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Implications for Implementations

Depending on the class of security policies to be implemented, the design of the operating system may be simple or hard. For some policies, a virtual machine model may be sufficient. If distribution of information objects is to be allowed, these machines may be linked by a Virtual Security Network. Here, the authors refer again to the IETF Security Protocol suite of specifications and to CORBA. For more sophisticated policies, the authors recommend to use existing software architectures like message-oriented Object Frameworks. Because of the way the DGSA defines relationships between information domains, the management of the information domains is a key issue for the implementors and users. Furthermore, the are several issues how to create security policies and who is allowed to change them. The authors suggest to design a collection of plugable security modules which implement the policies. Another concern is audit. Implementation must be done so that the audit process and its performance will not lead to turning the audit off.

Tim Wellhausen
2000-01-20