基金Supported by the National High-Tech Research and Development Plan of China under Grant Nos.2006AA01Z445, 2006AA01Z410(国家高技术研究发展计划(863))the National Information Security Research Plan of China under Grant No.2006A30 (国家242信息安 全计划)+1 种基金the Electronic Development Fund of the Ministry of Information Industry of China under Grant No.[2006]634 (信息产业部电子发展基金)the IBM Ph.D. Fellowship Plan (IBM全球博士生英才计划)
