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Portability: We require the security policy be portable in two senses. We must support different security mechanisms, such as those built around X.509 certificates and Kerberos.
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Exportability: Code can be (a) exported and (b) run in multinational testbeds. In short, the exportability issues mean that Globus security policy cannot directly or indirectly require the use of privacy.
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Robustness. The security algorithms must be designed in such a way that if a component is not being used, that component can be restarted without requiring any other component to be restarted. That is, security algorithms must localize their use of system state
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