Title	Watermark Embedded in Polygonal Line for Copyright Protection of Contour Map
Author	Xu Zhou, Yu Ren, Xuezeng Pan
Citation	Vol. 6  No. 7  pp. 202-205
Keywords	Digital watermark, Contour map, Polygonal line, Parameterized circle, Hypothesis test

Title	All-optical Switch and Hard Limiter device using a Twin Defects in Two-dimensional Nonlinear Photonic Crystals
Author	Ali Rostami, Hamed Alipour
Citation	Vol. 6  No. 7  pp. 206-210
Keywords	All-optical switching, Twin Defect layers, Nonlinear Photonic Crystals, Hard Limiter

Title	Task-Role Based Dual System Access Control Model
Author	Cui-xiao Zhang, Ying-xin Hu
Citation	Vol. 6  No. 7  pp. 211-215
Keywords	Access Control, Task, WorkFlow, TRBAC

Title	Security Enhancements for Mobile Agents Platforms
Author	HAMED AOUADI, PR MOHAMED BEN AHMED
Citation	Vol. 6  No. 7  pp. 216-221
Keywords	Mobile agents, cryptography, security, SVM