Re: Information Path Theorem

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Article #28

#28

From: Narendar Shankar
Date: Fri, 10 Nov 2000 04:50

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Bill
I am wondering if arunesh is correct.The ring policy staates that a  
subject can read any object irrespecive of its integrity level-this allows
us to read an object from an integrity level lower than the subject's.

I guess some numbers will make thinsg simpler.

assume 
I(s)=5
I(o1)=3
now s can read o1.
Assume I(o2)=4
therefore s can write to o2.
Because s reads 01 and modifies 02 an ITP exists.
But now I(02) <= I(01) does not hold and hence Theorem 6.2 doesnt hold.

Are we making any wrong assumptions here??Are we making the right
interpretation??Please let us know
sincerely
naren



Narendar Shankar M
Graduate Fellow
Computer Science Dept.
4157-A.V.Williams Building,
University Of Maryland ,College Park
MD-20742

WEBMAIL- narendar_m_s@yahoo.co.uk
HOMEPAGE- www.narendarms.com

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From: Narendar Shankar <narendar@cs.umd.edu>
Newsgroups: csd.cmsc818z
Subject: Re: Information Path Theorem
Date: Thu, 9 Nov 2000 23:50:16 -0500
Organization: U of Maryland, College Park, MD 20742
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