- International
- IEEE International Conference on Image Processing, 1999 - 2005.
- International Workshop on Digital Watermarking, 2003 - 2005.
- Multimedia Systems and Applications, Boston, 2000 - 2004.
- IEEE Conference on Multimedia and Expo, 2000 - 2005.
- Security and Watermarking of Multimedia Contents, San Jose, CA, 1999 - 2006.
- IEEE International Conference on Information Technology: Coding and Computing, Las Vegas, NV, 2000 and 2001.
- Communications and Multimedia Security, Darmstadt, Germany, May 2001.
- International Conference on Imaging Science and Technology, Las Vegas, NV, June 1997.
- International Geosciences and Remote Sensing Symposium, Lincoln, NE, 1996.