We appologize for making the following mistakes in the references list. ----- Li, S., Mou, X., Yang, B. L., Ji, Z. & Zhang, J. [2003c] "Problems with a probabilistic encryption scheme based on chaotic systems," Int. J. Bifurcation and Chaos 11, 3063¨C3077. => The volume should be 13. ----- Li, S., Chen, G. & Mou, X. [2004b] ¡°On the dynamical degradation of digital piecewise linear chaotic maps,¡± Int. J. Bifurcation and Chaos 15, 3119¨C3151. => The publication year should be 2005. ----- Li, S., Alvarez, G. & Chen, G. [2005e] ¡°Return-map cryptanalysis revisited,¡± accepted by Int. J. Bifurcation and Chaos 2006, preprint available online at http://www.hooklee.com/pub.html. => Li, S., Alvarez, G. & Chen, G. [2006] ¡°Return-map cryptanalysis revisited,¡± Int. J. Bifurcation and Chaos 16, 1557-1568