The SEED Cipher Algorithm and Its Use with the Secure Real-Time Transport Protocol (SRTP)
RFC 5669
Internet Engineering Task Force (IETF) S. Yoon
Request for Comments: 5669 J. Kim
Category: Standards Track H. Park
ISSN: 2070-1721 H. Jeong
Y. Won
Korea Internet & Security Agency
August 2010
The SEED Cipher Algorithm and Its Use
with the Secure Real-Time Transport Protocol (SRTP)
Abstract
This document describes the use of the SEED block cipher algorithm in
the Secure Real-time Transport Protocol (SRTP) for providing
confidentiality for Real-time Transport Protocol (RTP) traffic and
for the control traffic for RTP, the Real-time Transport Control
Protocol (RTCP).
Status of This Memo
This is an Internet Standards Track document.
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). Further information on
Internet Standards is available in Section 2 of RFC 5741.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
http://www.rfc-editor.org/info/rfc5669.
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Yoon, et al. Standards Track [Page 1]
RFC 5669 SEED-SRTP August 2010
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Table of Contents
1. Introduction ....................................................3
1.1. SEED .......................................................3
1.2. Terminology ................................................3
1.3. Definitions ................................................3
2. Cryptographic Transforms ........................................4
2.1. Counter ....................................................4
2.1.1. Message Authentication/Integrity: HMAC-SHA1 .........4
2.2. Counter with CBC-MAC (CCM) .................................4
2.3. Galois/Counter Mode (GCM) ..................................6
3. Nonce Format for CCM and GCM ....................................6
3.1. Nonce for SRTP .............................................6
3.2. Nonce for SRTCP ............................................6
4. Key Derivation: SEED-CTR PRF ....................................7
5. Mandatory-to-Implement Transforms ...............................7
6. Security Considerations .........................................7
7. IANA Considerations .............................................8
8. Acknowledgements ................................................8
9. References ......................................................8
9.1. Normative References .......................................8
9.2. Informative References .....................................9
Appendix A. Test Vectors ..........................................10
A.1. SEED-CTR Test Vectors .....................................10
A.2. SEED-CCM Test Vectors .....................................11
A.3. SEED-GCM Test Vectors .....................................12
Yoon, et al. Standards Track [Page 2]
RFC 5669 SEED-SRTP August 2010
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