1. Department of Computer Engineering; Chosun University; 309 Pilmun-daero, Dong-gu Gwangju 61452 South Korea
2. Cryptography and Cognitive Informatics Research Group; AGH University of Science and Technology; 30 Mickiewicza Avenue 30-059 Krakow Poland
3. Asia University; 500 Lioufeng Rd, Wufeng Taichung 41354 Taiwan
4. China Medical University Hospital; China Medical University; No 91, Hsueh-Shih Rd Taichung 40402 Taiwan