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Re: Sawmill's dataspaces and the Hurd's physmem

From: Neal H. Walfield
Subject: Re: Sawmill's dataspaces and the Hurd's physmem
Date: Tue, 06 Sep 2005 07:15:59 +0100
User-agent: Wanderlust/2.14.0 (Africa) SEMI/1.14.6 (Maruoka) FLIM/1.14.6 (Marutamachi) APEL/10.6 Emacs/21.4 (i386-pc-linux-gnu) MULE/5.0 (SAKAKI)

> It appears to me that a file system server providing a file to a client
> always belongs to that client's trusted computing base. The FS server
> has to belong to the client's TCB, because it will provide the client
> with the content of a file. It may alter that content in any possible
> way before handing it to the client.

I'd like to add that we often don't even care about the correctness of
content.  Consider the web: I don't trust web servers to provide me
with correct data and I generally have no way to computationally
verify that the data is correct.  Nevertheless, I find the web useful
with the caveat that the data may be either malicious or incorrect.


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