We present a new view of information security based on concepts from the Defense Goal Security Architecture. This view looks at security according to the desire to protect and to share information without regard to either the hardware or the software architecture. The result is a separation of concerns and a security architecture that is based on system security requirements without including the network topology or the process interactions. The primary construct of the architecture is the

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... mation domain in which authorized users share information that has a common set of protection requirements. The system design is formed as a product of the security, the hardware, and the software architectures.