@inproceedings{Vigna2003A_Topological, title = {{A Topological Characterization of TCP/IP Security}}, author = {Vigna, Giovanni}, booktitle = {Proceedings of the 12th International Symposium of Formal Methods Europe}, series = {FME}, month = {September}, year = {2003}, address = {Pisa, Italy}, pages = {914--940}, publisher = {Springer-Verlag} }