中文摘要：

YAIVG Li, Researcher, State Key Laboratory of Infor-mation Security, Institute of Information Engineering, Chinese Academy of Sciences, China. His current research interests include quantum cryptography and quantum computation. XIANG Chong, Ph.D. candidate, State Key Laboratory of Information Security, Institute of Information En gineering, Chinese Academy of Sciences, China. His current research interest is quantum cryptography. LI Bao, Researcher, State Key Laboratory of Informa-tion Security, Institute of Information Engineering, Chinese Academy of Sciences, China. His current research interests include foundations of cryptogra- phy, public key cryptography, and secure protocols.