My current research interests mainly focus on the study of multimedia and security for resource-limited (visual) sensors and mobile devices. The topics include (1) Distributed video coding and Compressive sensing; (2) Secure media hashing; and (3) wireless sensor network security.

        In low-complexity video coding adaptive to resource-limited or mobile devices, I am currently conducting a three-year NSC project -- 「Advanced Distributed Video Coding」(2008/8~2011/7)。The objectives are threefold: (a) develop a power-rate-distortion (PRD) model-based resource allocation strategy for Distributed Video Coding (DVC); (b) achieve actual low-complexity video capture and encoding by joint compressive sensing and DVC called distributed compressive video sensing (DCVS); (c) investigate the sparsity of video and dynamic measurement rate allocation for DCVS.

        In secure media hashing, the main research issues involve (a) study of security of image/video hashing; (b) design of media hashing in the homomorphic encryption domain; and (c) secure retrieval and (near-) duplicate detection of image/video.

        In wireless sensor network security, I am currently conducting a three-year NSC project -- 「Security and Authenticity in Data Forwarding of Wireless Sensor Networks」(2009/8~2012/7)。The objectives include: (a) key distribution; (b) secure aggregation; and (c) en-route filtering.