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Extensible Security Architectures for Java

Report ID:
March 1997
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Mobile code technologies such as Java, JavaScript, and ActiveX
generally limit all programs to a single security policy. However,
software-based protection can allow for more flexible security models,
with potentially significant performance improvements over traditional
hardware-based solutions. We describe and analyze three
implementation strategies for interposing flexible security policies
in software-based security systems. Implementations exist for all
three strategies: several vendors have adapted capabilities to Java,
Netscape Communicator extended Java's stack introspection, and we
built a type-hiding system as an add-on to Microsoft Internet Explorer.

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