Web browsers isolate web origins, but do not provide direct abstractions
\nto isolate sensitive data and control computation over it within
\nthe same origin. As a result, guaranteeing security of sensitive web
\ncontent requires trusting all code in the browser and client-side applications
\nto be vulnerability-free. In this paper, we propose a new
\nabstraction, called CRYPTON, which supports intra-origin control
\nover sensitive data throughout its life cycle. To securely enforce
\nthe semantics of CRYPTONs, we develop a standalone component
\ncalled CRYPTON-KERNEL, which extensively leverages the functionality
\nof existing web browsers without relying on their large
\nTCB. Our evaluation demonstrates that the CRYPTON abstraction
\nsupported by the CRYPTON-KERNEL is widely applicable to popular
\nreal-world applications with millions of users, including webmail,
\nchat, blog applications, and Alexa Top 50 websites, with low
\nperformance overhead.<\/p>\n","protected":false},"excerpt":{"rendered":"
Web browsers isolate web origins, but do not provide direct abstractions to isolate sensitive data and control computation over it within the same origin. As a result, guaranteeing security of sensitive web content requires trusting all code in the browser and client-side applications to be vulnerability-free. In this paper, we propose a new abstraction, called 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