Cryptographic works of Dr. Kenji Koyama: In memoria

Dr. Kenji Koyama, one of the most respected and prominent Japanese research ers in modern cryptography, passed away on March 27, 2000. He left behind h im many outstanding academic achievements in cryptography as well as other areas such as emotion transmission theory, learning and mathematical games. In this manuscript, with our deepest sympathy and greatest appreciation fo r his contribution to our society, we introduce his major works mainly in c ryptography, although his papers in other areas are included in the bibliog raphy list.