Abstract:
The Real-time Transport Protocol (RTP) is a media transport protocol. RTP is primarily
designed to satisfy of the needs for multimedia transmission [1]. The Secure Real-time
Transport Protocol (SRTP) provides confidentiality, message authentication, and replay
protection for RTP traffic. However, there are risks of weak message authentication in
SRTP Protocol [2]. With a weak Message authentication code it is easy for attacker to
modify the SRTP packets. The main purpose of this paper is to propose an alternative
scheme to provide a stronger authentication and integrity. The proposed scheme is
implemented using Microsoft open source project for conference. The implementation is
tested using StsGui NIST Statistical suite and Cryptool software [3] for security and
Wireshark [4] for performance. The test results show that the proposed modification
enhances the security with minor effect on the quality of service (QoS).