| Sumario: | It is our great pleasure to welcome you to the ACM Symposium on Access Control Models and Technologies (SACMAT 2019). This year's symposium continues its tradition of being the premier forum for presentation of research results and experience reports on leading edge issues of access control, including models, systems, applications, and theory. The aims of the symposium are to share novel access control solutions that fulfil the needs of heterogeneous applications and environments, and to identify new directions for future research and development. SACMAT provides researchers and practitioners with a unique opportunity to share their perspectives with others interested in the various aspects of access control. We had 52 submissions from a variety of countries around the world. Submissions were anonymous; each paper has been reviewed by at least three reviewers who are experts in the field. Extensive online discussions took place to make the selections for the symposium. The program committee finally accepted 12 papers as full papers for presentation at the conference. The program contains 6 short papers, poster and demo presentations, and a panel session. This year we are very happy to welcome three well-known keynote speakers: Securing Big Data: New Access Control Challenges and Approaches, Murat Kantarcioglu (University of Texas at Dallas, USA) Trading SLAs for PhDs: Moving towards streamlined innovation with academia, Kory Fong (RBC, Canada) History and Future of Automated Vulnerability Analysis, Adam Doupé (Arizona State University, USA) Putting together SACMAT 2019 was a team effort. We first thank the authors for providing the content of the program. We are grateful to the program committee, who worked very hard in reviewing papers and providing feedback for authors. Special thanks go to Elisa Bertino (Blue Sky/Vision Chair), Aniket Kate (Panels Chair), Axel Kern (Demonstrations Chair), Murtuza Jadliwala (Poster Chair), James Joshi (Test of Time Award Chair), Dongwan Shin (Webmaster), Hongxin Hu (Proceedings Chair) and Giovanni Livraga (Publicity Chair) for their help in organizing and publicizing the symposium. We also thank the members of the steering committee and especially its chair, Elena Ferrari, for providing valuable advice and support.
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