are envisioned as comprising heterogeneous devices assisting to a large range of applications.To achieve this goal,a new application independent approach is needed. In this paper we therefore present a novel,extended version of our previously published Dynamic Group-based Key Establishment(DGKE) protocol. We compare the proposed scheme with existing key management schemes,which shows a significant improvement in resilience against node capture attacks,memory overhead and connectivity. Key establishment and its management in Wireless Sensor Networks (WSN) is a challenging problem due to its limited resources and disordered structure. Many key management schemes have been developed recently for WSN to provide secure communication between source and destination sensor nodes. in all of these schemes is that of node capture attacks, where an adversary gains full control over a sensor node through direct physical access. Detection capture can also be helpful to an adversary in new attacks like Blackhole and Denial of Service. All of these proposed key management solutions still suffer from node capture attacks with resilience.The current sensor networks are assumed to be designed for specific applications, having key management protocols strongly coupled to applications. The future sensor networks are envisioned as consisting heterogeneous devices assisting to a large range of applications.To achieve this goal, a new application independent approac h is needed. In this paper we therefore present a novel, extended version of our previously published Dynamic Group-based Key Establishment (DGKE) protocol. We compare the proposed scheme with existing key management schemes, which shows a significant improvement in resilience against node capture attacks, memory overhead and connectivity.