... advantages of end-to-end Web application security and of our proposed mechanism.1 Introduction Web applications provide end users with client access toserver functionality through a set of Web pages. ... client Web browser.Most Web applications aim to enforce simple, intu-itive security policies, such as, for Web- based email, dis-allowing any scripts in untrusted email messages. Evenso, Web applications ... End-to-end Web Application Security ´Ulfar Erlingsson Benjamin LivshitsMicrosoft ResearchYinglian XieAbstract Web applications are important, ubiquitous...