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Re: Design principles and ethics
From: |
Jonathan S. Shapiro |
Subject: |
Re: Design principles and ethics |
Date: |
Mon, 01 May 2006 11:31:56 -0400 |
On Mon, 2006-05-01 at 17:15 +0200, Pierre THIERRY wrote:
> Scribit Bas Wijnen dies 01/05/2006 hora 11:30:
> > In order to guarantee confinement (and encapsulation, as you define it
> > below),
> > A. The instantiator must know that there is no unauthorized outward
> > communication. Unauthorized by the instantiator, that is.
> > B. The parent must know that information cannot be extracted from the
> > program
> > without the parent's consent.
> >
> > Now the question is: are these requirements fulfilled for the case of
> > "trivial
> > confinement". Indeed they are, because in that case the parent and the
> > instantiator are the same process, which leads to an implicit trust of each
> > other.
>
> But trivial confinement adds an additional, perhaps unwanted,
> requirement:
>
> C. The child cannot have any capability that the parent couldn't gain
> access to.
I think that this is correct, but it would be more precise to say: "the
child cannot have any *initial* capability that the parent couldn't gain
access to.
Subsequent interaction may lead to the process acquiring more
capabilities.
shap
- Re: Design principles and ethics, Bas Wijnen, 2006/05/01
- Re: Design principles and ethics, Bas Wijnen, 2006/05/01
- Re: Design principles and ethics, Jonathan S. Shapiro, 2006/05/01
- Re: Design principles and ethics, Pierre THIERRY, 2006/05/01
- Re: Design principles and ethics,
Jonathan S. Shapiro <=
- Re: Design principles and ethics, Bas Wijnen, 2006/05/01
- Re: Design principles and ethics, Pierre THIERRY, 2006/05/01
- Re: Design principles and ethics, Bas Wijnen, 2006/05/01
- Re: Design principles and ethics, Pierre THIERRY, 2006/05/01
- Re: Design principles and ethics, Bas Wijnen, 2006/05/02
- Re: Design principles and ethics, Pierre THIERRY, 2006/05/02
- Re: Design principles and ethics, Tom Bachmann, 2006/05/02
- Re: Design principles and ethics, Bas Wijnen, 2006/05/02
- Re: Design principles and ethics, Jonathan S. Shapiro, 2006/05/02
- Re: Design principles and ethics, Jonathan S. Shapiro, 2006/05/01