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George Wahome discusses how VoIP security is often neglected, leaving systems vulnerable to attack. He provides examples of companies that have experienced losses of millions of dollars due to VoIP hacks that went undetected for weeks or months. Following a "rule of thumb" that anything connected to the internet can be hacked if security is not prioritized, he explains common motivations and types of attacks, such as toll fraud, traffic generation to premium numbers, and eavesdropping. Wahome then demonstrates vulnerabilities like credentials cracking and call manipulation on a sample VoIP system. He concludes by recommending the use of TLS, SRTP, server hardening, perimeter security, and unique user pins for login IDs and voicRead less