Browse > Article
http://dx.doi.org/10.9708/jksci.2012.17.3.113

A Design of Encryption Method for Strong Security about Tapping/Interception of VoIP Media Information between Different Private Networks  

Oh, Hyung-Jun (Dept. of Computer Engineering, Hongik University)
Won, Yoo-Hun (Dept. of Computer Engineering, Hongik University)
Publication Information
Journal of the Korea Society of Computer and Information / v.17, no.3, 2012 , pp. 113-120 More about this Journal
Abstract
VoIP provides voice data service using existing IP networks and has received much attention recently. VoIP service has a variety of security vulnerabilities. Types of main attacks on VoIP service are tapping/interception, DoS attacks, spam, misuse of service attacks and the like. Of these, confidential information leak because of tapping/interception has been considered as a critical problem. Encryption techniques, such as SRTP and ZRTP, are mostly used to prevent tap and intercept on VoIP media information. In general, VoIP service has two service scenarios. First, VoIP service operates within a single private network. Second, VoIP service operates between different private networks. Both SRTP and ZRTP for VoIP media information within a single private network can perform encryption. But they can not perform encryption between different private networks. In order to solve this problem, in this paper, we modify SRTP protocol. And then, we propose an encryption method that can perform encryption of VoIP media information between the different private networks.
Keywords
VoIP; SRTP; ZRTP; Tapping/Interception;
Citations & Related Records
연도 인용수 순위
  • Reference
1 JaHyun Koo, "VoIP Service Security Vulnerability Analysis", Journal of Korea Institute of Information Security & Cryptology, Vol.16, No.1, pp.60-63, 2006.
2 Sessiong Border Controller, http://www.opensipstack. org
3 M. Baugher, D. McGrew, M. Naslund, E. Carrara and K.Norrman, "The secure real-time transport protocol (SRTP)," RFC 3711, March 2004.
4 P. Zimmermann, A. Johnston, and J. Callas, "ZRTP: Media Path Key Agreement for Secure RTP," Internet-Draft, March 2009.
5 J. Rosenberg, H. Schulzrinne, G. Camarillo, A. Johnston, J. Peterson, R. Sparks, M. Handley, E. Schooler, "SIP : Session Initiation Protocol", RFC 3261, June 2002.
6 C. Huitema, "Real Time Control Protocol (RTCP)attribute in Session Description Protocol (SDP)",RFC 3605, Oct 2003.
7 H. Schulzrinne, S. Casner, R. Frederick, and V. Jacobson, "RTP: A transport protocol for real-time applications," RFC 3550, July 2003.
8 K. Egevang, P. Francis ,"Network Address Translator (NAT)", RFC 1631, May 1994
9 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.
10 Wireshark, http://www.wireshark.org
11 JaeHong Min, PyungDong Jo, "VoIP Technology Trends", Weekly Trends of Tech. No.1021, http://www.itfind.or.kr