In the past decade, computer networks have fundamentally influenced the ways in which information is exchanged and handled. Pervasive electronic devices make our everyday life easier, e.g., by helping us to connect with other people while being mobile, to use services available online, or to pay and use tolls and tickets. Many of the components employed routinely manage and distribute large amounts of data for different purposes. As these processes involve sensitive information, protecting information and the network with suitable security measures is more important than ever. The objective of this workshop is to bring together researchers in the field of network security to discuss the open problems and future research directions.