@conference {, title = {A framework for opacity in linear systems}, booktitle = {2016 American Control Conference, {ACC} 2016, Boston, MA, USA, July 6-8, 2016}, year = {2016}, doi = {10.1109/ACC.2016.7526666}, url = {https://doi.org/10.1109/ACC.2016.7526666}, author = {Bhaskar Ramasubramanian and Rance Cleaveland and Steven I. Marcus} }