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http://dx.doi.org/10.9708/jksci.2013.18.4.087

Redesign and Performance Analysis of RTP(Real-time Transport Protocol) for Encryption of VoIP Media Information between Different Communication Networks  

Oh, Hyung-Jun (Dept. of Computer Engineering, Hongik University)
Park, Jae-Kyoung (Cyber Security Research Center, KAIST)
Won, Yoo-Hun (Dept. of Computer Engineering, Hongik University)
Publication Information
Journal of the Korea Society of Computer and Information / v.18, no.4, 2013 , pp. 87-96 More about this Journal
Abstract
In this paper, we suggest redesigned RTP protocol that is able to perform encryption of VoIP media information for single private network and between the different private networks. And we conduct a test for performance analysis. Such as SRTP or ZRTP methods have been used for VoIP media encryption. But, the existing encryption techniques have problem that can not perform end-to-end encryption between different private networks. In order to solve this problem, in this paper, we redesign RTP protocol. Redesigned RTP includes all information for encryption of VoIP media. Therefore the encryption is not affected by modification of SIP and SDP information that occurred in gateway. Also, redesigned RTP includes code for whether or not to apply encryption. By using the code, modification of RTP header from gateway prevents. As a result, redesigned RTP maintain the integrity and the RTP is able to perform encryption between the different private networks. Also, we conduct a test for performance analysis of SRTP, ZRTP and redesigned RTP.
Keywords
VoIP; RTP; SRTP; ZRTP; Encryption;
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  • Reference
1 K. Egevang, P. Francis ,"Network Address Translator (NAT)", RFC 1631, May 1994
2 Eunsung Park, Dongsu Seong, Keonbae Lee, "Refinement of RTP Processing Unit in SBC for VoIP Media Encryption between Private Networks", Journal of Korean Institute of Information Technology, Vol.9, No.8, pp.185-191, Aug 2011
3 Wireshark, http://www.wireshark.org
4 OmniPeek, http://www.wildpackets.com
5 JaeHong Min, PyungDong Jo, "VoIP Technology Trends", Weekly Trends of Tech. No.1021, http://www.itfind.or.kr
6 JaHyun Koo, "VoIP Service Security Vulnerability Analysis", Journal of Korea Institute of Information Security & Cryptology, Vol.16, No.1, pp.60-63, 2006.
7 JaHyun Koo, "VoIP Service Security Vulnerability Analysis", Journal of Korea Institute of Information Security & Cryptology, Vol.16, No.1, pp.60-63, 2006.
8 Sessiong Border Controller, http://www.opensipstack.org
9 M. Baugher, D. McGrew, M. Naslund, E. Carrara and K.Norrman, "The secure real-time transport protocol (SRTP)," RFC 3711, March 2004.
10 P. Zimmermann, A. Johnston, and J. Callas, "ZRTP: Media Path Key Agreement for Secure RTP," Internet-Draft, March 2009.
11 H. Schulzrinne, S. Casner, R. Frederick, and V. Jacobson, "RTP: A transport protocol for real-time applications," RFC 3550, July 2003.
12 C. Huitema, "Real Time Control Protocol (RTCP) attribute in Session Description Protocol (SDP)", RFC 3605, Oct 2003.
13 J. Rosenberg, H. Schulzrinne, G. Camarillo, A. Johnston, J. Peterson, R. Sparks, M. Handley, E. Schooler, "SIP : Session Initiation Protocol", RFC 3261, June 2002.