Security is too important to be left in the hands of just one department or employee — it's a concern of an entire enterprise. Enterprise Security Architecture shows that having a comprehensive plan requires more than the purchase of security software — it requires a framework for developing and maintaining a system that is proactive. Explaining how a proactive system provides business assurance and can enable new business opportunities, this book provides a complete framework — the SABSA model — for developing an enterprise's security architecture. Charts and graphs, as well as descriptions of actual businesses, show how this model can be used in various situations. Furthermore, the SABSA model is flexible enough that its process for architecture development can be adapted to any enterprise, forming a unique solution for each individual business. Useful both to technical security personnel and business managers as a tutorial or as a reference tool, Enterprise Security Architecture outlines a comprehensive security strategy.