Re: An interesting new computer security problem

2004-09-30 Thread David Honig
At 12:58 PM 9/27/04 -0600, Anne  Lynn Wheeler wrote:
At 11:03 PM 9/24/2004, Peter Gutmann wrote:
A few days ago I was chatting with some people working on a government IT
project who had a rather complex security problem that they needed help
with.
They have a large number of users with Windows dumb terminals (think Xterms
but for Windows) connected to a central ASP server, which runs various
mutually untrusted apps from different vendors.  Their problem was that they
needed a means of securing the individual apps from each other.

I told them that they were in luck, and this exact problem had already been
addressed before.  I'd drop off the detailed technical specs for the
solution
when I next saw them, they could recognise it by its bright orange cover.

Put each app on a separate machine, and don't put any networking
equiptment in the machines.  Simple.



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Re: An interesting new computer security problem

2004-09-29 Thread Anne Lynn Wheeler
note that was being done with virtual machines in the 60s  well before 
the orange book

there were also a number of commercial time-sharing companies offering 
services based on virtual machine technology where possibly mutually 
antagonistic clients were using the services.

we had a service that had some of the most sensitive corporate secrets 
there were  on the same machine with all sorts of BU, MIT, and harvard 
students.

random past references to some of the in-house as well as commerical 
(virtual machine based) time-sharing services from the 60s  70s:
http://www.garlic.com/~lynn/subtopic.html#timeshare

At 11:03 PM 9/24/2004, Peter Gutmann wrote:
A few days ago I was chatting with some people working on a government IT
project who had a rather complex security problem that they needed help with.
They have a large number of users with Windows dumb terminals (think Xterms
but for Windows) connected to a central ASP server, which runs various
mutually untrusted apps from different vendors.  Their problem was that they
needed a means of securing the individual apps from each other.
I told them that they were in luck, and this exact problem had already been
addressed before.  I'd drop off the detailed technical specs for the solution
when I next saw them, they could recognise it by its bright orange cover.
Peter.
(Actually it wasn't quite that simple and easily solveable: The ASP server is
 untrusted as well, it just acts as a middleman for back-ends located at
 various locations, and only the back-ends are trusted.  I figured giving 
them
 the Orange Book would be easier than trying to explain that they had an
 unsolveable problem on their hands).

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