Abstract
The confinement of object references is a significant security concern for modern programming languages. We define a language that serves as a uniform model for a variety of confined object reference systems. A use-based approach to confinement is adopted, which we argue is more expressive than previous communication-based approaches. We then develop a readable, expressive type system for static analysis of the language, along with a type safety result demonstrating that run-time checks can be eliminated. The language and type system thus serve as a reliable, declarative, and efficient foundation for secure capability-based programming and object confinement .
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