Patrick Traynor Raju Kumar Heesook Choi Guohong Cao Sencun Zhu Thomas F. La Porta Efficient Hybrid Security Mechanisms for Heterogeneous Sensor Networks. 663-677 2007 6 IEEE Trans. Mob. Comput. 6 http://doi.ieeecomputersociety.org/10.1109/TMC.2007.1020 db/journals/tmc/tmc6.html#TraynorKCCZP07