Abstract
This paper addresses the issue of confidentiality and declassification for global computing in a language-based security perspective. The purpose is to deal with new forms of security leaks, which we call migration leaks, introduced by code mobility. We present a generalization of the non-disclosure policy [AB05] to networks, and a type and effect system for enforcing it. We consider an imperative higher-order lambda-calculus with concurrent threads and a flow declaration construct, enriched with a notion of domain and a standard migration primitive.
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