I've been searching for the meaning of "security architecture." Various references point to different directions, depending on the source of the reference. For example, security architecture according to network companies is network security. Database people think that security architecture is access control, IT consultants think that security architecture is a working framework and activities, and so on.
In anycase, I decided to define my own security architecture. A presentation material is available at my presentation's page. Unfortunately, it is in Bahasa Indonesia. Although, the terminologies are in English. Go there (to the presentation page) and read the "security architecture" presentation, which I presented a few days ago (24 May 2006) in Jakarta. Comments and feedback are needed.