@inproceedings{robson:2006a, author = {Robson E. De Grande and S\'{e}rgio Donizetti Zorzo}, title = {Extensao do Sistema Masks para Permitir Sess\~{o}es de Navega\c{c}\~{a}o (portuguese).}, booktitle = {Proceedings of the 8th International Symposium on System and Information Security, S\~{a}o Jos\'{e} dos Campos, Brazil}, year = {2006}, }