[Cisspstudy] Security Models

[Belinda Foster]

Ashraf and Nicolas --

I am totally lost........Would the Noninterference Model allow Don to work
on the same production code that the staff is currently using, and the staff
wouldn't be affected by his changes?

Please help me understand.

Thanks,

On Sun, Jun 28, 2009 at 12:56 AM, Ashraf Amin <ashraf_amin01 at hotmail.com>wrote:

>  Noninterference
> ---
> Best Regards,
> Ashraf Amin
>
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> ------------------------------
> Date: Fri, 26 Jun 2009 08:21:29 -0400
> From: belinda.foster at gmail.com
> To: cisspstudy at cccure.org
> Subject: Re: [Cisspstudy] Security Models
>
>
> Nimal --
>
> Don should not be developing/working on code that's in production.
> Period.  If I had to decide on a certain security model, I'd fail this
> question for sure because him working on code that staff members are
> affected by is a MAJOR distractor within this paragraph.
>
> Belinda.
>
> On Thu, Jun 25, 2009 at 5:10 PM, Nimal Gunarathna <ng949 at yahoo.com> wrote:
>
>   Hi,
>
> This question is from Shon H's CISSP V4 Quiz Engine. I immediatly thought
> that this fall
> into a certain security model based on a key statement here but I was
> wrong. Anyway you guys could dissect this ...
>
> Don is a senior manager of an architectural firm. He has just found out
> that a key contract was renewed, allowing the company to continue developing
> an operating system that was idle for several months. Excited to get
> started, Don begins work in the operating system privately, but cannot tell
> his staff until the news is announced publicly in a few days. However, as
> Don begins making changes in the software, various staff members notice
> changes in their connected systems, even though they work in a
> lower-security level. What kind of model could be used to ensure this does
> not happen?
> <cisspstudy at cccure.org>
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