Welcome to the webpage of the CRISALIS project. CRISALIS aims at providing new means to secure critical infrastructure environments from targeted attacks, carried out by resourceful and motivated individuals. The discovery of highly sophisticated and targeted attacks such as Stuxnet and Duqu showed that these threats are a reality. Their success in infiltrating Critical Infrastructure environments is calling attention on the ineffectiveness of standard security mechanisms at detecting them. Stuxnet, for instance, is believed to have been operating undetected for almost one year leveraging multiple vulnerabilities that were previously unknown, and has been discovered only as a consequence to an operational anomaly that triggered the attention of the field operators. This fact clearly shows that our methods to find vulnerabilities and detect ongoing or successful attacks in critical infrastructure environments are not sufficient. CRISALIS aims at filling this gap with practical, short-term solutions.