Information Hiding for G.711 Speech Based on Substitution of Least Significant Bits and Estimation of Tolerable Distortion. - Akinori Ito; Shun'ichiro Abe; Yôiti Suzuki (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2010)

Reinforcement of VoIP Security with Multipath Routing and Secret Sharing Scheme. - Ryouichi Nishimura; Shun'ichiro Abe; Norihiro Fujita; Yôiti Suzuki (J. Inf. Hiding Multim. Signal Process., 2010)