[cap-talk] What are caps good for? "Encapsulation"? POLAvs.confinement

[Jonathan S. Shapiro]

Which claim do you have in mind?

Oh. That's just encapsulation. Because a process controls its
interfaces, a third party cannot just reach in and read its data. This
means that a process controls what it discloses.

shap

On Sat, 2004-05-08 at 09:49, David Chizmadia (JHU) wrote:
> ----- Original Message ----- 
> From: "Jonathan S. Shapiro"
> > On Fri, 2004-05-07 at 23:20, David Chizmadia (JHU) wrote:
> > > As Shap explained
> > > confinement to me in the context of EROS, it is actually
> > > about ensuring that an agent can only interact with the
> > > outside world through its specified interfaces - *AND THAT
> > > THE OUTSIDE WORLD CAN ONLY INTERACT WITH THE AGENT THROUGH
> > > THOSE SAME INTERFACES*.
> >
> > Shap didn't explain any such thing. Confinement only
> > concerns *outward* communication. It makes no guarantees
> > or claims about the whether the non-confined world is
> > well behaved.
> 
>     So what principle/mechanism provides the constraints that
> allow EROS to make its IP protection claim?
> 
> -DMC
> 
> 
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