作者机构:[1]Key Laboratory of Computer Network and InformationSecurity of the Ministry of Education, Xidian University, Xi'an710071, Shaanxi, China, [2]School of Telecommunications and Information Engineering,Xi'an Institute of Posts and Telecommunications, Xi'an 710121,Shaanxi, China
相关基金:Foundation item: Supported by the National Natural Science Foundation of China (60773002), the National High Technology Research and Development Program of China (863 Program) (2007AA01Z472)