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<pre>Internet Engineering Task Force (IETF) J. Jeong
Request for Comments: 5748 H. Kim
Category: Informational H. Jeong
ISSN: 2070-1721 Y. Won
Korea Internet & Security Agency
August 2010
<span class="h1">IANA Registry Update for Support of the SEED Cipher Algorithm in</span>
<span class="h1">Multimedia Internet KEYing (MIKEY)</span>
Abstract
This document updates IANA registries to support the SEED block
cipher algorithm for the Secure Real-time Transport Protocol (SRTP)
and the secure Real-time Transport Control Protocol (SRTCP) in
Multimedia Internet KEYing (MIKEY).
Status of This Memo
This document is not an Internet Standards Track specification; it is
published for informational purposes.
This document is a product of the Internet Engineering Task Force
(IETF). It represents the consensus of the IETF community. It has
received public review and has been approved for publication by the
Internet Engineering Steering Group (IESG). Not all documents
approved by the IESG are a candidate for any level of Internet
Standard; see <a href="./rfc5741#section-2">Section 2 of RFC 5741</a>.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
<a href="http://www.rfc-editor.org/info/rfc5748">http://www.rfc-editor.org/info/rfc5748</a>.
Copyright Notice
Copyright (c) 2010 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to <a href="https://www.rfc-editor.org/bcp/bcp78">BCP 78</a> and the IETF Trust's Legal
Provisions Relating to IETF Documents
(<a href="http://trustee.ietf.org/license-info">http://trustee.ietf.org/license-info</a>) in effect on the date of
publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with respect
to this document. Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
<span class="grey">Jeong, et al. Informational [Page 1]</span></pre>
<hr class='noprint'/><!--NewPage--><pre class='newpage'><span id="page-2" ></span>
<span class="grey"><a href="./rfc5748">RFC 5748</a> MIKEY_SEED August 2010</span>
Table of Contents
<a href="#section-1">1</a>. Introduction ....................................................<a href="#page-2">2</a>
<a href="#section-1.1">1.1</a>. SEED .......................................................<a href="#page-2">2</a>
<a href="#section-2">2</a>. Additions to MIKEY Payload ......................................<a href="#page-2">2</a>
<a href="#section-2.1">2.1</a>. Modified Table 6.10.1.b from <a href="./rfc3830">RFC 3830</a> ......................<a href="#page-3">3</a>
<a href="#section-2.2">2.2</a>. Modified Table 6.10.1.d from <a href="./rfc3830">RFC 3830</a> ......................<a href="#page-3">3</a>
<a href="#section-3">3</a>. Security Considerations .........................................<a href="#page-3">3</a>
<a href="#section-4">4</a>. IANA Considerations .............................................<a href="#page-3">3</a>
<a href="#section-5">5</a>. Acknowledgements ................................................<a href="#page-3">3</a>
<a href="#section-6">6</a>. References ......................................................<a href="#page-4">4</a>
<a href="#section-6.1">6.1</a>. Normative References .......................................<a href="#page-4">4</a>
<a href="#section-6.2">6.2</a>. Informative References .....................................<a href="#page-4">4</a>
<span class="h2"><a class="selflink" id="section-1" href="#section-1">1</a>. Introduction</span>
This document updates IANA registries to support the SEED [<a href="./rfc4269" title=""The SEED Encryption Algorithm"">RFC4269</a>]
block cipher algorithm for the Secure Real-time Transport Protocol
(SRTP) and the Secure Real-time Transport Control Protocol (SRTCP)
[<a href="./rfc3711" title=""The Secure Real-time Transport Protocol (SRTP)"">RFC3711</a>] in Multimedia Internet KEYing (MIKEY) [<a href="./rfc3830" title=""MIKEY: Multimedia Internet KEYing"">RFC3830</a>].
<span class="h3"><a class="selflink" id="section-1.1" href="#section-1.1">1.1</a>. SEED</span>
SEED is a 128-bit symmetric key block cipher that has been developed
by KISA (Korea Information Security Agency) and a group of experts
since 1998. The input/output block size of SEED is 128-bit, and the
key length is also 128-bit. SEED has a 16-round Feistel structure.
SEED is a Korean National Industrial Association standard and is
widely used in South Korea for electronic commerce and various
security products such as firewalls, VPNs, and so on.
<span class="h2"><a class="selflink" id="section-2" href="#section-2">2</a>. Additions to MIKEY Payload</span>
This section specifies new code points for the MIKEY [<a href="./rfc3830" title=""MIKEY: Multimedia Internet KEYing"">RFC3830</a>]
payload to indicate the use of the SEED cipher algorithm for SRTP and
SRTCP. There are three applicable modes of running SEED: SEED in
Counter Mode (SEED-CTR), SEED in Counter with CBC-MAC Mode (SEED-
CCM), and SEED in Galois/Counter Mode (SEED-GCM) Mode. These are
defined in [<a href="./rfc5669" title=""The SEED Cipher Algorithm and Its Use with the Secure Real- Time Transport Protocol (SRTP)"">RFC5669</a>].
