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In this paper we present our work on a combination of two approaches for wireless sensor networks (WSNs), to provide a self contained, reliable and secure shared memory middleware with security management. The shortECC is a lightweight and short key cryptosystem that requires management layer for its parameters and tinyDSM is a middleware that provides a shared memory abstraction. The combination of these two approaches is a kind of symbiosis, where the tinyDSM is used by the shortECC for the management and distribution of its parameters within a trusted group while using the security means provided by the latter. This symbiosis ensures secured tinyDSM data exchange and reliable management of the shortECC parameters at almost no additional cost and is competitive when compared to AES or standard elliptic curves cryptography.