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From: "Douglas A. Gwyn" <DAGwyn@null.net>
To: 9fans@cse.psu.edu
Subject: Re: permissions idea (Re: [9fans] on the topic of viruses)
Date: Tue,  2 Oct 2001 08:34:41 +0000	[thread overview]
Message-ID: <3BB8BCC0.CC5C9FC2@null.net> (raw)
In-Reply-To: <3BB89647.BD039EE5@zip.com.au>

Matthew Hannigan wrote:
> ... perhaps we could have ...

I don't think any scheme with fixed categories of trust
can suffice for heavy-duty security.  Even the military
(fixed) "levels" are augmented by orthogonal (freely
created) "compartments" to attain betten control over
access.  The big problem in automating a security
policy is in stopping people or programs from taking it
upon themselves to circumvent the policy.  The only
viable solution I know of is for *every* mode of access
to *every* object to require the accessor to possess an
appropriate "capability".  Capability-based security is
an old idea, but there have some recent developments
that may make it more practical.


  parent reply	other threads:[~2001-10-02  8:34 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2001-09-28  1:06 [9fans] on the topic of viruses dmr
2001-09-28  9:58 ` Boyd Roberts
2001-10-01 16:13   ` permissions idea (Re: [9fans] on the topic of viruses) Matthew Hannigan
2001-10-01 16:18     ` Matthew Hannigan
2001-10-02  8:34     ` Douglas A. Gwyn [this message]
2001-10-02 15:11       ` Matthew Hannigan
2001-10-04 18:36       ` [9fans] capability-based design (Re: permissions idea) Richard
2001-09-28 14:23 ` [9fans] on the topic of viruses Bobby Dimmette
2001-09-28 18:44   ` Boyd Roberts
2001-09-28 20:35     ` Bobby Dimmette
2001-10-01  9:55       ` Douglas A. Gwyn
2001-10-01 10:40         ` Boyd Roberts
2001-10-01  9:55 ` Douglas A. Gwyn
2001-10-02 15:37 permissions idea (Re: [9fans] on the topic of viruses) presotto
2001-10-03  1:14 okamoto
2001-10-04  9:11 ` Douglas A. Gwyn

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