中文摘要：

Huang Wenjun, received BSc and MSc from Harbin Institute of Technology （ HIT）, Harbin, China in 2001 and 2004, respectively. He is a PhD candidate in the Information Security Technique Research Center, Harbin Institute of Technology Shenzhen Graduate School. He is currently working toward his PhD degree as exchange student at the Security Technology Department of Fraunhofer Institute for Computer Graphics Research IGD in Germany. His research interests include information security and biometric recognition. E-mail ： wenjun.huang@ igd. fraunhofer.de ; wenjun.huang@ict. hit. edu. cn Zhou Xuebing, studied electrical engineering in the University of Technology, Darmstadt. Since 2005 she has been working as a research assistant at the Security Technology department of Fraunhofer Institute for Computer Graphics Research IGD in Germany.Her research interests include biometrics and video processing. She has been working on several European and national projects like Axmedis, 3D Face and BioFinger Ⅱ. E-mail ： xuebing.zhou@igd. fraunhofer. de Prof. Dr. Xiamu Niu （ doctoral advisor） , professor in computer science in Harbin Institute of Technology, superintendent of Information Countermeasure Technique Research Institute （ICT） Director of Information Security Technique Research Center （ISeC） Shenzhen Graduate School, Harbin Institute of Technology （HIT）, He is advanced member of Chinese Institute of Electronics, IEEE member, ACM member, SPIE member, expert of National 863 Program. His current research fields are information security technique, cryptography, information hiding technique, secure communication technique, signal processing and image processing.