Proceedings of the First Workshop on Recent Advances on Intrusion-Tolerant Systems Miguel Correia, Nuno Ferreira Neves (editors) DI–FCUL TR–07–05 March 2007 Departamento de Inform´atica Faculdade de Ciˆ encias da Universidade de Lisboa Campo Grande, 1749–016 Lisboa Portugal Technical reports are available at http://www.di.fc.ul.pt/tech-reports. The files are stored in PDF, with the report number as filename. Alternatively, reports are available by post from the above address.