Dive into the fundamentals of e-security with this comprehensive lecture covering essential topics in cryptography and digital security. Explore banking infrastructure, examine high-profile security incidents like the Ticketmaster bot attack and British Airways data breach, and understand the implications of GDPR. Learn about pseudo-anonymity, tokenization, and the importance of private keys. Gain insights into encryption concepts through the classic Bob and Alice scenario, and discover practical tools for implementing secure systems. Access additional resources and engage with thought-provoking questions to deepen your understanding of e-security principles.