This White Paper provides an overview of the subject of Cybersecurity for Industry. It describes the threats and hazards to which industrial automation systems and production plants are exposed and introduces best practice concepts for minimizing these risks and instituting a level of protection that is acceptable on economic as well as security grounds. It also covers the need to face the increasing threats, due to the trends of digitalization, like universal connectivity and valuable large amounts of data, which make cyber attacks easier and more likely.