Tatsuaki Okamoto has been working for Nippon Telegraph and Telephone Corporation (NTT) in the research and development of cryptography, information security, natural language processing and network architectures. He has assumed the leading roles for several projects on electronic money, electronic voting, public-key infrastructures (PKI), cryptographic algorithms, machine translation of natural languages, and standardization. He is a (co-)author of more than 150 academic papers and a (co-)inventor of a number of patents. Dr. Okamoto served as President of the Japan Society for Industrial and Applied Mathematics (JSIAM) in 2007-2008, Director of International Association of Cryptology Research (IACR) in 1999-2001, Director of the Institute of Electronics, Information and Communication Engineers, Japan (IEICE) in 2001-2003, and program chair of many international conferences. He has been a member of several advisory committees for the Japanese government, and a guest professor of the Graduate School of Informatics, Kyoto University, Japan. Dr. Okamoto received the best achievement award (Kobayashi memorial award) from the IEICE in 1993, the distinguished research award from the Science and Technology Agency, Japan in 1997, the Certicom ECC Technology Award in 2007, the 2009 distinguished lecturer award from the IACR, Medal with Purple Ribbon, Japan in 2012, and RSA conference award (mathematics) in 2017. He received his undergraduate, master's, and doctor degrees in engineering of applied mathematics from the University of Tokyo, Japan.