ETSI TR 103 303 reviews the roles and subsequent measures for the protection of any infrastructure for which loss or damage in whole or in part will lead to significant negative impact on one or more of the economic activity of the stakeholders, the safety, security or health of the population, where such infrastructure is hereinafter referred to as Critical Infrastructure (CI). The resulting measures and processes for Critical Infrastructure Protection (CIP) where the CI in whole or in part is composed of ICT technologies using Cyber-Security mechanisms are defined and relevant mechanisms to be implemented are identified.