Secure distributed applications are produced by default upon construction. Mechanisms are provided to address distributed application vulnerabilities (e.g., cross-site scripting, cross-site request forgery, replay attacks. . . ) automatically. These mechanisms are provided in conjunction with a tier split component that breaks up an application for execution across multiple contexts or tiers. As a result, any application that is tier split is protected from security vulnerabilities by default without any intervention on the part of a developer.