Explore the vulnerabilities and exploits in Indian metro railway systems' ticketing technology in this 35-minute conference talk. Delve into the flaws of the current NFC-based system, focusing on MiFare DESFire EV1 and classic cards. Discover potential methods for free travel and profit-making through system exploitation. Follow the speaker's hacking journey, including brainstormed ideas and encountered challenges. Gain insights into the complexities of NFC technology and its implementation in public transportation, despite limited documentation. Note that this is not an introductory NFC course, but rather a practical exploration of its weaknesses in the context of Indian metro systems.