Modified ElGamal Cryptosystem. - Daisuke Nakamura; Kunikatsu Kobayashi (ISW, 1997)

A factoring algorithm using quadratic residue. - Qian Li; Kunikatsu Kobayashi (Int. J. Comput. Math., 2000)

Foreword. - Kunikatsu Kobayashi (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2003)

Knapsack Cryptosystem on Elliptic Curves. - Koichiro Noro; Kunikatsu Kobayashi (IACR Cryptol. ePrint Arch., 2009)

A knapsack cryptosystem based on multiple knapsacks. - Kunikatsu Kobayashi; Kohtaro Tadaki; Masao Kasahara; Shigeo Tsujii (ISITA, 2010)