<span class="grey">Jeong, et al. Informational [Page 2]</span></pre>
<hr class='noprint'/><!--NewPage--><pre class='newpage'><span id="page-3" ></span>
<span class="grey"><a href="./rfc5748">RFC 5748</a> MIKEY_SEED August 2010</span>
<span class="h3"><a class="selflink" id="section-2.1" href="#section-2.1">2.1</a>. Modified Table 6.10.1.b from <a href="./rfc3830">RFC 3830</a></span>
IANA has amended the sub-registry derived from Table 6.10.1.b of
[<a href="./rfc3830" title=""MIKEY: Multimedia Internet KEYing"">RFC3830</a>] as follows:
SRTP encr alg | Value
---------------------
NULL | 0
AES-CM | 1
AES-F8 | 2
SEED-CTR | 3 (NEW)
SEED-CCM | 4 (NEW)
SEED-GCM | 5 (NEW)
Figure 1: Table 6.10.1.b from [<a href="./rfc3830" title=""MIKEY: Multimedia Internet KEYing"">RFC3830</a>] (Revised)
<span class="h3"><a class="selflink" id="section-2.2" href="#section-2.2">2.2</a>. Modified Table 6.10.1.d from <a href="./rfc3830">RFC 3830</a></span>
IANA has amended the sub-registry derived from Table 6.10.1.d of
[<a href="./rfc3830" title=""MIKEY: Multimedia Internet KEYing"">RFC3830</a>] as follows:
SRTP PRF | Value
---------------------
AES-CM | 0
SEED-CTR | 1 (NEW)
Figure 2: Table 6.10.1.d from [<a href="./rfc3830" title=""MIKEY: Multimedia Internet KEYing"">RFC3830</a>] (Revised)
<span class="h2"><a class="selflink" id="section-3" href="#section-3">3</a>. Security Considerations</span>
No security problem has been found on SEED. SEED is secure against
all known attacks including differential cryptanalysis, linear
cryptanalysis, and related key attacks. The only known attack is an
exhaustive search for the key. For further security considerations,
the reader is encouraged to read [<a href="#ref-SEED-EVAL" title=""Self Evaluation Report"">SEED-EVAL</a>].
<span class="h2"><a class="selflink" id="section-4" href="#section-4">4</a>. IANA Considerations</span>
IANA has amended the indicated sub-registries in <a href="#section-2">Section 2</a> of the
MIKEY [<a href="./rfc3830" title=""MIKEY: Multimedia Internet KEYing"">RFC3830</a>] Payload Name registry according to Sections <a href="#section-2.1">2.1</a> and
2.2 above.
<span class="h2"><a class="selflink" id="section-5" href="#section-5">5</a>. Acknowledgements</span>
The authors would like to thank David McGrew, Spencer Dawkins,
SangHwan Park, Brian Weis, and Tim Polk for their reviews and
support.
<span class="grey">Jeong, et al. Informational [Page 3]</span></pre>
<hr class='noprint'/><!--NewPage--><pre class='newpage'><span id="page-4" ></span>
<span class="grey"><a href="./rfc5748">RFC 5748</a> MIKEY_SEED August 2010</span>
<span class="h2"><a class="selflink" id="section-6" href="#section-6">6</a>. References</span>
<span class="h3"><a class="selflink" id="section-6.1" href="#section-6.1">6.1</a>. Normative References</span>
[<a id="ref-RFC3711">RFC3711</a>] Baugher, M., McGrew, D., Naslund, M., Carrara, E., and K.
Norrman, "The Secure Real-time Transport Protocol
(SRTP)", <a href="./rfc3711">RFC 3711</a>, March 2004.
[<a id="ref-RFC3830">RFC3830</a>] Arkko, J., Carrara, E., Lindholm, F., Naslund, M., and K.
Norrman, "MIKEY: Multimedia Internet KEYing", <a href="./rfc3830">RFC 3830</a>,
August 2004.
[<a id="ref-RFC4269">RFC4269</a>] Lee, H., Lee, S., Yoon, J., Cheon, D., and J. Lee, "The
SEED Encryption Algorithm", <a href="./rfc4269">RFC 4269</a>, December 2005.
[<a id="ref-RFC5669">RFC5669</a>] Yoon, S., Kim, J., Park, H., Jeong, H., and Y. Won, "The
SEED Cipher Algorithm and Its Use with the Secure Real-
Time Transport Protocol (SRTP)", <a href="./rfc5669">RFC 5669</a>, August 2010.
<span class="h3"><a class="selflink" id="section-6.2" href="#section-6.2">6.2</a>. Informative References</span>
[<a id="ref-SEED-EVAL">SEED-EVAL</a>] KISA, "Self Evaluation Report",
<a href="http://seed.kisa.or.kr/eng/main.jsp">http://seed.kisa.or.kr/eng/main.jsp</a>
<span class="grey">Jeong, et al. Informational [Page 4]</span></pre>
<hr class='noprint'/><!--NewPage--><pre class='newpage'><span id="page-5" ></span>
<span class="grey"><a href="./rfc5748">RFC 5748</a> MIKEY_SEED August 2010</span>
Authors' Addresses
Seokung Yoon
Korea Internet & Security Agency
IT Venture Tower, Jungdaero 135, Songpa-gu
Seoul, Korea 138-950
EMail: seokung@kisa.or.kr
Jongil Jeong
Korea Internet & Security Agency
IT Venture Tower, Jungdaero 135, Songpa-gu
Seoul, Korea 138-950
EMail: jijeong@kisa.or.kr
Hwankuk Kim
Korea Internet & Security Agency
IT Venture Tower, Jungdaero 135, Songpa-gu
Seoul, Korea 138-950
EMail: rinyfeel@kisa.or.kr
Hyuncheol Jeong
Korea Internet & Security Agency
IT Venture Tower, Jungdaero 135, Songpa-gu
Seoul, Korea 138-950
EMail: hcjung@kisa.or.kr
Yoojae Won
Korea Internet & Security Agency
IT Venture Tower, Jungdaero 135, Songpa-gu
Seoul, Korea 138-950
EMail: yjwon@kisa.or.kr
Jeong, et al. Informational [Page 5]
</pre>
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