He was a professor at the Max Planck Academy of Sciences in Germany and the chief scientist of GEMPLU in France. He has edited three academic papers on international password applications and information security conferences. He has published dozens of computer and security and password academic papers at home and abroad. His algorithm was collected in the internationally renowned book - HANDBOOK OF APPLIED CRYPTOGRAPHY. Established a company that mainly focuses on information security at domestic and abroad. He is now the "National Specialized Expert" of the Organization Department of the CPC Central Committee and the Ministry of Personnel Resources and Social Security, the expert of Beijing Haiju Engineering, and the high-end leading talent of Zhongguancun. He is also the founder of three international conferences, ICICS, ACNS and Intrust, and a member of the Steering Committee. He and Academician Shen Changxiang led the research and formulation of the series of trusted computing standards in China.