Cloud computing has emerged as today's most exciting computing paradigm shift in information technology. With the efficient sharing of abundant computing resources in the cloud, users can economically enjoy the on-demand high quality cloud applications and services without committing large capital outlays locally. While the cloud benefits are compelling, its unique attributes also raise many security and privacy challenges in areas such as data security, recovery, privacy, access control, trusted computing, as well as legal issues in areas such as regulatory compliance, auditing, and many others. To implement secure and privacy-aware environments which can provide on-demand computing and high-quality service for cloud users is extremely urgent. This workshop is intended to bring together researchers, developers, and practitioners in security, privacy and mobile computing communities. We encourage submissions on all theoretical and practical aspects, as well as experimental studies of deployed systems.