Explore a conference talk from Nullcon Goa 2018 that delves into potential security vulnerabilities in India's digital banking systems following demonetization. Learn about flaws in passbook printing machines, government-based wallet systems, credit/debit card protocols, and Aadhaar-based e-KYC processes. Discover how personal information can be compromised and understand the risks associated with Authentication User Agencies (AUA). Gain insights into the cybersecurity challenges faced during India's transition to a cashless economy and the importance of addressing these issues to protect citizens' bank savings.