@INPROCEEDINGS{Li:ISCAS2005, author = {Chengqing Li and Xinxiao Li and Shujun Li and Guanrong Chen}, title = {Cryptanalysis of a Multistage Encryption System}, booktitle = {Proceedings of 2005 IEEE International Symposium on Circuits and Systems (ISCAS 2005)}, year = {2005}, pages = {880-883}, doi = {10.1109/ISCAS.2005.1464729}, publisher = {IEEE}, note = {preprint available online at \url{http://www.hooklee.com/pub.html}}, }