ER-SHUO ZHUANG1,4, CHUN-I FAN1,2,3,+ AND CHIA-YU LIN1,*
1Department of Computer Science and Engineering
2Information Security Research Center
3Intelligent Electronic Commerce Research Center
National Sun Yat-sen University
Kaohsiung, 804 Taiwan
E-mail: zhuanges@gmail.com4; cifan@mail.cse.nsysu.edu.tw+; xcvb880224@gmail.com*