Physical-layer secrecy with DS/SS from piecewise linear chaotic Markov maps: analysis and design. - Yongsun Hwang; Haralabos C. Papadopoulos (WCNC, 2003)

Private communication over fading channels with chaotic DS/SS. - Yongsun Hwang; Haralabos C. Papadopoulos (ICASSP (4), 2004)

Physical-layer secrecy with chaotic DS/SS: unintended receiver performance analysis and system design. - Yongsun Hwang; Haralabos C. Papadopoulos (ICC, 2004)

Physical-layer secrecy in AWGN via a class of chaotic DS/SS systems: analysis and design. - Yongsun Hwang; Haralabos C. Papadopoulos (IEEE Trans. Signal Process., 2004)