Dive into the world of e-security with this comprehensive lecture covering essential topics from Unit 0 and Unit 1. Explore the Bangladesh Central Bank incident, anomaly detection, HTTP protocols, GDPR regulations, digital signatures, tokens, trust balance in cybersecurity, open-source security tools, lab environments, and public key cryptography. Gain valuable insights into cipher fundamentals and their practical applications in modern security systems. Enhance your understanding of critical e-security concepts and their real-world implications through this informative session led by Bill Buchanan OBE.