Mobile devices such as smartphones and Internet tablets have achieved computing and networking capabilities comparable to traditional personal computers. Their successful consumerization has also become a source of pain for adopting users and organizations. For example, the widespread presence of information-stealing applications raises substantial security and privacy concerns. The operating systems supporting these new devices have both advantages and disadvantages with respect to security. On one hand, they use application sandboxing to contain exploits and limit privileges given to malware. On the other hand, they routinely collect and organize many forms of security- and privacy-sensitive information and make that information easily accessible to third-party applications. Recognizing smartphone security and privacy as an emerging area, this workshop intends to provide a venue for interested researchers and practitioners to get together and exchange ideas. The workshop will deepen our understanding of various security and privacy issues on smartphones.