RE: Security-Requirements: alternatives?

["Allison, Art" <AAllison@nab.org>]

See below. 


_____________
Art Allison
Director, Advanced Engineering
Science & Technology
National Association of Broadcasters
1771 N Street, NW
Washington, D.C. 20036
Phone: 202.429.5418
Fax: 202.777.4981
aallison@nab.org

The National Association of Broadcasters is a trade association that
advocates on behalf of more than 8,300 free, local radio and television
stations and also broadcast networks before Congress, the Federal
Communications Commission and the Courts.

-----Original Message-----
From: owner-ipdvb@erg.abdn.ac.uk [mailto:owner-ipdvb@erg.abdn.ac.uk] On
Behalf Of H.Cruickshank@surrey.ac.uk
Sent: Thursday, June 22, 2006 2:09 PM
To: gorry@erg.abdn.ac.uk; ipdvb@erg.abdn.ac.uk; S.Iyengar@surrey.ac.uk;
P.Pillai@Bradford.ac.uk
Subject: RE: Security-Requirements: alternatives?

 Hi Gorry,

This issue has been addressed in the security draft.   Some text has
been added to section 5.1 to this effect: 

Basically, in practice there are not many L2 security systems for MPEG
transmission networks.  Two major examples are:

* Conditional access for digital TV broadcasting is one example that
exists today.  This system is optimised for TV broadcast services only,
and is not suitable for IP packet transmissions and difficult to
interwork with ULE.
AA> See ATSC A/70A. I strongly disagree with assertion about the
difficulty to interwork with ULE. The ULE can be put in a virtual
channel in the ATSC system and the standard directly applied.

* Some other L2 security systems are specified in standards such the MPE
for DVB system . However, MPE security incomplete and there are no known
implementations of such security system.

* For DVB-S2 Generic Streams, where IP encapsulation could be similar to
ULE. The authors believe that ULE security format can be used for
Generic Streams as well.

We would like to ask the ipdvb WG if anybody knows any other existing L2
security systems that might be suitable for ULE.

AA> See ATSC A/70A for ULE when sent in conformance with ATSC Standards.

Haitham
----

Dr. Haitham S. Cruickshank

Lecturer
Communications Centre for Communication Systems Research (CCSR) School
of Electronics, Computing and Mathematics University of Surrey,
Guildford, Surrey GU2 7XH, UK 

Tel: +44 1483 686007 (indirect 689844)
Fax: +44 1483 686011
e-mail: H.Cruickshank@surrey.ac.uk
http://www.ee.surrey.ac.uk/Personal/H.Cruickshank/



-----Original Message-----
From: Gorry Fairhurst [mailto:gorry@erg.abdn.ac.uk] 
Sent: 22 June 2006 15:37
To: Cruickshank HS Dr (CCSR); ipdvb@erg.abdn.ac.uk; Iyengar S Mr (CCSR);
P.Pillai@Bradford.ac.uk
Subject: Security-Requirements: alternatives?

Haitham, I-D Authors, List,

One of the issues we need to be clear about in preparing for a WG
adoption of the security requirements I-D is the possible alternatives
that have been proposed/implemented in other standards organisations.

Could you summarise the methods that have been proposed for MPEG-2
transmission networks that provide equivalent L2 security functions, and
say which to your knowledge has actually have been implemented in
systems?

Thanks,

Gorry