O'Reilly logo

Software Fortresses: Modeling Enterprise Architectures by Janet Van Sickler, Roger Sessions

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

1.4. The Fortress as a Trust Boundary

Above all, remember this: The fortress represents a trust boundary. This is the fundamental principle of software fortresses. The fortress represents not only a technical trust boundary, but usually an organizational trust boundary as well. Here I will focus on the technical idea of the trust boundary, formulated as the trust rule:

Definition: Trust Rule

Everybody inside a fortress trusts everybody else inside the fortress, and nobody inside the fortress trusts anybody outside the fortress.

The trust rule tells us that within a fortress there is complete trust, kind of a technical utopia. This concept is perhaps the most radical idea of the software fortress model. Consider, for example, a data strongbox ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required