An analog speech scrambling system using the FFT technique with high-level security. - Akira Matsunaga; Keiichiro Koga; Michihisa Ohkawa (IEEE J. Sel. Areas Commun., 1989)

Overview of "Keitai" (Mobile Phone) Services in Japan. - Akira Matsunaga (ISWC, 2005)

Security Evaluation of a Type of Table-Network Implementation of Block Ciphers. - Akira Matsunaga; Tsutomu Matsumoto (ASIAN, 2006)

Measurement and Modeling of Propagation Characteristics for an Indoor Environment in the 28 GHz-band. - Satoshi Ito; Takahiro Hayashi; Kosuke Yamazaki; Masahiko Nakao; Seiichiro Sakai; Yoko Kurosawa; Akira Matsunaga; Kyohiro Yoshida (PIMRC, 2019)