Dual Authentication Mechanism of Reliable Session Initiation Protocol

With the fast development of computer network technology, the Session Initiation Protocol (SIP) has been widely applied in multimedia communications. However, the security mechanism of SIP is relatively weak, with security risks such as insufficient identity authentication, brute-force attacks. Therefore, the security of conferencing systems based on the SIP protocol urgently needs enhancement, especially in some key business areas, such as in the electric power industry. This paper proposes a new protocol, Reliable-SIP (R-SIP), to protect the SIP protocol in the multimedia collaborative office system in the dedicated network of the power industry. The R-SIP includes two protocol schemes: the User Authentication-SIP (UA-SIP) scheme and the Message Security-SIP (MS-SIP) scheme. UA-SIP is an extension of the standard SIP protocol providing identity mutual authentication services. MS-SIP is a variant of the standard SIP protocol securing communications and facilitating session key exchange between communication entities. Experimental results show that the proposed R-SIP effectively reduces potential security threats, optimizes the availability and reliability of the system, and provides a more solid security guarantee for multimedia communications in the electric power industry.