This workshop will bring together researchers from both academia and industry to discuss methods and tools to achieve security, trust, and privacy (STP) goals of both traditional and emerging Web and mobile based software applications. The workshop will focus on techniques, experiences and lessons learned with respect to the STP aspects of software specification, design, implementation, testing, and deployment. Theme of the Workshop: Our societies are becoming increasingly dependent on software applications. Software applications must be engineered with reliable protection mechanisms with respect to security, privacy, and trust (STP), while still delivering the expected value of applications to end-users. Nonetheless, the scale and severity of security attacks on different types of software applications, from web-based to mobile services, have continued to grow at an ever-increasing pace. Potential consequences of a compromised software application have also become more and more serious as many high-profile attacks are reportedly targeting software applications used in industrial control systems at nuclear power plants, in implanted heart defibrillators, and in military satellites. This situation has been worsened by recent technological developments, including pervasive computing, mobile devices, Web applications and cloud computing, which have made the distrusted Internet an integral component of software applications. The traditional approaches to securing a software application (e.g., anti-virus) alone are no longer sufficient to address the STP issues of such emerging software applications. The STP issues must be addressed throughout the lifecycle of a software application, including its design, implementation, testing, and deployment. The principal obstacle in developing STP-aware software is the lack of consideration, methods, and tools for addressing STP issues under current approaches to software applications development.