Security and Performance Evaluation in Peer-To-Peer VoIP Communication

The impact of virtual collaborations and digital transformation has led to a significant increase in the use of VoIP technologies. VoIP, which works on a hierarchical client-server architecture in order to adapt to the old circuit-switched technology, has gradually started to use a P2P architecture over time in parallel with the developments in this architecture. The lack of " peer admission" and "control in call flow" features in pure P2P architecture has resulted in vulnerabilities against some attacks, such as modifying, termination, eavesdropping, and SPIT. Although various studies have been conducted to mitigate these vulnerabilities in P2P systems on other platforms, the literature on P2P VoIP is limited. Studies using distributed blockchains were limited to authentication and could not eliminate the system's centralization by keeping SIP servers in their architecture. In this study, we proposed a P2P VoIP system and assessed the feasibility of managing user data via distributed blockchain technology. Our findings reveals that this approach can enhance security and decentralization in P2P VoIP. Furthermore, a thorough performance and security evaluation is conducted on the blockchain type, consensus algorithm, and several blockchain architectures that will be used to manage this data, offering a promising outlook for the future of P2P VoIP.