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As security technology (ST) becomes specialized and fragmented, it is easy to lose sight that many topics in ST have common threads and because of this, advances in one sub-discipline may transmit to another. The presentation of results between d- ferent sub-disciplines of ST encourages this interchange for the advancement of ST as a whole. Of particular interest is the hybrid approach of combining ideas from one discipline with those of another to achieve a result that is more significant than the sum of the individual parts. Through this hybrid philosophy, a new or common pr- ciple can be discovered which has the propensity to propagate throughout this mul- faceted discipline. This volume comprises the selection of extended versions of papers that were p- sented in their shortened form at the 2008 International Conference on Security Te- nology (http://www.sersc.org/SECTECH2008/) and 2009 Advanced Science and Te- nology (http://www.sersc.org/AST2009/). We would like to acknowledge the great effort of all in the SecTech 2008 and AST 2009 International Advisory Board and members of the International Program Committee, as well as all the organizations and individuals who supported the idea of publishing these advances in security technology, including SERSC (http://www.sersc.org/) and Springer. We would like to give special thanks to Rosslin John Robles, Maricel O. Balitanas, Farkhod Alisherov Alisherovish, Feruza Sattarova Yusfovna. These graduate school students of Hannam University attended to the editing process of this volume with great passion.
