@INPROCEEDINGS{Li:ISM2013, author = {Roland Schmitz and Shujun Li and Christos Grecos and Xinpeng Zhang}, title = {Towards More Robust Commutative Watermarking-Encryption of Images}, booktitle = {Proceedings of 15th IEEE International Symposium on Multimedia (ISM 2013)}, year = {2013}, pages = {283-286}, publisher = {IEEE}, }