[1664] in WWW Security List Archive
RE: preventing downloading
daemon@ATHENA.MIT.EDU (Winkler Vic)
Fri Mar 15 16:40:14 1996
Date: 15 Mar 1996 13:43:18 U
From: "Winkler Vic" <winkler_vic@po.gis.prc.com>
To: "matt jackson" <mattj@indiana.edu>, "Michael Brennen" <mbrennen@fni.com>
Cc: www-security@ns2.rutgers.edu
Errors-To: owner-www-security@ns2.rutgers.edu
It seems "digital watermarks" are applicable to a sub-problem of the one
discussed below: disseminating information for viewing but not copying.
Watermarks look like very important technology. Check out:
http://www.digital-watermark.com/ArgentFAQ.htm
A similar problem came up several years ago when MLS (Multi level security)
systems were being designed for the then relatively new windowing systems. It
became clear that a simple "cut" from a, say Top Secret window/document, could
be "pasted" into a, say Unclassified window/document. What was the resulting
classification...that question provoked much surprise among the non-windowing
crowd. Avoiding such "holes" entails policies about very low level services and
functionality.
Regards,
- Vic Winkler (Principal Investigator PRC Inc. IW R&D)
E-MAIL: winkler_vic@prc.com FAX: (703) 556-1174
J.R. (Vic) Winkler
PRC
MS: 5W5
1500 PRC Dr.
McLean VA 22102
_______________________________________________________________________________
From: Michael Brennen on Fri, Mar 15, 1996 12:39 PM
Subject: Re: preventing downloading
To: matt jackson
Cc: www-security@ns2.rutgers.edu
On Thu, 14 Mar 1996, matt jackson wrote:
> Is it possible to create a Web site where users can view documents but
> they cannot download or print anything without authorization?
Michael Brennen replied:
The very act of accessing a page or graphic causes it to be downloaded to
the viewing computer.
...
I'm sure that technology will be developed to address
some of this. It is already happening with digital sound records, though
admittedly that is a different matter than text and graphics.
