Explore advanced cryptography concepts focusing on tunnelling protocols like SSL, TLS, and VPN in this 55-minute lecture. Dive into various tunnelling modes, security layers, and secure socket implementations. Examine the intricacies of client hello messages, cipher suites, and OpenSSL. Analyze the Heartbleed vulnerability, including a live demonstration and its timeline. Investigate different VPN types, scenarios, methods, key exchange processes, and routing tables. Gain a comprehensive understanding of secure communication channels and their practical applications in modern cybersecurity.