Abstract
Code mobility can be defined as the capability to dynamically change the bindings between code fragments and the location in which they are executed. The concept of code mobility is not new, but in recent years has become a hot topic. Web browsers are able to download programs attached to web pages that are executed locally. On the other hand, mobile agent technology allows for agents to autonomously migrate to new hosts. A major concern involved in the use of these technologies is security: the integrity of the receiving host must not be compromised by the execution of mobile code. The local host needs to define a security policy that specifies which resources are made available to mobile code, potentially untrusted. On the other hand, the runtime system must, somehow enforce such policy. In this paper; we present a survey of different techniques aimed at resolving the problem of secure resource management, and argue within which context they are appropriate.
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