Browse > Article

A Media Key Distribution Scheme for Lawful Interception in Secured VoIP Systems  

Roh Hyo-Sun (숭실대학교 정보통신 전자공학부)
Jung Sou-Hwan (숭실대학교 정보통신 전자공학부)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.31, no.8B, 2006 , pp. 730-735 More about this Journal
Abstract
This paper proposes a media key distribution scheme for lawful interception in secured VoIP systems. A problem of the current US or EU standards for lawful interception is that they do not provide a mechanism for collecting keys used for encrypting media streams between two end points. In the proposed scheme, dual encryption was applied on the media keys using two shared secrets: one between the ISP AAA server and user agent, and the other between the TSP registrar and user agent. Only the lawful agency with court warrant can collect both keys from the service providers. This scheme can still provide a privacy by preventing the misusage of the keys by the service providers.
Keywords
Lawful Interception; VoIP; SIP; H.323;
Citations & Related Records
연도 인용수 순위
  • Reference
1 R. Gennaro, et. al., 'Secure Key Recovery,' IBM Thomas J. Watson Research Center, 1999
2 M. Handley, V. Jacobson, 'SDP: Session Description Protocol,' RFC2327, IETF, April 1998
3 PacketCable 1.5 Specifications, 'PKT-SP-ESP1.5-I01-050128: Eectrrnic Surveillance,' Cable Television Laboratories, January 2005
4 C. Huitema, A. Rayhan, J. Segers, 'Megaco Protocol version 0.8,' RFC2885, IETF, August 2000
5 M. Handley, H. Schulzrinne, E. Schooler, J. Rosenberg, 'SIP: Session Initiation Protocol,' RFC3261, IETF, June 2002
6 http://www.cablelabs.com. 'Releases Eleven PacketCable 1.0 Specifications,' Cable Television Laboratories, December 1999
7 H. Schulzrinne, S. Casner, R frederick, V. Jacobson, 'A Transport Protocol for Real-Tune Applications,' RFC1889, IETF January 1996
8 J. Galvin, S. Murphy, S. Crocker, N. Freed, 'Security Multiparts for MIME: Multipart/Signed and Multipart/Fncrypted,' RFCl847, IETF, October 1995
9 ETSI TS 102 232, 'Handover specification for IP delivery,' ETSI, October 2004
10 ETSI TS 201 671, 'Handover interface for the lawful interception of teleconununications traffic,' ETSI, November 2004
11 M. Baugher, D. McGrew, M. Naslund, E. Carrara, K. Norrman, 'The Secure Real-time Transport Protocol(SRTP),' RFC3711, IETF, March 2004
12 CALEA, 'Felexible Deployment Assistance Guide: Fourth Edition,' FBI, May 2004