RE: Deny access to copy files

[Craig Wright <Craig.Wright () bdo com au>]

Trust but verify.

Good employment contracts, monitor use and access. Log and validate email. Us an IDS with code functions as search 
matches...

A good contract will let you stop most code that leaks as the company it goes to can be estopped from making use of it. 
Make receipt of the code a big enough risk on its own.

Regards,
Dr. Craig Wright GSE LLM


Craig Wright
Manager, Risk Advisory Services

Direct : +61 2 9286 5497
Craig.Wright () bdo com au
+61 417 683 914

BDO Kendalls (NSW-VIC) Pty. Ltd.
Level 19, 2 Market Street Sydney NSW 2000
GPO BOX 2551 Sydney NSW 2001
Fax +61 2 9993 9497
http://www.bdo.com.au/

The information in this email and any attachments is confidential. If you are not the named addressee you must not 
read, print, copy, distribute, or use in any way this transmission or any information it contains. If you have received 
this message in error, please notify the sender by return email, destroy all copies and delete it from your system.

Any views expressed in this message are those of the individual sender and not necessarily endorsed by BDO Kendalls. 
You may not rely on this message as advice unless subsequently confirmed by fax or letter signed by a Partner or 
Director of BDO Kendalls. It is your responsibility to scan this communication and any files attached for computer 
viruses and other defects. BDO Kendalls does not accept liability for any loss or damage however caused which may 
result from this communication or any files attached. A full version of the BDO Kendalls disclaimer, and our Privacy 
statement, can be found on the BDO Kendalls website at http://www.bdo.com.au/ or by emailing mailto:administrator () 
bdo com au.

BDO Kendalls is a national association of separate partnerships and entities. Liability limited by a scheme approved 
under Professional Standards Legislation.
-----Original Message-----

From: listbounce () securityfocus com [mailto:listbounce () securityfocus com] On Behalf Of Ansgar -59cobalt- Wiechers
Sent: Tuesday, 3 June 2008 2:44 AM
To: security-basics () securityfocus com
Subject: Re: Deny access to copy files

On 2008-06-01 Ahmed Khalid wrote:
> I am working for a software house, they are developing a software
> product and their requirement is to restrict programmers to take the
> code out of office premises due to company policy. I am trying to
> configure a windows based machine which denies access to copy files to
> external storage devices connected to USB. There is an NTFS permission
> "Read + Execute" I guess this could do the work but is there any other
> way to do it?
>
> They also don't need programmers to take the code with them in their
> email. I can restrict SMTP and POP ports but when it comes to web
> based emails I am clueless, How can I restrict web based emails like
> hotmail, gmail, yahoo there are so many of these and if I somehow
> manage to block all web based email sites someone can write a script
> to send emails, if not a script HTTP tunneling would bypass any checks
> and bounds defined by my proxy/gateway machine. How can I block such
> thing?
>
> Any help would be highly appreciated.

If you can't trust your developers: fire them. Trying to restrict them
by enforcing policies is pointless. If they're unable to thwart whatever
measure you throw at them either their environment is too ristrictive
for them to be able to work efficiently (which is counter-productive for
the company), or they're incompetent (in which case you may want to find
someone better).

Regards
Ansgar Wiechers
--
"All vulnerabilities deserve a public fear period prior to patches
becoming available."
--Jason Coombs on Bugtraq
eloplEs???