An object-based non-blind watermarking that is robust to non-linear geometrical distortion attacks. - Toshihiko Yamasaki; Yasumasa Nakai; Kiyoharu Aizawa (ICIP, 2009)

A Generic Construction of Timed-Release Encryption with Pre-open Capability. - Yasumasa Nakai; Takahiro Matsuda 002; Wataru Kitada; Kanta Matsuura (IWSEC, 2009)

Efficient Generic Constructions of Timed-Release Encryption with Pre-open Capability. - Takahiro Matsuda 002; Yasumasa Nakai; Kanta Matsuura (Pairing, 2010)