Network Working Group L. Dondeti, Ed.
Internet-Draft QUALCOMM, Inc.
Expires: October 30, 2006 D. Castleford
Orange, FTR&D
April 28, 2006
OMA BCAST MIKEY General Extension Payload Specification
draft-dondeti-msec-mikey-genext-oma-00
Status of this Memo
By submitting this Internet-Draft, each author represents that any
applicable patent or other IPR claims of which he or she is aware
have been or will be disclosed, and any of which he or she becomes
aware will be disclosed, in accordance with Section 6 of BCP 79.
Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF), its areas, and its working groups. Note that
other groups may also distribute working documents as Internet-
Drafts.
Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."
The list of current Internet-Drafts can be accessed at
http://www.ietf.org/ietf/1id-abstracts.txt.
The list of Internet-Draft Shadow Directories can be accessed at
http://www.ietf.org/shadow.html.
This Internet-Draft will expire on October 30, 2006.
Copyright Notice
Copyright (C) The Internet Society (2006).
Abstract
This document specifies a new general extension payload type for use
in the Open Mobile Alliance's (OMA) Browser and Content (BAC)
Broadcast (BCAST) group. OMA BCAST's service and content protection
specification uses short term key message (STKM) and long term key
message (LTKM) payloads that in certain broadcast distribution
systems (BDS) are carried in the IETF MIKEY protocol [1]. A new
MIKEY general extension payload specified in this document will be
Dondeti & Castleford Expires October 30, 2006 [Page 1]
Internet-Draft OMA BCAST MIKEY General Extension Payload April 2006
used for that purpose.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. MIKEY General Extension Payload for OMA BCAST Usage . . . . . . 3
4. Interoperability considerations . . . . . . . . . . . . . . . . 4
5. Security Considerations . . . . . . . . . . . . . . . . . . . . 5
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 5
7. Normative References . . . . . . . . . . . . . . . . . . . . . 5
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 6
Intellectual Property and Copyright Statements . . . . . . . . . . 7
Dondeti & Castleford Expires October 30, 2006 [Page 2]
Internet-Draft OMA BCAST MIKEY General Extension Payload April 2006
1. Introduction
The MIKEY specification [1]defines a General extensions payload to
allow possible extensions to MIKEY without defining a new payload.
The general extension payload can be used in any MIKEY message and is
part of the authenticated/signed data part. There is an 8-bit type
field in that payload and the type code assignment is IANA managed
and RFC 3830 requires IETF consensus for assignments from the public
range of 0-240.
The OMA BCAST Service and Content Protection specification [2]
specifies the use of an STKM and an LTKM that carries attributes
related to service and content protection (any keys associated with
the attributes are part of the MIKEY message). The STKM or the LTKM
is to be carried in a MIKEY message in the context of the 3rd
Generation Partnership Project (3GPP)'s Multimedia Broadcast/
Multicast Service (MBMS) BDS. This document specifies the use of the
general extension payload of MIKEY's general extension payload to
carry the LTKMs or STKMs.
The MIKEY general extension payload specified in [3] along with the
MBMS [4] specification specifies the transport of MIKEY messages via
unicast or broadcast and the OMA specifications use either for
transport of MIKEY messages.
2. Terminology
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in RFC-2119 [5].
OMA General Extension payload: We refer to the general extension
payload type -- value, to be assigned by IANA -- as the OMA GenExt
payload.
3. MIKEY General Extension Payload for OMA BCAST Usage
1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
! Next payload ! Type ! Length !
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
! OMA BCAST TKM specific data (variable length) ~
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Dondeti & Castleford Expires October 30, 2006 [Page 3]
Internet-Draft OMA BCAST MIKEY General Extension Payload April 2006
Figure 1: OMA General Extension Payload
The intent is to define a fixed length TKM type variable as part of
the OMA BCAST TKM SpecificData and use that to differentiate between
STKMs and LTKMs.
The only new field introduced from the IETF perspective is the OMA
BCAST TKM specific data (variable length):
OMA BCAST STKM contains the following fields:
protocol_version
protection_after_reception
reserved_for_future_use
access_criteria_flag
traffic_protection_protocol
traffic_authentication_flag
reserved_for_future_use
traffic_key_lifetime
If access_criteria_flag is TRUE the following fields are present
reserved_for_future_use
number_of_access_criteria_descriptors
access_criteria_descriptors
OMA BCAST LTKM contains the following fields:
TerminalBindingKeyID
RightsIssuerURI
4. Interoperability considerations
This document requests a MIKEY [1] General Extension Payload Type
number from IANA through IETF review. The payload defined is
relevant to the 3GPP MBMS adaptation of the OMA BCAST 1.0
specification. Interoperability considerations span at least 3 SDOs
Dondeti & Castleford Expires October 30, 2006 [Page 4]
Internet-Draft OMA BCAST MIKEY General Extension Payload April 2006
and as such it is up to the OMA test planning to verify the
interoperability of the MBMS adaptation of OMA BCAST 1.0. This
payload type assignment does not change MIKEY beyond RFC 3830 and
[3].
