This book has been divided into two parts. Part-I describes, evidence-based cases of cyber-crime in the digital banking sector (part of a nation's critical information infrastructure) and the modus operandi of the fraudsters. The loop-holes in the security and business protocols of the digital banks that were actually exploited by the criminals are also described as also the remedial measures that were implemented Since door-step and online-banking are the new normal, the lessons described in the book would thus help digital and fintech start-ups adopt better business models with a security-first philosophy from the outset besides educating customers against social engineering attacks as well.Part-II of the book looks at various threat scenarios for digital banking, involving theft of passwords, OTPs and transactional information, compromise of Android smartphones on which the vast majority of customers rely, and even breach of privacy by turning such devices into spying tools. Each of these scenarios is accompanied by live demonstrations (through screen-shots) of such attacks. The actual scenario inside a typical Security Operations Centre of any critical information facility is brought before the reader; and he is taken as a front-seat witness through testing of typical websites to demonstrate their real-time vulnerabilities. Based on these tactical demonstrations and evidence of inadequacies in the security postures of various institutions and the vulnerabilities of widely-used IT platforms, the author ends the book with a series of policy recommendations at the macro-level, to truly convert a nation into a digital fortress in cyber space.