From: Mark Miller <>
Replying To: Tyler Close <>
Date: Wed, 04 Dec 2002 10:56:52 -0800
Subject: Re: [e-lang] "Capability Myths Demolished" (was: Software security workshop)

At 10:14 AM 12/4/2002 Wednesday, Tyler Close wrote:
>The Dennis and Van Horn system supported protected procedures that
>look very much to me like E objects. A sender could only invoke a
>protected procedure by indexing a capability in its C-list. The
>call was also parameterized with a single capability parameter,
>also obtained by indexing the caller's C-list.
>Given this mechanism, you can implement all the functionality of
>the Granovetter diagram.  How can you draw a line between the
>Dennis and Van Horn system and E?

I hadn't remembered this feature of Dennis and Van Horn.  Perhaps it was only 
that their presentation was memory oriented rather than invocation oriented, 
so I forgot the latter part. But if it was a difference only of 
presentation, then I withdraw my point. I just don't remember this paper 
well enough. tyler shap

Text by me above is hereby placed in the public domain


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