5. Security Considerations
According to RFC 3830, the general extension payload can be used in
any MIKEY message and is part of the authenticated/signed data part.
The parameters proposed to be included in the OMA BCAST's MIKEY
General extension payload (listed in Section Section 3) need only to
be integrity protected, which is already allowed by the MIKEY
specification. The OMA BCAST MIKEY General Extension Payload SHALL
be integrity protected. Furthermore, keys or any parameters that
require confidentiality MUST NOT be included in the General Extension
Payload. Note that MIKEY already provides replay protection and that
protection covers the General Extension Payload also.
6. IANA Considerations
Please provide the next available number from the "General Extensions
payload name spaces" in the IANA registry at
http://www.iana.org/assignments/mikey-payloads for use by OMA BCAST
GenExt payload.
7. Normative References
[1] Arkko, J., Carrara, E., Lindholm, F., Naslund, M., and K.
Norrman, "MIKEY: Multimedia Internet KEYing", RFC 3830,
August 2004.
[2] Open Mobile Alliance, "Service and Content Protection for Mobile
Broadcast Services", OMA TS-BCAST-SvcCntProtection-V1_0-
20060412-D, 2006.
[3] Carrara, E., "The Key ID Information Type for the General
Extension Payload in MIKEY", draft-ietf-msec-newtype-keyid-05
(work in progress), March 2006.
[4] 3GPP, "3G Security; Security of Multimedia Broadcast/Multicast
Service (MBMS)", 3GPP TS 33.246 6.6.0, March 2006.
[5] Bradner, S., "Key words for use in RFCs to Indicate Requirement
Levels", BCP 14, RFC 2119, March 1997.
Dondeti & Castleford Expires October 30, 2006 [Page 5]
Internet-Draft OMA BCAST MIKEY General Extension Payload April 2006
Authors' Addresses
Lakshminath Dondeti (editor)
QUALCOMM, Inc.
5775 Morehouse Dr
San Diego, CA
USA
Phone: +1 858-845-1267
Email: ldondeti@qualcomm.com
David Castleford
Orange, FTR&D
4, rue du Clos Courtel
35512 Cesson Sevigne Cedex,
France
Phone: + 33 (0)2 99 12 49 27
Email: david.castleford@francetelecom.com
Dondeti & Castleford Expires October 30, 2006 [Page 6]
Internet-Draft OMA BCAST MIKEY General Extension Payload April 2006
Intellectual Property Statement
The IETF takes no position regarding the validity or scope of any
Intellectual Property Rights or other rights that might be claimed to
pertain to the implementation or use of the technology described in
this document or the extent to which any license under such rights
might or might not be available; nor does it represent that it has
made any independent effort to identify any such rights. Information
on the procedures with respect to rights in RFC documents can be
found in BCP 78 and BCP 79.
Copies of IPR disclosures made to the IETF Secretariat and any
assurances of licenses to be made available, or the result of an
attempt made to obtain a general license or permission for the use of
such proprietary rights by implementers or users of this
specification can be obtained from the IETF on-line IPR repository at
http://www.ietf.org/ipr.
The IETF invites any interested party to bring to its attention any
copyrights, patents or patent applications, or other proprietary
rights that may cover technology that may be required to implement
this standard. Please address the information to the IETF at
ietf-ipr@ietf.org.
Disclaimer of Validity
This document and the information contained herein are provided on an
"AS IS" basis and THE CONTRIBUTOR, THE ORGANIZATION HE/SHE REPRESENTS
OR IS SPONSORED BY (IF ANY), THE INTERNET SOCIETY AND THE INTERNET
ENGINEERING TASK FORCE DISCLAIM ALL WARRANTIES, EXPRESS OR IMPLIED,
INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE
INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
Copyright Statement
Copyright (C) The Internet Society (2006). This document is subject
to the rights, licenses and restrictions contained in BCP 78, and
except as set forth therein, the authors retain all their rights.
Acknowledgment
Funding for the RFC Editor function is currently provided by the
Internet Society.
Dondeti & Castleford Expires October 30, 2006 [Page 7]
