In times of a crisis -humanitarian, natural, or any other kind- managing the crisis must be the first priority and the infrastructure to do so must be available, reliable, and secure. The information that is communicated using the information systems infrastructure must be authenticated by source, and must be protected from alteration while it is in transit. The wide-spread adoption of Internet-technologies as a means to integrate cross-organizational information flows, increases organizationís dependencies on communication technology. As a result of such increased dependencies, organizations increase their exposure to threats that will potentially compromise the continuity of primary processes, the confidentiality of information and the integrity and availability of critical information. Especially emergency-services, governments, and non-governmental organizations, as well as utility-providers need to pay particular attention securing their processes.