@ARTICLE{Li:ChaoticCipher:PLA2004, author = {Shujun Li and Guanrong Chen and Kwok-Wo Wong and Xuanqin Mou and Yuanlong Cai}, title = {{Baptista}-type chaotic cryptosystems: Problems and countermeasures}, journal = {Physics Letters A}, year = {2004}, volume = {332}, number = {5-6}, pages = {368-375}, doi = {10.1016/j.physleta.2004.09.028}, note = {preprint available online at \url{http://www.hooklee.com/pub.html}}, }