The ACM Conference on Computer and Communications Security (CCS) is the flagship annual conference of the Special Interest Group on Security, Audit and Control (SIGSAC) of the Association for Computing Machinery (ACM). The conference brings together information security researchers, practitioners, developers, and users from all over the world to explore cutting-edge ideas and results. It provides an environment to conduct intellectual discussions. From its inception, CCS has established itself as a high standard research conference in its area. The 23rd ACM Conference on Computer and Communications Security will be held in Vienna, Austria from October 24, 2016 to October 28, 2016. The conference will be held in the famous Hofburg Palace, which was for more than 600 years the official residence of the Habsburg emperors. Today the impressive buildings contain museums and important state rooms as well as the Hofburg convention Center.