Instantiating an executable from a web browser.

Forum,

I've come across some interesting architectures, but I think this one is
the most puzzling right now.  I have a system that requires a java
application to run in a localized environment (desktop).  The
application is part of a group of tools that fit in to a web based
framework that rely on a web based method of authentication and
authorization.  The problem is this, without ripping the application
apart, there needs to be some AAA surrounding how this desktop
application is loaded on the desktop using the web based AAA.

The question is, how can a browser securely and safely execute
win32/java based desktop applications?  The only way I can see this
happening is creating a command shell and safely passing command
parameters to it.  But the browser in which this executable needs to be
launched is locked down by policies.  Any ideas would be appreciated.

Browser <------------------> AAA
     |
     |
    \|/
Launch win32/Java desktop application local desktop.

Cheers,
Ricc

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