Enhanced Authentication Mechanism of ZRTP
Changjiang Liu · Jisuanji gongcheng · 2011
The original authentication mechanism of Zimmermann RTP(ZRTP) is vulnerable to the Man In The Middle(MITM) attack in certain conditions,although it is a light-weighted and efficient key agreement protocol.This paper introduces a new algorithm named NSAKA to enhance the original mechanism,which is based on the basic concept of Simple Authentication Key Agreement(SAKA).The Session Initiation Protocol(SIP) identity authentication model of RFC4474 is also employed to securely transmit the users' pre-shared secret password.The scheme can effectively enhance the ability to resist against the MITM attack of ZRTP and remedy the primary vulnerabilities of SAKA.