@ARTICLE{Li:Rules:IJBC2006, author = {Gonzalo \'{A}lvarez and Shujun Li}, title = {Some Basic Cryptographic Requirements for Chaos-Based Cryptosystems}, JOURNAL = {International Journal of Bifurcation and Chaos}, volume = {16}, number = {8}, YEAR = {2006}, pages = {2129-2151}, doi = {10.1142/S0218127406015970}, note = {preprint available online at \url{http://www.hooklee.com/pub.html}} }