The purpose of the hack.lu convention is to give an open and free playground where people can discuss the implication of new technologies in society. hack.lu is a balanced mix convention where technical and non-technical people can meet each others and share freely all kind of information. The convention will be held in the Grand-Duchy of Luxembourg in October (17-19.10.2017). The most significant new discoveries about computer network attacks and defences, commercial security solutions, and pragmatic real world security experience will be presented in a three days series of informative tutorials. We would like to announce the opportunity to submit papers, and/or lightning talk proposals for selection by the hack.lu technical review committee. This year we will be doing workshops on the first day PM and talks of 50 minutes or 30 minutes in the main track for the three days.