VoIP Security: Vulnerabilities, Exploits, and Defenses

摘要: Abstract Telephone network is an important part of the critical information infrastructure. Traditional Public Switched Telephony Network (PSTN) has been shown to be reliable and hard tampered with by normal people. The general public put a lot trust on landline telephone, they are relying voice communication for many sensitive (e.g., emergency 911 calls, calls financial institutions) exchange. Voice over IP (VoIP) emerging technology that allows carried Internet instead traditional PSTN. While more shifting from PSTN VoIP, most people not aware security vulnerabilities introduced VoIP keep trusting same as In this chapter, we systematically study issues present state art security. Specifically, discuss requirements people's expectations existing mechanisms. We identified known potential exploits those vulnerabilities. only impact infrastructure itself but also implications users. inherent technical challenges open problems in securing VoIP.